Serinus 44 User Manual 3.0
Page 104
14.
Open -
Main Menu
Calibration Menu
.
15.
Edit -
Conv. Efficiency NO2
- (change back to original efficiency) - Accept.
16.
Edit -
Conv. Efficiency NH3
- (change back to original efficiency) - Accept.
17.
Remove the bypass loop and reconnect the external converter.
5.7.2
Multipoint NO
2
to NO Converter Efficiency Adjustment
A multipoint converter efficiency check is performed to determine the actual converter efficiency
across the range of the instrument. The instrument is then adjusted accordingly.
In the S44, the
Conv. Efficiency NO2
value displayed in the
Main Menu
Service Menu
Calculation Factors Menu
only applies to the NO
X
path converter coil. The efficiency of the second
coil for the N
X
path in conjunction with the external converter and other losses throughout the
instrument make up the
Conv. Efficiency NH3
. Therefore the NH
3
efficiency should not be adjusted
as part of this procedure.
Note:
For the following procedure the results for the NH
3
and N
X
channels can be ignored; bypassing
the NH
3
converter is not required.
Equipment Required
Gas Dilution Calibrator which can perform a Gas Phase Titration (GPT) (such as a Serinus Cal
2000/3000) with ozone.
NO gas cylinder reference standard.
Zero Air Generator.
Procedure
1.
Open -
Main Menu
Calibration Menu
.
2.
Note down the current values for
Conv. Efficiency NO2
.
3.
Edit -
Conv. Efficiency NO2
- (change to 100%) - Accept.
4.
Supply the instrument with zero air from your gas dilution calibrator.
5.
Allow the instrument to achieve a prolonged, stable measurement response and note down the
NO, NO
2
and
N
X
values for reference only. If you get greater than 3 to 5 ppb you need to
troubleshoot the instrument and calibration system before continuing with this procedure.
6.
Supply the instrument with NO span gas at a concentration of 80% of the full-scale monitoring
range of the particular instrument.
7.
Allow the instrument to achieve a prolonged, stable measurement response and note down the
NO, NO
2
and
N
X
values. Label them as [NO]
ORIG
, [NO
2
]
ORIG
and [N
X
– NO]
ORIG
after you perform the
calculation of N
X
– NO.
8.
Without changing the previous span concentration, turn on the O
3
generator in the GPT system,
and react the NO and O
3
to produce NO
2
. The O
3
concentration should be no more than 80% of
the supplied NO concentration; there should still be excess un-reacted NO measured by the
instrument.
Summary of Contents for Serinus 44
Page 1: ...Serinus 44 Ammonia Oxides of Nitrogen Analyser User Manual Version 3 0 www ecotech com...
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Page 137: ...Troubleshooting Page 137 7 6 USB Memory Stick Failure Figure 71 USB Memory Stick Failure...
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Page 150: ...Serinus 44 User Manual 3 0 Page 150 9 5 Plumbing Schematic D020018...
Page 151: ...Parts List and Schematics Page 151 9 6 Block Wiring Schematic D020104...
Page 152: ...Serinus 44 User Manual 3 0 Page 152 9 7 Ozone Generator Assembly H011107...
Page 153: ...Parts List and Schematics Page 153 9 8 Optical Bench Assembly H011200...
Page 154: ...Serinus 44 User Manual 3 0 Page 154 9 9 Manifold Block Assembly H011302...
Page 155: ...Parts List and Schematics Page 155 9 10 Calibration Manifold Assembly H010013 01...
Page 156: ...Serinus 44 User Manual 3 0 Page 156 9 11 Valve Assembly H010042...
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