September 2007
6-8 General Programming
BACKGROUND GRID
Option
Prior to shipment, the XMO2 factory calibration data is programmed
into the Background Grid menu. If the XMO2 displays erroneous
readings, verify that the calibration data in the Background Grid
menu matches that on your calibration data sheet (see page 8-6 for a
sample sheet). If the data does not match, contact the factory.
IMPORTANT: Always consult the factory before proceeding with
this option.
The Background Grid option is used to enter calibration data for an
XMO2 that is configured with background gas compensation. Data is
entered as a series of calibration curves, each of which represents a
particular background gas (the data for your curves is supplied on an
XMO2 calibration sheet similar to the one shown on page 8-6). To
use the Background Grid option, refer to the menu map in Figure C-2
on page C-2 and complete the following steps:
Note: The Background Grid option appears only if Pressure
Compensation is
OFF and Background Compensation is ON,
as specified in the System Mode menu (see page 6-4).
At the # Curves prompt, specify the number of calibration data curves
to be entered. Each curve represents a specific concentration of a
particular background gas.
IMPORTANT: The # Curves for your unit is listed on its calibration
data sheet (see page 8-6 for a sample sheet), and the
value should not
be changed.
The next prompt appears only if the Display Background Gas option
is enabled in the Set Background Display branch of the Advanced
Menu (see Chapter 7, Advanced Programming). The Curve #n
prompt allows you to enter a fixed background gas concentration for
one of the curves in the background grid.
Note: The gas type displayed in the Curve #n prompt is specified in
the Select Gas Type option of the Advanced Menu. The
choices are %Bkgd (generic), %H2, %N2 (used as an example
in this manual), %SO2, and %CO2. Refer to Chapter 7,
Advanced Programming, for more details.
CALIBRATE SYSTEM
Press [Y] or [Enter] to enter the
Background Grid menu.
Background Grid?
CALIBRATE GRID
Accept the current value by
pressing
[Y] or [Enter].
# Curves [x]:
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