Watlow Electric Micro-Based Autotuning Control SERIES 980/985 - Manual (Page 34)

Appendix
Control Mode
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Single set point, non-ramping.
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Single input, dual outputs.
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Control outputs: User selectable as: Heat, Heat/Heat, Heat/Cool, Cool,
Cool/Cool, Heat/Alarm, Cool/Alarm
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Outputs independent, or related via deadband for Heat/Cool.
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ON/OFF: 3°F or 1 .7°C switching hysteresis or 0.3°F or 0.l7°C for
0.10 Units
.
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PID parameters:
Proportional band: 0 to 999°F/0 to 555°C(3 digit only)
0 to 999°F/0 to 555°C or 0 to 99.9°F/0 to 55.5°C (3 or 4 digit)
Reset: 0.00 to 9.99 repeats per minute.
Rate: 0.00 to 9.99 minutes.
Cycle time: 1 to 60 seconds.
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Deadband: ±99°F, ±99 units or ±55°C
±9.9°F, ±9.9 units or ±5.5°C for 0.1 decimal units)
Operator Interface
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Membrane front panel.
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Three or four digit 0.3” (8mm) LED diiplays.
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MODE, AUTO/MANUAL, UP, and DOWN keys.
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Dual digital displays.
Input
Thermocouple, RTD, and electrical process input.
Automatic cold junction compensation for thermocouple.
RTD input 2 or 3 wire, platinum, 100 ohm @ 0°C user selectable, calibrate
to JIS curve #3916 (0.003916(0.003916ohm/ohm/°C or DIN curve #3850(0.003850ohm/ohm°C
Sensor break protection de-energizes control output to protect system or
selectable bumpless transfer to manual operation.
Grounded or ungrounded sensors.
°F/°C or process variable units are user selectable.
Operating ranges user selectable.
J t/c: 32 to 999°F or 0 to 750°C (3 Digit)
32 to 1382°F or 0 to 750°C (4 Digit)
K t/c: - 3 2 8 t o 2282°F or -200 to 1250°C
T t/c: -328 to 662°F or -200 to 350°C
N t/c: 32 to 2282°F or 0 t o 1250°C
PT 2 (Platinel2) 32 to 2543°F or 0 t o 1395°C
1° RTD: -328 to 1112°F or -200 to 600°C
0.1° RTD: -99.9 to 392.0°F or -99.9 to 200.0°C
0-5VDC: -500 to 3500 units
4-20mA: -500 to 3500 units
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WATLOW Series 980/985 User’s Manual Appendix