Specifications

CO
2
Analyzer 2825/2830/2835
Instruction 0019-9320 3
2.0 OPERATION
2.1 Important Note
Always ensure that the analyzer’s gas inlet connector (Figure 1, Item A)
and gas exhaust (Figure 1, Item B) are unobstructed and open to the at-
mosphere. Be careful not to breath directly on the analyzer while taking
a measurement; otherwise, inaccurate readings will result.
2.2 Switching Analyzer ON/OFF
Switch ON the analyzer by pressing the button. Switch the analyzer
OFF by pressing the button down for at least 3 seconds, or until the
display goes blank. When fi rst switched on, there is an approximate
60 second warm-up period before the CO
2
level is displayed, and 3 min-
utes before the O
2
level is displayed. Note that normal fresh air back-
ground readings are 340 ppm CO
2
and 21% O
2
.
Figure 1. Components of the CO
2
Analyzer
A - Gas inlet fi tting
B - Gas outlet fi tting
C - LCD display
D - Temperature and humidity
sensor probe (Model 2835)
E - IrDA link
F - Pump ON light
G - Press once to switch analyzer
ON; press once to start and stop
pump; hold 3 seconds to switch
analyzer OFF (
)
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
measurement channels; hold for
peak gas reading (f
3
)