Omega Engineering OMB-CHARTSCAN 1400, Руководство пользователя

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Hardware 3-17
CSN14/LV/ (T, B, & S)
Low Voltage Cards
There are three versions of low voltage signal conditioning cards for use with ChartScan. Each card supports 16
differential input channels and is capable of measuring analog input signals on any of four programmable ranges:
±100 mV, ±1 volt, ±5 volt and ±10 volt. The cards share the same signal conditioning characteristics, but differ in
their style of input connector, i.e., terminal strip, BNC, and safety jack (CSN14/LV/T, CSN14/LV/B and
CSN14/LV/S, respectively).
Number of Inputs: 16 differential; programmable by channel for input range
Input Types: ±10V, ±5V, ±1V, and ±100mV
Input Connectors: Removable screw terminal blocks, BNC, or Safety Jacks
Voltage Range, Accuracy
1
and Resolution:
• ±
100 mV;
±
0.02%; 3.05
µ
V/bit
• ±
1 V;
±
0.02%; 30.5
µ
V/bit
• ±
5 V;
±
0.02%; 153
µ
V/bit
• ± 10 V; ± 0.02%; 306 µ V/bit
Digital Filtering:
Used for AC line cycle noise rejection.
Selectable off, 1-256 samples in a binary count.
Temperature Coefficient:
< (0.1 x rated accuracy)%/°C
Input Impedance: 1M
Ω
typical
Input Bias Current: 20 nA maximum
Common Mode Rejection: 100 dB typical
Maximum Common Mode Voltage:
2
200 VDC, or 200 VAC peak
Maximum Allowable Input:
±
25V rms
Channel-to-Power Ground Isolation: 200 V peak
Channel-to-Channel Isolation: 200V peak