This field is used to perform a span calibration and should be only
used when a known concentration of span gas is running through
the measurement cell and the reading is stable.
Activating the span calibrate field for a named gas will open a
dialog box. Enter the concentration of the span gas that the
instrument is sampling and press Accept.
This command is used to correct the zero calibration setting. This
option should be used only when zero gas is running through the
measurement cell (refer to Section 5.4 before using this
command).
Pressure Calibration Menu
Ozone Calibration Menu
[IZS option]
Flow Calibration Menu
[Internal pump option]
This field displays the cell pressure measured during the last
calibration.
Chassis temperature when the last span calibration was
performed.
3.4.10.1 Manual Mode
These items appear in the Calibration Menu when Cal. Type is set to Manual.
When calibration type is set to Manual the instruments
operational mode can be chosen from the following:
▪ Measure: Is the normal measurement through the sample port.
▪ Zero: This mode will take air through the calibration port so that
a zero calibration can be performed. Data is flagged as zero
data.
▪ Span: This mode will take air through the calibration port so
that a span calibration can be performed. Data is flagged as
span data.
▪ Cycle: Performs a zero and a span calibration mode and returns
to measure mode. The length of time spent measuring each
calibration mode is set in Cycle Time (refer to Section 3.4.10).
While the instrument is still in the warm-up period (refer to
Section 3.1) the Cal. Mode cannot be changed from Measure
mode.
3.4.10.2 Timed Mode
These items appear in the Calibration Menu when Cal. Type is set to Timed.
Enter the date for the next calibration to start.
Enter the time that calibration will be performed. The time is set
using a 24 hour clock.
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