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7
2.
THE
USER
INTERFACE
The user interface consist of a
backlit LCD graphic display
, and the power-on and setting keys.
When battery powered, and not pressing any key, the backlight turns off after about 1 minute. To
turn it back on, press any key. When using an external power supply, the backlight is always on.
Turn the instrument on and off with the
ON/OFF
key. When you turn the instrument on, the logo
and model will be displayed for a few seconds, and then the main display.
The quantities detected by the instrument can be viewed with a larger character size, at the top of
the display. The parameter displayed with a larger character is called
main quantity
. In order to
select the parameter to be displayed as
main quantity
, use the
▲▼
keys. For some quantities, you
can select the unit of measurement; temperature can be displayed as °C or °F.
2.1
T
HE
D
ISPLAY
HD37AB1347
2010/02/10 08:00:00
Carbon Dioxide
CO
2
ppm
600
CO 0 ppm
RH 25.0 %
T1 17.0 °C
Patm 1000 hPa
Va 0.00 m/s
1.
Battery’s charge status
and
instrument code
. In case the
logging
function is on, this line
shows the current logging number and the time elapsed from logging start.
2.
Main quantity
(in this case, CO
2
Carbon Dioxide).
3.
Display of
all other quantities
.
4.
Current date and time
.
The
detected and computed quantities
are:
CO
2
Carbon Dioxide
ppm
CO
Carbon Monoxide
ppm
RH
Relative Humidity
%
T1
Temperature detected by the probe connected to input 1
°C – °F
Patm
Atmospheric Pressure
hPa
Va
Wind Speed
m/s – km/h – ft/min – mph – knot
FVa
Flow Rate
L/s – m
3
/h – m
3
/min – m
3
/h – ft
3
/s ft
3
/min
T2
Temperature detected by the probe connected to input 2
°C – °F
Td
Dew Point
°C – °F
Tw
Wet Bulb Temperature
°C – °F
AH
Absolute Humidity
g/m
3
r
Mixing Ratio
g/kg
H
Enthalpy
kJ/kg
1
3
4
2
