Field calibration – Watlow Electric Ramping and Profiling Microprocessor-Based Control SERIES 1500 User Manual
Page 79
Technical Reference
Field Calibration, Appendix
WATLOW Series 1500 User's Manual
79
10. Repeat Steps 5-8 until all the readings are correct with no further adjustments
necessary.
11. Turn power OFF. Set DIP Switch #7 ON (deg. C). Move DVM (+) plus lead to
Signal conditioner connector terminal 11 (terminal 4 for CH-2). Turn power back
ON.
12. Set mV Source as follows, and adjust "Deg. C Lo Pot" for the corresponding
DVM reading. Actual should read the value shown.
Type
mV Source
DVM Reading
Actual Reading
J
-0.885mV, (0
°
F)
-0.028VDC
±
0.003
- 18
°
C
±
3
K
-0.692mV, (0
°
F)
-0.028VDC
±
0.003
- 18
°
C
±
3
R
2.282mV, (550
°
F)
+0.448VDC
±
0.003
287
°
C
±
3
13. Set mV Source as follows, and adjust "Deg. C Hi Pot" for the corresponding
DVM reading. Actual should read the value shown.
Type
mV Source
DVM Reading
Actual Reading
J
39.40mV, (1300
°
F)
1.100VDC
±
0.003
704
°
C 3
K
52.93mV, (2400
°
F)
2.055VDC
±
0.003
1315
°
C
±
3
R
20.28mV, (3100
°
F)
2.662VDC
±
0.003
1704
°
C
±
3
14. Set mV Source as follows. DVM and Actual Readings should be as shown.
Type
mV Source
DVM Reading
Actual Reading
J
17.19mV, (600
°
F)
0.4922VDC
±
0.003
315
°
C
±
3
K
26.97mV, (1200
°
F)
1.014VDC
±
0.003
649
°
C
±
3
R
10.27mV, (1800
°
F)
1.534VDC
±
0.003
982
°
C
±
3
15. Repeat Steps 12-14 until all the readings are correct with no further adjustments
necessary.
16. If calibrating one channel at a time, power-down the Series 1500 and mV Source.
Move the C/J Compensator from the CH-1 connector terminals to the CH-2
terminals, and move the shorting wiring to the CH-1 terminals. Then perform
Steps 6-14 for CH-2.
Steps 10-14 only
required if the deg.
C Analog Output
is used.
NOTE
Field Calibration