Measurement Computing TempScan/1100 - Manual (Page 58)

3-10 Scanning Cards 889897 TempScan / MultiScan User's Manual
MHV/24 High-Voltage Scanning Card
MHV/24 Specifications
Note: These specifications are subject to change without notice.
Number of Inputs: 24 differential; programmable by channel for any input range
Input Connectors: Screw Terminal.
Voltage Range, Accuracy and Resolution: Range is based on maximum peak-to-peak signal for AC volts.
Accuracy is based on AC voltages where the frequency of the input signal is an integer multiple of the
AC line cycle
± 1.0%, and with line-cycle integration enabled.
Range Accuracy Resolution
± 2.5 V; ± 0.02% of range; 78.14 µV/bit
± 25 V; ± 0.02% of range; 781.4 µV/bit
± 250 V; ± 0.02% of range; 7.81 mV/bit
Digital Filtering: Averages 32 samples @ 50/60 Hz for line cycle noise rejection (DCV measurements).
Temperature Coefficient:
< 0.01%/°C.
Input Impedance: 10 MOhm typical.
Input Bias Current: 20 pA maximum.
Maximum Common Mode Voltage: 500 VDC or AC peak. Specified for coupling impedance > 30
MOhm, and common mode frequency < 60 Hz. Maximum 700 VDC or AC peak before equipment
damage occurs. Maximum 325 VDC or AC peak if used in the same system with the MTC/24 scanning
module.
Maximum Normal Mode Voltage: 500 VDC or AC peak.
Common Mode Rejection: 100 dB typical.
Maximum Allowable Input: 400 VDC.
Channel to Power Ground Isolation: 500 V peak.
Channel to Channel Isolation: 500 V peak. Maximum 325 VDC or AC peak if used in the same system
with the MTC/24 scanning module.
MHV/24 Description
The MHV/24 high-voltage scanning card contains 24 differential input channels and can measure analog
input signals on any one of the following three programmable voltage ranges: ±2.5V, ±25V, and ±250V.