User Manual

2.2 Connecting the Cables
18
For voltage measurement, be sure to read "2.2.1 Connection Preparations" (⇒ p. 16) before
connecting.
About Connections and Inputs
When measuring temperature
2.2.3 Connecting to the Model 8937 Voltage/Temp
Unit
Input module
Model
8937 Voltage/Temp Unit
Maximum Input Voltage (⇒ p. 4)
Voltage Measurement:
Any of the following connects to a BNC jack on an input
module.
Temperature Measurement:
Connect the thermocouple to the terminal block.
(Recommended cables (⇒ p. 19))
• Model 9198 Connection Cord
Maximum input voltage:
300 V (small alligator clips)
• Model 9217 Connection Cord
Maximum input voltage:
300 V (for BNC output)
If the voltage to be measured exceeds the maximum input
rating of the input module being used:
• Model 9322 Differential Probe(⇒ p. 31) *
∗ The Model 9418-15 AC Adapter option
is required for connection (
⇒ p. 33).
The ground (GND) sides of the voltage and temperature inputs for each channel
are common. Do not connect and apply both voltage and temperature inputs at
the same time. The measurement object could be damaged.
Voltage and temperature cannot both be measured simultaneously on one chan-
nel.
Observe the following to avoid electric shock.
• When measuring temperature with an uninsulated thermocouple at a
point that has a non-zero electric potential, be careful to avoid touching
the input module’s terminal block. The terminals may have voltage
present.
• The voltage and temperature inputs are electrically isolated from one
another.
• The push-button terminals on the Model 8937 Voltage/Temp Unit are for ther-
mocouples only. Do not connect anything except a specified thermocouple
(type K, J, E, T, N, R, S or B).
• Use a tool (screwdriver) to connect and disconnect thermocouples.
• Confirm the polarity of a thermocouple before connection. Correct values are
not displayed if the thermocouple is connected with reverse polarity.