CO
2
/ humidity and hand-held temperature measuring device CO
2
-TEMP(-RH)-HMG
2
|
4
| Sensors PG1 | Data sheet No. 14108 | Version 11-2018
LCD display
Symbols
TWA
Time weighted average (8 hours)
STEL
Short-term exposure limit
(15 minutes weighted average)
HOLD
Readings are freezed unchanged
MIN/MAX
Minimum/Maximun readings
Low battery indicator
DP
Dew point temperature (version -RH)
AIR
Air temperature
WBT
Wet bulb temperature (version -RH)
%
Unit of relative humidity
o
E (C/F)
Celsius/Fahrenheit
Keypad
Turns on and off the meter. Enters setup mode. Sets as
non-sleep mode with
.
Exits setup page / mode. Enters CO
2
calibration with
.
Freezes the current readings. Cancels data hold function.
Activates or cancels the backlight. Selects unit or
increases value in setup.
Selects AIR, DP, WBT temps display. (version -RH only)
Selects unit or decreases value in setup.
Activates MIN, MAX, STEL, TWA function. Saves and
finishes settings.
Operation
Power ON/OFF
Press
to turn the meter on and off. At power up, it emits
a short beep and performs 30 seconds countdown (Fig. 2) for
meter warm up, then enters normal mode with current CO
2
, tem-
peratures, and humidity (version -RH) readings displayed (Fig. 3).
Taking measurement
The meter starts measurement when power on and update
readings every second. In the condition of operating environ-
ment change (ex. from high to low temp.), it takes 30 sec to
respond for CO
2
sensor and 30 minutes for RH.
Note:
Do not hold the meter close to faces because exhalation affects
CO
2
levels.
AIR (all models), DP, WBT (version -RH)
Press
to switch temperatures display. The lower left display
will cycle from air temperature, dew point temp. (Fig. 4), and
wet bulb temp. (Fig.5).
Data hold
Press
to freeze the readings, “HOLD” icon is displayed
on the left top of LCD (Fig.6). All current readings are kept
unchanged, except STEL and TWA. Press
again to cancel
the hold function.
Backlight
Hold down
for more than 1 second to activate and cancel
backlight function.
MIN, MAX, STEL, TWA
Under normal mode, press
to see the minimum, maximum,
and weighted average readings. Each press of
, it displays
MIN, MAX, STEL, TWA in sequence and returns to normal mode.
In MIN and MAX modes, it shows the minimum and maximum
readings of CO
2
on main display and of AIR or Dp or WB tempera-
tures and humidity (version -RH) on the lower displays. (Fig. 7)
In STEL and TWA modes, the main display shows the weighted
average of CO
2
readings for the past 15 minutes (STEL) and 8
hours (TWA). The lower displays are the current AIR, DP/WB
temperatures and humidity (version -RH). (Fig. 8)
version -RH
