Teledyne 9110EH - Nitrogen Oxides Analyzer - Manual (Page 46)

Frequently Asked Questions & Glossary Model 9110EH Instruction Manual
Q: How often do I need to change the particulate filter?
A: Once per week. Table 9-1 contains a maintenance schedule listing the most important,
regular maintenance tasks. Highly polluted sample air may require more frequent changes.
Q: How long does the sample pump last?
A: The sample pump should last one to two years and the pump head should be replaced
when necessary. Use the RCEL pressure indicator on the front panel to see if the pump
needs replacement. If this value goes above 10 in-Hg-A, on average, the pump head needs
to be rebuild.
Q: Do I need a strip chart recorder or external data logger?
A: No, the M200E is equipped with a very powerful internal data acquisition system (iDAS).
Section 6.9.10 describes the setup and operation in detail.
Q: Why does my RS-232 serial connection not work?
A: There are many possible reasons: 1) the wrong cable, please use the provided or a
generic “straight-through” cable (do not use a “null-modem” type cable), 2) The DCE/DTE
switch on the back of the analyzer is not set properly; make sure that both green and red
lights are on, 3) the baud rate of the analyzer’s COM port does not match that of the serial
port of your computer/data logger. See Section 11.5.11 more trouble-shooting information.
4.2. Glossary
Acronym – A short form or abbreviation for a longer term. Often artificially made up of the
first letters of the phrase’s words.
APICOM – Name of a remote control program offered by Teledyne-API to its customers
ASSY - Acronym for Assembly.
Chemical formulas used in this document:
• NO
X
– nitrogen oxides, here defined as the sum of NO and NO
2
• NO – nitric oxide
• NO
2
– nitrogen dioxide
• NO
Y
– nitrogen oxides, often called odd nitrogen, the sum of NO, NO
2
(NO
X
) plus
other compounds such as HNO
3
. Definitions vary widely and may include nitrate
(NO
3
- ), PAN, N
2
O and other compounds.
• NH
3
– ammonia
• H
2
O – water vapor
• CO
2
– carbon dioxide
• SO
2
– sulfur dioxide
• HNO
3
– nitric acid
DAS - Acronym for Data Acquisition System, the old acronym of iDAS
DIAG - Acronym for diagnostics, the diagnostic menu or settings of the analyzer
DOC – Acronym for Disk On Chip, the analyzer’s central storage area for analyzer operating
system, firmware, and data. This is a solid state device (Æ IC) without mechanical, moving
32 M9110EH Rev 0