INFICON UL5000 Dry Helium Leak Detector - Manual (Page 82)

82
Error And Warning Messages
iina
74
e 0
8
.f
m
te
chn
ica
l ha
nd
boo
k
(1
40
8)
8 Error And Warning Messages
The UL5000 is equipped with a comprehensive self-diagnostic facilities. If an error or
warning condition is detected it is indicated via the LC display to the operator.
An audio signal is generated when an error or warning occurs. The frequency
changes every 400 ms from 500 Hz to 1200 Hz and vice versa so that the signal
stands out well from ambient noises normally encountered.
Error and warning messages are logged and can also be displayed at a later time
through the menu information (See Chapter
6.7 )
8.1 Hints
Warning Messages
Warnings will be indicated
• when the UL5000 detects an abnormal condition or
• when it wants to remind the operator of something (e.g. a request for calibration
or a service timer has expired).
The UL5000 will indicate a message on the LC display and will remain in the Stand-
by or the measurement mode.
Warning messages will remain on the LC display until the warning has been acknow-
ledged by pressing „OK“ (Key no. 8). After that the UL5000 can be used again
(possibly with some restrictions). As long as a warning status exists the status line
shows a warning triangle (See Chapter
5.4.3 ).
The warning messages can be displayed in STANDBY by pressing the button
(shows up when warning message occured).
Error Messages
Errors are events which force the UL5000 to interrupt its measurement operations.
In this case the UL5000 closes all valves (Stand-by mode).
Error messages remain on the LC display until the message has been acknowledged
by pressing „Restart“ (key no. 8). After that, the UL5000 restarts with a new run-up
procedure. In some cases it may be helpful to check some settings or measured
values before the UL5000 restarts. Therefore it is also possible to press „Menu“ (key
no. 4 or Menu key) to enter the UL5000 menu. After leaving the menu the same error
message will be displayed again.
Notice: Under extreme conditions (unknown software errors, excessively high
electromagnetic interference levels) the built-in „watchdog“ circuit will
prevent uncontrolled operation of the UL5000. This watchdog will cause
the UL5000 to restart. After having done so, the instrument will be running
in the Stand-by mode. No error message will be output.