Description
• Use the DVM Unit MR8990 to measure DC voltages on 2 channels
• High-precision measurement for applications such as investigating minute voltage fluctuations in sensor output
• For use with the Memory HiCorder (MR8741/8740, MR8827 and MR8847A only)
• Unlike standard multi-channel scan-type loggers, these instruments can perform simultaneous sampling
• High accuracy of ±0.01 % and super-high 1.2 million-count resolution • High-speed sampling at 500 samples/s
• Isolated input (channel-to-channel and channel-to-chassis: max. rated voltag to earth of 300 V AC/DC)
■ Basic specifications (Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year) DIGITAL VOLTMETER UNIT
| Measurement functions | Number of channels: 2, for DC voltage measurement |
|---|---|
| Input connectors | Banana input connectors (Input resistance: 100 MΩ or higher with 100 mV f.s. to 10 V f.s. range, otherwise 10 MΩ) Max. rated voltage to earth: 300 V AC or DC (with input isolated from the main unit, the maximum voltage that can be applied between input channel and chassis, and between input channels without damage) |
| Measurement ranges | 100 mV f.s. (5 mV/div): -120.0000 mV to 120.0000 mV, 0.1 μV resolution to 1000 V f.s. (50 V/div): -500.000 V to 500.000 V, 1 mV resolution, 5 ranges |
| Measurement resolution | 1/50 000 of measurement range (using 24 bit ΔΣ modulation A/D) |
| Integration time | 20 ms × NPLC (during 50 Hz), 16.67 ms × NPLC (during 60 Hz) NPLC: 0.1 to 0.9, 1 to 9, 10 to 100 settings |
| Response time | 2 ms + 2 × integration time or less (rise – f.s. → + f.s., fall + f.s. → – f.s.) |
| Basic measurement accuracy | ±0.01% rdg. ±0.0025% f.s. (at range of 1000 mV f.s.) |
| Maximum input voltage | 500 V DC (maximum voltage that can be applied between input connectors without damage) |
| Dimensions and mass | 106 (4.17 in) W ×19.8 (0.78)H × 196.5 (7.74 in)D mm, 260 g (8.8 oz) |
| Accessories | Instruction manual ×1 (For single product shipment only) |
