Emerson VSG & VSSG Troubleshooting Guide download pdf (Page 42)

VSG/VSSG • Compact Logix PLC Manual •Vilter/Emerson • 35391CL

Instrument Calibration Motor Amps

Confirm the “mA Reading” value (the raw mA value at the analog module) is correct and stable.

If not already done, set the Minimum mA to 4.00. This is the minimum mA expected from the current

transmitter at 0 motor amps.

If not already done, set the Maximum mA to 20.00. This is the maximum mA possible from the current

transmitter.

Set the Minimum Ratio value of the current transformer. Enter a 0 for zero amps.

Set the Maximum Ratio value of the current transformer. For example, if the CT has a 250:5 rating, enter

250 as the Maximum Ratio value.

Set the Offset to zero unless required otherwise. The offset value adds to the resultant linearly scaled value

and results in the Calibrated Value which is used for control.

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Emerson VSG & VSSG Troubleshooting Guide Page 42