GE AquaTrans AT868, User Manual

Page: 79 / 158

Diagnostics 6-1
September 2004
Introduction
This chapter explains how to troubleshoot the Model AT868 if
problems arise with the electronics enclosure, the flowcell, or the
transducers. Indications of a possible problem include:
•
display of an error message on the LCD screen
•
erratic flow readings
•
readings of doubtful accuracy (i.e. readings that are not consistent
with readings from another flow measuring device connected to
the same process).
If any of the above conditions occurs, proceed with the instructions
presented in this chapter.
Displaying Diagnostic
Parameters
The Model AT868 has built-in Diagnostic Parameters to aid in the
troubleshooting of flowcell, transducer and/or electrical problems. To
access these parameters, do the following (refer to Figure A-2 on
page A-2 in Appendix A,
Menu Maps ):
Accessing the Display
Submenu
1.
Press
[ESC]
,
[ENTER]
,
[ESC]
. The meter enters the user program.
2.
Press [
X
] until
PROG
appears and press
[ENTER]
.
3.
Press [
X
] until
GLOBL
appears and press
[ENTER]
.
4.
Press [
X
] until
I/O
appears and press
[ENTER]
.
5.
Press [
X
] until
LCD
appears and press
[ENTER]
.
Configuring the Display
1.
At
# of LCD PARAMS
, press [
X
] to select the desired number of
parameters to be sequentially displayed and press
[ENTER]
.
For a 1-channel/path AT868, proceed to Step 3. For a 2-channel/path
meter, proceed to Step 2.
Note:
If you select
OFF
, the meter returns to the
Global I/O
window.
Go to Procedure Options on page 6-3.
2.
Press [
X
] to select the desired channel/path option and press
[ENTER]
.
3.
At
Measurement Name
, press [
X
] to select the desired parameter
(refer to Table 6-1 on the next page for a list of available
diagnostic parameters) and press
[ENTER]
.