Thermo Scientific 49iQ Instruction Manual page 163

Thermo Scientific
4. Allow this value to stabilize.
5. Record the value as [O
2 in the "Periodic Zero and Span
Note Level 1 setting.
6. Adjust Level 2 for the desired level (typically 90 ppb).
7. Allow this value to stabilize.
8. Record the Level 2 value as [O
equation:
URL

[(A Z)
20

% Error
[O
Where:
A = Recorder response with precision level, % scale
20
Z = Recorder response with zero air, % scale
URL = Upper range limit
Note The expected stability of the instrument section is greater then the
expected stability of the internal ozonator.
] to be used in the span error equation of Step
3 80
Checks" section described previously.
] to be used in the following error
3 20

] [O ]
3 20
100

100
]
3 20
▲
Calibration
Internal Ozonator Adjustment
49iQ Instruction Manual 4-15