Watlow Ramping and Profiling Microprocessor-Based Control SERIES 1500 User Manual page 78

Field Calibration
NOTE:
The following
procedure applies
to all three T/C
types, although
the Input/Output
values may differ
between types.
Use the values
corresponding to
78
WATLOW Series 1500 User's Manual
Calibration
1. Document DIP Switch settings and values in Guarded Access, pages 54 & 56.
2. Set Series 1500 DIP Switches 3 & 6 ON, all others OFF.
3. Set mV Source as follows.
Type Setting
J -0.885 mV, (0°F)
K -0.692 mV, (0°F)
R +2.282 mV, (550°F)
4. Connect DVM, (-) minus to Signal Conditioner connector terminal 1 and (+) plus
to test point TP-10 on the Signal Conditioner Board.
5. Power up Series 1500 Control. Will power up in deg. F. Press "CLEAR" to stop
flashing. Allow atleast 15 minutes for the control to stabilize.
6. With mV Source set as follows, adjust "SPAN POT" for 5.000VDC on DVM.
Type Setting
J -0.885 mV, (0°F)
K -0.692 mV, (0°F)
R +2.282 mV, (550°F)
7. Connect DVM, (+) plus to TP100 (TP99 for CH-2) and adjust "Zero Adjust Pot"
for the following DVM reading at TP-100 (TP99 for CH-2). Then verify that Actual
reads as follows.
Type DVM Reading
0.0VDC ± 0.003
J
0.0VDC ± 0.003
K
0.8594VDC ± 0.003
R
8. Set mV Source as follows, and adjust "F.S. POT" for the corresponding DVM
reading. Actual should read the value shown.
Type mV Source
J 39.40mV, (1300°F)
K 52.93mV, (2400°F)
R 20.28mV, (3100°F)
9. Set mV Source as follows. DVM and Actual readings should be as shown.
Type mV Source
J 17.19mV, (600°F)
K 26.97mV, (1200°F)
R 10.27mV, (1800°F)
Technical Reference
bration
Actual Reading
0°F ± 3
0°F ± 3
550°F ± 3
DVM Reading
2.031VDC ± 0.003
3.750VDC ± 0.003
4.884VDC ± 0.003
DVM Reading
0.9375VDC ± 0.005
1.875VDC ± 0.009
2.812VDC ± 0.005
Actual Reading
1300°F ± 3
2400°F ± 3
3100°F ± 3
Actual Reading
600°F ± 5
1200°F ± 6
1800°F ± 5
Field Calibration, Appendix