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D
R
ATA
A strip chart recorder, data acquisition system or digital data acquisition system should be
used to record data from either the Ethernet, serial or analog outputs.
If analog readings are used, the response of the recording system should be checked
•
against a NIST traceable voltage source or meter.
•
Data recording devices should be capable of bi-polar operation so that negative
readings can be recorded.
For electronic data recording, the analyzers provide an internal data logger, which is
configured through the Setup>Data Logger menu (Section 2.5.1).
NumaView™ Remote is a remote control program, which is also available as a convenient
and powerful tool for data viewing and handling, download, storage, quick check and
plotting.
NO
C
ONVERSION
2
The efficiency at which the NO
the accuracy of the instrument's NO
a Converter Efficiency (CE) gain factor that is multiplied by the NO
measurements to calculate the final concentrations for each. This gain factor is stored in
the analyzer's memory.
The default setting for the NO
in the converter oxidizes and it becomes less efficient at converting NO
To ensure accurate performance of the analyzer, it is important to check the NO
conversion efficiency (CE) periodically as presented in Section 4.5.
CALIBRATION PROCEDURES
Check that the pneumatic connections for the specific instrument configuration are as
instructed in Section 2.3.2. Calibration procedures include setting the expected span gas
concentration (see Note below).
Verify/change (if needed) the settings in the Setup>Vars menu as follows:
•
User Units (unit of Measure): PPB
Max Concentration Range (highest concentration expected to measure)
•
Range Mode: SNGL
•
Then perform the calibration:
Perform a Zero calibration using zero air.
•
•
Perform a span calibration on both the NO & NOx channels using a known
concentration of NO span gas.
•
Perform the two-point Converter Efficiency (CEA and CEB) calibration using a
known concentration of NO
083730200A DCN7962
D
ECORDING
EVICES
E
FFICIENCY
-to-NO converter changes NO
2
, NO and NO
x
converter efficiency is 1.0000. Over time, the molybdenum
2
span gas.
2
Teledyne API T200 NO/NO
(CE)
into NO directly affects
2
measurements. The firmware includes
2
/NO
Analyzer with NumaView™ Software
2
x
and NO
2
X
into NO.
2
2
95
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