TERMINAL CONNECTIONS
Connect the unit as in the diagram below.
■
EXTERNAL DIMENSIONS unit: mm [inch]
14.0 [.55]
39.2 [1.54]
50.5 [1.99]
1.3 [.05]
■
CONNECTION DIAGRAM
1
2
9
10
3
4
6
8
5
7
Installation Base
A
B
C
–
+
OUTPUT
–
POWER
+
Note: Use shielded cables for I/O wiring.
3
2
1
POTENTIOMETER
max.
min.
+
–
CHECKING
1) Terminal wiring: Check that all cables are correctly con-
nected according to the connection diagram.
2) Power input: Check the power input voltage.
3) Input: Check voltage across the terminal B (+) – C (–)
with a voltmeter to show 0V at 0% potentiometer input
and the same voltage as that across A (+) – C (–) at 100%
input.
4) Output: Check that the load resistance meets the de-
scribed specifications.
ADJUSTMENT PROCEDURE
This unit is calibrated at the factory with the total resist-
ance input, therefore you do not need any calibration if you
use the potentiometer’s total resistance.
When you do not use the total resistance or in case of regu-
lar calibration, adjust the output as explained in the fol-
lowing.
■
HOW TO CALIBRATE THE OUTPUT SIGNAL
Use a signal source and measuring instruments of sufficient
accuracy level. Turn the power supply on and warm up for
more than 10 minutes.
1) ZERO: Apply 0% input and adjust output to 0%.
2) SPAN: Apply 100% input and adjust output to 100%.
3) Check ZERO adjustment again with 0% input.
4) When ZERO value is changed, repeat the above proce-
dure 1) – 3).
MAINTENANCE
Regular calibration procedure is explained below:
■
CALIBRATION
Warm up the unit for at least 10 minutes. Apply 0%, 25%,
50%, 75% and 100% input signal. Check that the output
signal for the respective input signal remains within accu-
racy described in the data sheet. When the output is out of
tolerance, recalibrate the unit according to the “ADJUST-
MENT PROCEDURE” explained earlier.
LIGHTNING SURGE PROTECTION
We offer a series of lightning surge protector for protec-
tion against induced lightning surges. Please contact us to
choose appropriate models.
M80MS
EM-5406 Rev.1 P. 2 / 2
MG CO., LTD. www.mgco.jp
5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
