Teledyne GFC7000E User Manual Page 44

  • Download
  • Add to my manuals
  • Print
  • Page
    / 265
  • Table of contents
  • BOOKMARKS
  • Rated. / 5. Based on customer reviews
Page view 43
Model GFC7000E Instruction Manual Frequently Asked Questions
04584 Rev A1 33
4. FREQUENTLY ASKED QUESTIONS
4.1. FAQ’s
The following is a list from the Teledyne Instruments’ Customer Service Department of the most
commonly asked questions relating to the Model CO
2
Analyzer.
Q: How do I get the instrument to zero / Why is the zero key not displayed?
A: See Section 11.2.4 Inability to zero.
Q: How do I get the instrument to span / Why is the span key not displayed?
A: See Section 11.2.3 Inability to span.
Q: Why does the ENTR key sometimes disappear on the Front Panel Display?
A: 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.
Q: Is there an optional midpoint calibration?
A: There is an optional mid point linearity adjustment, however, midpoint adjustment is applicable
only to applications where CO
2
measurements are expected above 100 ppm. Call Teledyne
Instruments’ Service Department for more information on this topic.
Q: How do I make the display and datalogger analog input agree?
A: 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 6.9.4.3 of this manual.
Alternately, use the datalogger itself as the metering device during calibrations procedures.
Q: How do I perform a leak check?
See Section 9.3.3.
Q: How do I measure the sample flow?
A: Sample flow is measured by attaching a calibrated rotameter, wet test meter, or other flow-
measuring device to the sample inlet port when the instrument is operating. The sample flow
should be 800 cm
3
/min ±10%. See Section 9.3.4.
Page view 43
1 2 ... 39 40 41 42 43 44 45 46 47 48 49 ... 264 265

Comments to this Manuals

No comments