Teledyne Carbon Monoxide Analyzer 300 User Manual download pdf (Page 59)

5.0 DIAGNOSTICS

The Teledyne API carbon monoxide analyzer contains two levels of diagnostics: test

measurements which can be viewed at all times (except when in setup) by pressing

TEST, and lower level diagnostic operations which can only be performed by pressing

SETUP-DIAG.

5.1 Test measurements

As stated, test measurements can be viewed at any time except when in setup. To view a

different test measurement, simply press the TEST button. Table 2.3 lists the test

measurements which are available. Viewing these test measurements does not interfere

with the operation of the Model 300 or the carbon monoxide reading in any way, so they

may be viewed freely.

NOTE

IF THE VALUE OF ANY TEST FUNCTION IS DISPLAYED

AS “XXXX”, THIS INDICATES THAT THE READING IS OFF

SCALE OR OTHERWISE NON-VALID.

Additionally, the values of most TEST functions can output as an analog voltage at the

instrument's rear panel (see Figure 1.2). The TEST function to be output is selected by

pressing SETUP-MORE-DIAG. Press NEXT until TEST CHANNEL OUTPUT

appears. Press ENTR. Select test channel function and press ENTR. Table 5.1 below

lists the Test functions available for analog output.

In addition to outputting a value to the analog output channel, these tests activate a new

test measurement which displays the analog voltage reading on the front panel as:

"TEST=XXXXX.X MV".

When you exit the diagnostics, this test measurement is removed.

5.2 Diagnostic tests

The diagnostic tests are used to help diagnose a problem in the Analyzer and should only

be used by skilled maintenance people since they can potentially interfere with the carbon

monoxide reading. Table 5.1 below lists the low level diagnostic tests which are

available. To get into the diagnostic test mode, press SETUP-DIAG. When the

diagnostic mode is entered, a message is sent to the RS-232 channel indicating entry into

the diagnostic mode. The buttons which are available to the operator are described

below.

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Teledyne Carbon Monoxide Analyzer 300 User Manual Page 59