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FAQ

We get a lot of questions from calibration professionals. You will find some of the most frequently asked questions listed below. If you do not find the answer to your question, you can also try the Library or Video tab in our Knowledge section.

Differential Pressure Standards

Crystal Engineering offers multiple differential pressure gauges and differential pressure calibrators to meet various differential pressure needs.
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How are Crystals products accuracy rated?

Our products are rated in "% of reading" - like deadweight testers - but unlike deadweight testers, they're not affected by ambient temperature (or local gravity).
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How to Measure Pressure and Record Pressure and Temperature in Gas Reduction Stations

Our products are used in reduction stations where pipeline pressure and temperature are closely modified to continue the distribution system.
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How to Measure Pressure and Record Pressure in Oil & Gas Compressor Stations

Our products are used in compressor systems where pipeline pressure is boosted to make up for lost pressure due to friction.
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How to Measure Pressure and Record Pressure in Oil & Gas Distribution Systems

Our products are used in the distribution system to ensure that gas reaches each customer with sufficient flow and pressure.
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How to Measure Pressure and Record Pressure in Gas Service Lines

Our products are used to measure pressure in gas service lines.
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How to Measure Pressure and Record Pressure in Oil & Gas Gate Stations

Our products are used in gate systems where pressure from distribution lines are reduced, an odorant is added, and the flow rate is calculated.
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How to Measure Pressure and Record Pressure in Oil & Gas Gathering Systems

Our products are used in gathering systems to transport oil and gas from the well site to processing plants or the transmission systems.
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How to Measure Pressure and Record Pressure in Oil & Gas Processing Plants

Our products are used in processing plants to clean the raw natural gas by separating contaminants such as water, carbon dioxide, and hydrogen sulfide.
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How to Measure Pressure and Record Pressure in Distribution Grids

Our products are used in the distribution grid to measure pressure at varies ranges.
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How to Measure Pressure and Record Pressure in Oil & Gas Transmission Systems

Our products are used in transmission systems to transport large amounts of natural gas from gathering systems to local distribution companies.
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Is it possible to calibrate short sensors in standard dry-blocks?

To calibrate short temperature sensors is always a challenge. The higher temperature you want to calibrate, the more difficult it becomes.
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What does fully temperature compensated mean?

All digital pressure gauges are "temperature compensated" but when you study the fine print, you will find that temperature can still have a big effect on accuracy.
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What is a Resistance Temperature Detector (RTD)?

As the name implies, they are sensors used to measure temperature by correlating the resistance of the RTD element with temperature. RTD element is made from a pure material which has a predictable change in resistance as the temperature changes
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What is the maximum thickness of a sensor that one can calibrate in a temperature calibrator?

This is depending on the accuracy you expect to gain from the calibration. If sensors are having a diameter of more than 9 mm the heat loss up through the sensor is becoming very high.
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What is the uncertainty of Crystal products?

Uncertainty has to be considered for each individual test done by the customer themselves. There are a number of variables in the uncertainty calculation that Crystal does not control such as the physical setup, operational procedures, and ambient environment.
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What are Metering Systems and How to Easily Calibrate Them On Site

Our products are used to calibrate simple mechanical domestic meters and high-end flow computers at metering systems.
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What is a Pressure Calibration Reference Standard

Pressure calibration is simply the process of comparing a pressure measurement device (the device under test or DUT) to a reference gauge or reference standard.
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What is the Difference Between Absolute Pressure and Gauge Pressure

One big difference in how pressure gauges are rated is gauge vs. absolute pressure. Both measure pressure, but a gauge pressure device is zeroed against atmospheric conditions, where an absolute pressure gauge is not.
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What is the Difference Between Crystal Logging Software Option

Crystal has two different logging software options available to communicate with their pressure instruments. Click for a comparison of the two logging software options.
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What is the Difference Between Dry Block and Bath Temperature Calibration

Two types of systems are available for temperature calibration: dry block and liquid bath. As their names imply, the two treat the calibration of temperature in distinctly different ways.
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Which Calibration Instrument is Right for Me

A quality calibration instrument can be a large investment. So, matching a calibration instrument to specific calibration needs and requirements is an important decision.
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