Connect Instrument; Zero Adjust; Model 49I Connected To Calibration Photometer - Thermo Scientific 49i Instruction Manual

Connect Instrument

Zero Adjust

Thermo Fisher Scientific
• after performing a major component disassembly
Connect the Model 49i to the manifold on the output of the ozonator, as
shown in Figure 4-2. If an optional sample line filter is used, the calibration
must be performed through this filter. Ensure that the flow rate into the
output manifold is greater than the total flow required by the calibration
photometer, analyzer, and any other flow demand connected to the
manifold.
Figure 4-2. Model 49i Connected to Calibration Photometer and External
Ozonator
Use the following procedure to adjust zero.
1. Allow sufficient time for the instrument and the calibration photometer
to warm up and stabilize.
2. With the zero air supply ON, but the ozonator OFF, allow the
instrument to sample zero air until a stable response is obtained.
3. From the Main Menu choose Calibration.
4. From the Calibration menu choose Calibrate Zero. Press
perform a zero calibration. Press
Calibration Procedure
Model 49i
to return to the Run screen.
Model 49i Instruction Manual
Calibration
to
4-9