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M2DNY

5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201  Fax: +81(6)6659-8510  E-mail: [email protected]

EM-5066  Rev.6  P. 3 / 3

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 

13 – 14 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.

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 1% input and adjust output to 10%.
2) SPAN:  Apply 100% input and adjust output to 100%.
3) Check ZERO adjustment again with 1% 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%, 4%, 
16%, 36%, 64% and 100% input signal.  Check that the out-
put signal for the respective input signal shows 0%, 20%, 
40%, 60%, 80% and 100% within accuracy described in the 
data sheet.  When the output is out of tolerance, recalibrate 
the unit according to the “ADJUSTMENT PROCEDURE” 
explained earlier.

LIGHTNING SURGE PROTECTION

M-System offers a series of lightning surge protector for 
protection against induced lightning surges.  Please contact 
M-System to choose appropriate models.

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