Teledyne 100AH instruction manual Sample Mode, Test Functions

Teledyne API Model 100AH SO2 Analyzer Instruction Manual, 02417, Rev. D

5.2Sample Mode

5.2.1Test Functions

NOTE

In any of the following TEST functions, if XXXX is displayed, that indicates an off scale and therefore meaningless reading.

To use the TEST functions to diagnose instrument faults, refer to Troubleshooting Section 10.1.

Range

This is the range of the instrument. In standard configuration there is one range for both REC and DAS outputs.

Dual range allows a different range for each output. When enabled, the RANGE test measurement is replaced with two different test measurements, RANGE1 (LOW RANGE) and RANGE2 (HIGH RANGE).

Auto range option allows a low range and high range. The M100AH will automatically switch to the other range dynamically as concentration values require. The TEST values will show the range the instrument is currently operating in, and will dynamically display the alternate range as the range changes occur.

Stability

The instrument stability is used to indicate the stability of measurement of analyzer. It is computed as the standard deviation of 25 samples of a moving window with interval of 10 seconds between each sample.

Sample Pressure

Sample pressure is measured using a solid state pressure sensor at the upstream of the flow control module. This reading will vary according to the sample gas pressure, altitude and local weather condition.

Vacuum Pressure

Sample pressure is measured at the downstream of the flow control module. This reading is the reaction cell pressure which is used by the CPU to compensate the SO2 concentration due to its pressure of the sample gas in the reaction cell.

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