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12 Commissioning
12 Commissioning
12.1 Initialization of 1272, 1273
The instrument sensors must be calibrated prior to commis-
sioning with the adjustment potentiometers. The adjustment
must be carried out with the signal receiver at 20% (= 7.2 mA)
and 80% (= 16.8 mA) volumetric flow, in order to compensate
for the difference between the linear output signal and the
non-linear scaling of the flowmeters.
3
2
1
1. Connect mA-measurement device as specified on the in-
strument sensor.
2. Allow 20% volumetric flow to run through the flowmeter.
3. Press "min" key 1.
ð LED display 2 flashes green, the value has been accep-
ted.
ð LED display 2 goes off.
4. Allow 80% volumetric flow to run through the flowmeter.
5. Press "max" key 3.
ð LED display 2 flashes green, the value has been accep-
ted.
ð LED display 2 lights up green, the product is initialized and
ready for operation.
12.1.1 Resetting the product
3
1
To carry out a reset of the product, press the 1 "min" and 3
"max" keys simultaneously.
The reset is completed when the status LED lights up red.
GEMÜ 127x
24 V
14 / 20
A reset must be performed in the following scenarios and
then the product must be reinitialized:
•
If a user error has occurred when initializing the product.
•
If the initialization result is not satisfactory.
•
If another float/variable area flowmeter is used.
12.2 Commissioning the flowmeter
● Commission the flowmeter (see installation, operating and
maintenance instructions for the flowmeter).
13 Operation
The position of the float during operation is communicated to
the evaluating unit via the relevant electrical output of the in-
strument sensor.
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