GE XMO2, User Manual

Page: 128 / 196

Advanced Programming 7-13
September 2007
GAS VALUE EXP FILTER
Option (cont.)
The Set Tau(up) option (cont.):
You may now do one of the following:
•
Press
[N]
as many times as necessary to select another Gas Value
Exp Filter 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 Gas Value Exp
Filter menu, then press
[Y]
to return to the Calibrate System menu.
The Set Tau(down) option:
The Tau(down) parameter is the diffusion constant of the background
gas into oxygen. Its default value is 27.0, but values of 15.0-35.0 are
acceptable (oscillation increases as the value increases). To set this
parameter, proceed as follows:
You may now do one of the following:
•
Press [N] as many times as necessary to select another Gas Value
Exp Filter 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 Gas Value Exp
Filter menu, then press [Y] to return to the Calibrate System menu.
Gas Value Exp Filter:
You have now completed the
programming of this submenu.
Set Tau(up)?
Gas Value Exp Filter:
Press
[N]
until this prompt
appears, then press [Y] or [Enter] .
Set Tau(down)?
Tau(down) Value:
To accept the current value, press
[Y]
or
[Enter]
. To change the
current value, use the numeric
keys to enter a new value and
press
[Y] or [Enter] twice.
Tau [xx.x]
Gas Value Exp Filter:
You have now completed the
programming of this submenu.
Set Tau(down)?