2 Making Measurements
70 Keysight U1251B and U1252B User’s and Service Guide
Measuring Temperature
The bead type thermocouple probe is suitable for making temperature
measurements between –20 °C to 200 °C in PTFE compatible environments.
Do not use the bead-type thermocouple probe beyond the recommended
operating temperature range. Do not immerse this thermocouple probe in liquids.
For best results, use a thermocouple probe designed for each application — an
immersion probe for liquid or gel and an air probe for air measurements.
Set up the multimeter to measure temperature as shown in Figure 2-15 or
observe the following steps:
1 Press to select the temperature measurement.
2 Connect the miniture thermal probe into the non-compensation transfer
adapter as shown in Figure 2-13.
3 Connect the thermal probe with the adapter into the meter input terminals as
shown in Figure 2-14.
4 For best performance, place the meter in the operating environment for at
least one hour to stabilize the unit to environment temperatures.
5 Clean the measurement surface and make sure the probe is securely touching
the surface. Remember to disable the applied power.
6 When measuring above the ambient temperature, move the thermocouple
along the surface until you get the highest temperature reading.
7 When measuring below ambient temperature, move the thermocouple along
the surface until you get the lowest temperature reading.
CAUTION
Do not bend the thermocouple leads at sharp angles. Repeated bending
over a period of time may break the leads.
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