Video: How to prevent contamination in Calibration?

If your workload includes devices that contain different substances like water, oil, and gas, you could be at risk for contamination -- something getting into your system that isn't supposed to be there. The optional Contamination Prevention System (CPS) helps to keep the 6270A Modular Pressure Controller/Calibrator's valves clean and free from debris.

This video demonstrates the CPS so you can see how it works.

          Transcript   

Preventing contamination in a pressure calibration system

Contamination can lead to errors and damage your pressure calibration system and the devices you are calibrating. Keep contamination at bay by using a 6270A Modular Pressure Controller/Calibrator with the optional Contamination Prevention System.

Pressure gauges and sensors are used in many applications. They can routinely come into contact with water, oil, solid particles and other forms of contamination. This can play havoc when it comes time to recalibrate them, because this contamination gets into your calibration standard. Buildup of these contaminates can also cause measurement errors and even be reintroduced in other devices.

With the 6270A Modular Pressure Controller/Calibrator, Fluke Calibration provides a new solution: the optional Contamination Prevention System, or CPS. In a pneumatic calibration, the calibrator pressurizes the gauge being tested with clean gas. When the pressure is decreased, any liquid and particles in the gauge are flushed out and drawn back into the plumbing and through the calibrator. This contamination can cause errors and damage equipment. Filters and liquid traps are often used to prevent contamination damage, but they can’t stop all of it from returning to the calibrator – especially the airborne vapors common when you depressurize a vessel.

The 6270A CPS is more than just a filter or trap. It’s an integrated contamination prevention system that operates seamlessly with the 6270A CPS with 6270A ensures that clean, dry gas flows from the calibrator to the test stand. Contaminated gas flows away from the calibrator, plumbing and the device being calibrated.

To use the CPS with the 6270A:

1.  Connect the 6270A test port to the side test port of the CPS, using the pressure line provided
2. Connect the electrical signal cable to the CPS.
3. Connect the pressure line to the back of the 6270A.
4. Connect the electrical signal cable to the green valve driver connector on the back of the 6270A.
5. Enable the CPS from the 6270A’s front panel by pressing Setup/Instrument Setup and then enabling the CPS. Once enabled, the CPS runs constantly and seamlessly for every calibration and every test pressure , providing effective contamination prevention… even with a new operator or a lapse in procedure.
6. To demonstrate the capability of the CPS, we are using this gauge that is completely full of this red liquid.
7. Next, connect the device under test to the test port connection on top of the CPS, using the provided adapter. When controlling up in pressure, the pressure controller works normally. When controlling down in pressure, the controller actuates the vent valve on the CPS, maintaining uni-directional flow away from the pressure controller.  
8. After controlling to multiple pressures, as someone would do when calibrating a gauge like this one, we can vent the system and disconnect the device under test. We see that all of the contamination has gone into the purge bottle, not back into our controller.

 The Contamination Prevention System is an exclusive accessory from Fluke Calibration that protects your pressure controller investment, the devices being tested, the quality measurements, and your peace of mind.

For more information about the 6270A Pressure Controller/Calibrator and the Contamination Prevention System, visit us on the web at flukecal.com