General-tools-and-instruments CDM77535 Manual de usuario

CDM77535USER’S MANUALDigital CO2Environmental MeterINTRODUCTIONThank you for purchasing this portable CO2meter. The metermeasures CO2level, air temper

SPECIFICATIONCO2Range: 0-5,000ppm5,001-9,999 (out of scale)Resolution: 1ppmAccuracy: ±50ppm ±5%rdg (0-5,000ppm)Not specified for out-of-scalePressureD

Type 1 Indoor areas such as department stores, theaters,restaurants, libraries, the acceptable CO2concentrationof 8 hours average is 1,000ppm.Type 2 I

GENERAL TOOLS & INSTRUMENTS™80 White Street, New York,NY10013-3567PHONE (212) 431-6100 FAX (212) 431-6499TOLL FREE (800) 697-8665e-mail: sales@gen

Poor indoor air quality is considered unhealthy because it causestiredness, loss of ability to concentrate, and even illness (ex. SickBuilding Syndrom

LCD DISPLAYSYMBOLSTWA . . . . . . . . . . Time weighted average (8 hours)STEL . . . . . . . . . . Short-term exposure limit(15 minutes weighted averag

OPERATIONPOWER ON/OFFPress ( ) to turn the meter on and off. At power up, it emits ashort beep and performs 30 seconds count down (Fig. 2) for meterwa

BACKLIGHTHold down ( ) for more than 1 second to activate and cancelbacklight function.MIN, MAX, STEL, TWAUnder normal mode, press ( ) to see the mini

ALARMThe meter features an audible alarm to give warnings when CO2concentration exceeds the limit. (See P1.o in setup for setting alarmthreshold). It

PROGRAMMING P3.o TEMPERATURE SCALEPress ( ) or ( ) in P1.o to access P3.o for setting uptemperature scale (Fig. 12). Press ( ) and it goes into P3.1 w

RH CALIBRATIONThe meter defaults to have the humidity calibrated with 33% and 75%salt solution. The ambient condition is recommended to be at 77°F(25°

TROUBLESHOOTING? CAN’T POWER ONPress ( ) for more than 0.3 seconds and try again. Checkwhether batteries are in good contact with correct polarity, or