General Tools and Instruments CDM7722 - Manual (Page 2)

INTRODUCTION
Features:
Triple displays of CO level, temp.
2
and humidity (7722/77232).
s
calibration
PC connect
Stable NDIR sensor for CO detection
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Statistics of weighted average
TWA (8 hours weighted average)
STEL(15 minutes weighted average)
Visible and audile CO warning alarm
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Alarm output for ventilation control
ABC(Automatic Baseline Calibration)
and manual CO
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via RS232 interface
1
Thank you for purchasing this wall mo unt
CO mo nitor. It me asures CO level, air
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temp ., dew point, wet bulb temp . and
humi dity(DP, WB , RH are for mo dels
7722/77232) and is an ideal instrume nt
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
mo nitoring and survey, especially on CO
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level and air ventilation become widely
applied in public areas such as offices,
classrooms , factories, hospitals and
hotels. It is also suggested in regulations
of industrial hygiene in some countries.
(See appendix)
Wi th NDIR (non-dispersive infrared)
sensor used, this CO mo nitor is stable
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in long term mo nitoring. And the built-in
relay for alarm output is especially
helpful in ventilation control and HVAC
system performa nce verification.