18
Symptom
Cause
Cure
Lower display shows
MA
4-20 mA loop open
Check wiring. See sections
4.4.4 and 8.1
Lower display shows
FAIL
Major system fault
Refer to section 10.1
Readings are erratic
(1)
Bubbles in solution
(2)
Debris in flow
(3)
Bad or sticky check valves
(1)
See above
(2)
Install T strainer at inlet
(3)
Flush check valves as
described in section 10.4
or replace the valves
Readings are lower than
expected
(1)
Condensate or leaky
measurement cuvette
(2)
Measurement cuvette dirty
(3)
Reagents bad or expired
(4)
Buffer reagent not being
dispensed
(1)
Install desiccant cartridge
kit
(2)
Replace or clean cuvette
(3)
Replace reagents
(4)
Check buffer lines and
check valves
Upper display flashes
Sample Over-Range
Check sample. Sample may
be too high to read
Upper display shows
nOnE while attempting
to calibrate
No current reading displayed
Wait for CLX-Ex to post a
reading
10.5 Diagnostic Chart
10.6 Technical and Customer Assistance
If for any reason assistance is needed regarding this instrument please
do not hesitate to contact either the HF scientific Technical Service
Department or the HF scientific Customer Service Department:
HF scientific
16260 Airport Park Drive, Suite 140
Fort Myers, FL 33913
Phone: 239-337-2116
Toll Free: 888-203-7248
Fax: 239-454-0694
Email: [email protected]
Website: www.hfscientific.com
11.1 Maintenance Schedule
The recommended schedule is shown below. It is important to replace
the reagents to get reliable accurate readings from the CLX-Ex. The
Buffer supplied can last for up to one year. Each mixed indicator
reagent will last for up to 90 days* when kept in the special cooling
chamber. The one year kit includes one buffer bottle and four sets of
indicator reagents. The Buffer reagent is mounted in a clip and is further
held with a Velcro strap. The indicator reagent is in a 125ml bottle
that is placed inside the cooling chamber. See section 11.2 for more
information on the reagents.
The CLX-Ex is shipped with one CLX-Ex Tubing/Cuvette kit, HF
scientific Catalog # 09950EX. The kit consists of the following:
Qty
Part
1
Spare Buffer Cap Assembly
1
Spare Indicator Cap Assembly
8
Pump Tubes
1
Spare Cuvette
Two replacement sets of reagent cap/tubing assemblies are supplied
with the CLX-Ex; one for the buffer and one for the indicator.
Additional kits can be ordered from your local HF scientific distributor or
representative. It is recommended to keep one kit on hand at all times.
Generally, both pump tubes should be replaced annually. Spare cap
assemblies for both the buffer and the indicator are supplied and can
be replaced when needed.
Every 90 days
1. The indicator reagent required for operating this instrument must be
changed at least every 90 days. The buffer reagent can be used up
to one year.
2. The internal strainer should be checked and cleaned if necessary.
3. The glass cuvette should be inspected. Check for excessive debris
on the inside surface of the glass. It is suggested to keep a spare
cuvette to replace when required. The old cuvette may be cleaned, if
possible, for future replacement.
Flushing the System
Press the SERVICE button to stop the water flow. Remove old reagents
and discard. Place the suction tubes in a small container of clean
water. Press SERVICE to return to operation mode, press PRIME and
then
to flush the system with water. Remove the suction tubes from
the water Press PRIME and then
to remove most of the water.
NOTICE
After a PRIME the CLX-Ex will perform a water calibration (WCAL).
It will take a few minutes to complete this procedure.
*The 1 year buffer and 90 day indicator reagent life is primarily used on
ballast water applications. The assumption is based on the factory default
of a 60 second cycle and up to 60 hours total operation per month.
11.0 Routine Maintenance
Only access when the atmosphere has been tested and known to
be safe.
WARNING
!
Please note that to perform these maintenance
operations the cabinet door must be open and the
instrument in maintenance bypass mode. See section
5.3 for more information on this.
Specific condition of use: Parts of the enclosure are non-conducting
and exceed the maximum permissible resistance according to the IEC
60079-0. Therefore, to avoid electrostatic charge build-up, it must not
be rubbed or cleaned with solvents or a dry cloth when installed/used
within a potentially explosive atmosphere.
NOTICE
