Watlow 8PID Controller - Manual (Page 7)

2
2.0 SPECIFICATIONS
2.1 ANALOG INPUTS
Number of channels: eight
Multiplexing: three wire reed relay, guarded inputs
A/D converter: integrating voltage to frequency
Loop update: each loop 2 times per second
Input isolation: optical coupling
Input resolution: 0.02% full scale
Temp. coefficient: .025% per degree
Measurement accuracy: +0.2% full scale
Thermocouple break: up scale standard
Standard input types: All are present in every system: select by command
from host, any order, any mix:
(a)
Thermocouple ranges: *
J T/C: -50F to 1400F
K T/C: -110F to 2500F
T T/C: -120F to 750F
(b) Voltage and current scaling:
0 to 100% (0 to 50ma, 0 to 10v etc.)
(c) Voltage input ranges, set for each channel:
0 to 60mv min, 0 to 100v max: normal
(d) Current input ranges: select resistor to match
above voltage ranges
Optional input types: E, S, R, or B T/C
RTD
Non-contact
infrared
Temperature Ranges below 0 degrees
* Assumes PID temp is 0 to 50 degrees C
If otherwise, contact factory.
2.2 OPERATING PARAMETERS
Independently set for each loop from computer or programmable controller.
Input type any standard type (see above), any mix
Gain (proportional) 0 to 499
Reset (integral) 0 (off) to 1020 seconds
Rate (derivative) 0 (off) to 255 seconds
Digital Filter 0 to 15 levels [0-7.5 sec.time const.]
Setpoint 0 to span
High alarm 0 to span [requires alarm expander]
Low alarm 0 to span [requires alarm expander]
Control output level automatic, 0-100% or when using manual control 0 to
100% (0.1% resolution). As set from keyboard.