UEi Test Instruments DT222 - Manual (Page 6)

(1) POWER ON/OFF
(2) SLEEP MODE (AUTO POWER OFF)
(3) SET THERMOCOUPLE TYPE
4
Note:
Make sure you have plugged in the thermocouple probe before
turning on. Press and hold PWR button to turn on the meter.
While the meter is on, press PWR button to turn off the meter.
The meter will turn off automatically after 60 minutes if no
buttons are pressed. To disable auto power off function, when
the meter is off, press and hold “HOLD” button then press
“PWR” button to turn on the meter, the primary LCD shows the
following. Sleep mode is now disabled.
Verify thermocouple type matches the probe being used.
K-type = Yellow molded plug
J-type = Black molded plug
Press and hold “SET” to switch type.
OPERATION