WIRING INSTRUCTIONS
■
SCREW TERMINAL
Torque: 0.6 N·m
CHECKING
Open the unit’s outdoor enclosure cover when you conduct
checking of the transmitter. Be sure to close the cover after
the checking is complete.
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 below.
Zero and Span adjustments are located behind the top cover
of the unit. Open the enclosure cover, release the knurled
knobs at the front of the unit and open the top cover.
After the calibration is complete, be sure to close both cov-
ers.
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
■
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.
• 100°C or Wider Span (180°F or Wider Span)
SWITCH
POSITION
0% TEMPERATURE
100% TEMPERATURE
°C
°F
°C
°F
SW1-1
0 – 50
32 – 122
100 – 500
212 – 932
SW1-2
50 – 100
122 – 212
150 – 350
302 – 662
SW1-3
100 – 150
212 – 302
200 – 400
392 – 752
SW1-4
200 – 250
392 – 482
300 – 500
572 – 932
SW1-5
300
572
500
932
SW1-6
-50 – 0
-58 – +32
50 – 350
122 – 662
SW1-7
-100 – -50 -148 – -58 0 – 50
32 – 122
SW1-8
Unused
Unused
SW1-9
Unused
Unused
SW1-10
Unused
Unused
• 50 – 100°C Span (90 – 180°F Span)
SWITCH
POSITION
0% TEMPERATURE
100% TEMPERATURE
°C
°F
°C
°F
SW1-1
0 – 50
32 – 122
50 – 100
122 – 212
SW1-2
50 – 100
122 – 212
100 – 150
212 – 302
SW1-3
100 – 150
212 – 302
150 – 200
302 – 392
SW1-4
Unused
Unused
SW1-5
Unused
Unused
SW1-6
-50 – 0
-58 – +32
0 – 50
32 – 122
SW1-7
-100 – -50
-148 – -58
-50 – 0
-58 – 32
SW1-8
Unused
Unused
SW1-9
Unused
Unused
SW1-10
Unused
Unused
6BR
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-8863 Rev.1 P. 5 / 6