YOKOGAWA WE430, Руководство пользователя, Страница: 67 / 73

<6. Troubleshooting>
6-6
IM 12Y18A03-01EN 1st Edition : Oct. 04, 2019-00
6.2.3 Troubleshooting Matrix
Malfunction Possible Cause Remedy
Noisy Blocked junction on reference electrode Make sure electrolyte is flowing properly and the
bottle is pressurized by the air pump.
Iodide or reference electrode failure Check the cable connections and location of
wiring to terminal strip. Refer to Chapter 2.
Temperature probe failure Disconnect ATC. Temperature should read 25 °C
(E101). Replace if necessary.
Air pump failure Check the air flow for a steady stream of bubbles
and replace if necessary.
Calibration standard carryover Disconnect the air pump intake tube. Rinse the
flow cell and electrodes with deionized water by
lifting the flow cell cap. Reconnect the air pump.
Faulty electrode cables Replace electrode cables.
Excessive Drift Sample concentration varying Check sample status. Perform a span check and
if span check passes, the analyzer is okay.
Blocked junction on reference electrode Make sure electrolyte is flowing properly and the
bottle is pressurized by the air pump.
Iodide or reference electrode failure Check the cable connections and location of
wiring to terminal strip. Refer to Chapter 2.
Reference electrode filling solution
empty or incorrect solution used
Use Cat. No. 181073 reference electrode filling
solution.
Diffusion tubing burst Observe the liquid level in the reagent bottle. If
the liquid level rises, replace the reagent and
diffusion tubing. The tubing connector may need
replacement. Refer to Chapter 2.
Temperature probe failure Disconnect ATC. Temperature should read 25 °C
(E101). Replace if necessary.
Temperature probe failure Disconnect ATC. Temperature should read 25 °C
(E101). Replace if necessary.
Low Flow Rate Sample pressure below 8 psi Check the sample pressure. If it is less than 8 psi,
increase the pressure. Refer to Chapter 2.
Pressure regulator set too low Increase the pressure by pulling on the red
locking ring and turning the black knob clockwise.
Refer to Chapter 2.
Inlet filter clogged Replace or clean the filter.
Restrictor tubing crimped or clogged Replace the restrictor tubing. Refer to Chapter 2.
No Air Bubbles Air line crimped or disconnected Check the air line and repair as required.
Air pump failure Replace if necessary.
Does Not
Calibrate Properly
Contaminated standard or syringe Use new standard solutions. Replace the syringe.
Sample used for calibration contains an
oxygen scavenger.
Oxygen scavenger-free sample must be used for
calibration. Refer to Chapter 4.
Temperature probe failure Disconnect ATC. Temperature should read 25 °C
(E101). Replace if necessary.
Dynamic calibrator technique error Use the correct techniques. Refer to the Chapter
4.
Reagent diluted or contaminated Replace the reagent. Refer to Chapter 2.
Flow cell contaminated Rinse the flow cell with deionized water. Flush the
flow cell overnight at calibration liquid level. Refer
to Chapter 4.
Electronics failure or bad setup Reset the analyzer. Refer to Chapter 6.
Electronics failure or bad setup Reset the analyzer. Refer to Chapter 4.
High Readings Analyzer out of calibration Recalibrate the analyzer. Refer to Chapter 4.
Flow cell contaminated Rinse the flow cell with deionized water. Flush the
flow cell overnight at calibration liquid level. Refer
to Chapter 4.
Inlet filter just replaced Flush the analyzer for one hour. Refer to Chapter
4. If an offline calibration was performed, verify
accuracy of alternate method value. Refer to
Chapter 4.
Reagent spent or diluted Replace the reagent. Refer to Chapter 2.