Ponpe 7798 User manual

OPERATION MANUAL
DESKTOP
CARBON DIOXIDE (CO2)
LOGGER
Model:
7798

INTRODUCTION
Features:
Super large display of CO level, temp.,
2
humidity, date and time.
15 degree tilt angle. Easy to see and
read..
Indoor air quality level
(Good, Normal, Poor) .
.
indication.
Stable NDIR sensor for CO detection
2
Visible and audile CO warning alarm
2
ABC(Automatic Baseline Calibration)
and manual CO calibration.
2
Max. & Min. CO value recall function
2
Data logging up to 15999 points.
Sampling rate from 1 second to 4:59:59.
1
Thank you for purchasing this desktop
CO mo nitor & datalogger. It measures
2
CO level, air temp erature, humi dity and
2
also do datalogging, which is an ideal
instrume nt for indoor air quality (IAQ)
diagnosis and HVAC system performa nce
verification.
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, especially on CO
2
level and air ventilation become widely
applied in public areas such as offices,
classrooms , factories, hospitals, day care
centers and hotels. It is also suggested
in regulations of industrial hygiene in
some countries. (See appendix)

MATERIAL SUPPLIED
Meter
Universal adaptor (5V+10%, >=0.5A)
USB cable
Download software CD
Operation manual
Plain white box
This package contains:
POWER SUPPLY
The meter is powered by an AC adaptor
(5V/0.5A output).
2
LCD DISPLAY
ppm The scale of the value
GOOD is in good level
NORMAL
Air Temp. Air temperature
Humidity % Unit of air relative humidity
oE (C/F) Celsius/Fahrenheit of temp.
Icon of CO2 alarm
NOTE: TWA/STEL/VENT.R/cfm/p/lps% are
vain icons in this model.
CO2
CO2
CO is in normal level
2
POOR CO is in poor level
2
MAX/MIN Maximun/Minimum readings
CO2
concentration
in ppm
Relative
humidity in %
Air temp.
o
in C or F
o
Symbols
o
MAX
MIN
TWA
STEL
CO2
Humi di ty
Air Temp. DP WB
GOOD NORMAL POOR
VENT.R
lps
%
cfm/ p
ppm
Year Month Dat e
Hour Mi n
Real time
clock/
Calendar
AM
PM

3
-Enter setup mode.
-Save and finish settings.
-Exit setup page / mode.
-
-Press to clear the MAX/MIN records.
-Activate MAX, MIN function.
-Select mode or decrease value in
setup.
KEYPAD
OPERATION
Plug the adaptor and the meter turns
on automatically with a short beep. The
LED lit to indicate full power.
If the voltage is too high or low, “ bAt “
will display on LCD and LED will flash.
Please see page14 for trouble shooting.
The LCD will display current CO , temp.,
2
humidity, date and time. The air quality
level is displayed as well (Fig.1).
Fig. 1
POWER ON/OFF
SET
ESC
-Terminate calibration / datalogging
RESET
-Select mode or increase value in setup
-Start data logging
MIN/MAX
+-Enter CO calibration.
2
o
CO2
Humi di ty
Air Temp.
GOOD
ppm
Year Month Date
Hour Mi n
PM
MIN/MAX
+
SET
LOG/

4
TAKING MEASUREMENT
The meter starts taking measurement
after turned on and updates readings
every second. In case of operating
environment changed (ex. From high
to low temp.), it takes 2 mins to get the
response of CO /temp. change and 10
2
minutes for RH change.
NOTE: Do not hold the meter close to
faces in case that exhalation affects
CO levels.
2
Under normal mode, press “ “ to
see the minimum, maximum of each
parameter. Each press of “ “,
it displays MIN, MAX in sequence and
returns to normal mode.
In MIN and MAX modes, it shows the
minimum and maximum readings of
CO on main display and air temp. and
2
humidity on the lower displays. (Fig.2)
In MIN/MAX or normal operation modes,
press and hold “ “ key more than
1 second to clear the minimum and
maximum value and then re-start.
Fig.2
MAX,MIN
MIN/MAX
MIN/MAX
RESET
o
CO2
Humi di ty
Air Temp.
GOOD
ppm
Year Month Date
Hour Mi n
MIN
PM

5
The meter features audible alarm to
give warnings when CO concentration
2
exceeds the limits. Users can set up 2
limits: An limit for alarm threshold that
requires ventilation (See P1.3 in setup
for setting alarm limits) and a lower
limit to stop the ventilation system (See
P1.2 in setup CO2 normal limit).
ALARM
DATA LOGGING
The meter can record readings of CO2
, temperature and humidity for long time
environment monitoring. The memory
capacity is 15999 points. Users can set
up sampling rate from 1 second to 4
hours 59 minutes and 59 seconds
(See SETUP P5.0).
After sampling rate is selected, press
“ LOG/ ” for 2 seconds under normal
mode to start logging. The green LED
light blinks to indicate the logging status
and LCD main display shows the real
time CO2 value and “rEC” in turn. Lower
displays are the real time temperature,
humidity and clock.
To terminate data logging, press “ESC”
for 2 seconds, LED light stops blinking
and main display shows “End” and CO2
reading interchangeably. Hold down
“ESC” for 2 seconds again, and it goes
back to normal measurement mode.
Minimum and Maximum recall is still
working during logging.

6
SETUP
Hold down “ “ under normal mode
more than 3 sec to enter setup mode.
To exit setup, press “ “ in P1.0,
P2.0,P3.0, P4.0, and P5.0 and it returns
to normal mode.
SET
ESC
P1.1 CO GOOD LEVEL
2
When entering setup mode, P1.0 and
“CO2” (Fig.4) are displayed on the LCD.
Press “ “ again to go into P1.1 for
setting CO upper limit of GOOD level.
2
The current set value will be blinking
on LCD(Fig.5).
SET
The fan icon keeps flashing when beeps
are manually shut. It stops only when
readings fall under the lower limit
(Fig.3)
CO2
Humi di ty
Air Temp. DP WB
POOR
ppm
Year Month Date
o
Hour Mi n
Fig.3
PM
It emits beeps(Abt.80dB) with fan icon
on LCD when CO level goes over the
2
upper limit. Beeps can be stopped by
pressing any key or automatically stops
when CO reading falls under lower limit.
2
If the beep is temporarily shut, it will
sound again when readings fall under
lower limit and then go over the upper
limit again, or users can press “ “
for more than 1 second to re-activate it.
RESET

CO2
GOOD
Press “ LOG/ “ to increase or “ “ to
decrease the value. Each press tunes
100 ppm and the alarm range is from 0
to 700ppm.
7
When the preferred value is set, press
“ “ to go into P1.2 (Fig.6 ) for upper
limit setting of NORMAL level and confirm
P1.2 or press “ “ without saving and
return to P1.0.
MIN/MAX
SET
ESC
P1.2 CO NORMAL LEVEL
2
P1.2 is used to set CO upper limit of
2
NORMAL level. The current set value
will be blinking on LCD(Fig.6).
Press “ LOG/ “ to increase or “ “ to
decrease the value. Each press tunes
100 ppm and the alarm range is from
700 to 1000ppm.
When the preferred value is set, press
“ “ to confirm P1.2 and go into P1.3
(Fig.7) for alarm threshold setting. Or,
press “ “ without saving and return
to P1.0.
MIN/MAX
SET
ESC
CO2
CO2
NORMAL
Fig.4 Fig.5
Fig.6

P1.3 CO BEEP ALARM
2
P1.3 is used to set CO alarm threshold.
2
The current set value will be blinking on
LCD(Fig.7) when entering P1.3 page.
Press “LOG/ “ to increase or “ “ to
decrease the value. Each press tunes
100 ppm and the alarm range is from
1000 to 5000ppm.
When the preferred value is set, press
“ “ to confirm P1.3 and go into P1.4
(Fig.8). Or, press “ “ without saving
and return to P1.0.
MIN/MAX
SET
ESC
CAUTION:
It’s suggested to set up alarm value
within specification range that
accuracy is ensured. Out of spec
readings are only for reference and
not suitable to be used as alarm limits.
CO2
Fig.7
8
CO2
Fig.8
Press “ LOG/ “ in P1.0 to access P2.0
for setting up temperature scale(Fig.9).
Press “ “ and it goes into P2.1 with
o o
blinking C or F current set(Fig. 10) on
o
the lower middle display. To switch C
o
or F, press “ LOG/ “ or “ “. Then
press “ “ to save the setting or
press “ “ without saving and return
to P2.0
P2.0 TEMPERATURE SCALE
SET
MIN/MAX
SET
ESC

9
P3.0 REAL TIME CLOCK
Press “ LOG/ “ in P1.0 twice to access
P3.0 for setting up real time clock (Fig.
11). Press “ “ and it goes into P3.1
with blinking year set (Fig.12) on the
lower left display. To change the year,
press “LOG/ “ or “ “. Then press
“ “ to save the setting and then enter
P3.2 or press “ “ without saving and
return to P3.0
SET
MIN/MAX
SET
ESC
Press “ “ in P3.1 to access P3.2 and
current month set will blink. To change
the month, press “ LOG/ “ or “. “.
Then press “ “ to save the setting
and then enter P3.3 or press “ “
without saving and return to P3.0
MIN/MAX
SET
ESC
o
Fig.9 Fig.10
24 hour and 12 hour time displays are
both available in this meter.
SET
Repeat above to finish the setting of
P3.3 (Date),then press “ “ to save
the setting and then enter P3.4 or press
“ “ without saving and return to P3.0
SET
ESC
Year Mo nth Date
Hou r Min
Year Mo nth Date
Hou r Min
Fig.11 Fig.12
While in P3.4, the current time setting
(12 hour or 24 hour) will blink.(Fig.13)
To change the setting, press “ LOG/ “

or “ “. Then press “ “ to save
the setting and then enter P3.5 or press
“ “ without saving and return to P3.0
MIN/MAX SET
ESC
While in P3.5, the current hour setting
will blink(Fig.14). To change the setting,
press“LOG/ “ or “ “. Then press
“ “ to save the setting and then enter
P3.6 or press “ “ without saving and
return to P3.0.
MIN/MAX
SET
ESC
Repeat above step to finish the minute
setting in P3.6.
Year Mo nth Date
Hou r Min
Year Mo nth Date
Hou r Min
Fig.13 Fig.14
10
P4.0 RESET
Press “LOG/ “ in P1.0 three times to
access P4.0 to revert the meter to
defaut status(Fig.15). Press “ “ and
it goes into P4.1 with blinking “ No”
default (Fig.16) on the lower middle
display. To switch the status, press
“ LOG/ “ or “ “. Then press “ “
to save the setting or press “ “
without saving and return to P4.0
SET
MIN/MAX SET
ESC
Fig.15 Fig.16
Choose “Yes”, the meter is reset to the
following defaults:

CO CALIBRATION
2
Parameter Default
P1.1
P1.2
P1.3
P2.1
P4.1
700ppm
1000ppm
1000ppm
oC
No
The meter is calibrated at standard
400ppm CO concentration in factory.
2
It’s suggested to do either ABC or
manual calibration regularly to maintain
good accuracy.
11
P5.0 SAMPLING RATE
Go into P5.0 for setting sampling rate
of data logging(Fig.17). The range is
from 1 second to 4 hours 59 minutes
and 59 seconds. Press “ “ and it
goes into P5.1 with blinking Hour digits
on the lower left display. To change the
digit, press “LOG/ “ to increase and
“ “ to decrease. Press “ “ to
enter P5.2 for Minute setting and P5.3
for Second setting (Fig.18). Press “ “
to confirm the rate setting or “ “
without saving and return to P5.0.
SET
MIN/MAX SET
SET
ESC
Fig.17 Fig.18
Year Mo nth Date
Hou r Min
Year Mo nth Date
Hou r Min
Note:
When the accuracy becomes a concern
after a long time usage or other special
conditions, return to dealers for standard
P5.0

fresh air and sunny day where CO level
2
is around 400 ppm.
level in air.
2
The manual calibration is suggested to
be done outdoor with good ventilation,
Do not calibrate in
rainy day because high humidity will
affect the CO
Manual Calibration
12
ABC (Automatic Baseline Calibration)
ABC (Automatic Baseline Calibration)
is to implement baseline calibration to
eliminate the zero drift of the infrared
sensor. The ABC function is always
“ON” when turning on the meter.
ABC is to calibrate the meter at the
minimum CO reading detected during
2
7.5 days continuous monitoring (power
on). It is supposed that the ventilating
area exists fresh air with CO level
2
around 400ppm during a period of
time. it’s not suitable to use desktop
CO2 in close area with higher CO level
2
always such as: 24 hours’ field /
places with windows shut.
Do not calibrate in places crowded with
people or close to where exist high CO2
concentration such as ventilating
outlets or fireplaces.
CAUTION:
Do not calibrate the meter in the
air with unknown CO level.
2
Otherwise, it will be taken as 400
ppm and leads to inaccurate
measurements.
calibration.

Wait about 30 minutes until the blinking
stops and the calibration is completed
automatically and return to normal
mode.
To abort the calibration, press “ “
for more than 1 second.
13
RESET
Note:
Keep away from any animal, human or
plant which might affect the CO2 con-
centration during the calibration.
RH CALIBRATION
This humidity accuracy of this desktop
CO2 meter can be re-calibrated.
Please contact the distributor where
you buy this meter from to purchase the
calibration tooling and request operation
manual.
o
CO2
Humidit y
Air Temp.
ppm
Year Mont h Date
Hou r Min
Fig.19
Note:
It is suggested to operate humidity
calibration by well-trained technician.
Place the meter in the calibration site.
Turn on the meter and hold down “ “
,"LOG/ " and “ “ simultaneously
more than 1 second to enter CO
2
calibration mode (Fig.19). 400ppm and
“CO2” are blinking on the LCD while
performing calibration.
SET
MIN/MAX

PC CONNECTION
Connect the logger to PC, users can do
logging setting and data transmission
with the included software.
Plug the USB cable into the socket at
the rear side of the logger and the other
port to PC. Then install the software in
your PC with the following procedure.
1.Insert the CD Rom and run installation.
Select a preferred directory and click
“Next” step by step and finish it.
2. After the software installation is
completed, it will run USB driver
installation next.
14

15
Software Operation
Start the software and it will detect
logger connection automatically and
indicate the COM Port information at
the bottom of the main screen as well
as the COMPort setting column.
Logger Settings
To set up logging plan, click “Setting”
icon and select “Logger”. The setting
page is opened.
Users can set up the sample rate in 2
ways of either “total seconds” or “hour:
minute: second” format. The other two
settings are for logger identifier and to
synchronize the time in logger and PC.
Click OK for each setting and Exit the
screen to confirm the settings.
AutoConnect

Data Transmission
To transmit recorded data from the
logger, click “Download” icon on the left
top side of the main screen. All data in
the logger will be transmitted. The raw
data with time stamp will display at the
lower part of the screen and the graph
in the middle.
In the Graph display, the Y-axis indicates
Temp, RH and CO2 level in different line
colors. And the X-axis can be switched
to show Time or Recorded No. Stamp.
Data Review Function
The following functions help to view
the GRAPH data in more detailed way.
Under View function, there are 4 tools
to enlarge the Graph data for detailed
data review.
Zoom in: Hold down “Ctrl” key on the PC
keyboard and click any target point on the
graph. It enlarges the point in each click.
16

17
Zoom Xaxis: Hold down “Ctrl” key and
drag click the left button of the mouse to
select an area on the Graph and the
X-axis of the selected area will be
enlarged.
Zoom Yaxis: Hold down “Ctrl” key and
drag click the left button of the mouse to
select an area on the Graph and the
Y-axis of the selected area will be
enlarged.
Three icons on the right top side of the
main screen:
Redraw: After any review and zooming
on the Graph, click “Redraw” to reset it
to original format.
Clear: Click “Clear” to delete all data
and Graph on the window. A warning
box shows up for confirmation. Press
“Yes” and all data will be cleared.
Cursor: Switch Cursor ON and it shows
the raw data with the cursor. In any click
on the graph, the digital data displayed.
Switch OFF to disable the function.
Zoom window: Hold down “Ctrl” key and
drag click the left button of the mouse to
select an area on the Graph and the
selected area will be enlarged .

18
Data Processing
The downloaded data can be Saved or
Printed via “File” processing functions.
Load: To retrieve saved files, just click
“Load” and select a desired file and it
will be loaded in the main screen with
the file details at the left top side.
Compare: The function enables cross
comparison of two recorded data. Load
one file in the main screen first, and
then click “Compare”. The 2nd file will
be loaded in the Graph section for cross
comparison. There will be 6 color lines
for data indication.

19
? Can’t power on
1. Check whether the adaptor is well
plugged.
2. Use a needle or toothpick to stab the
RESET hole at the meter bottom.
TROUBLESHOOTING
? "BAt” and green LED keep flashing
The adaptor output voltage is too high or
too low. Please use the adaptor with
correct 5V(+10%), >=0.5A.
? Reading no change
Check whether the meter is in maximum
or minimum mode.
.
? Error Code
oo
CO2
Hum id ityHum id ity
Air Tem p. Air Tem p.
ppm
Year Year Mont h Mont h DateDate
Hour Hour Min Min
CO2
Hum id ityHum id ity
Air Tem p.
GOOD
ppm
Year Year Mont h Mont h DateDate
Hour Hour Min Min
Fig.A Fig.B
CO2
Hum id ity
Air Tem p.Air Tem p.
GOOD
ppm
Year Year Mont h Mont h DateDate
Hour Hour Min Min Fig.C
Error Code Problem Solution
CO2 Reading (See example of Fig. A)
E01 CO2 sensor is damaged Send back for repair
E02 CO2 reading is under the
lower limit
Re-calibrate the CO2，if it still
appear, send back for repair
E03 CO2 reading is above the
upper limit
Put the meter in fresh air and wait
for 5minutes, if it still appear,
re-calibrate the meter. If above two
methods are failed, send back for
repair
E17 ABC mode of CO2 senor
is failed and might cause
wrong CO2 readings
Send back for repair