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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 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.

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.)

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

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.

The fluid (specified by customer)

The flow range (specified by customer)

The pressure (specified by customer)
for which the instrument is calibrated for

The temperature (specified by customer)
for which the instrument is calibrated for.
Calibration conditions
The calibration conditions shows under which conditions the instrument is calibrated.

The calibration fluid.

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

The calibration pressure.

The temperature during the calibration.

Atm. Pressure:
The atmospheric pressure during the calibration.
Calibration and Conversion Results

Output signal:
The output signal of the instrument corresponding to the customer flow.

Customer flow:
The flow rate under the conditions as ordered by the customer.

Equivalent flow:
The flow rate under calibration conditions, which is equivalent to the customer flow rate under customer conditions.

Reference flow:
The flow rate as indicated by the calibration standard.

Measured deviation:
Difference between the flow rates as indicated by the instrument and the calibration standard.

Measurement uncertainty:
Total measurement uncertainty of the flow rate under calibration conditions, including the calibration standard and the measurement set-up.
Visualisation of the measured deviation and the rated accuracy of the calibrated instrument.
The person who did the calibration.

QC: Quality check by authorized person

Date: The date when the certificate was checked.