<5. Analyzer Maintenance>
5-1
IM 12Y18A03-01EN
1st Edition : Oct. 04, 2019-00
5. Analyzer Maintenance
5.1
Maintenance Schedule
The WE430 Hydrazine analyzer is designed for simple maintenance. Follow the instructions in
this section to ensure proper operation of your analyzer.
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Recommendations
To ensure proper maintenance and good analyzer performance, a service logbook should be
kept.
• Record maintenance date and the type of service work completed.
• Mark the date and the fluid levels of the reagent and the date when it was replaced.
• Tag each electrode cable with the installation date of the electrode.
5.2
Weekly Maintenance
1. Check that the sample flow rate is 35 to 45 mL/minute. To alter the flow rate, pull out the
locking knob of the pressure regulator, then rotate the black knob to increase (clockwise) or
decrease (counterclockwise) sample flow. Push in the locking knob of the pressure regulator
to lock the flow rate.
2. Inspect the analyzer for leakage. Diffusion tubing leakage is indicated by a rise in the level of
reagent.
3. Check that there are no error indications and that the current concentration level is
reasonable.
4. Check that the reference filling solution is adequate.
5. If required, wipe the analyzer with a damp cloth to remove dirt and dust particles.
5.3
Bi-Weekly Maintenance
Refer to Section 2.8, Installation of a New Reference Electrode.
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Reference Electrode Filling Solution Replacement
WARNING
Turn off the air pump prior to removing the reference electrode filling solution bottle. If the air
pump is left on, it will spatter filling solution as the bottle is removed.
The reference electrode filling solution needs to be replaced approximately every two weeks. If
the reservoir is less than one quarter full, replace the solution. This should be checked every two
weeks to ensure that the electrode does not run dry.
1. Remove the spent electrolyte bottle from the clip. Unscrew the cap and discard the bottle.
2. Remove the cap and seal from the new reference electrode filling solution. Check that the
rubber gasket is properly aligned and then connect the cap and tubing assembly to bottle.
The 1/8’’ tubing should extend into the bottle.
3. Invert the electrolyte bottle and snap it into the clip.
4. Use the special pushpin attached to the pressurized reference assembly on the analyzer to
pierce a hole in the bottom of the bottle and re-pressure the reservoir by the air pump.
5. Dry the frit at the base of the reference electrode. Check the frit to see if a bead of fill
solution forms, which indicates good electrolyte flow.