
U1401B Quick Start Guide
Performing Temperature Measurements
• Before measuring the temperature of a circuit or device,
disconnect its power.
• The bead type thermocouple probe is suitable for
measuring temperature from –40 °C to 204 °C in Teflon
compatible environments. The probes may emit toxic
gas above this temperature range.
1 Set the slide switch to the M position to
disable the output.
2 Set the rotary switch to mV.
3 Press and hold for more than 1
second.
4 Plug the thermocouple probe (with
adapter) into the INPUT terminals.
5 Touch the surface to be measured with the
thermocouple probe and read the display.
Best practices:
• Do not bend the thermocouple leads at
sharp angles. Repeated bending may break
the leads.
• Do not immerse the thermocouple probe in
any liquid.
• Clean the surface to be measured and
make sure that the probe is securely
touching the surface.
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