TERMINAL CONNECTIONS
Connect the unit as in the diagram below or refer to the connection diagram on the top of the unit.
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EXTERNAL DIMENSIONS unit: mm (inch)
76 (2.99) dia.
40 (1.57)
52.5 (2.07)
1 (.04)
60.9 (2.40)
46 (1.81)
50 (1.97)
4–M3 (.12) TAP
6 (.24) deep
1 2 3 4
5 6
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CONNECTION DIAGRAM
1
2
A
B
B
RTD
3
5
6
+
–
LOAD
OUTPUT
24V DC
4 – 20mA DC
WIRING INSTRUCTIONS
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SCREW TERMINAL
Torque: 0.6 N·m
CHECKING
1) Terminal wiring: Check that all cables are correctly con-
nected according to the connection diagram.
2) Input: Check voltage across the terminal 1 – 2 with a
sensitive voltmeter (With 20°C or 68°F, approx. 220mV
with Pt 100, approx. 110mV with Pt 50Ω).
If RTD wires are broken, the output goes over 100% (be-
low 0% with downscale) due to burnout function. Check
leadwires in such a case.
3) Output: Check that the load is within the permissible
limit including wiring resistance.
Load Resistance (Ω) =
Supply Voltage (V) – 13 (V)
0.02 (A)
(including leadwire resistance)
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. Zero and Span adjustments are located behind
the top cover. Release the knurled knobs and open the cover.
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PREPARATION
1) Loosen Screw (A) on top and open the covering.
A
A
1
2
3
4
5
6
SW1
SW3
VR4
VR5
VR1
VR2
SW2
VR3
SW4
SW1 : 0% Input Adjustment
SW2 : 100% Input Adjustment (coarse)
SW3 : 100% Input Adjustment (fine)
SW4 : Span Selector
VR1 : Output Zero Adjustment
VR2 : Output Span Adjustment
VR3 : Cancelling RTD Resistance
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0% TEMPERATURE ADJUSTMENT
1) Adjust SW1 to appropriate position according to Table
below.
Check also that 100% temperature to be adjusted is with-
in the available range in the right column of the table.
(The available range means that for which M-System
guarantees ±0.2% accuracy.)
2) Connect a digital voltmeter across the terminal 1 (+) – 4
(–).
3) With minimum (0%) input, adjust output reading to 0
±0.001V with VR3.
6R
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-4213 Rev.6 P. 2 / 3
