Features and Functions   2
U1241A/U1242A User’s and Service Guide 15
If you are working in a varied environment, where ambient temperature is 
not constant, do the following:
1 Press   for more than one second to enable 0 °C compensation. 
This function allows a quick measurement of the relative temperature. 
2 Avoid contact between the thermocouple probe and the measurement 
surface. 
3 After a constant reading is obtained, press   to set the reading as 
the relative reference temperature.
4 Touch the measurement surface with the thermocouple probe.  
5 Read the display for the relative temperature.
Press  at 
T1T2 (U1242A) 
position to 
enable T2 
function
The T2 temperature measurement is only available for U1242A.
Measuring tips: 
• Clean the measurement surface 
and remember to disable the 
applied power.
• When measuring temperature, move 
the thermocouple along the surface 
until you get the highest/lowest 
temperature reading.
• For quick measurement, use the   
0 °C compensation to see the 
temperature variation of the 
thermocouple sensor. The 0 °C 
compensation assists you in 
measuring relative temperature.