Meter Calibration - Mitsubishi Electric 800 Series Instruction Manual

4.4.2

Meter calibration

1.
Outputting the same signal from terminals AM0 and AM1 (Pr.309 = "0 or 10")
START
Connect a DC voltmeter (or DC ammeter) across
terminals AM0 (or terminal AM1) and AMC.
Use Pr.323 (Pr.324) to calibrate the meter
when the voltage (current) input is 0.
Set "21" (reference voltage output) in Pr.306.
Use C1 (Pr.901) to perform adjustment, then set.
END *1
*1 In Pr.306, set the types of the signals to be output. (Refer to
NOTE
• If calibration is performed without setting Pr.306 = "21 (reference voltage output)", terminal AM of the inverter is calibrated.
To calibrate the extended analog output, always set to "21".
• When the plug-in option used was remounted on another inverter, use Pr.323 and Pr.324 to calibrate again.
26
ANALOG OUTPUT
At this time, check that the polarity is correct.
If the meter needle does not indicate zero when the voltage or current
input is at zero, calibrate the meter using Pr.323 AM0 0 V adjustment
or Pr.324 AM1 0 mA adjustment.
At this time, the following analog signal is actually output and deflects the meter.
<Across terminals AM0 and AMC>
Maximum output voltage set previously (factory setting: 10 VDC)
<Across terminals AM1 and AMC>
Maximum output current set previously (factory setting: 20 mADC)
After making adjustment with
press to set.
page 28.)
to deflect the meter to full-scale,