HF Scientific CLX User Manual

CLX (4/18) Page 24
REV 6.0
9.0 Troubleshooting
9.1 CLX Fault Detection
The CLX performs continuous diagnostic monitoring. In the CLX, there are 4 severity
levels of fault detection. Level 4, 3 & 2 will allow normal operation, but warn of the
problem. Level 1 is an instrument failure and the instrument will not operate. Any faults
are displayed in a queue form in the bottom row of the LCD.
A level 4 fault is simply a screen indication that one of the alarm levels has been
activated. This fault level will not affect the 4-20 mA and will only affect the alarm
activated. The sample back light blinks at a rate of once every 4 seconds.
A level 3 fault indicates a failure or a problem that usually can be corrected by the
operator. Refer to the chart below. If any of these errors occur, the instrument will still
display readings and probably will operate correctly. These faults will self-clear when the
problem is corrected. If any of these faults occur, they may affect the 4-20mA and any
alarm dependent on fault detection setting (Error). See sections 7.2 & 7.4.1 for error
settings. The sample back light blinks at a rate of once every 2.5 seconds to indicate a
level 3 fault.
Level 3 (Self-Clearing) fault conditions
Message
Description of Fault
Corrective Action
MA
4-20 mA enabled & loop open
Check 4-20 mA wiring or turn off 4-
20mA if not used
CAL
Calibration invalid –not accepted
Recalibrate if needed
WATR
No water flowing
Check water flow
FAST
Intake water flow too fast
Set flow rate (see section 9.2)
SLOW
Sample cuvette filling too slowly
Set flow rate (see section 9.2)
PURG
Sample cuvette has slow purge
Check drain lines
NPRG
Sample cuvette not purging
Check drain lines
ISOL
Problem with intake solenoid
Check wiring, check for clogged solenoid
PSOL
Problem with purge solenoid
Check wiring, check for clogged solenoid
GLAS
Dirty cuvette
Replace or clean cuvette
WCAL
Water Level Calibration Invalid
Clear fault (see section 9.3)
A level 2 fault indicates a severe problem that will usually require technical assistance
from HF scientific customer service (see section 9.5). The queued display will show
POST. If this fault occurs it will affect the 4-20mA and any alarm set for fault detection
(Error). The sample back light blinks at rate of once every 1 second.

HF Scientific CLX Specifications

General

Brand	HF Scientific
Model	CLX
Category	Measuring Instruments
Language	English