Hach FT660 sc, Basic User Manual

Page: 20 / 68

How to clean spills
C A U T I O N
Chemical exposure hazard. Dispose of chemicals and wastes in
accordance with local, regional and national regulations.
1. Obey all facility safety protocols for spill control.
2. Discard the waste according to applicable regulations.
Troubleshooting
Problem Possible cause Resolution
Low (< 1) or
negative readings Head assembly is not
correctly installed on the
body of the instrument Correctly install the head
assembly on the body of
the instrument. If not, the
red status light will flash.
Laser failure Contact Technical Support.
PMT/Electronics failure
Errors
When an error occurs:
• The reading on the measurement screen flashes.
• All outputs are held.
• The red status light on the instrument turns on.
To access the current instrument errors, select Diagnostics, [Select
Sensor], Error List.
Select an error and confirm to identify the cause of the error. Refer to
Table 2 .
Table 2 Error list
Error Possible cause Resolution
A/D FAILURE A/D conversion failure Contact Technical Support.
LASER FAILURE Laser did not work correctly
and is turned off
FLASH FAILURE Data log and event log not
working
LOW SIGNAL
ERROR Signal is too low (less than
3.0 mNTU) Make sure that the head
assembly is installed
correctly. If not, the red status
light will flash.
Contact Technical Support.
Warnings
When a warning occurs:
• A warning icon flashes and a message is shown on the bottom of the
measurement screen.
• The red status light on the instrument starts flashing.
Warnings do not affect the operation of menus, relays and outputs.
To access the current instrument warnings, select Diagnostics, [Select
Sensor], Warning List.
Select a warning and confirm to identify the cause of the warning. Refer
to
Table 3 .
20 English