Connecting Voltage Inputs To Rtd Channels; Connecting Voltage Inputs To High Voltage Channels; Inputs - Data Translation TEMPpoint DT9871U User Manual

Chapter 4

Connecting Voltage Inputs to RTD Channels

Figure 13
instrument.
Note: On the standard DT9874 instrument, channels 16 to 31 correspond to the RTD input
channels.
The input impedance is well over 100 MΩ using the voltage –Sense and +Sense inputs.
For best accuracy when connecting voltage inputs, use twisted-pair wires with a dead-ended
shield connected to pin 4 of the screw terminal block.

Connecting Voltage Inputs to High Voltage Channels

Each DT9873 and DT9874 contains pluggable screw terminals for connecting high voltage

inputs.

Note: On the standard DT9874 instrument, channels 32 to 47 correspond to the high voltage
input channels.
Figure 14
50
shows how to connect a voltage input to an RTD channel on a DT9872 or DT9874
4
Figure 13: Connecting Voltage Inputs to an RTD Channel
shows the numbering of the screw terminal blocks for high voltage connections.
RTD Channel
– Sense +Sense
3 2
Shield
Vin – Vin +
1