General CDM77535 User Manual Download Page 1

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CDM77535

USER’S MANUAL

Digital CO

Environmental Meter

INTRODUCTION

Thank you for purchasing this portable CO

meter. The meter

measures CO

level, air temperature, dew point, wet bulb temperature

and humidity and is an ideal instrument for indoor air quality (IAQ)
diagnosis.

CDM775355-final-092508:Layout 1 9/25/08 10:11 AM Page 1

Summary of Contents for CDM77535

Page 1: ...TION Thank you for purchasing this portable CO2 meter The meter measures CO2 level air temperature dew point wet bulb temperature and humidity and is an ideal instrument for indoor air quality IAQ dia...

Page 2: ...rning alarm Battery and optional adaptor power supply Easy manual calibration on CO2 and humidity PC connect via RS232 interface MATERIAL SUPPLIED This package contains CO2 Meter 4 AA batteries Operat...

Page 3: ...eit AVG ftm m s Vain icons in these models KEYPAD Turns on and off the meter Enters setup mode Sets as non sleep mode with Exits setup page mode Enters CO2 calibration with Enters RH calibration with...

Page 4: ...from high to low temperature it takes 30 sec to respond for CO2 sensor and 30 minutes for RH NOTE Do not hold the meter close to anyyone s face in case exhalation affects CO2 levels AIR DP WBT Press...

Page 5: ...WA modes the main display shows the weighted average of CO2 readings for the past 15 minutes STEL and 8 hours TWA The lower displays are the current AIR DP WB temperatures and humidity Fig 8 NOTE 1 If...

Page 6: ...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 o or P3 o and it r...

Page 7: ...will be calibrated as 400ppm by default and will lead to inaccurate measurements CALIBRATION SITE The manual calibration is suggested to be done in fresh outdoor air that is well ventilated and in su...

Page 8: ...C are blinking on the LCD with current temperature at the left Meter is now calibrating and will finish in about 60 minutes when CAL and humidity stop blinking Fig 16 75 CALIBRATION After 33 calibrat...

Page 9: ...E03 The value is over range E04 The original data error results in this error DP WB E07 Too low a voltage to measure CO2 Replace batteries or use the adapter E11 Retry humidity calibration E17 Retry...

Page 10: ...95 RH avoid condensation Storage 4 to 140 F 20 to 60 C 0 to 99 RH avoid condensation Power Source 4 AA batteries DC adaptor Battery life 24 hours Alkaline CO2 LEVELS AND GUIDELINES NON ENFORCED REFERE...

Page 11: ...O2 at averaged over the whole day i e 9 00am to 3 30pm should not exceed 1 500ppm OSHA 5 000ppm Time weighted average over five 8 hour work days should not exceed 5 000ppm Germany Japan Australia UK 5...

Page 12: ...L FREE 800 697 8665 e mail sales generaltools com www generaltools com CDM77535 User s Manual Specifications subject to change without notice 2008 GENERAL TOOLS INSTRUMENTS NOTICE WE ARE NOT RESPONSIB...