Hydraulic vs. Pneumatic Pressure in Calibration | Gulfcoastcalibratio.com

Hydraulic vs. Pneumatic Pressure in Calibration

by Emmanuel

When considering how to build or enhance a calibration program, there is a lot to consider. Especially when dealing with a wide range of pressure ranges – both high and low – when gas and liquid are employed in the process and as the calibration medium. The fundamental issue is always safety. The pressure range and media that are planned or present in your calibration scope are intimately connected to safety. Fortunately, there are several factors that impact the use of one media over another.


Hydraulic oil being poured into an instrument

What Pressure – What Media??

The distinction between high and low pressure is purely arbitrary. High pressure often refers to pressure ranges exceeding 10,000 psi for pressure calibration components, however this is a matter of opinion and the unique operating environment. Everything is dependent on the extent of the action. If your highest range is 3,000 psi, it is your “high pressure.”

In general, pneumatic medium is utilized to calibrate the majority of pressure sensors with pressure ranges less than 1,500 psi. Some specialized applications need pneumatic media at pressures of up to 10,000 psi. As pressure rises, hydraulic fluids, most typically water or oil, become the dominating medium. It is safer to utilize hydraulic media at these higher pressure levels for the reasons explained below. The capacity to do pneumatic calibrations at pressures more than 10,000 psi exists, although it is an exception and is normally discouraged for safety concerns.

Safety

The amount of energy stored in a container filled with air or a non-volatile gas depends on the pressure and volume of the system. Because of its compressibility, pneumatic medium can store far more energy than hydraulic media. The greater the volume or pressure, the more energy is stored and potentially released in the event of a breach. A abrupt release of pressure into the environment in a high-energy pneumatic system is best defined as an explosion, and it may inflict significant harm to life and property.

Fortunately, most calibrating systems have modest volumes and hence reduced energy, but they can still inflict harm when in close proximity to a breach. The biggest worry in safety is the possibility of a high energy system containment failure. Because the volume of a typical calibration system is small, the major variable of interest is pressure. As a result, hydraulic media is often employed at pressures more than 10,000 psi. When using pneumatic media at pressures more than 10,000 psi, correctly rated fittings and tubing must be used to keep the gas contained inside the system.

Fittings

The standard industrial connectors used for connecting calibrating components containing both hydraulic and pneumatic media have a maximum pressure range of 10,000 to 15,000 psi. Fittings designed for higher pressure systems can also be utilized in low pressure systems. Elastomeric seal fittings must be compatible with the fluids utilized. Fittings developed specifically for greater pressure generally have a maximum pressure of at least 60,000 psi. Most of these are compatible with hydraulic or pneumatic fluids at their rated pressures; however, careful pressure and media selection is required.

Tubing

Depending on the wall thickness, pressure ratings for 1/4 inch OD (outside diameter) seamless stainless steel tube range from 4,000 to 10,300 psi. Fittings and tubing components often used in industrial applications or calibration labs to hold pressure and transmit fluids (both gas and liquid) have pressure ratings of up to and around 10,000 psi. Hardened stainless steel tubing can bear pressures of up to 60,000 pounds per square inch. These tube types are suitable for both gases and liquids.

Flexible nylon tubing with a working pressure rating of roughly 300 psi is often utilized in calibrating applications. Synthetic fiber reinforced flexible tubing with a value of roughly 5,800 psi is also employed. Flexible tubing is often used for pneumatic media, whereas stainless steel tubing is utilized for hydraulic media.

Compatibility

When a device is used in a process that contains hydraulic media, it is usually better to calibrate it using hydraulic fluid. If it is calibrated with air or nitrogen, it must be carefully cleaned to avoid contaminating the pressure calibrator. Alternatively, if a device under test is utilized with a gas and calibrated with a liquid, it must be cleaned before being returned to service to avoid process contamination. These factors must be considered before using a pneumatic or hydraulic medium as the calibration medium.

Pneumatic Media Types

In calibrating applications, pneumatic media are often clean, dry air or nitrogen. Other media, especially inert gasses, can be employed but are often more costly. Because of the significant danger of leakage, some inert gases, such as helium, may need to be avoided. Outside of specialist equipment and optimum calibration settings, flammable gases, such as oxygen, should be avoided, since they can induce spontaneous burning of residual oil at high pressures. The majority of other gases are rarely utilized in calibration.

Hydraulic Media Types

Hydraulic media can be deionized water or oil, depending on the equipment being tested and the calibrator used to generate the pressure. Many fluids can be utilized, but they must be compatible with the equipment under test and the calibrator. Distilled water, sebacate oil, HFE-7500, Shell Tellus-22, and other fluids are commonly used. Fluid recommendations should be provided by the calibration device’s manufacturer.

Conclusion

Many factors influence whether pneumatic or hydraulic media should be used in a calibrating application. Safety, both in terms of equipment and staff, is frequently the first priority. High-pressure pneumatic systems are more dangerous than high-pressure hydraulic systems. When calibrating devices that utilize a different medium, verified compatibility or rigorous cleaning instructions must be followed. To guarantee that all safety hazards are addressed, tubing, fittings, and seals must all be suitable with the medium being utilized.

Let Gulf Coast Manage Your Calibration Schedule.

Are you looking for calibration services, or is your equipment producing out-of-the-ordinary results? If so, you’ve come to the right place. Gulf Coast Calibration has over 40 years of expertise and has developed to become one of the Gulf Coast region finest weighing equipment and calibration firms. Our calibration services, which encompass equipment in a variety of sectors, are provided through our in-house laboratory or on-site at our clients’ facilities.

Call us to discuss your calibration, test or repair needs at:
713.944.3139.

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What are Trade-offs Among Speed, Stability and Volume for Calibration

What are Trade-offs Among Speed, Stability and Volume for Calibration?

by Emmanuel

There are inherent trade-offs between the rate at which a pressure setpoint is reached, the stability of that setpoint once reached, and the volume of the system where the pressure is being introduced when controlling pressure using a precision pressure controller in a calibration laboratory or in a production environment. This is crucial to comprehend for a production line when throughput is key. The correlations between these three factors still exist in calibration labs, where slower speeds and longer stay times are more common, but they have less impact on workflow.

For the sake of this discussion, we will concentrate on a system that includes a device that is being tested or calibrated and a precision pressure calibrating controller, such as the CPC4000. Precision pressure controllers control pressure in a volume made up of tubing, a manifold, and the transducer or transducers under test. An algorithm that reads the controller’s internal reference sensor and adjusts the regulator to add or exhaust gas to and from the system to create a steady pressure controls the stability of the pressure output.

Photo Credit: mensor

In this case, the speed, stability, and volume trade-offs can have a substantial impact on the effectiveness of the entire system.

Speed Vs. Stability

Let’s start by looking at a system with a constant volume’s speed and stability. The predicted maximum pressure variation around a given point over time is the definition of the control stability parameter of a precision pressure controller. A stable situation will be shown, for instance, if the pressure stays within the CPC6050 stability window for a user-defined stable dwell duration, typically 3 or 4 seconds. This stability window is 0.003% of the active transducer range.

The time it takes to arrive at a setpoint while meeting the stability window requirements and dwell time is referred to as the speed.

Pressure calibration devices must quickly achieve a setpoint in a high-speed production testing environment in order to maximize the throughput of the component being tested. More goods can be generated the faster this is done. Testing tire pressure sensors, which are a standard feature in all new cars, is an illustration of this.

Sensors may be linked via a manifold or chamber with a constant volume and checked in groups often. In general, it is more difficult to reach a steady pressure within a short dwell time the faster a volume is filled. Momentum and thermodynamics are involved. When abruptly stopped, a large volume of gas flowing into a system will behave like a spring, causing the pressure to fluctuate about a point until the oscillation is eventually muted. Additionally, as gas moves from a low to a high pressure, it will heat up and then cool down over time, resulting in a reduction in pressure from the starting point.

By reducing the gas flow when the setpoint is reached and then adjusting the gas’s entrance and exhaust to maintain stability at that setpoint, the oscillation as previously mentioned may be managed. To prevent overshoot, the controller’s algorithm must be calibrated to recognize when to begin the throttle-down process and how to respond to slight variations in pressure near the setpoint. Every system will have a perfect set of parameters that regulate the gas’s entry and exit to operate at its fastest and most stable.

However, the faster the setpoint is attained, the more difficult it is to regulate the variation around the setpoint. The volume and geometry of the pipe and valve system, the pressure change, the temperature of the gas, and the temperature of the surrounding environment are all system variables. The operator must balance the need for speed with the need for steadiness. When the dwell period is short, the reading of the pressure standard and the reading of the equipment being tested may disagree somewhat. Given the device’s speed, stability, and precision, the operator will evaluate if the measurements are acceptable.

Speed Vs. Volume

A sensor testing system comprises a fixed volume into which pressure must be regulated. The more volume there is, the more gas is required to attain any particular setpoint. The conclusion is that larger quantities are slower to regulate than smaller volumes, which makes sense. However, bigger volumes may house a greater number of sensors, thus the slower pace may be offset by the greater number of sensors that can be evaluated simultaneously.

Volume Vs. Stability

limited variations in the amount of gas entering or departing the system create a comparatively big change in pressure in a limited volume. Small changes in the amount of gas entering or departing the system, on the other hand, will create minimal change in the system pressure in a big volume. Keeping this in mind, many applications choose a greater capacity to improve system stability.

Conclusion

It is vital to understand how speed, stability, and volume impact overall system performance. Once the aim for these variables has been set, the following step is to select the best pressure controller for the intended output. 

Let Gulf Coast Manage Your Calibration Schedule.

Are you looking for calibration services, or is your equipment producing out-of-the-ordinary results? If so, you’ve come to the right place. Gulf Coast Calibration has over 40 years of expertise and has developed to become one of the Gulf Coast region finest weighing equipment and calibration firms. Our calibration services, which encompass equipment in a variety of sectors, are provided through our in-house laboratory or on-site at our clients’ facilities.

Call us to discuss your calibration, test or repair needs at:
713.944.3139.

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5 Factors To Consider When Selecting A Calibration Company

5 Factors To Consider When Selecting A Calibration Company

by Emmanuel

Weighing and measuring equipment is used in industries ranging from pharmaceutical manufacturing to military contracts to ensure compliance, precision, and safety. Unfortunately, due to normal wear and tear, every measuring instrument loses its effectiveness over time. Calibrating your measuring equipment has various advantages, including increased instrument life, more precise results, simpler certification, and lower expenses.

When it comes to calibrating your equipment, you need a calibration laboratory you can rely on for efficiency and peace of mind. Here are some things to think about when selecting calibration services for your equipment.

Accreditation

One of the characteristics to look for in a calibration lab is if it is third-party accredited. It is critical to work with a calibration service provider who has been accredited by third-party standardization bodies. This is because certification verifies the accuracy of a lab’s calibrations. When you work with an approved calibration laboratory, you can be confident that they satisfy quality assurance standards.

Look for a calibration service provider who has been accredited by numerous standardizing agencies. Some of the most valuable calibration lab accreditations are:

  • ISO/IEC 17025:2005
    This certification is provided by the International Organization for Standardization (ISO) and specifies the competence, consistency, and impartiality of a laboratory. ISO/IEC 17025 certification is commonly seen as a fundamental indicator of a laboratory’s competency. The standard is divided into five sections: general, management system, structure, resources, and process.

    This standard is critical for any calibration laboratory to meet since it improves a lab’s industry reputation and promotes efficiency, performance, and compliance.

  • ISO 9001
    ISO 9001 is another important standard. Although ISO 9001 is not as specifically aimed at calibration laboratories as ISO/IEC 17025, it is an essential part of implementing a quality management system (QMS). A quality management system (QMS) is a set of practices meant to help a company improve continuously.

    ISO 9001 certification may help any company that wants to provide high-quality products. The standard requires companies to document their operations in order to generate a QMS handbook. The accreditation procedure also includes regular audits by a certifying agency.

Capabilities

Precision calibration is critical for assessing the accuracy and effectiveness of your equipment. With so many sectors relying on metrology equipment, calibration laboratories must have the skills and capabilities to operate with a wide range of equipment. Calibration of a thermometer, for example, differs from calibration of a sensor.

A reputable calibration service provider can fulfill all of your calibration requirements, including:

  • Calibration of Pressure and Vacuum
    Pressure gages are widely used in food and beverage processing plants, labs, oil refineries, and other scientific settings. Pressure and vacuum calibration employ computerized pressure modules to determine if pressure gages produce reliable data, assisting organizations in meeting customer expectations and adhering to industry standards.
  • Mass and torque calibration
    Torque devices are used during production when the automotive and machine manufacturing sectors need to measure torque. Manufacturers can guarantee their devices transmit the proper tension to the fastener by performing frequent torque and mass calibration.
  • Calibration of Electronics
    Electrical characteristics such as current, voltage, resistance, time, and frequency must be measured in a variety of businesses. Electrical calibration is performed in calibration labs using calibration equipment that has been certified against standards from independent regulatory authorities.
  • Surface Plate Calibration and Resurfacing
    For accurate measurements, surface plates must fulfill flatness standards. These plates may have peaks or depressions from wear, indicating that they should be resurfaced on a regular basis. Surface Plate Calibration and Refinishing are critical for ensuring that goods satisfy industry requirements.

Accuracy

You want your company’s measurement equipment to be as precise as possible. Accurate calibration equipment can provide more precise findings, boosting the usefulness of your equipment.

A reliable calibration facility will either send a qualified technician to your location or calibrate your equipment in a laboratory. During the calibration procedure, the technician will compare your instrument’s measurements to a standard to check if they match.

If your equipment produces a reading that differs from the norm and falls outside of the standard accuracy ratio, the technician will discover the problem. They will then tweak your instrument till the reading is accurate.

Service To Customers

One of the finest traits of a calibration lab is a commitment to client service. Calibration must be done on a regular basis, perhaps as frequently as every few months, depending on how frequently the device is used. Developing a professional partnership with a full-service calibration service provider guarantees that the calibration process runs smoothly and that your equipment satisfies expert requirements.

Here are some of the customer service advantages to look for in a calibration lab:

  • Knowledgeable technicians: When acquiring on-site calibration services, you want professionals that understand the processes required to calibrate your unique equipment. Look for a trustworthy calibration business that has properly trained specialists that can do on-site calibration.
  • Fast turnaround: When you need equipment calibration services but want to avoid costly downtime, look for a calibration company with fast turnaround times. You should be able to ask a calibration laboratory about how long it takes them to service equipment. Few manufacturers can afford to be without an essential piece of equipment for months as they wait for calibration. Look for a calibration laboratory that can complete the calibration in a few days.
  • Multiple ways to calibrate: Many calibration labs will perform field calibration, where they send a technician to your company’s location to perform the calibration on-site. While this method saves time on shipping, calibration may not work if temperature and humidity interfere with sensitive devices. Look for a calibration service provider that offers multiple calibration methods, including on-site and laboratory calibration. If the lab provides regional pickup and delivery, that’s another bonus.

Experience

When it comes to measuring precision, you need experienced calibration services to assure the functioning of your equipment. Consider hiring a calibrating business with years of expertise. Working with an expert calibration service provider has the following advantages:

  • Precision calibration services on a full-service basis.
  • Professional, experienced specialists that can solve equipment difficulties.
  • Services for equipment repair.

Let Gulf Coast Manage Your Calibration Schedule.

Are you looking for calibration services, or is your equipment producing out-of-the-ordinary results? If so, you’ve come to the right place. Gulf Coast Calibration has over 40 years of expertise and has developed to become one of the Gulf Coast region finest weighing equipment and calibration firms. Our calibration services, which encompass equipment in a variety of sectors, are provided through our in-house laboratory or on-site at our clients’ facilities.

Call us to discuss your calibration, test or repair needs at:
713.944.3139.

Request for Calibration Quote
Request for PPE/Glove Testing Quote

4 Indicators That Your Equipment Needs To Be Calibrated

4 Indicators That Your Equipment Needs To Be Calibrated

by Emmanuel

In an industry where data and measurements are essential factors in daily work, costly equipment is required to provide precise and trustworthy results. Some individuals even go so far as to suggest that scientists are only as good as their equipment. As a result, ensuring that your equipment provides correct measurements is critical to your organization.

Producing dependable and accurate data is critical since many areas rely on it. This is when equipment calibration comes into play. What exactly is calibration? Calibration is the act of reviewing and modifying your equipment to achieve accurate and consistent results.

In this blog post, we will go through some of the most common indicators that your equipment needs to be calibrated, as well as the many types of calibration and which sorts of equipment are ideal for each.

It’s Due (Your Calendar Says So)

One of the most typical indications that your equipment requires calibration is when your timetable specifies it. It is routine protocol to have your equipment calibrated not just at purchase but also yearly, just as you would have your automobile tested. However, this might vary greatly depending on the business and how the equipment is used. Because of their function and direct influence on quality, some industries and equipment may require calibration more frequently than others.

If your company is accredited by a specific industry-standard body, such as the International Organization for Standardization (ISO), this is an excellent example. If this is the case, you may be obliged to follow rules for how frequently your equipment must be calibrated, and failure to do so may result in the loss of your certification.

Damage/Repairs.

It’s usually a good idea to get your equipment calibrated if it’s been damaged or recently fixed, even if the damaged or repaired region wasn’t close to the measuring area. Why? Damage and fixes might unintentionally generate additional internal problems or changes. For example, when repairing a piece of equipment, a sensor may be accidentally bumped, or if a tool or gage is lost, the calibration may be thrown off. Overall, if a piece of equipment is broken or repaired, it is essential to take precautions to ensure accurate findings and measurements.

When Results Are Inconsistent.

Inconsistent and bad results are perhaps the second most prevalent indication that your equipment needs to be calibrated. Products that do not meet specifications or machinery that does not perform as planned are two of the most typical occurrences in this category. Unexpected outcomes may arise from time to time, so keep a look out for results that routinely fall outside of specifications.

A excellent strategy to fight this is to continuously verify and recheck the instrument readings, as well as the quality and standards of the final items. Overall, if you see a result that is even somewhat out of the ordinary, especially over time, getting your equipment calibrated is never a bad idea.

When Requested By The Customer.

Customer requirements are another reason why equipment must be calibrated. Customers may request that your equipment be calibrated to guarantee that they are obtaining correct results, depending on your business and the services you provide. This will not only assist you give correct results for the current consumer, but for many more to come. It may also serve as a prophylactic tool, assisting you to avoid outlier outcomes or catching results that are just outside of the mean. While this is a somewhat uncommon reason for equipment calibration, it is something you should be aware of.

Let Gulf Coast Manage Your Calibration Schedule.

Are you looking for calibration services, or is your equipment producing out-of-the-ordinary results? If so, you’ve come to the right place. Gulf Coast Calibration has over 40 years of expertise and has developed to become one of the Gulf Coast region finest weighing equipment and calibration firms. Our calibration services, which encompass equipment in a variety of sectors, are provided through our in-house laboratory or on-site at our clients’ facilities.

Call us to discuss your calibration, test or repair needs at:
713.944.3139.

Request for Calibration Quote

Request for PPE/Glove Testing Quote

10 Reasons to Calibrate your Instruments with Gulf Coast Calibration

10 Reasons to Calibrate your Instruments with Gulf Coast Calibration

by Emmanuel

Is it more essential to be accurate or timely?

You get both when you work with Gulf Coast Calibration, A2LA-accredited calibrations lab.

Gulf Coast Calibration has been committed to producing the finest, high-precision pressure measurement and calibration systems available since 1981 – it is this international reputation for quality and service that meets your requirements for both timeliness AND accuracy.

We understand your industry and business. We support a wide range of systems in addition to our own. We understand the distinction between process time and lead time, and we guarantee 5-day or less in lead time.

Why Should You Calibrate?

The reasons for calibrating are simple. Component, equipment, and product calibration can:

  1. Spend less money:
    Profits will rise if costs and waste are reduced through standardization.
  2. Ensure Your Safety:
    Products and components that have been calibrated work as expected and are safe to use.
  3. Ensure High Quality:
    Calibrated components and equipment will consistently create standardized products.
  4. Reduce Production Time:
    When high-quality components are available, there is no need to waste time changing out-of-spec components.
  5. Ensure Certification Compliance:
    It is guaranteed that industry rules and corporate certifications are followed.
  6. Ascertain Accuracy:
    Calibration will enable consistent reporting of product correctness.
  7. Allows for traceability:
    If necessary, calibrations can be undertaken with traceability to national standards.
  8. Improve consistency and dependability:
    Products that are manufactured to specifications perform better and endure longer.
  9. Make up for Drift:
    Regular calibration eliminates drift error.
  10. Process Failures Can Be Prevented and Predicted:
    Sensors that are reliable and precise can identify a gradual shift toward out of tolerance process conditions.

How Often Should You Calibrate?

Calibration, at its heart, is a method for determining the best approximation of the real value of a quantity being measured. There is no way to determine the exact value of a measurement, but it is feasible to come close. This proximity to the truth is what we call accuracy. Calibration is a method of ensuring that measurements collected from a device are accurate. This is accomplished by comparing the device output to a more accurate reference device. Best practices necessitate that this reference device be traceable to a national or international standard in SI units.

Some sensors wander more than others. Manufacturers typically have a reasonable notion of how long a sensor will take to drift out of tolerance. A “calibration interval” will be recommended by a manufacturer based on their expertise and the inherent calibration stability of a sensor. The calibration interval is often specified in the sensor’s specifications. The term “recommendation” indicates some freedom in extending or shortening the period based on an individual sensor’s continuing history. Some sensors may remain in tolerance for a longer period of time than others. In practice, the user must decide whether to re-calibrate depending on their experience with each sensor.

Call us to discuss your calibration, test or repair needs at:
713.944.3139.

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5 Steps to Implement ISO 17025 Decision Rule – How to Apply the Decision Rule in a Calibration Results

5 Steps to Implement ISO 17025 Decision Rule – How to Apply the Decision Rule in a Calibration Results

by Emmanuel

The international standard for laboratories that perform testing and calibration is ISO 17025. The application of decision rules is an important part of the standard. A set of criteria known as decision rules is used to determine whether or not a measurement result is valid. They are crucial to the laboratory’s ability to produce accurate and reliable results.

We will go over the five steps necessary to implement ISO 17025 decision rules in your laboratory and demonstrate how to incorporate them into calibration results in this blog post.

Step 1: Determine the Decision Rule

Choosing which rule to use is the first step in putting decision rules into action. Decision rules come in a variety of forms, including statistical, regulatory, and metrological ones. The choice of rule will be determined by the nature of the measurement and the requirements of the laboratory.

Step 2: Define the Acceptance Criteria

The acceptance criteria must now be defined following the determination of the decision rule. The limits within which a measurement result is considered valid are known as acceptance criteria. The measurement uncertainty in the laboratory should serve as the foundation for these criteria, which should be established in such a way as to guarantee the accuracy and dependability of the outcomes.

Step 3: Verify the Decision Rule

It is essential to confirm that the decision rule is appropriate for use in the laboratory before putting it into action. A validation study can accomplish this by analyzing a set of calibration results with the decision rule and comparing them to a reference value.

Step 4: Implement the Decision Rule

The decision rule can be used in the laboratory once it has been tested. This includes integrating the standard into the research center’s quality administration framework, preparing staff on the best way to apply the standard, and guaranteeing that the standard is reliably applied across all estimations.

Step 5: Monitor and Review

Last but not least, it is essential to keep an eye on and evaluate how the decision rule is being applied in order to guarantee that it is working and that the laboratory is delivering results that are trustworthy and accurate. This entails reviewing the results of the calibration on a regular basis, ensuring that the acceptance criteria are met, and adjusting the decision rule or acceptance criteria as necessary.

Now, let’s dive into how to apply the decision rule in calibration results.

The laboratory must first determine whether the measurement result meets the acceptance criteria before applying the decision rule. Assuming the estimation result falls inside the acknowledgment measures, it is viewed as substantial, and no further activity is vital.

The laboratory must decide whether the measurement result is acceptable or not if it does not meet the acceptance criteria. This is accomplished by comparing the measurement result to the decision limit, which is the decision rule’s maximum deviation from the reference value that is acceptable.

The measurement result is deemed acceptable and requires no further action if it falls within the decision limit. The laboratory must take the appropriate action, such as repeating the measurement, investigating the cause of the deviation, or adjusting the measurement method, if the measurement result falls outside the decision limit.

It’s important to remember that the decision rule and acceptance criteria should be checked on a regular basis to make sure they still work well and produce results that are reliable and accurate. Based on the laboratory’s experience and stakeholders’ feedback, modifications to the decision rule or acceptance criteria should be made if necessary.

To sum up, the 5 moves toward execute ISO 17025 choice principles and apply them in adjustment results are:

  • Select the decision rule that is appropriate for the laboratory’s needs and the kind of the measurement being conducted.
  • Establish the acceptance criteria based on the laboratory’s measurement uncertainty and define them in a way that assures trustworthy and accurate findings.
  • Validate the decision rule using a validation study that evaluates a set of calibration findings and compares them to a reference value.
  • Apply the decision rule by incorporating it into the laboratory’s quality management system, training workers on how to use it, and ensuring that it is uniformly implemented across all measurements.
  • Monitor and assess the decision rule’s execution by analyzing calibration results on a regular basis, ensuring that the acceptance requirements are satisfied, and making any required changes to the decision rule or acceptance criteria.

By implementing these five processes, laboratories may verify that their measurement findings are legitimate and consistent, as well as that they suit the needs of their stakeholders. Decision rules are an important aspect of ISO 17025, and laboratories must understand and implement them appropriately in order to deliver trustworthy and accurate findings.

In conclusion, adopting ISO 17025 decision criteria and incorporating them into calibration findings is critical for assuring the dependability and accuracy of a laboratory’s measurement results. Laboratories may generate valid and consistent findings that fulfill the expectations of their stakeholders by following the 5 stages indicated in this blog article and evaluating the decision rule and acceptance criteria on a regular basis.

Call us to discuss your calibration, test or repair needs at:
713.944.3139.

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4 Signs Your Equipment Needs To Be Calibrated

4 Signs Your Equipment Needs To Be Calibrated

by Emmanuel

In an industry where data and measurements are primary considerations in daily work, costly equipment is required to ensure accurate and reliable readings. Some people even go so far as to say that scientists are only as good as their tools. As a result, ensuring that your equipment provides accurate readings is critical to your business.

Producing reliable and accurate data is critical because many fields rely on it. This is where equipment calibration comes into play. What exactly is calibration? Calibration is the process of evaluating and adjusting your equipment to ensure precise and consistent results.

In this blog, we will go over some of the most common indicators that your equipment needs to be calibrated, as well as the various types of calibration and which types of equipment are best for each.

1. It is due (Your Schedule Says So):

One of the most common indications that your equipment requires calibration is when your schedule specifies it. It is standard procedure to have your equipment calibrated not only upon purchase but also annually, just as you would have your car inspected. However, this can vary greatly depending on the industry and how the equipment is used. Because of their role and direct impact on quality, some industries and equipment may require calibration more frequently than others.

If your company is certified by a specific industry-standard agency, such as the International Organization for Standardization, this is a great example (ISO). If this is the case, you may be required to follow guidelines for how frequently your equipment must be calibrated, and failure to do so may result in the loss of your certification.

2. Damage/Repairs:

It’s always a good idea to have your equipment calibrated after it’s been damaged or recently repaired, even if the damaged or repaired area wasn’t close to the measurement area. Why? Damage and repairs can unintentionally cause other internal problems or changes. For example, when repairing a piece of equipment, a sensor may be accidentally bumped, or if a tool or gage is dropped, the calibration may be thrown off. Overall, whenever a piece of equipment is damaged or repaired, it is best to take precautions to ensure accurate results and measurements.

3. Your measurements are inconsistent: 

Inconsistent and poor results are probably the second most common indication that your equipment needs to be calibrated. Products that do not meet specifications or machinery that does not operate as intended are two of the most common occurrences in this category. Unexpected outcomes may occur from time to time, so keep an eye out for results that consistently fall outside of specifications.

A great way to combat this is to consistently check and recheck the instrument readings, as well as the quality and specifications of the final products. Overall, if you notice a result that is even slightly out of the norm, especially over time, having your machine calibrated is never a bad idea.

4. It was requested by the customer.:

Customer requests are another reason why equipment must be calibrated. Customers may request that your equipment be calibrated to ensure that they are receiving accurate results, depending on your industry and the services you provide. This will not only help you deliver accurate results for the current customer, but for many more to come. It can also serve as a preventative measure, assisting you to avoid outlier results or catching results that are just outside of the norm. While this is a relatively uncommon reason for equipment calibration, it is something you should be aware of.

Your Calibration Schedule Will Be Managed by Gulf Coast Calibration

Are you looking for calibration services, or is your equipment producing out-of-the-ordinary results? If so, you’ve come to the right place. Gulf Coast Calibration has over 42 years of experience and has grown to become one of the best weighing equipment and calibration companies in the Gulf Coast Region. Our calibration services, which cover equipment in a variety of industries, are provided through our in-house laboratory or on-site at our customers’ facilities.

We take quality very seriously because our clients rely on us to help them provide quality products and services to their customers. As proof of our quality, we are registered and accredited by ISO/IEC 17025, and our calibrations are performed using NIST-traceable standards.

Call us to discuss your calibration, test or repair needs at:
713.944.3139.

Request for Calibration Quote

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Calibration of Dimensional Tools Ensuring Accuracy and Precision

Calibration of Dimensional Tools: Ensuring Accuracy and Precision

by Emmanuel

In manufacturing and other industries, dimensional tools are used to take precise measurements of objects and materials. These tools are crucial for ensuring that products meet required specifications and quality standards. However, for these tools to provide accurate measurements, they need to be calibrated regularly.

Calibration is the process of comparing the measurements of a tool to a standard of known accuracy. Calibration ensures that the tool is functioning correctly and that its measurements are precise and accurate. In this blog post, we’ll discuss why dimensional tool calibration is important, how it’s done, and some common methods and tools used in calibration.

What is the significance of calibration?

Calibration is crucial for ensuring that dimensional tools are operating correctly and delivering accurate results. Failure to calibrate a tool can result in significant consequences for manufacturing processes, safety, and costs. Here are some reasons why calibration is important:

  • Accurate measurements are essential

When dimensional tools are not calibrated, their measurements can be inaccurate. Inaccurate measurements can lead to the production of defective products or components, which can have serious consequences. For example, a poorly calibrated dimensional tool can cause the production of parts that are too small, leading to malfunctions and possible safety issues.

  • Manufacturing processes can be impacted

Inaccurate measurements can lead to costly delays in manufacturing processes. If a dimensional tool is not calibrated, the production process may have to be stopped, and the tool recalibrated. This can lead to lost time and production costs. Regular calibration of dimensional tools ensures that they are functioning correctly and that the manufacturing process is efficient.

  • Safety concerns can arise

Inaccurate measurements can also pose safety concerns. For example, if a dimensional tool is not calibrated, it can lead to the production of parts that do not fit correctly or are too small. This can result in malfunctions or accidents that can cause injuries or fatalities.

How to Perform Dimensional Tool Calibration

Calibration of dimensional tools is a process that involves comparing the measurements of the tool to a standard of known accuracy. The process involves the use of calibration equipment, such as calibration blocks, gauge blocks, and micrometers. Here’s how it’s done:

  • Preparing for calibration:
    Before calibration, the dimensional tool must be cleaned and inspected for any damage. It’s also important to ensure that the calibration equipment is clean and in good condition.
  • Performing calibration:
    The calibration process involves comparing the measurements of the dimensional tool to a standard of known accuracy. The process typically involves the following steps:
    * Choose a calibration standard that is appropriate for the tool being calibrated.
    * Compare the tool’s measurements to the standard’s measurements, and record the differences.
    * Make any necessary adjustments to the tool to ensure that its measurements are accurate.
    * Repeat the process until the tool’s measurements match the standard’s measurements.
  • Testing the calibrated tool:
    Once the tool has been calibrated, it’s essential to test its accuracy. Testing involves taking measurements using the calibrated tool and comparing them to the measurements of the calibration standard. If the measurements are within the acceptable range, the tool is considered calibrated.

Common Methods and Tools Used in Calibration

There are several common methods and tools used in dimensional tool calibration. Here are a few:

  • Gauge Blocks:
    Gauge blocks are precision blocks of steel, ceramic, or carbide that have been machined to a specific length with very high accuracy. These blocks are used as a reference standard for the calibration of dimensional tools, such as micrometers and calipers. Gauge blocks come in different sizes and shapes and can be used in a variety of configurations to calibrate different types of dimensional tools.

    Gauge blocks are used in the process of direct measurement, where the tool being calibrated is placed in direct contact with the gauge block. The accuracy of the gauge block is determined by its manufacturing process, which uses sophisticated machining equipment and techniques.

  • Micrometers:
    Micrometers are commonly used for the measurement of small distances, with an accuracy of up to a thousandth of an inch. Micrometers are used to measure the thickness of materials, the depth of holes, and the diameter of objects.

    Micrometers work by using a calibrated screw mechanism to move a spindle towards a measuring surface. The movement of the spindle is proportional to the distance being measured. Micrometers can be used in a variety of configurations, including inside micrometers, outside micrometers, and depth micrometers.

    Micrometers require careful handling and are susceptible to damage from shock, vibration, and environmental factors. Regular calibration of micrometers is essential to ensure their accuracy and to prevent damage to the tool.

  • Calipers:
    Calipers are used to measure the distance between two points on an object. They are commonly used in manufacturing, engineering, and construction. Calipers come in two types: inside calipers and outside calipers.

    Inside calipers are used to measure the diameter of holes, while outside calipers are used to measure the diameter of objects. Calipers work by using two jaws that are adjusted to fit around the object being measured. The distance between the jaws is then measured on a scale.

    Calipers can be used in different configurations, including dial calipers, digital calipers, and vernier calipers. The accuracy of calipers is determined by their manufacturing process and the calibration of their measuring scale.

  • Optical Comparators:
    Optical comparators are used to measure the dimensions of objects by projecting an image of the object onto a screen. The image is magnified, and measurements are taken using a calibrated scale.

    Optical comparators are often used for measuring complex parts that cannot be measured using conventional dimensional tools. The accuracy of optical comparators depends on the resolution of the measuring scale and the magnification of the image.

  • CMMs:
    Coordinate measuring machines (CMMs) are computer-controlled machines used for high-precision dimensional measurements. CMMs work by using a probe to take measurements of an object in three dimensions.

    CMMs can be used to measure the dimensions of complex objects with high accuracy and repeatability. CMMs are often used in industries such as aerospace, automotive, and medical devices.

Conclusion

Calibration is an essential process for ensuring that dimensional tools are providing accurate and precise measurements. There are several common methods and tools used in calibration, including gauge blocks, micrometers, calipers, optical comparators, and CMMs. The selection of the appropriate method and tool depends on the type of tool being calibrated and the level of accuracy required. Regular calibration of dimensional tools is crucial to ensure their accuracy and reliability.

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713.944.3139.

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IR Thermometer Calibration Procedure - Gulfcoastcalibration

How to Use an Ice Bath to Check the Accuracy of Your IR Thermometer- IR Thermometer Calibration Procedure

by Emmanuel

Infrared thermometers, also known as IR thermometers, are widely used to measure the temperature of objects and surfaces. These devices are known for their speed, accuracy, and convenience, but it is important to periodically verify the accuracy of your IR thermometer to ensure that it is providing reliable temperature readings. In this blog post, we will discuss how to verify the accuracy of your IR thermometer using an ice bath and the IR thermometer calibration procedure.

Why Calibrate Your IR Thermometer?

Calibrating your IR thermometer is important to ensure that you are getting accurate temperature readings. IR thermometers use a lens to focus the infrared energy emitted by an object onto a temperature sensor. Over time, the lens may become dirty, scratched, or damaged, which can affect the accuracy of the temperature readings. In addition, the temperature sensor may drift due to changes in ambient temperature or humidity, which can also impact the accuracy of the readings.

By regularly calibrating your IR thermometer, you can ensure that it is providing accurate temperature readings. This is particularly important for applications that require precise temperature measurements, such as cooking, HVAC, and industrial processes.

The Ice Bath Calibration Procedure

The ice bath calibration procedure is a simple and effective way to verify the accuracy of your IR thermometer. Here are the steps to follow:

  1. Fill a container with ice and water. Stir the water until it reaches a homogeneous temperature, which is typically close to 32°F (0°C).
  2. Immerse the temperature sensor of your IR thermometer into the ice bath, making sure that it is fully submerged.
  3. Turn on your IR thermometer and aim it at the surface of the ice bath.
  4. Take a temperature reading and compare it to the known temperature of the ice bath, which is 32°F (0°C).
  5. If the reading is different from the known temperature, adjust the calibration of your IR thermometer to match the ice bath temperature. This can usually be done using the menu settings on the device.
  6. Repeat the process a few times to ensure that the IR thermometer is providing accurate and consistent temperature readings.

Tips for Accurate Ice Bath Calibration

Here are a few tips to keep in mind to ensure accurate ice bath calibration:

  1. Use a large enough container of ice and water to ensure that the temperature of the ice bath is homogeneous.
  2. Stir the water in the ice bath to help it reach a homogeneous temperature.
  3. Immerse the temperature sensor of your IR thermometer fully into the ice bath to ensure that it is getting a representative temperature reading.
  4. Avoid touching the lens of your IR thermometer during the calibration procedure, as this can affect the accuracy of the temperature readings.
  5. Repeat the calibration procedure a few times to ensure that the IR thermometer is providing accurate and consistent temperature readings.

Conclusion

Verifying the accuracy of your IR thermometer using an ice bath is a simple and effective way to ensure that it is providing reliable temperature readings. By following the steps outlined in this blog post, you can ensure that your IR thermometer is providing accurate temperature readings for all your applications. Don’t forget to calibrate your IR thermometer regularly to ensure that it is providing accurate temperature readings over time.

Call us to discuss your calibration and repair needs at:
713.944.3139.

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calibration

The Key Factors Affecting Calibration

by Emmanuel

Proper instrument calibration is important to prevent potential error sources from degrading the result. Several factors can occur during and after a calibration that can affect its result. Among these are:

Using The Wrong Calibrator Values

It is important to closely follow the instructions for use during the calibration process. Disregarding the instructions and selecting the wrong calibrator values will “teach” the instrument incorrectly, and produce significant errors over the entire operating range. While many instruments have software diagnostics that alert the operator if the calibrators are tested in the incorrect order (i.e. Calibrator 2 before Calibrator 1), the instrument may accept one or more calibrators of the wrong value without detecting the operator error.

Calibrator Formulation Tolerance

It is important to use calibrators that are formulated to tight tolerance specifications by a reputable manufacturer. There is a tolerance associated with formulating a calibrator/control due to normal variations in the instrumentation and quality control processes. This tolerance can affect the mean value obtained when using the calibrator. For example, if the calibrators have nominal values of 50 and 850 mOsm/kg H2O, and were manufactured toward the low end of their allowable range, the net effect might be to lower the calibration curve by approximately several mOsm/kg H2O over the calibrated range.

As an example, Figure 3 illustrates what can happen in a situation where Calibrator 2 is assumed to be at its nominal value, say 850 mOsm/kg H2O, when the true formulated value is 846. The calibration process “teaches” the instrument incorrectly that 846 is actually 850, thus raising the Actual Results curve higher than it would be if the instrument were “taught” that Calibrator 2 was 846 mOsm/kg H2O, or Calibrator 2 had an actual formulation value of 850 mOsm/kg H2O.

Sample Preparation Technique

As in the case of normal testing, good sample preparation technique is essential to obtaining the best performance from the calibration process. A similar situation to that depicted in Figure 3 can occur if good sample preparation techniques are not followed when providing the calibrator samples. Conditions such as pipeting different sample volumes, allowing air bubbles in the samples, or preparing the samples too early so that evaporation occurs, can all increase the variation in the results obtained from the calibrators tested in the calibration process.

This increased variation can result in mean values for the calibrators that vary by several mOsm/kg H2O from what they should be, erroneously shifting the calibration curve, resulting in increased errors for all results.

Ambient Temperature Effects

It is important to periodically calibrate an instrument at a temperature close to that at which it will be operated. Even when a calibration is performed properly, there are other factors that can affect the accuracy of results. Environmental factors, such as the ambient temperature, can introduce errors that may not be readily evident when testing samples with unknown values.

Components, such as electronics, used in an instrument may be affected by changes in operating temperature. If an instrument is calibrated at one temperature and then operated at a significantly different temperature, the temperature-induced error can also degrade the results’ accuracy.

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713.944.3139.

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