2 sample mode, 1 test functions – Teledyne 9110AH - Nitrogen oxides analyzer User Manual

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TELEDYNE Model 9110AH NO

Analyzer Operator Manual, 01620, Rev. F

5-9

5.2 Sample Mode

5.2.1 Test Functions

NOTE

In any of the following TEST functions, if a value of

XXXX is displayed, that indicates an off scale and

therefore meaningless reading.

TEST functions allow the operator to examine several important operating parameters of the
M9110AH to verify correct Analyzer operation. If faults are discovered, refer to
Troubleshooting Section 9.

Range (RANGE)

This is the Range of the instrument. In single range mode there is one range for all 3 rear panel
analog outputs.

The AutoRange option allows 2 different ranges for each channel, and will automatically switch
to the other range dynamically as concentration values require. By selecting Remote
AutoRange, the range change can be controlled remotely. The TEST values will show the range
the instrument is currently operating in, and will dynamically display range change information
when necessary.

Independent range option allows different ranges for each output. When enabled, there will be
three range values displayed, NO, NO

and NO

NOTE

Each of the range modes Single range, Auto range, and

Independent ranges are mutually exclusive.

Signal Stability (STABIL)

The instrument noise is computed by calculating the standard deviation of the last 10 minutes of
concentration data. If NO/ NO

switching mode is selected, the noise reading is that of the NO

channel. If NO only or NO

only mode is selected the Noise applies to the mode selected. The

noise value only becomes meaningful if sampling a constant concentration for more than 10
minutes. The noise value should be compared to the value observed in the factory check-out.