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

On-site calibration of measuring instruments is often very time-consuming and expensive. This is especially true for applications with several measurands. One example of this is the metering skid, something for the custody transfer measurement of the quantity of natural gas transferred. A global player in the industry from Saudi Arabia has now significantly streamlined the testing process at this time: with the multi-functional CPH8000-P1 calibrator from WIKA, a ?calibration laboratory in a case?.
The heart of a metering skid may be the flow computer. It processes the info from all of the measuring instruments and calculates the exact amount of gas that flows to the client. Gas is compressible, therefore the tabs on pressure and temperature during gas transfer plays an essential role.
Verification is the law
Because even small measuring errors can cause noticeable losses in turnover, the measuring instruments must be calibrated regularly. Normally, this is done at the facility. Each on-site calibration must also be verified relative to regulations. This means proving consistent repeatability of the test outcomes and traceability to the assigned references. In addition, the regulations require the test equipment to be approved for use in hazardous areas.
In view of the requirements, the calibration personnel of WIKA customers previously had to utilize many different devices 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.
Rules 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 and also resistance thermometers and thermocouples. Successful is generated with an integrated pump. The CPH8000-P1 has four measuring channels. It could thus perform and display up to 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 the user in the next documentation of the on-site calibration. The unit provides all the details relevant for verification.
Note
Detailed info on the model CPH8000 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 more questions, your contact will gladly help you.