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User Manual
GSM450
CO/CO2 Meter with RH% and Temperature
Introduction
Thank you for selecting the Triplett GSM450 Meter. The GSM450
measures CO2 (Carbon Dioxide) levels, CO (Carbon Monoxide) levels,
air temperature, and relative humidity. The GSM450 also displays dew
point and wet bulb temperatures, generated from calculations performed
on temperature and humidity measurements. The GSM450 is an ideal
instrument for indoor air quality (IAQ) analysi
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Summary of Contents for Triplett GSM450
- Page 1 GSM450 CO/CO2 Meter with RH% and Temperature Introduction Thank you for selecting the Triplett GSM450 Meter. The GSM450 measures CO2 (Carbon Dioxide) levels, CO (Carbon Monoxide) levels, air temperature, and relative humidity. The GSM450 also displays dew point and wet bulb temperatures, generated from calculations performed on temperature and humidity measurements.
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Page 2: Safety Information
Carbon Monoxide Alarm or Monitoring requirements. 2. The GSM450 Carbon Monoxide Monitor has not been tested by an independent lab to comply with the UL 2034 or IAS 6-96 standard. 3. It is the responsibility of the customer to obtain and apply current local, state, and national regulations with regard to CO alarms, monitoring and testing. - Page 3 Effects of Carbon Monoxide (CO) poisoning Warning: Ensure that the meter is powered, at room temperature, and in an area free of Carbon Monoxide (CO) before starting measurements. If not, the meter will read incorrectly when subsequently measuring CO. 0-1 PPM Normal background levels 9 PPM Maximum allowable short term exposure...
- Page 4 Regulatory exposure limits for Carbon Dioxide (CO ASHRAE Standard 62-1989: 1000ppm: CO2 concentration in occupied building should not exceed 1000ppm. OSHA: 5000ppm: Time weighted average over five 8-hour workday should not exceed 5000ppm. Building bulletin 101 (BB101): 1500ppm. UK standards for schools state that CO2 averaged over the whole day (i.e.
- Page 5 LCD DISPLAY Carbon dioxide Carbon monoxide Time weighted average (8 hours) STEL Short-term exposure limit (15 minutes weighted average) HOLD Freezes current reading on display MIN/MAX Minimum/Maximum readings Low battery indicator Dew point temperature Air temperature Wet bulb temperature Relative humidity C or F Celsius/Fahrenheit Calibration Mode...
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Page 6: Battery Installation
KEYPAD Turns on and off the meter. Enters setup mode while meter is off. Sets as non-sleep mode with Exits setup/recall page. Start automatic logging Press to switch displayed mode. Long press to enter memory recall mode. Freezes the current readings. Selects unit or increases value in setup. -
Page 7: Operation
Measuring Carbon Dioxide (CO Short press the M/REL button to change the mode to CO necessary. To take a measurement, trace the GSM450 around the area of the suspected leak. The meter indicates the presence of carbon dioxide (CO ) in ppm in the primary display. -
Page 8: Measuring Relative Humidity
Measuring Carbon Monoxide (CO) Short press the M/REL button to change the mode to CO, if necessary. To take a measurement, trace the GSM450 around the area of the suspected leak. The meter indicates the presence of carbon monoxide (CO) in ppm in the primary display. -
Page 9: Advanced Functions
Advanced Functions Data Hold Short press the H/ button to freeze the readings on the display. The "HOLD” icon flashes in the top left of the display. Short press the H/ button again to unfreeze the readings on the display. Note: the HOLD function is not operational in Min/Max/Avg mode. - Page 10 The unit of measure can be changed while in Min/Max mode. Manual Data Recording The GSM450 has 99 memory locations for which to store readings one at a time. While in normal operating mode or hold mode, short press the MEM/...
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Page 11: Automatic Datalogging
To exit memory recall mode, short press the /ESC button. Automatic Datalogging The GSM450 automatically records CO , CO, Temperature, or RH readings and can store up to 32,000 records. The sample rate can be set from 1 second to 4 hours 59 minutes and 59 seconds. See ‘Setup Mode’... -
Page 12: Setup Mode
CO Alarm The meter features an audible alarm (80db beep) that warns when CO concentration exceeds the set limit. The beeper stops when the readings fall below the limit. The meter beeps again if the value exceeds the limit. See the section ‘Setup Mode’ for more information. - Page 13 P20 Setting the CO Alarm When in alarm setup mode, P20 and “ALAr” are displayed. Short press the H/ button to advance to P20 if necessary. Short press the MXMN/AV/ button to advance to P21 and set the CO alarm threshold. The current set value will blink on the display.
- Page 14 Short press the MXMN/AV/ button to advance to set the sampling rate for datalogging. The hour digit will blink in the secondary display. Short press the H/ button to increase the time or short press the MEM/ button to decrease the time. Short press the MXMN/AV/...
- Page 15 P60 Setting the Real-Time Clock When in Real-Time Clock mode, P60 and “rtC” display on the LCD. Short press the H/ button to advance to P60 if necessary. Short press the MXMN/AV/ button to advance to P61 and set the time as 12-hour or 24-hour format. The current time format will flash on the LCD.
- Page 16 PC. To install and use the software, please refer to the instructions provided on the supplied CD-ROM and/or the instructions provided in the HELP Utility within the software program. Software can be downloaded here: Download Triplett Product Software — Triplett — Triplett Test Equipment & Tools...
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Page 17: Troubleshooting
Troubleshooting Error Problem Solution Ensure that batteries are properly installed with correct polarity Press and hold power button to retry No display when pressing Display power button Replace batteries Open the battery compartment and using a small metal tip, press the reset button Check to see if data hold function is... -
Page 18: Maintenance
A/D or temperature sensor Contact Extech for failure service Contact Extech for Memory failure service Contact Extech for A/D or humidity sensor failure service Contact Extech for Measurement circuit failure service Maintenance CLEANING AND STORAGE 1. Clean the meter with a damp cloth and mild detergent when necessary. -
Page 19: Specifications
Specifications Function Range Resolution Accuracy 0 to 5000ppm 1 ppm ±(5%rdg + 30ppm) 5001 to 9999ppm 1 ppm Not specified Pressure dependence: +1.6% of reading per kPa deviation from normal pressure (100kPa) <100 ppm 1 ppm ±(10ppm) 101 to 500 ppm 1 ppm ±(10%rdg) 501 to 1000 ppm 1 ppm... -
Page 20: Warranty
Triplett / Jewell Instruments extends the following warranty to the original purchaser of these goods for use. Triplett warrants to the original purchaser for use that the products sold by it will be free from defects in workmanship and material for a period of (1) one year from the date of purchase.
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