8 PARAMETER FUNCTIONS
8-66
Pr. 901 "AM terminal calibration"
Using the operation panel or parameter unit, you can calibrate the full scale of a meter connected to
the AM instrument connection terminal.
The terminal AM outputs a 10VDC voltage at the value set in Pr. 55 or 56. When the full scale of the
used meter must be calibrated, it can be adjusted using Pr. 901.
<Calibration example>
Connect a 10VDC voltmeter having a full-scale graduation
"10" and adjust it to deflect to the graduation "8" at the
motor current 8A.
10VDC voltmeter
0
8
10
<Calibration procedure using operation panel>
1) Set "8" in Pr. 56 and "21" in Pr. 158.
2) Confirm that the (+) terminal of the meter is connected to terminal AM and the (-) terminal to
terminal 5.
3) Set the operation mode to the PU operation mode.
4) Set the running speed.
5) Press the
SET key.
6) Read Pr. 901.
7) Press the
FWD or
REV
key to start operation. You need not connect the motor.
8) Using the
key, make adjustment until the meter deflects to the graduation "8". Holding
down the
key decreases the voltage applied to the voltmeter. The key increases the
voltage.
9) Press the
SET key until Pr. 901 flickers. (About 2s)
10) Press the
STOP/RESET
key to stop operation.
11) Set 2 in Pr. 158.
MEMO
When calibrating an item which cannot provide a 100% value easily by operation,
e.g. motor current, set "21" in Pr. 158, perform calibration operation, and after
completion of the calibration, set the selected display data value ("2" for motor
current") in Pr. 158.
For the calibration method using the parameter unit (FR-PU04), refer to the FR-
PU04 instruction manual.
You can also calibrate the meter for external operation. Set the frequency in the
external operation mode and make calibration in accordance with steps 6) to 10).
You can also make calibration during operation.
Holding down the
key increases the voltage to about 13.5V.
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