4 diagnostic chart, Symptom, Cause – Xylem CL500 ONLINE CHLORINE ANALYZERS User Manual
Page 29: Readings are erratic, 1) bubbles in solution, 1) see above, Readings are lower than expected, 3) reagents bad or expired, 1) install desiccant cartridge kit, Upper display flashes
CL500 (2/08)
Page 25
REV 2.0
9.4 Diagnostic Chart
Symptom Cause Cure
Lower display shows MA
4-20 mA loop open
Check wiring. See sections
4.3.4 and 7.2
Lower display shows FAIL
Major system fault
Refer to section 9.1
Readings are erratic
(1) Bubbles in solution
(2) Debris in flow
(1) See above
(2) Install T strainer at inlet
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 CL500 to post a
reading
9.5 Technical and Customer Assistance
If for any reason assistance is needed regarding this instrument please do not hesitate to
contact Global Water’s Customer Service Department:
Global Water Instrumentation
11390 Amalgam Way
Gold River CA 95670
Phone: (800) 876-1172
Fax: (847) 672-9988