Description
DMM Station MR8990 High Precision Measurement System
The DMM Station MR8990 is a high performance DC voltage measurement system designed to work exclusively with the MR8740 and MR8741 Memory HiCorder platforms. When combined, this system provides simultaneous, multi channel voltage measurement that captures extremely small fluctuations often missed by traditional scan type data loggers.
Simultaneous Multi Channel Sampling
Unlike conventional multi channel instruments that scan channels sequentially, the DMM Station MR8990 enables true simultaneous sampling. This capability is critical when analyzing correlated signals such as sensor outputs in automotive systems or voltage variations in battery cells. The system supports installation of multiple DVM units, allowing data capture from up to 32 channels at the same time without timing skew.
Accuracy and Resolution Advantage
At the core of the system is the MR8990 DVM Unit, which provides two channels of DC voltage measurement with exceptional accuracy. With a basic accuracy of ±0.01 percent and a super high resolution of 1.2 million counts, the system reliably captures microvolt level changes. This level of precision makes it ideal for investigating subtle performance shifts in sensors, electronic components, and energy storage devices.
Speed and Isolation Performance
The DMM Station MR8990 supports high speed sampling at up to 500 samples per second, enabling real time monitoring of dynamic voltage changes. Each channel is electrically isolated from other channels and from the chassis, with a maximum rated voltage to earth of 300 V AC or DC. This isolation ensures safe measurement and minimizes noise interference in high density measurement environments.
System Integration and Expandability
The MR8740 and MR8741 main units provide flexible channel expansion, large internal memory capacity, and LAN and USB connectivity for data transfer and system control. With removable USB storage and support for external displays via DVI output, the system integrates smoothly into laboratory setups, automotive test benches, and industrial evaluation environments.
Specifications Table
| Specification | Details |
| Product Name | DMM Station MR8990 with MR8740 / MR8741 |
| Measurement Type | DC Voltage |
| DVM Unit | MR8990 |
| Channels per DVM Unit | 2 |
| Maximum System Channels | Up to 32 |
| Measurement Accuracy | ±0.01 percent of reading |
| Resolution | 1.2 million counts |
| Sampling Rate | Up to 500 samples per second |
| Input Isolation | Channel to channel and channel to chassis |
| Max Input Voltage | 500 V DC |
| Max Rated Voltage to Earth | 300 V AC or DC |
| Compatible Main Units | MR8740, MR8741 |
| Memory Capacity | MR8740: 864 MW total, MR8741: 256 MW total |
| Interfaces | LAN, USB |
| Display Output | DVI |
| Power Supply | 100 to 240 V AC |
| Mounting Style | Rack mountable |
| Included Accessories | Power cord, instruction manual, application software |
| Notes | MR8990 cannot operate as a standalone unit |
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