KAP
EM-3581 Rev.9 P. 3 / 3
MG CO., LTD. www.mgco.jp
5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
CHECKING
1) Terminal wiring: Check that all cables are correctly con-
nected according to the connection diagram.
2) Power input voltage: Check voltage across the terminal
7 – 8 with a multimeter.
3) Input: Check that the input signal is within 0 – 100% of
the full-scale.
4) Output: Check that the load resistance meets the de-
scribed specifications shown below.
OUTPUT LOAD REQUIREMENTS
Open collector 50 V DC @50 mA
AC/DC switch 100 V AC @200 mA (cosø=1)
150 V DC @200 mA (resistive load)
Output pulse width: The pulse width is factory set to a
value, between 500 μsec. and 0.8 sec., at which the duty
ratio becomes 50% of the maximum frequency of a speci-
fied range. If this value lies outside of the adjustable
range, either maximum or minimum selectable value will
be used.
Check the acceptable pulse width of the connected instru-
ment.
ADJUSTMENT PROCEDURE
This unit is calibrated at the factory to meet the ordered
specifications, therefore you usually do not need any cali-
bration.
For matching the signal to a receiving instrument or in case
of regular calibration, adjust the output as explained in the
following.
■ 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 5% input and adjust output to 5%.
2) SPAN: Apply 100% input and adjust output to 100%.
3) Check ZERO adjustment again with 5% 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%, 5%,
25%, 50%, 75% and 100% input signal. Check that the out-
put signal for the respective input signal remains within
accuracy described in the data sheet. When the output is
out of tolerance, recalibrate the unit according to the “AD-
JUSTMENT 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.
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