Select whether the instrument will sample from the external
calibration port or from the internal zero source when zero gas is
requested.
The duration of each Cal. Mode (span and zero) when performing
Cycle Mode (refer to Section 3.4.10.1) or Cal. Type is set to Timed.
(refer to Section 3.4.10.2)
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).
Immediately perform a background.
Pressure Calibration Menu
Flow Calibration Menu
[Internal Pump Option]
This field displays the cell pressure measured during the last
calibration.
Cell 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.
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