HIOKI U8991 – Digital Voltmeter Unit for Memory HiCorders
Product information HIOKI U8991 – Digital Voltmeter Unit for Memory HiCorders
The U8991 Digital Voltmeter Unit is a 4-channel digital voltmeter module for the MR8740T memory recorder. It enables highly accurate DC voltage measurement with a resolution of 6.5 digits. The 24-bit module provides four isolated BNC inputs and is suitable for multi-channel measurement of small voltage changes, for example when analyzing very small voltage fluctuations at sensor outputs.
Typical applications include highly precise multi-channel DC voltage measurement as well as analysis of small voltage fluctuations in sensor signals. In combination with the MR8740T, the module can be used in large channel-count systems; a system with 27 U8991 units can acquire up to 108 channels simultaneously.
Technical specifications
- Number of channels / measurement function: 4 (DC voltage measurement)
- Input: isolated BNC terminals, input resistance 100 MΩ or more at 1 V f.s. to 10 V f.s., otherwise 10 MΩ
- Maximum rated voltage to earth / maximum input: 100 V AC/DC; maximum input voltage 100 V DC
- Measurement range: 1, 10, 100 V f.s., 3 ranges
- Sampling rate / resolution: max. 20 ms (50 Samples/s); 1/1,000,000 of measurement range (24-bit delta-sigma modulation A/D)
- Accuracy: basic accuracy ±0.02% rdg. ±0.0025% f.s
- Other product-specific parameters: integration time 20 ms × NPLC (at 50 Hz) or 16.67 ms × NPLC (at 60 Hz)
Compatible memory recorders MR8740T
- U8991 Digital Voltmeter Unit
Dimensions & Packaging
| Length | 196.5 mm |
|---|---|
| Width | 106 mm |
| Height | 19.8 mm |
| Weight | 0.25 kg |
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