GE AquaTrans AT868, User Manual

Page: 46 / 158

Programming Site Data 2-21
September 2004
Selecting Transmitter Code
Length - CODEL
Use this option to select the size of the transducer transmission signal.
This option is helpful when measuring flow on small pipes. Complete
the following steps to select the code length.
1.
Press
[ESC]
,
[ENTER]
,
[ESC]
. The meter enters the user program.
2.
Press [
X
] until
PROG
appears and press
[ENTER]
.
3.
Press [
X
] until the desired channel appears. Press
[ENTER]
at
CH1
or
CH2
.
4.
Press [
X
] until
SETUP
appears and press
[ENTER]
.
5.
Press [
X
] until
ADVAN
appears and press
[ENTER]
.
6.
Press [
X
] until
CODEL
appears and press
[ENTER]
.
7.
Press [
X
] to select the transmitter code length and press
[ENTER]
.
•
Automatic - the meter will determine the code length (short or
long) automatically based on pipe size and transducer type.
•
Short Code - is only a few pulses with no code pattern built in.
In some cases, the diameter of the pipe is too small which does
not give each transducer the necessary time to send a series of
signals before receiving a series of signals. Short is also a good
selection for pipes made of materials which tend to blur the
signal pattern, such as Teflon
®
.
•
Long Code - is a series of approximately a dozen that have a
distinctive binary pattern which is easily recognizable during
auto correlation.
After completing the above steps, the user program returns to the
original screen. To continue regular programming, refer to Appendix
A,
Menu Maps , to navigate to the desired menu.