17
If zero calibration is done with sucking CO2 gas in the atmosphere
directly, correct detection can not be performed. Normally, CO2
exists 300ppm～500ppm in the air. (Refer to 2-3.)
In case of using zero gas.
・
Gas sampling bag should be filled with zero gas.
・
Before filled with zero gas, gas sampling bag should be empty fully by
using sampling pump of this instrument etc.
In case of using absorption tube
・
Absorption tube should be filled with absorbent agent in advance.
・
When filling absorbent agent to the tube, fill up closely, and fix them by
absorbent cotton.
・
Remove the cap of absorption tube, when use.
・
Attach the cap with absorption tube after use, in order to cut off the
porous contact with atmosphere. The capacity of absorption goes
down due to absorbing CO2 gas in the atmosphere.
・
Store absorption tube in a dry room where direct sunshine does not
reach.
・
Absorption tube should be used vertically. If use it horizontally, CO2
in air may not be adsorbed.
Wrong
This part, air pass through, CO2 can not be absorbed
.
Correct
Caution
！
＊
Note
