3
3. Adjustment
The output current has been adjusted before shipment at the factory. Under ordinary
conditions, no adjustment is required.
For adjustment, there are two adjustment controls located on the option board.
The output current adjustment mode, to specify the target current, is available.
Caution: When adjusting, use an insulator to avoid the option board from touching the panel.
Adjustment controls
SPAN control ........... Changes the span of 4mA to 20mA.
Turning the control clockwise will
make the span greater.
ZERO control ........... Changes 4mA current output. Turning
the control clockwise will make the
output current greater.
Output current adjustment mode
1. Remove the power cord. Refer to "1. Installation" to pull the option board out far enough to
access the adjustment controls and insulate the board. Then, reconnect the power cord to the
indicator.
2. Turn the display off. While holding down the MODE key, press the OPR/STB key.
f-00
1
appears on the display.
3. Press the MODE key to display
r-
xxx
1
.(XXX = numbers)
4. Press the M+ key to display
CHeCk
1
.
5. Press the key. All the display segments illuminate
6. Press the MODE key three times to display
70000
1
.
7. While holding down the PRESET TARE key, press the OPR/STB key.
an
001
appears on the
display.
8. Press the key to display
an
x
1
. (X = output current value)
9. Use the following keys to change the output current value.
Using an ammeter, make an adjustment using the two adjustment controls so that the
displayed value is obtained.
key to switch the output current value between 4mA and 20mA.
key to increase the output current value by 2mA in the range of 2mA to 22mA.
10. When adjustment is complete, press the MODE key. Then, press the OPR/STB key to turn the
display off. Remove the power cord. Install the option board as before.
SPAN control
ZERO control
Insulator
AD-4329A-07
option board
