Temperature; Data Hold; Minimum (Min) Maximum (Max) Function; Backlight - Extech Instruments RH490-NIST User Manual

Temperature

1. To select the temperature measurement, press the
"°F/°C/WBT/Dew Point" button until "°C" or "°F" appears in the
lower right.
2. Temperature is now displayed.

Data Hold

1.
Press the "H MAX MIN" button momentarily to freeze the displayed
readings. "HOLD" will appear on the upper left-hand side of the
display.
2.
Press the "H MAX MIN" button three more times to return to normal
operation. (Steps through MAX and MIN)

Minimum (MIN) Maximum (MAX) Function

The MIN/MAX mode allows the user to view only the lowest (MIN) or highest (MAX) readings.
1.
Press the "H MAX MIN" button twice and "MIN" appears on the display. The LCD is now
displaying the minimum value recorded in both the top and bottom display. The display will not
change until a lower reading is registered.
2.
Press the "H MAX MIN" button again and "MAX" appears on the
display. The LCD is now displaying the maximum value recorded
in both the top and bottom display. The display will not change
until a higher reading is registered.
3.
To exit the MIN/MAX mode, press the "H MAX MIN" button again.
The "MAX" icon will disappear.
Note: Max and Min values are recorded into memory while the meter is
on. The values are erased when power is turned off.

Backlight

Press and hold the light button "
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 symbol on the display).
This battery saving feature can be disabled.
To disable the auto power off function, press and hold the "H MAX MIN" hold button while powering
on. The symbol will not appear when auto power off has been disabled.
The meter will revert to the default auto-off mode when powered off.
" until the backlight turns on. To turn the backlight off, press and
" until the backlight turns off.
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RH490-EU-EN-V2.2-07/13