Appendix C - Troubleshooting; Analyzer Malfunction; Calibration Errors And Noisy Or Incorrect Readings - ABB Navigator 600 Silica User Manual

Navigator 600 Silica
Single-stream
Appendix C – Troubleshooting
C.1 Analyzer Malfunction
For the analyzer to function correctly and to specification, the
following conditions must be met:

The correct reagents and calibration solutions must be
connected.

The order that the reagents are introduced into the
reaction block must be correct.

The flowrate of all solutions must be correct.

The analyzer's electronics (transmitter and optical
measuring device) must be functioning correctly.
C.2 Calibration Errors and Noisy or Incorrect Readings
Symptom Action
Failing calibration Check the system for visible air bubbles – see Section C.2.1, page 75
(calibration
Check that reagents enter the reaction block in the correct order – see Section C.2.3, page 77
parameters
Check reagents are correct – see Section C.2.3, page 77
consistent from one
calibration to the
Check solution flowrates – see Section C.2.3, page 77
next)
Check operation of zero and secondary calibration valves – see Section C.2.4, page 78
Check mV values from the optical system – see Section C.2.2, page 76
Failing calibration Perform a Noisy readings check – see below
(calibration
Check operation of zero and secondary calibration valves – see Section C.2.4, page 78
parameters vary from
Note. If a zero calibration is carried out on a sample with very high silica levels, the zero offset is
one calibration to the
affected; this can result in low value samples reading zero or lower than expected.
next)
Check mV values from the optical system – see Section C.2.2, page 76
Incorrect readings Check the functionality of the Cleaning and Secondary calibration valve:
(Calibrations pass
with consistent
results)
If no problems can be found, it suggests that the laboratory method could be inaccurate.
Noisy / unstable Check the system for visible air bubbles – see Section C.2.1, page 75
readings
Check mV values from the optical system for stability – see Section C.2.2, page 76
Check solution flowrates – see Section C.2.3, page 77
74
1. Disconnect the cleaning solution tube from the clean valve manifold and check if the reading
changes after 30 minutes to 1 hour. If it does, the problem is likely to be a leaking clean valve.
Replace the valve (see Appendix H, page 87 – part number AW600034).
2. Disconnect the secondary calibration solution tube from the calibration valve manifold and check if
the reading changes after 30 minutes to 1 hour. If it does, the problem is likely to be a leaking
calibration valve. Replace the valve (see Appendix H, page 87 – part number AW600034).
Virtually all problems with the analyzer are as a result of 1 or
more of these not being correct. For troubleshooting it is
important to remember the basic analyzer functionality with
respect to the 4 conditions above.
Appendix C – Troubleshooting
IM/NAV6S/SS–EN Rev. E