GW Instek GDM-350B - Manual (Page 25)

MEASUREMENT OPERATION
23
1. Turn the rotary switch to the “˚C” position.
2. Put the multi-purpose socket into the correct terminal.
3. The K-type thermocouple can only be used for measurements below 230˚C, if
you want to measure over 230˚C, you need to buy another type of
thermocouple.
4. When the LCD displays “1”, it indicates that the K-type thermocouple is not
connected. When the ˚C terminal and the COM terminal are shorted, the meter
will show the room temperature.
Warning:
 Keep the thermocouple clean to prevent the contact point from having any
serious influence on measurements.
 Remove the contact point after temperature measurement and store in good
condition.