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OPERATING MANUAL HPC & UMC4
5. Commissioning
5.1
Zero point calibration
In order to ensure that precise measurements are obtained, zero point calibration is to be Performed the
first time the device is put into operation
and before any regular operations are carried out. Zero point
calibration is to be performed using a fluid.
The zero calibration procedure is as follows:
Install the sensor as described in the manufacturer’s instructions.
Check to ensure that the sensor is completely filled with fluid and that there are no gas bub-
bles in the flow tubes.
Define the process conditions such as pressure, temperature and density.
Close a potential shut-off device behind the sensor.
Operate the transmitter in accordance with the instructions in Section
on page 57.
Make sure that sufficient time is allowed for the electronics to warm up.
Allowing fluid to flow through the sensor during the zero calibration procedure will skew the
zero point and result in false readings, especially during low flow conditions.
5.2
Startup conditions
The device is not subject to specific startup conditions. However, pressure surges should be avoided.