Gas: On-site calibration optimised at the metering skid

On-site calibration of measuring instruments is frequently very time-consuming and expensive. This is especially true for applications with several measurands. One example of this is 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 significantly streamlined the testing process at this stage: with the multi-functional CPH8000-P1 calibrator from WIKA, a ?calibration laboratory in a case?.
The center of a metering skid may be the flow computer. It processes the information from all the measuring instruments and calculates the exact amount of natural gas that flows to the client. Natural gas is compressible, therefore the tabs on pressure and temperature during gas transfer plays a crucial role.
Verification may be the law
Because even small measuring errors can cause noticeable losses in turnover, the measuring instruments should be calibrated regularly. This is usually done at the facility. Each on-site calibration must be verified relative to regulations. This implies proving consistent repeatability of the test outcomes and traceability to the assigned references. Furthermore, 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 use many different devices so as to adequately fulfil their tasks. As well as 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 time and effort 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 a single fell swoop with the CPH8000-P1 portable multi-function calibrator from WIKA. The case-mounted instrument calibrates pressure measuring instruments as well as resistance thermometers and thermocouples. The test pressure is generated having an integrated pump. The CPH8000-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 the user in the subsequent documentation of the on-site calibration. The machine provides all the details relevant for verification.
Note
Detailed info on Invasion multi-function calibrators can be acquired on the WIKA website. Each instrument has a modular design and may therefore be specified for the respective range of applications. In case you have any more questions, your contact will gladly help you.

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