©2003 DELMHORST INSTRUMENT CO.
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To activate the backlight, tap the ON/OFF button. Tap the ON/OFF button again to
turn off the backlight.
LOW BATTERY:
A “low battery” indication will appear on the display when voltage is no longer
sufficient. Immediately replace the battery (9V Alkaline only). Typical battery life is
approximately 55 hours (without backlight).
ADJUSTING THE DISPLAY CONTRAST:
The display contrast is preset in the system memory at an optimal level. Under most
operating conditions, no further adjustment should be necessary. However, if the
meter is operated in extreme temperature conditions, some adjustment may be
desirable for optimal viewing quality.
Procedure:
1. Ensure the meter is not in HOLD mode. Press and hold the ON/OFF button.
Keep it pressed throughout the adjustment process.
2. To turn the display darker, press and hold the SCALE (F/C) button within 2
seconds. Release this button when desired contrast is achieved.
3. To turn the display lighter, press and hold the ROTATE button within 2 seconds.
Release the button when the desired contrast is achieved.
4. Once the desired contrast is achieved, release the ON/OFF button within 2
seconds.
OPERATION SUMMARY:
On/Off
(Hold)
Hold Rotate Scale On/Off
(Tap)
On/Off
+
Scale
On/Off
+
Rotate
Turns
meter ON
and OFF if
held for
longer
than 2
seconds
Places
meter in
HOLD
mode:
current
data is
held, all
data is
available
for display
Alternates
between
T/RH and
D/AH data
set
displayed
on screen
Alternates
between F
and C
scales for
Temp. and
Dew Point
readings
Alternates
the state
of the
backlight
Contrast
adj – turns
display
darker.
Contrast
adj– turns
display
lighter.
