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Need to change the scaling for measurement value on a Powerlogic Meter using register writes
CM3000 Series, CM4000 Series, PM800 Series
Application requiring a change in scaling to measurement where read/write register command can be made through the front display or serial communications.
The scale factors for the Voltmeter, Ammeter, or Wattmeter can be adjusted. This can be done by using the Protected Command Interface in the circuit monitor. You can use a modbus communication tool or make the change from the front panel. Changes may be made to one or multiple scale factor values.
The circuit monitor will reset. The power values will now be displayed on the front panel of the Circuit Monitor with the new scale.
NOTE: The above 5-step procedure can be accomplished with a single Write statement from Control>Diagnostics>Read/Write register window. Example below show how to change the Ammeter and Voltmeter scale factor simultaneously.
|Scale Group||Range||Scale Factor Register|
|A - Ammeter per phase||-2 to 1||3209|
|B - Ammeter Neutral||-2 to 1||3210|
|C - Ammeter Ground||-2 to 1||3211|
|D - Voltmeter||-1 to 2||3212|
|E - Voltmeter Neutral||-1 to 2||3213|
|F - Wattmeter||-3 to 3||3214|
|H - Transient Voltages||0 to 3||3216|
|Scale Factor Definition|
|-3||SCALE BY 0.001|
|-2||SCALE BY 0.01|
|-1||SCALE BY 0.1|
|0||SCALE BY 1.0 (DEFAULT)|
|1||SCALE BY 10.0|
|2||SCALE BY 100|
|3||SCALE BY 1000|
See the attached POWERLOGIC Application Tip document.
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