HTA106
EN – 5
4.3. FUNCTION KEY DESCRIPTION
4.3.1. ON/OFF key
Press the
ON/OFF
key to switch on and off the instrument. The
ON/OFF
key also allows
enabling/disabling the Auto Power OFF function (see § 4.3.6).
4.3.2. HOLD/ key
By pushing
HOLD/
key the value measured by the instrument is frozen on the display
and the symbol “Hold” appears on it. Press the
HOLD/
key again to disable this function
and resume normal operation. Press and hold the
HOLD/
key for at least 1s to
enable/disable the display’s backlight.
4.3.3. MAX MIN key
Press the
MAX
MIN
key permits to detect the Maximum or Minimum values in the “
°C
”,
“
°F
”, “
%RH
”, “
WB
” and “
DP
” functions. The display shows the symbol associated with the
selected function:
“
Max
”
for maximum value and
“
Min
”
for minimum value. Both values are
constantly updated and are displayed cyclically every time the same key is pressed. Long
pressing the
MAX MIN
key allows quitting the function.
4.3.4. WB/DP key
Press the
WB/DP
key to enable/disable the Dew Point (DP) and Wet Bulb (WB)
temperature measurement used in buildings and meteorology applications.
4.3.5. °C and °F keys
Press the
°C
key to select the “Celsius” temperature measurement unit or the
°F
key to
select the “Fahrenheit” temperature unit. The keys are disabled if the function “HOLD” is
activated.
The formulas for the conversion between Celsius and Fahrenheit degrees are:
T [°C] =
1.8
32
-
F]
[
T
or
T [°F] = T [°C] * 1.8 + 32
so:
0°C is equal to 32°F,
100°C is equal to 212°F
4.3.6. Disabling the Auto Power OFF function
The instrument is provided with an Auto Power OFF (APO) feature which automatically
allows switching it off after 15 minutes of idleness, in order to preserve the internal battery.
To disable this feature please follows the steps below:
1. With the instrument on, press and hold the
°C
key
2. Press the
ON/OFF
key. The “ “ symbol (see Fig. 2 – part 10) disappears from display
3. Repeat the same operation of the points 1 and 2 to enable the function again. This
function is automatically restored after each shutdown
