Teledyne Analytical Instruments 3020 M, Operating Instructions Manual

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Paramagnetic Oxygen Analyzer Introduction
Teledyne Analytical Instruments
9

Gas Sample Inlet and Outlet
One inlet and one exhaust out.
Optional:

Calibration Gas Ports
Separate fittings for zero, span and sample gas input, plus
internal valves for automatically switching the gases in sync
with the 3020M electronics.
Note: If you require highly accurate Auto-Cal timing, use external
Auto-Cal control where possible. The internal clock in the
Model 3020M is accurate to 2-3%. Accordingly, internally
scheduled calibrations can vary 2-3% per day.