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Calibrating the analog output
Description
● The calibration is performed so as to obtain 4mA and 20mA when the analog signal (4-20mA DC) output is 0% and 100%,
respectively.
● Connect an ammeter to AO terminals as shown below. In the CURRENT CALIBRATION mode, select 4mA or 20mA, and operate the
key (UP) or the
key (Down).
● Destination analog output: AO: between terminal board (19 to 20)
For actual keying, refer to the typical operation indicated below. Set the protection to OFF beforehand. (See Section 4.4.1.)
Operation
Adjust the 4mA and 20mA analog outputs.
(example)
Key operation
Press the
▼
Press the
ENT
▼
Press the
▼
Press the
ENT
▼
Adjust the output to 4mA by the
observing the output of calibration devices such as an ammeter.
Press the
ENT
▼
――― 4mA adjustment result has been registered. ―――
Press the
▼
Press the
ENT
▼
Adjust the output to 20mA by the
Press the
ENT
▼
――― 20mA adjustment result has been completed. ―――
Press the
ESC
measurement mode.
4.11. Maintenance mode
Description
key for 4 times to display "MAINTENANCE MODE".
key once to display "RAS".
ENT
key twice to display "AO CURRENT".
key twice to enter the calibration mode of 4mA output.
ENT
(UP) and the
key once to register the adjustment result.
ENT
key once, and select 20mA.
key twice to enter the calibration mode of 20mA output.
ENT
(UP) and the
key once to register the adjustment result.
ENT
key twice and then press the
ESC
(down) key, while
(down) key.
key once to enter the
－79－
Display
MAINTENANCE MODE
RAS 0000H
0000000000000000
AO CURRENT
CARIBRATION
AO CALIBRATION
AO CALIBRATION
COMPLETE
↓
AO CARIBRATION
AO CARIBRATION
AO CARIBRATION
AO CARIBRATION
COMPLETE
↓
AO CARIBRATION
0.000
%
0.000
m3
4 mA
4 mA
20mA
20mA
20mA
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