10 Operation
10.1 Dangers during operation
ATTENTION
Measuring error through incorrectly installed pick ups.
► Ensure that pick ups are installed at the correct position.
► The connecting line of the pick up/temperature sensor connection is to be shielded and laid separ-
ately from the supply lines.
► Ensure that the power supply is correct.
Connect pick ups in accordance with the identification on the flowmeter. Observe the associated
operating instructions for pick ups.
10 Operation
10.1 Dangers during operation
The following safety instructions must be observed strictly:
o Have all work only carried out by authorized qualified personnel.
o Ensure that the flowmeter is only operated within the operating limits.
o Ensure that during cooling down or heating up the flowmeter is only subjected to slow temperat-
ure changes.
o Ensure that existing safety equipment is not bypassed or activated during operation.
10.2 Commissioning
10.2.1 Cleaning the pipe system
Notice Soiling in the pipe system impairs the service life of the flowmeter. In order to protect the flowmeter
against soiling the manufacturer generally recommends the installation of an operating filter.
Notice Through the calibration, the internal components of the flowmeter are wetted with calibration liquid. If
required, use an appropriate solvent to flush the flowmeter.
ATTENTION
Damage to device through usage of an incorrect flushing liquid.
► Under no circumstances may water or superheated steam be used to flush the pipe system.
Flushing via bypass: Close the shut-off devices before and after the flowmeter.
- or -
Flushing via flowmeter: Install the operating filter in front of the flowmeter, while observing the
mesh width of the operating filter, see the following table.
The mesh width of the operating filter is relevant to the size of the flowmeter.
Size of the flowmeter Unit Max. mesh width
OMG-013 – OMG-020 [mm] 0.1
OMG-032 – OMG-140 [mm] 0.25
Tab.9: Mesh width of the operating filter
10.2.2 Checking the function
1. Check the flow direction of the flowmeter.
2. Check the installation and installation position of the pick up and of the temperature sensor.
3. Check leaks at the pipe thread/connecting flange.
4. Check the electrical installation. Observe the operating instructions for pick up and electronic unit.
5. Check the power supply. Observe the operating instructions for pick up and electronic unit.
Operating instructions
OIO 14en-GB Edition 2020-01
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