Frequently Asked Questions - Teledyne 300E Instruction Manual

Model 300E Carbon Monoxide Analyzer
Instruction Manual

4. FREQUENTLY ASKED QUESTIONS

The following is a list from the T-API Customer Service Department of the most
commonly asked questions relating to the Model 300E CO Analyzer.
1. How do I get the instrument to zero / Why is the zero key not displayed?
See Section 11.3.4 Inability to zero.
2. How do I get the instrument to span / Why is the span key not displayed?
See Section 11.3.3 Inability to span.
3. Why does the ENTR key sometimes disappear on the Front Panel Display?
During certain types of adjustments or configuration operations, the ENTR key
will disappear if you select a setting that is nonsensical (such as trying to set
the 24-hour clock to 25:00:00) or out of the allowable range for that
parameter (such as selecting an iDAS Holdoff period of more than 20 minutes).
Once you adjust the setting in question to an allowable value, the ENTR key
will re-appear.
4. Is there an optional midpoint calibration?
There is an optional mid point linearity adjustment, however, midpoint
adjustment is applicable only to applications where CO measurements are
expected above 100 ppm. Call T-API's Service Department for more
information on this topic.
5. How do I make the display and datalogger analog input agree?
This most commonly occurs when an independent metering device is used
besides the datalogger/recorded to determine gas concentration levels while
calibrating the analyzer. These disagreements result from the analyzer, the
metering device and the datalogger having slightly different ground levels.
If the only difference is a DC offset then it is possible to enter a compensating
value in the analog outputs. This procedure is described in Section 6.5.1 of
this manual.
Alternately, use the datalogger itself as the metering device during calibrations
procedures.
6. How do I perform a leak check?
See Section 9.3.3.
P/N 04288 REV: A
Frequently Asked Questions
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