User Manual

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2.11 Notes on Measurement
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WARNING
In order to avoid accidents from electric shock, before
removing or replacing an input module, check that the
connection cords and thermocouple are disconnected, turn
off the power, and remove the power cord.
To avoid the danger of electric shock, never operate the
instrument with an input module removed. To use the
instrument after removing an input module, install a blank
panel over the opening of the removed module.
CAUTION
When making measurements on an AC power line for example,
using a voltage transformer, be sure to connect the voltage
transformer ground terminal to ground.
AC DC DC+AC
0V
+400 V DC
-400 V DC
Difference between "370 V AC, DC" and "400 V DC max."
indication
370 V AC, DC: RMS value is displayed.
400 V DC max.: Instantaneous value is displayed.
The maximum input voltage (400 V DC max.) is defined as the
superposition of DC component and AC peak, as shown in the figure below.