Specifications, Appendix – Watlow Series 922 User Manual
Page 68
68
WATLOW Series 922 User's Manual
Appendix
Specifications
Specifications
Control Mode
•
Microprocessor-based, user selectable modes.
•
Dual inputs, dual control outputs per channel.
•
8 event outputs/1 event input/1 remote hold input.
•
99 step programmer with up to 10 profiles.
•
Control outputs: User selectable as: Heat/Cool, Cool/Heat.
•
Outputs independent, or related via deadband for Heat/Cool.
•
ON/OFF: 3
°
F or 1.7
°
C switching hysteresis or 0.3
°
F or 0.17
°
C for 0.1
°
Units .
•
PID parameters per channel:
Proportional band: 0 to 500
°
C or 0 to 50.0
°
C for 0.1
°
Units.
Reset: 0.00 to 5.00 repeats per minute.
Rate: 0.00 to 5.00 minutes.
Rate band: 0 to 7 times proportional band.
Cycle time: 1 to 60 seconds.
•
Deadband:
±
36
°
F,
±
20
°
C or Units
±
2.0
°
C for 0.1
°
Units.
•
Auxiliary outputs: User selectable as:
• Events 1 & 2 selectable as alarms for Channels 1 & 2.
• Process or deviation value, per output.
• Alarms, latching or non-latching. When non-latching, control will have
3
°
F/1.7
°
C switching hysteresis or 0.3
°
F/0.17
°
C for 0.1
°
Units.
• Separate high and low values, per output.
Operator Interface
•
Membrane front panel.
•
Four digit 1/2" LEDs displaying actual process input value.
•
LED indication of
°
C,
°
F, or process variable units.
•
MODE, ENTER, UP, DOWN, and RUN/HOLD keys.
•
Eight character alphanumeric display of operating data.
Input
•
Thermocouple, RTD and electrical process input.
•
Automatic cold junction compensation for thermocouple.
•
RTD input 2 or 3 wire, platinum, 100 ohm @ 0
°
C, calibrated to JIS curve
#3916 (0.003916
Ω
/
Ω
/
°
C), DIN curve #3850 (0.003850
Ω
/
Ω
/
°
C).
•
Sensor break protection de-energizes control outputs to protect system.
•
Ungrounded sensors required..
•
Operating ranges user selectable.
J t/c:
32 to 1382
°
F
or
0
to
750
°
C
K t/c:
-328 to 2282
°
F
or -200
to 1250
°
C
T t/c:
-328 to
662
°
F
or -200
to
350
°
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:
-99 to 1800 units
4-20mA:
-99 to 1800 units
RH, 0-5VDC: 0 to 100% RH Vaisala sensor
•
Calibration offset or input signal,
±
90
°
F,
±
50
°
C,
±
50 PVU's, front panel
adjustable 9.0
°
F,
±
5.0
°
C for 0.1
°
C Units.
•
°
F,
°
C, or process variable units are user selectable.
Appendix