Super Systems DAQ - Manual (Page 13)

Super Systems Inc. Page 13 of 34 DAQ Operations Manual
Thermocouple Connections
Thermocouple wires can be connected directly to the terminal blocks. The thermocouple
junctions should not be grounded. If they do touch a ground reference, all thermocouples on a
board must have a common ground reference. If multiple thermocouples are connected to
different ground reference points, the accuracy of all thermocouples on the board cannot be
guaranteed to be accurate. When setting up a voltage input signal, such as a thermocouple
input or any voltage input signal up to 1.28 volts, the jumper must be placed on the pins in the
1:1 setup (left diagram).
Voltage Connections
Voltages from 0 mV to 10 Volts DC can be directly connected to the terminal blocks. When
measuring ground-referenced voltages, all references must share a common ground
reference. If the voltage sources are connected to different ground reference points, the
accuracy of all the voltage sources connected to the board need to be checked for accuracy.
Since higher voltages can damage the input board, any voltage input signals, such as a vacuum
gauge, must have the jumpers placed on the pins in the 10:1 setup (middle diagram). This will
ensure that any signal going into the board will be scaled down so it will not damage the input
board.