West Control Solutions MRC 8000 - Manual (Page 70)

70
Appendix D Product Specifications
INPUTS
Input Types/Range Type Range
Thermocouple J 0
°
C to 760
°
C 0
°
F to 1400
°
F
K 0
°
C to 1360
°
C 0
°
F to 2500
°
F
T -200
°
C to 400
°
C -330
°
F to 750
°
F
R 200
°
C to 1650
°
C 400
°
F to 3000
°
F
S 200
°
C to 1650
°
C 400
°
F to 3000
°
F
E 0
°
C to 750
°
C 0
°
F to 1400
°
F
B 200
°
C to 1800
°
C 400
°
F to 3300
°
F
N 0
°
C to 1300
°
C 0
°
F to 2370
°
F
C 200
°
C to 2300
°
C 390
°
F to 4170
°
F
RTD 100 ohm Platinum -140
°
C to 400
°
C -220
°
F to 750
°
F
.00385 ohms/ohm/
°
C
Current DC 0 to 20mA, 4 to 20mA
External Shunt Resistor, 2.5 ohms or 250 ohms
Voltage DC 0 to 25mV, 0 to 50mV, 10 to 50mV, 0 to 5 V, 1 to 5 V
Impedance > 100M ohm for TC and mV inputs
100K ohms for 5V inputs
2.5 ohms or 250 ohms for mA inputs
RTD Excitation Current 330 microamps, typical
Input Scan Rate 1 scan per second
Input Correction Offset Adjustment, -999 to 999 units
Remote Setpoint 0 to 5V, 1 to 5V
Sensor Fault Detection Sensor break on all TCs, RTDs, 1volt, 1 to 5 volt, 4-20mA, and millivolt inputs
No sensor break can be detected for zero based Volt and Milliamp ranges
Display goes to “SnSr” and pen goes upscale if a sensor break is detected
Display goes to “Hi” 5% above span
Display goes “Lo” 5% below span
Transmitter Power Supplies One isolated 50mA @ 24VDC supply available
.
INPUT PERFORMANCE
Performance Under Reference Condition:
Measurement Error
Type J, K, T, E, N, C, T/C and RTD:
±
0.25% of span
±
1 degree
Type R, S, B, C, T/Cs:
±
0.25% of span @ 25
°
C
mVDC and VDC:
±
0.25% of scaled span plus 1 least significant digit
Cold Junction Compensation Error
±
0.2
°
C @ 25
°
C
Cold Junction Compensation Rejection 0.04
°
/
°
C deviation from 25
°
C
Linearization Error TCs:
±
0.25
°
C typical,
±
0.5
°
C worst case with expectations
RTDs:
±
0.1
°
C typical,
±
0.3
°
C worst case
Ambient Temperature Error
±
0.01% of span per
°
C deviation from 25
°
C
Common Mode Rejection 90 db minimum; 24VAC maximum for RTD input; 115 VAC maximum all others
for other inputs
Normal Mode Rejection 85 dB minimum @60Hz or greater
Isolation RTD Inputs 24VAC. All other inputs 115VAC
Inputs share a common signal ground
Reference Conditions
Ambient Temperature
25
°
C
Relative Humidity 60 - 70%
Supply Voltage 115 VAC, 60 Hz
Source Resistance < 10 ohms for TC input
Lead Resistance < 0.1 ohm/lead balanced (Pt100)