On-site calibration of measuring instruments is frequently very time-consuming and expensive. This is also true for applications with several measurands. One of these of this may be the metering skid, a system for the custody transfer measurement of the quantity of natural gas transferred. Sly in the industry from Saudi Arabia has now significantly streamlined the testing process at this stage: with the multi-functional CPH8000-P1 calibrator from WIKA, a ?calibration laboratory in an incident?.
The heart of a metering skid is the flow computer. It processes the information from all of the measuring instruments and calculates the exact amount of natural gas that flows to the customer. 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 must be calibrated regularly. Normally, this is done at the facility. Each on-site calibration must also be verified in accordance with 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 certain requirements, the calibration personnel of WIKA customers previously had to utilize many different devices in order to adequately fulfil their tasks. Besides 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 your time and effort necessary 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 also 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. Its powerful data logger and the very large memory capacity support an individual in the subsequent documentation of the on-site calibration. The machine provides all the information relevant for verification.
Note
Detailed information on the model CPH8000 multi-function calibrators can be acquired on the WIKA website. Each instrument has a modular design and will therefore be specified for the respective range of applications. In case you have any more questions, your contact will gladly assist you to.