Natural gas: On-site calibration optimised at the metering skid

On-site calibration of measuring instruments is frequently very time-consuming and expensive. This is also true for applications with several measurands. One example of this may be the metering skid, a system for the custody transfer measurement of the quantity of natural gas transferred. A worldwide player in the industry from Saudi Arabia has now significantly streamlined the testing process at this point: with the multi-functional CPH8000-P1 calibrator from WIKA, a ?calibration laboratory in a case?.
The center of a metering skid is the flow computer. It processes the information from all of the measuring instruments and calculates the precise amount of natural gas that flows to the client. Gas is compressible, so the tabs on pressure and temperature during gas transfer plays a crucial role.
Verification is the law
Because even small measuring errors could cause noticeable losses in turnover, the measuring instruments should be calibrated regularly. This is usually done at the facility. Each on-site calibration must also be verified in accordance with regulations. This implies proving consistent repeatability of the test results and traceability to the assigned references. In addition, the regulations require the test equipment to be approved for used in hazardous areas.
In view of certain requirements, the calibration personnel of WIKA customers previously had to utilize many different pieces of equipment as a way to adequately fulfil their tasks. In addition to pressure and temperature calibrators, this included a pneumatic pump for the test pressure, a HART� communicator and a resistance decoder. The on-site calibration cost effort and time accordingly.
The CPH8000-P1 multi-functional calibrator significantly reduces the effort necessary for on-site calibration.
Four measuring channels
The gas company in Saudi Arabia has reduced this effort in one fell swoop with the CPH8000-P1 portable multi-function calibrator from WIKA. The case-mounted instrument calibrates pressure measuring instruments in addition to resistance thermometers and thermocouples. The test pressure is generated having an integrated pump. Venomous -P1 has four measuring channels. It can thus perform and display around four measurements simultaneously. The ATEX-approved version also supplies the test items and reference sensors in the metering skid with voltage (DC 24 V) without danger.
Documentation without problems
During the test procedure, the CPH8000-P1 ? via its integrated HART� module ? communicates directly with the measuring instruments, which are also HART�-capable. Its powerful data logger and the very large memory capacity support an individual in the subsequent documentation of the on-site calibration. The unit provides all the details relevant for verification.
Note
Detailed Outstanding multi-function calibrators is available on the WIKA website. Each instrument has a modular design and will therefore be specified for the respective selection of applications. Should you have any further questions, your contact will gladly assist you to.

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