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089770000 Rev 05
Teledyne API N500 CAPS NO
X
Analyzer with NumaView™ Software
79
•
Incoming concentrations may not be linear.
•
Check input bottles.
•
Span gas overflow is not properly vented and creates a back-pressure on the
sample inlet port.
•
Also, if the span gas is not vented at all and does not supply enough sample
gas, the analyzer may be evacuating the sample line.
•
Ensure to create and properly vent excess span gas.
OTHER PERFORMANCE PROBLEMS
Dynamic problems (i.e., problems that only manifest themselves when the analyzer is
monitoring sample gas) can be the most difficult and time consuming to isolate and
resolve. The following section provides an itemized list of the most common dynamic
problems with recommended troubleshooting checks and corrective actions.
E
XCESSIVE
N
OISE
Excessive noise levels under normal operation usually Indicates leaks in the sample
supply or the analyzer itself.
•
Ensure that the sample or span gas supply is leak-free, and carry out a detailed
leak check as described earlier in this chapter.
Other sources of measurement noise may be related to cabling issues.
•
Gain access to the instrument, when powered down, and reset the cable
connectors.
S
LOW
R
ESPONSE
If the analyzer starts responding too slow to any changes in sample, zero or span gas,
check for the following:
•
Dirty or plugged sample filter or sample lines.
•
Sample inlet line is too long.
•
Dirty or plugged flow restrictor. Check flows, pressures and, if necessary, change
restrictor.
•
Wrong materials in contact with sample - use glass, stainless steel or Teflon
materials only.
•
Insufficient time for purging lines upstream of the analyzer. Wait for stability is
reached.
•
Insufficient time for calibration gas source to stabilize. Wait until stability is reached.
Содержание N500
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