Oppermann Regelgeräte CO2-TEMP-HMG User manual

Sensors PG1 | Data sheet No. 14108 | Version 11-2018 | 1| 4
CO2/ humidity and hand-held temperature
measuring device CO2-TEMP(-RH)-HMG
Technical data
Power supply: 4 x AA batteries (included)
Measuring range:
Temperature: 0 – 50 °C (accuracy ± 0.5 °C)
Humidity: 0 – 95 % RH (version -RH only)
(accuracy ± 3 % at 25 °C
and 10 – 90 % RH, otherwise ± 5 %)
CO2:0 – 5,000 ppm (version -RH only)
(accuracy ± 30 ppm and ± 5 % of reading)
0 – 2,000 ppm (standard version)
(accuracy ± 75 ppm and ± 5 % of reading)
Output: RS 232 data interface
Perm. Ambient
conditions: 0 – 50 °C, 0 – 95 % RH
(non-condensing)
Housing: plastic ABS / PC
Dimensions: 70 x 210 x 58 mm (L x W x D)
Weight: about 180g (without batteries)
Introduction
Thank you for purchasing this portable CO2meter. The meter
measures CO2level, air temp., dew point, wet bulb temp. and
humidity (DP, WB, RH are for model version RH) and is an ideal
instrument for indoor air quality (IAQ) diagnosis.
Poor indoor air quality is considered unhealthy because it
causes tiredness, loss of ability to concentrate, and even illness
(ex. Sick Building Syndrome). IAQ monitoring and survey, espe-
cially on CO2level and air ventilation become widely applied in
public areas such as oces, classrooms, factories, hospitals and
hotels. It is also suggested in regulations of industrial hygiene in
some countries.
The portable CO2meter uses NDIR (non-dispersive infrared)
technology to ensure the reliability and long term stability. It’s
useful in verifying HVAC system performance and air ventilation
control.
Material supplied
This package contains:
Meter, 4pcs AA batteries, Operation manual, Hard carrying case
Power supply
The meter is powered by either 4 AA batteries or a DC adaptor
(9V/1A output).
Install the batteries into the battery compartment on the rear
and make sure they are in correct polarity and good contact.
When an adaptor is used, it will cut o the power supply from
batteries. The adaptor can’t be used as a battery charger.
When battery voltage gets low, and “Lob”will appear on
the LCD (Fig.1). And beeper sounds. The CO2sensor can’t work
under low voltage, so it beeps to indicate failed CO2mea-
surement (press any key but to stop the beeps) and the
readings won’t be displayed. Please replace with fresh batteries
or connect with an adaptor.
Features:
• Triple displays of CO2level, temp. and
humidity (version -RH)
• NDIR sensor for CO2detection
• Statistics of weighted averages
• TWA (8 hours weighted average)
•STEL (15 minutes weighted average)
• Backlight for working in dark area
• Audible CO2warning alarm
• Battery and adaptor power supply
• Easy manual calibration on CO2
version -RH

CO2/humidity and hand-held temperature measuring device CO2-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
oE (C/F) Celsius/Fahrenheit
Keypad
Turns on and o the meter. Enters setup mode. Sets as
non-sleep mode with .
Exits setup page / mode. Enters CO2calibration 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
nishes settings.
Operation
Power ON/OFF
Press to turn the meter on and o. 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 CO2, 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 CO2sensor and 30 minutes for RH.
Note:
Do not hold the meter close to faces because exhalation aects
CO2levels.
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 CO2on 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 CO2readings 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

Sensors PG1 | Data sheet No. 14108 | Version 11-2018 | 3| 4
CO2/humidity and hand-held temperature measuring device CO2-TEMP(-RH)-HMG
Note:
1. If the meter is turned on for shorter than 15 minutes, the STEL
value will be the weighted average of readings taken since
power on. Same for TWA values appear before 8 hours.
2. It takes at least 5 minutes to calculate STEL and TWA. The
display shows“----”(Fig. 9) during the rst 5 minutes from
power on.
3. While all readings are held unchanged, STEL and TWA will
keep updating every 5 minutes.
Alarm
The meter features audible alarm to give warnings when CO2
concentration exceeds the limit. (See P1.0 in setup for setting
alarm threshold). It emits beeps (about 80 dB) when CO2level
goes over the set value and stops when any key (but ) was
pressed or readings fall below the set value. It beeps again
when value goes over the limit. Restart the meter if beeper can‘t
be stopped.
Auto power OFF
The meter turns o automatically after 20 minutes of inactivity.
To override the function, hold down and for 2 seconds
to turn on the meter until“n” appears.
Note:
Auto sleep function will be disabled during calibration mode.
Setup
Hold down under normal mode for more than 1 sec to
enter setup mode. To exit setup, press in P1.0 or P3.0 and it
returns to normal mode.
Note:
P2.0 is not applicable in these models but for future model with
CO and CO2measurement.
P1.0 CO2alarm
When entering setup mode, P1.0 and“AL” (Fig.10) are displayed
on the LCD. Press to go into P1.1 for setting CO2alarm
threshold. The current set value will be blinking on LCD (Fig. 11).
CO2calibration
The meter defaults to be calibrated manually in the ambient air
where CO2concentration is around 400 ppm.
Caution:
Do not calibrate the meter in the air with unknown CO2concen-
tration. Otherwise, it will be calibrated as 400 ppm by default
and leads to inaccurate measurements.
Calibration site
It is suggested to calibrate the CO2sensor in fresh outdoor
air that is well ventilated and better in sunny weather. Do not
calibrate the meter in places crowded with people or close to
where with high CO2concentration such as ventilating outlets
or replaces.
Procedure
Place the meter in the calibration site. Turn on the meter and
hold down and simultaneously to enter CO2calibra-
tion mode (Fig. 14). 400 ppm and“CAL” are blinking on the LCD
while performing calibration.
Wait about 10 minutes until the blinking stops and the calibra-
tion is completed automatically and back to normal mode. To
abort the calibration, turn o the meter at any time.
Note:
Ensure the batteries are with full voltage during the calibration
to prevent from interruption or failed calibration.
Press to increase the value or to decrease. Each press
tunes 100 ppm and the alarm range is from 100 to 9900 ppm.
When the preferred alarm value is set, press to save the
setting or without saving and return to P1.0.
P3.0 temperature scale
Press or in P1.0 to access P3.0 for setting up tempera-
ture scale (Fig. 12). Press and it goes into P3.1 with blinking
C or ºF current set (Fig. 13) on the lower left display. To switch
ºC or F, press and . Then press to save the setting
or without saving and return to P3.0.

4| 4| Sensors PG1 | Data sheet No. 14108 | Version 11-2018 Specications subject to change.
CO2/humidity and hand-held temperature measuring device CO2-TEMP(-RH)-HMG
Oppermann Regelgeräte GmbH | Im Spitzhau 1 | 70771 Leinfelden-Echterdingen, Germany
Phone [phone] | Fax [phone] | inf[email protected] |www.oprg.de
Troubleshooting
Can’t power on
Press for more than 0.3 seconds and try again. Check
whether batteries are in good contact and correct polarity, or
the adaptor is well plugged.
Fixed readings
Check whether data hold function was activated. (HOLD icon at
the left top)
Slow response
Check whether the air ow channels on the rear were blocked.
Error messages
E01: CO2sensor damaged.
E02: The value is under range.
E03: The value is over range.
E04: The original data error results in this error (DP, WB)
E07: Too low voltage to measure CO2. Replace batteries or use
an adaptor.
E17: Retry CO2calibration.
E31: Temperature sensor damaged.
E34: Humidity sensor damaged.