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Teledyne API N500 CAPS NO
X
Analyzer with NumaView™ Software
089770000 Rev 05
Table 4-3. Auto Cal Programming Sequence Execution
ATTRIBUTE
ACTION
Start
When the Enabled box is “on” , the Sequence (identified by its
number) begins on the date and time shown in the configurable Start
field. (Click the field for the pop-up window and toggle between the
Time (Hour/Minutes) and the Date (Year/Month/Day) attributes to edit
as needed).
Interval
Number of minutes to skip between each Sequence execution. (Click
the field to input the number of minutes in the pop-up window).
Duration
Number of minutes that each Sequence execution is to run. (Click the
field to input the number of minutes in the pop-up window).
Important
IMPACT ON READINGS OR DATA
•
The programmed STARTING_TIME must be a minimum
of 5 minutes later than the real time clock for setting
real time clock (Setup>Instrument, Section 2.5.7).
•
Avoid setting two or more sequences at the same time
of the day.
•
Any new sequence that is initiated whether from a
timer, the COM ports or the contact closure inputs will
override any sequence that is in progress.
•
It is recommended that calibrations be performed using
external sources of Zero Air and Span Gas whose
accuracy is traceable to EPA standards.
TITRATION EFFICIENCY (TE) CHECK/CALIBRATION
The efficiency at which the O
3
titrates NO in the sample gas can change over time,
thereby affecting the accuracy of the instrument’s gas measurements. To compensate for
this and maintain accuracy, the firmware includes a Titration Efficiency (TE) gain factor
that is used to calculate the final concentrations. This gain factor is stored in the
analyzer’s memory.
The method is to deliver a known concentration of NO span gas, typically 80%-90% of
the desired range, and after the instrument stabilizes, perform a TE adjustment in the Vars
menu if required (Setup>Vars>Titrate Eff). This adjusts the measured NO value, which is
then added to the NO
2
value to calculate the NO
X
value.
Содержание N500
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