# Mitsubishi Electric FR-A820-00046 Instruction Manual Page 719

Parameters
*
When calibration is required
Calibrate detector output and set point input by Pr. 125, C2 (Pr. 902) to C4 (Pr. 903) (terminal 2) or
Pr. 126, C5 (Pr. 904) to C7 (Pr. 905) (terminal 4).
When both C42 (Pr. 934) and C44 (Pr. 935) are other than "9999", calibrate the detector output and
set point input by Pr. 934 and Pr. 935 (terminal 4). (For the details, refer to page 5-401.)
Make calibration in the PU operation mode during an inverter stop.
● Calibrating set point input
Example
To enter the set point on terminal 2
Apply the input (for example, 0 V) of set point setting 0% across terminals 2 and 5.
Using C2 (Pr. 902), enter the frequency (for example, 0 Hz) to be output by the inverter when the
deviation is 0%.
Using C3 (Pr. 902), set the voltage value at 0%.
Apply the input (for example, 5 V) of set point setting 100% across terminals 2 and 5.
Using Pr. 125, enter the frequency (for example, 60 Hz) to be output by the inverter when the
deviation is 100%.
Using C4 (Pr. 903), set the voltage value at 100%.
NOTE
When the set point is set at Pr. 133, the setting frequency of C2 (Pr. 902) is equivalent to 0% and
the setting frequency of Pr. 125 (Pr. 903) is equivalent to 100%.
● Calibrating measured value input
Apply the input (for example, 4 mA) of measured value 0% across terminals 4 and 5.
Perform calibration by C6 (Pr. 904).
Apply the input (for example, 20 mA) of measured value 100% across terminals 4 and 5.
Perform calibration by C7 (Pr. 905).
NOTES
Set the frequencies set at C5 (Pr. 904) and Pr. 126 to each of the same values set at C2 (Pr. 902) and
Pr. 125.
The display unit for analog input can be changed from "%" to "V" or "mA". (Refer to page 5-405.)
● The figure below shows the results of having performed the calibration above.
[Set point setting]
(%)
100
0
0
Fig. 5-267:
FR-A800
(%)
100
0
(V)
5
0
4
Input calibration
[Measured value]
Manipulated variable (Hz)
(mA)
20
(A) Application parameters
[Manipulated variable]
60
0
Deviation (%)
0
100
I002695E, I002696E, I002697E
5 - 539