background image

TERMINAL CONNECTIONS

Connect the unit as in the diagram below.

 

EXTERNAL DIMENSIONS  unit: mm (inch)

I/O PINS

17.5 (.69)

48 (1.89)

75 (2.95)

83 (3.27)

 

CONNECTION DIAGRAM

+

Installation Base

OUTPUT 1

6

7

8

9

10

11

+

+

OUTPUT 2

POWER

3

1

2

4

D

A

B

C

LOAD

SOURCE

k

l

CT

L

K

CT PROTECTOR

model: CTR

Be sure to use the CTR included in the package.
Turning the CT on without connecting the CTR will open the circuit.

CHECKING

1) Terminal wiring:  Check that all cables are correctly con-

nected according to the connection diagram.  Check that 

the CT Protector (CTR) is connected on the base termi-

nal.

2) Power input:  Check the power input voltage.
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.
(Output 1 and Output 2 are linked.)

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

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

M8CT

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-5482  Rev.6  P. 2 / 2

Отзывы: