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Teledyne API Model 465L O3 Monitor Operation Manual
46
Teledyne API Model 465L O
3
Monitor Manual
05509G DCN6806
7.2.3.5.
Span Calibration
The span calibration allows the instrument to calibrate its internal slope factor based
on a known ozone concentration. This should be done with a source of ozone span
gas connected to the “Sample In” port of the 465L. Allow the instrument to
stabilize on the span gas source for a minimum of 1 hour before performing the span
calibration.
Figure 7-4 below shows the Span Cal menu. After the instrument has stabilized on
the source of span gas, navigate to the Span Cal menu (See Figure 7-2) and Press
ENT
. Next enter the Span Target concentration (the actual concentration of ozone
being supplied to the monitor) and press
ENT
. The display will next show a
confirmation menu,
ENT TO SPAN
. Press
ENT
to perform the Span Calibration,
or
CFG
to abort back to the start. If the calibration is successful, the display will
return to the concentration menu and the monitor reading should change adjust to
read very close to the target value. If the calibration cannot be performed, an
OUT
OF RANGE
error will be displayed. Press
ENT
to confirm and the display will
return to the start of the Span Cal menu.
If the
OUT OF RANGE
error occurs, it means the Span Cal cannot be performed
because it would result in an out of range slope value for the monitor. This means
that either the sensor in the monitor is malfunctioning, causing improper readings,
or the actual ozone concentration being supplied to the monitor is different than the
target value being entered.
NOTE
A Span Calibration should only be performed with a precision source
of ozone calibration gas, such as a Teledyne API Model 700 or Model
703 calibrator. Simple ozone generators without a measurement
feedback system should never be used for performing span calibrations.
If you are unsure regarding the suitability of a particular source of
calibration gas, contact Technical Support at Teledyne API for
assistance.
Содержание 465L
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