Endress+Hauser Conducal CLY421, Operating Instructions Manual

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Device description and operation Conducal CLY421
14 Hauser
3.2.6 Comparison measurement
1. Open the medium flow to the flow assembly.
2. Optimize the flow with the regulation valve (Item 6).
Procedure: Close the regulation valve. Now open the regulation valve slowly until the
flow meter (Item 8) is at the upper limit.
3. Switch on the two transmitters. It takes up to 8 seconds until information is displayed
on the transmitter of the calibration kit.
4. In the case of comparison measurement with a bypass: Waiting until the temperature
in the flow assembly has adjusted to match the process temperature (around 30
minutes).
If the temperature difference is < 0.1 °C, you do not need to change any settings on
the transmitter of the calibration kit.
If the temperature difference is > 0.1 °C, set the temperature compensation on both
transmitters to ultrapure water. Setting on transmitter of the calibration kit:
SETUP/Operating mode/Temp.compensation/UPW (NaCl )
Now select the measuring mode again.
5. Vent the flow assembly by unscrewing the sensor of the calibration kit slightly. Tighten
the sensor again as soon as water comes out.
6. Start the measurement.
7. Adjust the process measuring point with the comparison value (see Operating
Instructions of the process transmitter).
8. Disconnect the calibration kit from the power supply.
NOTICE
Water can damage the electrical parts of the calibration kit
‣
Empty the flow assembly completely before you put it back in the case.