<2. Analyzer Preparation>
2-9
IM 12Y18A03-01EN
1st Edition : Oct. 04, 2019-00
2.8
Installation of a New Reference Electrode
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.
1. Unpack the reference electrode (Part number: K9705CH) from the shipping box.
2. Carefully remove the protective caps from the bottom and sidearm of the reference
electrode. Save the caps for future storage of the electrode.
Electrode Sidearm
Ceramic Frit
Reference Electrode
Filling Solutuin
Gasket
Tubing Bottle Adaptor
Small 1/8” Tubing Inside
Bottle Cap
Large 1/4” Tubing
Figure 2.9 Reference Electrode with Filling Solution
3. Shake out as much of the fill solution as possible through the sidearm. Drain the fill solution
through the sidearm or use a pipet or syringe.
4. While passing the 1/8 inch tubing into electrode sidearm, slide the 1/4 inch tubing over the
sidearm. The outside tubing should extend 3/8 to 1/2 inches over sidearm. Refer to Figure
2.9.
5. Remove the cap and fluid seal from reference electrode fill solution bottle (Cat. No. 181073).
Hold the bottle in an upright position. Check that the rubber gasket is properly aligned, and
then connect the cap end of the tubing assembly to the bottle. The 1/8 inch tubing should
extend into the bottle.
6. Hold the reservoir bottle above the electrode with the bottle cap end down. The electrode
should be horizontal with the sidearm pointing up. Gently shake the electrode to allow any
trapped air bubbles to rise into the bottle as the electrode fills with solution.
7. Dry off the ceramic frit on the base of the electrode with a lint-free wipe. Squeeze the bottle
for a few seconds. A small amount of filling solution should bead up on the frit surface,
indicating good filling solution flow. If no moisture is visible, the electrode is clogged and
should be cleaned or replaced.
8. Invert the electrolyte bottle and snap it into the clip. Refer to Figure 2.10. Locate the
discharge tube of the air pump on the fluidics panel. The end of the tubing has a hollow
push pin for pressurizing the reference reservoir. Puncture the base of the bottle with the
pin and push the pin down until its PVC base abuts the bottle. Mark and date the level of
filling solution in the reservoir. The electrolyte solution will begin to flow into the reference
electrode.