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OPERATION MANUAL

PORTABLE CO METER

2

Eastern Energy Co., Ltd.

40/4 Vitoondumri Rd., Banbueng

Banbueng, Chonburi, Thailand

Tel: 66-3844-6117

[email protected]

www.ete.co.th

Model:

7752
77532
7755
77535

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2
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Summary of Contents for 7752

Page 1: ...OPERATION MANUAL PORTABLE CO METER 2 Eastern Energy Co Ltd 40 4 Vitoondumri Rd Banbueng Banbueng Chonburi Thailand Tel 66 3844 6117 sale ete co th www ete co th Model 7752 77532 7755 77535 ...

Page 2: ...temp and humidity DP WB RH are for models 7755 77535 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 especially on CO2 level and air ventilation become widely applied in public areas such as offices classroom...

Page 3: ...ET 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 off the power supply from batteries The adaptor can t be used as a battery charger When battery voltage gets low a Fig 1 The CO sensor 2 can t work under low voltage so it beeps to indicate failed CO measurement 2 press any key except to ...

Page 4: ... m s CO2 CO2 concentration in ppm Relative humidity in Air temp Dew point Wet bulb temp in o C or F o Symbols Turns on and off the meter Enters setup mode Sets as non sleep mode with SET CAL Esc DP WBT N X M AV Exits setup page mode Enters CO calibration with 2 Enters RH calibration with Freezes the current readings Cancels data hold function Activates or cancels the backlight Selects unit or incr...

Page 5: ... O CO2 Fig 4 Fig 5 TAKING MEASUREMENT O O CO2 Press to switch temp display The lower left display will cycle from air temp dew point temp Fig 4 and wet bulb temp Fig 5 The meter starts measurement when power on and update readings every second In the condition of operating environment change ex from high to low temp it takes 30 sec to respond for CO sensor and 30 minutes for RH 2 NOTE Do not hold ...

Page 6: ...dity on the lower LCD Fig 7 7755 77535 N X M AV O O CO2 Fig 7 In STEL and TWA modes the upper LCD shows the STEL and 8 hours TWA weighted average of CO2 readings for the past 15 minutes The lower LCD are the current AIR DP WB temp and humidity 7755 77535 Fig 8 5 N X M AV BACKLIGHT Hold down for more than 1 sec to activate and cancel backlight function MIN MAX STEL TWA Under normal mode press to se...

Page 7: ...nction hold down and for 2 sec to turn on the meter until n appears NOTE Auto sleep function will be disabled during calibration mode 6 SET AUTO POWER OFF ALARM The meter features audible alarm to give warnings when CO concentration 2 exceeds the limit See P1 0 in setup for setting the alarm threshold It emits beeps Abt 80dB when CO level goes 2 over the set value and stops when any key except was...

Page 8: ...crease Each press tunes and the alarm range is from 100 to 9900ppm 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 to access P3 0 for setting up temp Scale Fig 12 Press enter P3 1 with blinking C or F current set Fig 13 on the lower left LCD To switch press to save the setting or without saving and return to de...

Page 9: ...y weather Wait about 5 minutes until the blinking stops and the calibration is completed automatically and back to normal mode To abort the calibration turn off the meter at any time The meter is calibrated at standard 400ppm CO concentration in factory 2 It s suggested to do manual calibration regularly to maintain good accuracy Note When the accuracy becomes a concern after a long time usage ret...

Page 10: ...ty better to be close to the calibrating value To abort calibration just turn off the meter 7755 77535 RH CALIBRATION CAL Esc DP WBT O O Fig 15 O O Fig 16 O O Fig 17 75 calibration After 33 calibration plug the sensor probe into 75 salt bottle then press to enter 75 calibration Fig 17 N X M AV CAUTION Do not calibrate the humidity without the default calibration salt Otherwise it will cause perman...

Page 11: ... CO sensor damaged 2 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 CO 2 Replace batteries or use an adaptor E11 Retry humidity calibration E17 Retry CO calibration 2 E31 Temperature sensor damaged E34 Humidity sensor damaged Can t power on Press for more than 0 3 sec and try again Check whether batter...

Page 12: ...5001 9999 out of sca le Temp 10 60 C 14 140 F Humidity 0 1 99 9 R H NA Dew point NA 20 0 59 9 C Wet bu lb NA 5 0 59 9 C Resolution 1ppm 0 1 C F 1ppm 0 1 C F 0 1 R H Accuracy CO2 50ppm 5 50ppm 5 30ppm 5 30ppm 5 0 2000ppm 0 2000ppm 0 5000ppm 0 5000ppm Temp 0 6 C 0 9 F Humidity NA 3 RH at 25 C 10 90 RH 5 RH at 25 C others Warm up time 30 seconds Response time CO2 Tair 30 seconds 90 step change 2 mins...

Page 13: ...ted 1000ppm 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 sa...

Page 14: ...ON 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 7721 Wall mount Temp CO2 me...

Page 15: ...Eastern Energy Co Ltd 40 4 Vitoondumri Rd Banbueng Banbueng Chonburi Thailand Tel 66 3844 6117 sale ete co th www ete co th ...

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