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Section 14 Maintenance and Troubleshooting
14.1 Instrument maintenance
14.2 Troubleshooting
The possible events, along with the text message displayed on the instrument numeric view
screen, the reason for the event and its criticality are listed in
Table 4 on page 92 . An event is
something which affects the measurement. In the numeric view, the current events are indicated
with the gas concentration at the same place.
Whenever an abnormal event is met, a sign is displayed on the upper left of the screen.
Pressing on the sign calls a window giving further details about the actual situation.
There are three levels of abnormal conditions:
Note:
Use the Diagnostic view for troubleshooting. Refer to Sensor diagnostics on page 87 .
Note:
If the RTC battery is running low, the date and time of the instrument are reset. Also, on startup the
instrument will automatically reboot after the initial startup is complete.
CAUTION
Personal Injury Hazard. Any instrument maintenance should be carried out by a qualified
Hach Lange Service Technician. Please contact your local representative should you feel any
maintenance or instrument adjustments are required
• Alarm
- There is a severe problem causing the channel to
be out of action, and the system alarm relay to be enabled
• Warning
- Events less critical than a system alarm (e.g.
measurement alarm)
• Information -
For information only; no action is required
In addition to the above, if the RTC battery is running low and needs to be
changed, the icon illustrated left is displayed in the bottom right corner of the
numerical view screen.
If using a portable instrument, this icon blinks alternatively with the standard
battery icon.