GE DigitalFlow GS868, Service Manual

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DigitalFlow™ GS868 Service Manual 25
Chapter 3. Diagnostics
Chapter 3. Diagnostics
3.1 Introduction
This chapter explains how to troubleshoot the Model GS868 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.
3.2 Displaying Diagnostic Parameters
The Model GS868 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.
Note:
For a 1-Channel meter, the above prompt does not appear, and the following prompt is the initial screen.
Note:
Ch1 (or Ch2), which is shown in parentheses above, appears in the locator bar only with a 2-Channel Model
GS868.
Ch1 label gSITE Press the

]
or

keys until the desired channel option appears on the
option bar. Press the appropriate
[Fx]
key to select this option.
Ch1 Velocity Ft/s
6.95
(error codes appear here)
CH1 CH2 SUM DIF
(Ch1) label gSITE Press the

]
or

keys until
DIAG
appears on the option bar. Press the
appropriate
[Fx]
key to select this option.
Velocity Ft/s
6.95
(error codes appear here)
TIME DIAG