Omega CN8EPt - Specifications; Inputs; Control

PLATINUM
TM
Series Controllers User’s Guide
M5451 Omega Engineering | www.omega.com
73
Specifications
9. Specifications
9.1 Inputs
Input Types
Thermocouple, RTD, Thermistor, Analog Voltage, Analog Current
Current Input
4 to 20 mA, 0 to 24 mA Scalable
Voltage Input
-50 to + 50 mV, -100 to 100 mV, -1 to 1 V, -10 to 10 Vdc Single Ended Scalable
+/- 50 and +/- 100 mV differential and ratiometric inputs, scalable
Thermocouple Input
(ITS 90)
K, J, T, E, R, S, B, C, N
RTD Input (ITS 90)
100/500/1000 Ω Pt sensor, 2-, 3- or 4-wire; 0.00385 (100 Ω only), 0.00392
(100 Ω only), or 0.003916 (100 Ω only) curves
Configuration
Differential
Polarity
Bipolar
Accuracy
Refer to Table 8
Resolution
0.1°F/°C temperature; 10 µV process
Input Impedances
Process Voltage: 10 MΩ for +/- 100 mV
Process Voltage: 1 MΩ for other voltage ranges
Process Current: 5 Ω
Thermocouple: 10 KΩ max
Temperature
Stability
 RTD: 0.04°C/°C
 TC at 25°C (77°F): 0.05°C/°C (cold junction compensation)
 Process: 50 ppm/°C
A/D Conversion
24 bit Sigma Delta
Reading Rate
20 samples per second
Digital Filter
Programmable from 0.05 seconds (filter = 1) to 6.4 seconds (filter = 128)
CMRR
120 dB
Excitation
Firmware selectable (no jumpers to set) to 5, 10, 12, and 24 Vdc @ 25 mA
Setpoint Adjustment
-9999 to +9999 counts
Warm Up to Rated
Accuracy
30 min
9.2 Control
Action
Reverse (heat), direct (cool), or heat / cool
Autotune
Operator initiated from front panel
Adaptive Tune
User selectable; fuzzy logic continuous PID tuning optimization
Control Modes
On/off or the following time/amplitude Proportional Control Modes:
selectable Manual or Auto PID, Proportional, Proportional with Integral,
Proportional with Derivative
Cycle Time
0.1–199 seconds