5
OPERATING INSTRUCTIONS
“ ” Power Switch
The “ ” key turns the thermometer on or off. In the SET
mode cannot be powered off. Exit SET mode to power
off.
APO function mode
Press “ ” power key for more than 4 seconds to disable
the auto-power function.
The display will show “
APO OFF
”.
“°C/°F” Selecting the Temperature Scale
Readings are displayed in either degrees Celsius(°C) or
degrees Fahrenheit(°F). When the thermometer is turned
on, it is set to the temperature scale that was in use
when the thermometer was last turned off. To change
the temperature scale, press the “°
C/
°
F
” key.
“
” Button
Press the “
” key to trigger on the backlight function,
press the ”
” key again to cancel the backlight
function. The backlight will switch-off automatically
after 30 seconds.
“REL” Button
Press the “
REL
” key to enter Relative mode, zero the
display, and store the displayed Reading as a reference
value and annunciator REL is displayed. Press “
REL
”
key again to exit the relative mode. In this mode, press
“
HOLD
” key to stop reading, all values are frozen, press
“
HOLD
” key again to restart reading.
“MAX/MIN” Button
Press “
MIN/MAX” key to enter the MIN/MAX recording
mode and REC shows on the display. The beeper emits a
tone when a new minimum or maximum measurement is
recorded. Press “
MIN/MAX
” key again to cycle through