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Extech Instruments CO230, Руководство пользователя, Страница: 3 / 13

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CO230-en-GB_v1.0   1/16 

3 

Descriptions 

Meter Description

 

1. Temperature/RH sensor
2. Main Display
3. Alarm Relay Output
4. Aux. Displays 
5. 12V AC Adaptor jack
6. Keypad
7. Alarm alert lamp
8. CO

2

 sensor 

Note: Wall mount hole and relay 
wiring screws are located on the back 

Display Description 

1. CO

2

 concentration (ppm)

2. Relative Humidity (%)
3. Air Temperature, Dew Point or

Wet Bulb Temperature  (°C / °F)

Display Icons 

TWA  

Time weighted average (8 hours) 

STEL  

Short-term exposure limit (15-min. weighted average) 

HOLD 

Holds reading on display 

MIN/MAX 

Minimum/Maximum readings 

DP 

Dew point temperature 

AIR  

Air temperature 

WBT 

Wet bulb temperature 

%  

Relative Humidity measurement unit 

°E (C/F) 

Temperature units (Celsius/Fahrenheit) 

Содержание CO230

Страница 1: ...User Guide Wall Mount CO2 Monitor Model CO230 99 Washington Street Melrose MA 02176 Phone 781 665 1400 Toll Free 1 800 517 8431 Visit us at www TestEquipmentDepot com ...

Страница 2: ...pm The NDIR non dispersive infrared sensor provides stable long term monitoring This meter is shipped fully tested and calibrated and with proper use will provide years of reliable service FEATURES LCD simultaneously displays CO2 Level Relative Humidity and Temperature air dew point or wet bulb Stable NDIR sensor for CO2 detection Weighted averaging TWA 8 hours STEL 15 minutes Automatic Baseline C...

Страница 3: ...ed on the back Display Description 1 CO2 concentration ppm 2 Relative Humidity 3 Air Temperature Dew Point or Wet Bulb Temperature C F Display Icons TWA Time weighted average 8 hours STEL Short term exposure limit 15 min weighted average HOLD Holds reading on display MIN MAX Minimum Maximum readings DP Dew point temperature AIR Air temperature WBT Wet bulb temperature Relative Humidity measurement...

Страница 4: ...e display Selects units or increases value in calibration and setup MXN AVG Activates MIN MAX STEL TWA functions Select mode or decrease value in calibration and setup Operation POWER ON OFF The meter is powered by a 12VDC adaptor Power the unit by plugging the AC adaptor into the meter and into an AC source The meter will switch ON with a short beep The LCD will perform a 30 second countdown and ...

Страница 5: ... DP dew point temperature and WBT wet bulb temperature shown on the lower left display MIN MAX STEL TWA MODES In the normal mode use the Max AVG button to see the minimum maximum and weighted average readings Use the Max AVG button to step through MIN MAX STEL and TWA modes in sequence and then back to the normal mode In MIN and MAX modes the meter shows the minimum and maximum readings of CO2 mai...

Страница 6: ...gh limit The beeper stops when any key is pressed or if the reading falls below the low setpoint limit Press and hold SET to stop the beeper The LED lamp will continue to flash when the beeper is manually shut off if there is still an alarm condition The LED will stop flashing when readings return to normal ALARM RELAY OUTPUT The meter includes an internal reed relay that can be connected to an ex...

Страница 7: ... to adjust the value Each button press adjusts by 100 ppm 100 9900ppm When the desired value is set press SET to enter P1 2 to set the lower limit using the same method as for the high limit When finished press SET to save or CAL ESC to exit without saving and return to P1 0 P3 0 TEMPERATURE UNITS C F Use the DP WB button from the P1 0 display to access P3 0 Press SET to enter P3 1 for setting the...

Страница 8: ...gs or CAL ESC to exit without saving and return to P4 0 Calibration CO2 CALIBRATION The meter is factory calibrated to a 400ppm CO2 standard concentration NOTE The meter should be returned to Extech for calibration once per year or whenever the accuracy of the meter is in question CAUTION Do not calibrate the meter in an atmosphere of unknown CO2 concentration There are 2 options for calibration A...

Страница 9: ...RESET RH CALIBRATION The meter is calibrated to standard 33 and 75 salt solutions To abort calibration press and hold the RESET button for 1 second CAUTION Do not calibrate the humidity without standard calibration salt bottles Otherwise the meter will have to be returned for specialized calibration service Contact Extech for calibration salts or calibration service 33 calibration 1 Plug the senso...

Страница 10: ...rent temperature shown on the left side of the display 4 The meter is now calibrating and will finish in approximately 60 minutes blinking stops The meter will automatically return to the normal mode NOTE Single point calibrations can also be performed To calibrate 33 only press CAL ESC and stop after the 33 calibration is completed To calibrate 75 only press DP WB or MXN AVG within 5 minutes of i...

Страница 11: ... to 140 F 0 1 Calculated from RH and Temperature Dew Point 20 to 60 C 4 to 140 F 0 1 Display Backlit LCD with three display windows Sensors CO2 NDIR non dispersive infrared type Humidity Capacitance type Temperature air Thermistor Alarm relay 30VDC 1A 125VAC 0 5A Form C Reed relay 30W DC 62 5VA AC max Switching power Warm up Time 30 seconds Operating Conditions 0 to 50 o C 32 to 122 o F 95 RH non ...

Страница 12: ...ING No Power Check that the AC adaptor is properly connected Slow response Ensure that air flow channels on the back of meter are not blocked Error messages E01 CO2 sensor damage E02 Under range measurement E03 Over range measurement E04 Humidity Dew Point or Wet Bulb error E07 Low voltage check that the AC adaptor output is 12V E11 Calibration error retry the humidity calibration E17 Calibration ...

Страница 13: ...its ASHRAE Standard 62 1989 1000ppm CO2 concentration in occupied building should not exceed 1000ppm OSHA 5000ppm Time weighted average over five 8 hour work days should not exceed 5000ppm Building bulletin 101 Bb101 1500ppm UK standards for schools specify that CO2 averaged over one school day i e 9 00am to 3 30pm should not exceed 1500ppm Germany Japan Australia UK 5000ppm 8 hour weighted averag...

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