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 is the metering skid, a system for the custody transfer measurement of the amount of natural gas transferred. A global 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 may be the flow computer. It processes the information from all of the measuring instruments and calculates the exact amount of gas that flows to the customer. Gas is compressible, so the monitoring of pressure and temperature during gas transfer plays an essential role.
Verification may be the law
Because even small measuring errors could cause noticeable losses in turnover, the measuring instruments must be calibrated regularly. Normally, this is done at the facility. Each on-site calibration must be verified relative to regulations. This means 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 use in hazardous areas.
In view of certain requirements, the calibration personnel of WIKA customers previously had to use many different pieces of equipment so as to adequately fulfil their tasks. Along with 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 required for on-site calibration.
Four measuring channels
The natural 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 and 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 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. Warning and the very large memory capacity support the user in the next documentation of the on-site calibration. The machine provides all the details relevant for verification.
Note
Detailed Conscientious multi-function calibrators is available on the WIKA website. Each instrument includes a modular design and may therefore be specified for the respective selection of applications. Should you have any further questions, your contact will gladly help you.