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Calibration Certificate
This calibration certificate gives an overview of the results obtained during the calibration.

Fluid no:
The fluid position in the instrument where the calibrated fluid is available.

Calibration by comparison:
The device under test has been compared with a calibration standard.

Calibration date:
Date of the calibration.

The traceability of a calibration

VSL:
VSL is the National Metrology Institute of The Netherlands. VSL maintains and develops the Dutch measurement standards.

Bronkhorst Calibration Laboratory (BCL):
BCL maintains the measurement standards of Bronkhorst, which are calibrated by VSL.

Bronkhorst Production:
The calibration standards used in Bronkhorst's production process are calibrated by BCL.

The calibrated instrument.

Type:
Is it a Flow meter or flow controller.

Serial number:
Serial number or order number.

Model number:
Type of instrument (customer model or Bronkhorst model).

Rated accuracy*:
The accuracy of this instrument specified under calibration conditions.

Calibration Standard:
The calibration standard wich is used during the calibration (example: Piston Prover, Rotor Meter, Turbine Meter, Reference Meter, etc.)

Type:
The calibration device wich is used during the calibration, in this example a piston prover.

Serial number:
Serial number of the calibration device.

Certificate no.:
The certificate of the calibration device, which certifies the validity of the calibration standard

Uncertainty:
The reported uncertainty of measurement is based on the standard uncertainty multiplied by a coverage factor k=2.

Customer conditions
Fluid and conditions as indicated by customer.

Fluid:
The fluid (specified by customer)

Flow:
The flow range (specified by customer)

Pressure:
The pressure (specified by customer)

Temperature:
The temperature (specified by customer).

Calibration conditions
The calibration conditions shows under which conditions the instrument is calibrated.

Fluid:
The calibration fluid.

Flow:
The calibration flow range. ( Equivalent flow: calibrated flow equivalent to customer flow)

Pressure:
The calibration pressure.

Temperature:
The temperature during the calibration.

Atm. Pressure:
The atmospheric pressure during the calibration.

Calibration and Conversion Results

Point:
Calibration point

Calibrated flow AiR:
Fluid and flow point used during calibration.

Conversion factor:
A calculation from the reference gas flow rate to customer flow rate.

Customer flow** AiR:
The flow range (ordered by customer) converted from the calibrated flow (see:**)

Output signal:
The output signal flow range (ordered by customer) corresponding to the customer flow.
The analog signal is calculated based on the digital signal.

Calculation Customer Flow:
Calibrated flow • Conversion Factor

Measurement uncertainty of the calibrated flow AiR:
Total measurement uncertainty of the calibrated flow, including the calibration standard and the measurement setup.

Measured deviation:
Maximum measured deviation between the reference flow and the flow indicated by the calibrated instrument over the entire calibrated flow range.

Calibrator
The person who did the calibration.

Date: The date when the certificate was checked.

QC: Quality check by authorized person