Introduction; Displaying Diagnostic Parameters - GE DigitalFlow GC868 Service Manual

Introduction

Displaying Diagnostic
Parameters
Diagnostics
This chapter explains how to troubleshoot the Model GC868 if
problems arise with the electronics console, the flowcell, or the
transducers. Indications of a possible problem include:
•
display of an error message on the active display 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.
The Model GC868 has a built-in Diagnostics Menu to aid in the
troubleshooting of flowcell, transducer and/or electrical problems.
The Diagnostics Menu may only be entered from the Big or Dual
measurement mode display. See Chapter 2, Displaying Data, in the
Programming Manual for instructions on setting the display screen to
the desired format, and enter the Diagnostics Menu as shown below.
1. For a 2-channel GC868, press the
desired channel option appears on the option bar. Press the
[Fx]
appropriate key to select this option.
Note: For a 1-Channel Model GC868, the above prompt does not
appear, and the following prompt is the initial screen.
←] or [→] keys until
[
2. Press the
Press the appropriate
Note: Ch1 (or Ch2), which is shown in parentheses above, appears
in the locator bar only with a 2-Channel Model GC868.
[F1]
For example, pressing
the following prompt.
Ch1 label gSITE
Ch1 DN Transit usec
519.7
(error codes appear here)
Tdown DELTA PEAK%
←] or [→] keys until the
[
DIAG
appears on the option bar.
[Fx]
key to select this option.
Tdown
displays the parameter, as shown in
Press the [←] and [→] keys and
the appropriate
display a different diagnostic
parameter or to
Diagnostics Menu.
Qup
April 2008
[Fx]
key to
EXIT
the
3-1