GE XMO2, User Manual

Page: 125 / 196

September 2007
7-10 Advanced Programming
O2 INPUT Option (cont.)
The Set AutoZero Value option (cont.):
You may now do one of the following:
•
Press
[N]
as many times as necessary to select another O2 Input
menu option. Then, press [Y] and proceed to the appropriate
section of this chapter for instructions.
•
Press
[N]
until you reach the Done? option of the O2 Input menu,
then press
[Y]
to return to the Calibrate System main menu.
The AutoZero Bridge option:
This option is used to zero the measurement bridge with a 0.000%
oxygen gas, such as nitrogen. The bridge should be calibrated if the
O2 mV value from the test inputs reads -512 mV or if nitrogen
readings are in error by ±5% or more. The bridge calibration may
have shifted due to high pressure, high flow rate or a power surge.
IMPORTANT:
The AutoZero Bridge? option is run at the factory
during system setup. Do not rerun this option without
first consulting the factory.
Connect a source of the chosen zero gas (typically nitrogen) to the
XMO2 inlet. Allow the zero gas to flow at a rate of 1 SCFH and at
atmospheric pressure for at least 3-5 minutes. Then, to reset the
bridge calibration to 0.00%, proceed as follows:
You may now do one of the following:
•
Press
[N]
as many times as necessary to select another O2 Input
menu option. Then, press
[Y]
and proceed to the appropriate
section of this chapter for instructions.
•
Press
[N]
until you reach the Done? option of the O2 Input menu,
then press
[Y]
to return to the Calibrate System main menu.
Adjust Zero:
You have now completed the
programming of this submenu.
Set AutoZero Value?
Adjust Zero:
Press
[N]
until this prompt
appears, then press [Y] or [Enter] .
AutoZero Bridge?
This prompt is displayed until the
bridge is zeroed.
Working...
Adjust Zero:
You have now completed the
programming of this submenu.
AutoZero Bridge?