Data Sheet
Oxygen is everywhere. The Zero D.O. calibration solution has been designed to
chemically absorb oxygen. Once the bottle has been opened the test solution has been
exposed to oxygen and will slowly stop working.
How to preserve the
Zero D.O. calibration solution
1
5
10
15
20
25
30
1
5
10
15
20
25
30
A
B
C
D
E
F
G
H
I
J
A
B
C
D
E
F
G
H
I
J
“Cal”
“Cal,0”
1
1
2 3
3
2
Dissolved Oxygen
TM
0:10 − 1:30
O
2
O
2
N
2
N
2
N
2
N
2
Gas
Void space
Only the gas.
(not the flame)
Trapped air
Inside each bottle of the calibration solution is a small amount of nitrogen gas that helps
displace oxygen out of the bottle during the lling process. When the Dissolved Oxygen
probe is removed from the bottle, oxygen will enter the bottle and begin to dissolve
into the solution.
In order slow down this process, ll the void space of the bottle with any gas (other
than oxygen) to preserve the calibration solution. Gas from a lighter works great if other
gases are currently unubtainable.
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