Commissioning; Calibration - Siemens SITRANS WFS320 Operating Instructions Manual

Commissioning

6.1

Calibration

A Test Weight is a calibration reference used to simulate a material impact force (test rate) on
the flowmeter sensing plate during the integrator span calibration. The test weight is also used to
perform a test to verify that the flowmeter sensing head is level.
The Test Rate should be 60 to 80% of the system design rate.
To determine the test rate produced by a specific test weight, calculate:
Alternatively, to determine the test weight required for a specific test rate, calculate:
Note
*For WF350 flowmeters, use 60 grams (instead of 45 grams) when calculating Test Rate or
Test Weight.
Example
If the test weight used with a WF330 flowmeter is 7000 grams:
Note
Use metric tons per hour (t/h) or short tons per hour (STPH) as applicable for TPH.
SITRANS WFS320
Operating Instructions, 02/2016, A5E32880290-AB
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