Ponpe 7798, Operation Manual

Page 1: ...OPERATION MANUAL DESKTOP CARBON DIOXIDE CO2 LOGGER Model 7798 ...

Page 2: ...chasing this desktop CO monitor datalogger It measures 2 CO level air temperature humidity and 2 also do datalogging which is an ideal instrument for indoor air quality IAQ diagnosis and HVAC system performance 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 ...

Page 3: ...emp Air temperature Humidity Unit of air relative humidity o E 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 Humidity Air Temp DP WB GOOD NORMAL ...

Page 4: ...cate 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...

Page 5: ...ts 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 ma...

Page 6: ...oints 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...

Page 7: ...T The fan icon keeps flashing when beeps are manually shut It stops only when readings fall under the lower limit Fig 3 CO2 Humidity Air Temp DP WB POOR ppm Year Month Date o Hour Min 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...

Page 8: ...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 savi...

Page 9: ...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 mid...

Page 10: ... 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...

Page 11: ... ESC Repeat above step to finish the minute setting in P3 6 Year Month Date Hour Min Year Month Date Hour 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 sav...

Page 12: ... 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 Month Date Hour Min Ye...

Page 13: ...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...

Page 14: ...is 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 Humidity Air Temp ppm Year Month Date Hour 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 simultaneous...

Page 15: ...nto 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 ...

Page 16: ...etting 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 ...

Page 17: ...le 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 ...

Page 18: ...e 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 f...

Page 19: ...ct 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 ...

Page 20: ... Humidity Air Temp GOOD ppm Year Year Month Month Date Date Hour Hour Min Min Fig A Fig B CO2 Humidity Air Temp Air Temp GOOD ppm Year Year Month Month Date Date 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 ...

Page 21: ...r send back for repair E34 RH sensor or measuring circuit is failed Send back for repair SPECIFICATION 20 Measuring Range CO2 0 9999ppm AirTemp 10 o C 60 o C 14 o F 140 o F AirRH 5 0 RH 95 0 RH Resolution CO2 1ppm Air temp 0 1o C 0 1o F AirRH 0 1 RH Accuracy CO2 50ppm 5 of reading Air temp 0 6o C 1 0o F AirRH 3 RH at 25 o C 10 90 RH 5 RH at 25 o C 10 90 RH Response CO2 2mins 90 stepchange Air temp...

Page 22: ...ATION OTHER RELATED PRODUCTS Authorization must be obtained from the supplier before returning items for any reason When requiring a RA Return Authorization please include data regarding the defective reason the meters are to be returned along with good packing to prevent any damage in delivery and insured against possible damage or loss Other related CO products 2 a Model 7752 portable Temp CO me...

Page 23: ... 1000 ppm indicates inadequate ventilation complaints such as headaches fatigue and eye throat irritation will be more widespread 1000 ppm should be used as an upper limit for indoor levels Non Enforced Reference levels Regulatory exposure limit ASHRAE Standard 62 1989 1000ppm CO2 concentration in occupied building should not exceed 1000ppm Building bulletin 101 BB101 UK standards for schools say ...

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