A typical gas calibration begins with a detailed customer application data review and sign-off by lab personnel.
- Select lab, lab piping and accessories to replicate actual installation.
- Install the flowmeter (Device Under Test or DUT), pressurize and leak test the calibration system.
- Charge calibration tunnel with calibration gas or gas mixture.
- Perform preliminary test of calibration standard and data acquisition system.
- Perform zero stability tests and take zero calibration point.
- Collect 12 to 18 calibration flow range data points and an over range point.
- Download collected calibration data to DUT.
- Perform final calibration verification over the entire flow range to ensure calibration parameters have been properly downloaded and that the DUT is performing within the published accuracy specification.
- Download all flow meter calibration data and settings to master and back-up calibration databases.
- Prepare calibration QC documents to record all raw data, parameters and settings and store in master and back-up calibration databases.
- Prepare customer calibration certificate to include raw sensor voltages, flow velocities and flow rates in customer-specified units, standard asset number, reference standard data, gas/gas mixture, and calibration technician signature.
These steps ensure that the customer’s unique calibration needs are being met, quality standards are followed and the calibration data is stored securely.
Applications
