Thermo 42i, Instruction Manual

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Operation
Software Overview
3-6 Model 42
i
Low Source Instruction Manual Thermo Electron Corporation
Power-Up Screen
The Power-Up screen is displayed on power up of the Model 42 i Low
Source . The Self-Test is displayed while the internal components are
warming up and diagnostic checks are performed.
Run Screen
The Run screen displays the NO, NO
2
, and NO
x
concentrations. The
status bar displays time and the status of the remote control interface, and
optional zero/span solenoid valves, if installed. The word “SAMPLE” on the
bottom left of the display indicates the analyzer has the span/zero valve
option and is in “SAMPLE” mode. Other modes appear in the same area of
the display as “ZERO” or “SPAN”. For more information about the
optional solenoid valves, see Chapter 9, “Optional Equipment”.
When operating in dual or auto range mode, two sets of coefficients are used
to calculate the NO-NO
2
-NO
x
“LOW” and “HIGH” concentrations. Also,
two averaging times are used—one for each range. The title bar indicates
which range concentrations are displayed. The words “LOW RANGE
CONCENTRATION” on the top of the display indicates that the low
concentration is displayed. In dual range mode, pressing the
and
arrows will toggle between high and low concentrations. The
example below shows the Run screen in single range mode.
Please wait while booting...