Specifications

Comfort Chek 100/200
Instruction 0019-9321
3
2.0 OPERATION
2.1 Important Note
Always ensure that the instrument’s gas inlet (Figure 1, Item A) and gas
outlet (Figure 1, Item B) are unobstructed and open to the atmosphere.
Be careful not to breath directly on the instrument while taking a mea-
surement; otherwise, inaccurate readings will result.
2.2 Switching the Instrument ON/OFF
Switch ON the instrument by momentarily pressing the button. Switch
the instrument OFF by pressing the button for at least 3 seconds, or
until the display goes blank. When fi rst switched ON, there is a warm-
up period of approximately 1 minute before the CO
2
level begins to be
displayed. Note that a normal fresh-air-background reading of CO
2
is
approximately 340 ppm.
Figure 1. Components of the Comfort Chek
A - Gas inlet fi tting
B - Gas outlet fi tting (Model 200)
C - LCD display
D - Temperature and humidity sen-
sor probe
E - IrDA link
F - Pump ON light (Model 200)
G - Press once to switch ON instru-
ment; press once to start and stop
pump (Model 200); hold 3 seconds
to switch OFF instrument ( )
H - Battery charging socket
I - Press once to store data; hold to
start and stop data-logging (f
1
)
J - Press once for battery level; hold
to start Air Calibration (f
2
)
K - Press once to scroll through mea-
surement channels; hold for peak
gas reading (f
3
)
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