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New ethernet measurement instruments

18 November 2011

Data Translation announced the release of two new Ethernet (LXI) measurement instruments for their MEASUREpoint product line

Featuring 24-bit A/D resolution and ISO-Channel technology, the new DT8875 and DT8876 instruments provide ultra-high galvanic isolation channel-to-channel and to earth ground of ±1400 V or ±3500 V and up to 5000 V for transients, depending on the model.

This makes them particularly ideal for test applications in high voltage noise environments, for precise temperature or voltage measurements on high-performance batteries or inverters, for example. The measurement instruments are available with up to 20 or 40 analog inputs for connecting voltages, thermocouples, RTDs or currents.

External influences such as common mode noise or ground loops can create substantial problems for measurement systems. In most standard measurement instruments, the inputs are referenced to one common ground potential, making it very difficult to meet higher demands on accuracy.

The ISO-Channel technology developed by Data Translation, which is also included in the new DT8875 and DT8876 systems, protects the measurement signals from noise and transients. Each input channel is galvanically isolated from the other channels. This ensures complete channel-to-channel isolation of up to 7000 V in the DT8876 model.

The new measurement instruments can be provided with different 4-channel or
8-channel analog input modules to allow flexible configuration. The choice includes boards for direct connection of B, E, J, K, N, R, S and T thermocouples with a resolution of up to 0.0004 °C and boards for RTD connection (2-wire, 3-wire or
4-wire Pt100, Pt500, Pt1000).

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