User Guide

7
HI 935002 HI 935009
Keyboard Functions:
ON/OFF : turn the meter ON and OFF.
T1/T2 : select the reading channel (T1, T2 or T1-T2).
HOLD : freeze the reading on display. In HI 935009, the frozen
value is also stored in non-volatile memory.
CLR : clear the HI and LO values, reset the relative measurement.
DISP : select Normal, Relative or T1/T2 measuring mode.
ALT (HI 935009 only) : enable the second function keys; the "ALT"
tag turns on to indicate that the second functions are enabled.
Note: The ALT key can be released before pressing the second
function key for 1-hand operation.
ALT/CAL : press and hold for about 5 seconds to enter the
Calibration mode (with reading within ±3°C range).
(ALT +) AOFF : set auto power off delay (8min, 60min, disabled).
(ALT +) °C/°F : change reading units (°C or °F).
(ALT +) MR : recall memorized value.
(ALT +) BL : toggle the backlight ON and OFF.