ABB series V18345-1010221001 TZIDC intelligent electric pneumatic valve

Description

V18345-1010221001 The “Int” units on the HHM configuration screen correspond to actual desired output current

values, in microamps, provided the base terminal jumper corresponds to the module range

configuration. The Int unit values set in the configuration must V18345-1010221001 be within the limits of the range

used. The module will operate with a range-jumper mismatch, but Int units scaling will be invalid.

The “Eng” units are the values supplied by the host.

V18345-1010221001 Field recalibration can be accomplished by forcing the outputs to the “Eng Hi” and/or “Eng Lo”

calibration point values in the module configuration, reading the actual output produced, and

updating the configured values to the actual values. Usually, recalibrating the high point only is

sufficient. If the low point is done, it should be changed from the default value of 0 volts or 4000

microAmps to get better accuracy. The following example shows a two-point calibration for 0 to 10

volts:

1. Set the analog output scaling for 0 to 10 volts output:

Eng lo 100 (mV)

Eng hi 10,000 (mV)

Internal lo 4,160 (corresponds to 100 mV)

Internal hi 20,000 (corresponds to 100 mV)

2. Force the output to the low point value: 100 (= 0.100 volt)
3. Read the output using an accurate meter on the output. For example, you might get a value of

0.107 volts, instead of 100.

4. Force the output to the high point value: 10000 (=10.000 volts)
5. Read the output using an accurate meter on the output. For example, you might get a value of

9.985 volts, instead of 10.000 volts.

6. Change the scaling to the new calibrated values:

Eng lo 107 (reading in mV from step 3)

Eng hi 9985 (reading in mV from step 5)

Internal lo 4160 (microamps to yield voltage in step 2)

Internal hi 20000 (microamps to yield voltage in step 4)

7. V18345-1010221001 The voltage output is now calibrated to your meter, within the approximately 3-millivolt

resolution of the output.

Use the new Eng Hi and Eng Lo values as calibration points when repeating, or go back to step 1

and begin again. The scaling affects both the voltage and current forms of the output point, so only

one can be recalibrated.

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