Teledyne 300M - Manual (Page 27)

Teledyne API Model 300M CO Analyzer Instruction Manual, 04033, Rev. A
2 OPERATION
2.1 Key Features
The important features of the Teledyne API Model 300M CO Analyzer are listed below.
2.1.1 CO Readout
The Teledyne API Model 300M CO Analyzer constantly displays the current Carbon Monoxide
reading (in PPM) in the upper right hand corner of the alphanumeric display.
2.1.2 CO Analog Output
The Teledyne API CO Analyzer provides a buffered analog output of the current CO readings on
each of two pairs of outputs on the rear panel (see Figure 1-3) for DAS and recorder reporting.
The analog outputs provide for 20% over-range. For example, on the 500 PPM range the
M300M will correctly report concentrations up to 600 PPM and output up to 6.00 volts to the
DAS and recorder outputs. In addition TEST function values can be routed to a third analog
output.
2.1.3 E 2 ROM Backup Of Software Configuration
The Teledyne API CO Analyzer has a few jumpers that need to be set by the operator.
Configuration of the analyzer is done under software control and the configuration options are
stored in electrically erasable (E
2 ) ROM. Thus, configuration options are saved even when the
analyzer is powered off.
There is one exception to this. The analog output voltage ranges are set by jumpers on the A/D-
I/O board as shown in Section 10.6.3.
2.1.4 Adaptive Filter
The M300M CO Analyzer is able to provide a smooth, stable output by means of an adaptive
filter. During conditions of constant or nearly constant concentration the filter is allowed to grow
to 200 samples (1 minute) in length, providing a smooth, stable reading. If a rapid change in
concentration is detected, the filter is cut to 20 samples to allow the analyzer to quickly respond
to rapidly varying signals.
2-1