Minimum (Min) Maximum (Max) Function; Backlight; Automatic Power Off - Extech Instruments RH390-NIST User Manual

Minimum (MIN) Maximum (MAX) Function

The MIN/MAX mode allows the user to view only
the lowest (MIN) or highest (MAX) readings.
Press the MAX/MIN button once and "MAX"
appears on the display. The LCD is now
displaying the maximum humidity in the top
display and the maximum reading of the selected
parameter in the bottom display. The display will
not change until a higher reading is registered.
Press the MAX/MIN button again and "MIN"
appears on the display. The LCD is now
displaying the minimum humidity and the minimum second reading in the bottom display.
The display will not change until a lower reading is registered.
To exit the MIN/MAX mode, press and hold the MIN/MAX button for 2 seconds until the
"MAX" or "MIN" icon disappears.
Note: Readings are automatically reset when switching from one display to the next
(MAX to MIN).

Backlight

Press and hold the light button (
backlight off press and hold the light button (

Automatic Power OFF

The meter has a default setting that automatically shuts the
meter off after 10 minutes (indicated by the
the display. This battery saving feature can be disabled. To
disable the auto power off function, simply press and hold
the hold button
( ) while powering on. The
when auto power off has been disabled. The meter will
revert to the default auto-off mode when powered off.
) until the backlight comes on. To turn the
) until the backlight turns off.
symbol on
symbol will not appear
5
MAX MIN
°C °F
MAX MIN
°C °F
RH390-EU-EN V2.3 07/13