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1. Introduction
The meter measures CO
level and air temperature and is an ideal instrument for indoor air quality (IAQ)
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diagnosis. Poor indoor air quality is considered unhealthy because it causes tiredness, loss of ability to
concentrate and even illness. It is also considered very important to prevent the spread of Covid-19. IAQ
monitoring and survey, especially on CO
level and air ventilation has become widely applied in public areas
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such as offices, classrooms, factories, hospitals and hotels.
This portable meter CO
meter uses NDIR (non-dispersive infrared) technology to ensure the reliability and long-
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term stability. It is useful in verifying HVAC system performance and air ventilation control.
Features:
· Stable NDIR sensor for CO
detection.
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· Statistics of weighted averages TWA (8 hours weighted average) STEL (15 minutes weighted average).
· Backlight for working in dark areas.
· Auditive CO
warning alarm.
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· Battery and adaptor power supply.
· Easy manual calibration on CO
.
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Material supplied (the package contains):
· Meter
· 4 pcs AA batteries
· Hard carrying case
Power supply:
The meter is powered by either 4 AA batteries or a DC adaptor (9V/1A output). Install the batteries into the
battery compartment on the rear and make sure they are in correct polarity and good contact. When an
adaptor is used, it will cut off the power supply from batteries. The adaptor can't be used as a battery charger.
When battery voltage gets low,
and "Lob" will appear on the screen (Fig. 1) and the beeper will sound. The
CO
sensor cannot work under low voltage, si it beeps to indicate failed CO
measurement (press any key
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except SET to stop the beeping) and the readings will not be displayed. Please replace with fresh batteries or
connect with an adaptor.
Figure 1
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