West Control Solutions MRC 9000 - Manual (Page 12)

Section 1 1-6 Edition 3
Rev G
INPUTS
Input Types
Thermocouple
Types J, K, T, R, S, E, B, N, G, D, C, Ni/Ni-Moly, and Platinel II.
RTD Platinum 100, 2 or 3 wire
.00385 coefficient DIN 43760/IEC 751
.00392 coefficient USA
.00392 coefficient SAMA
Nickel 100, 2 or 3 wire
Voltage DC 0 to 25mV, 0 to 100 mVDC, 0 to 1 VDC, 0 to 10 VDC
Current DC 0 to 20mA, 4 to 20mA
Internal 50 ohm shunt resistor
Contact Closure Open/closed switch sensing without external voltages or resistors
Impedance 25mV, 100mV, 1 Volt: > 10 meg ohms
10 Volt: > 50 K ohms
mA: 50 ohms
RTD Excitation Current 1 mA
INPUT PERFORMANCE
Measurement Error
±
.025% of measurement span reference accuracy
Cold Junction Compensation Error
±
0.2
°
C @ 25 degrees C
Cold Junction Compensation Rejection 0.04
°
/degree C deviation from 25 degrees C
Linearization Error TCs:
±
0 .25
°
C typical,
±
0.5
°
C worst case with exceptions
RTDs:
±
0.1
°
C typical,
±
0.3
°
C worst case
Ambient Temperature Error
±
0 .01% of span per degree C deviation from 25 degrees C
Factory Calibration Error Refer to the Accuracy Table
Isolation 500 VDC/350 VAC
Common Mode Rejection 120 dB min.
Normal Mode Rejection 100 dB min. @ 60 Hz or greater
Scan Rate The input scan rate is programmable and dependant on the number of active
inputs present. The total scans per second for the instrument is 16 scans/
second, and the instrument can have up to 8 inputs configured.