Thermo Scientific Orion Double Junction Frit Reference Electrodes

Instruction Sheet
Thermo Scientific Orion Double Junction Frit
Reference Electrodes
Cat. No. 100056 double junction frit reference electrode is used on the 2109XP and
1809A0 fluoride monitors, 2118XP and 1818A0 oxygen scavenger monitors, 2120XP
and 1820A0 calcium hardness monitors, 1810A0 ammonia monitor and 1811A0 cation
sodium monitor. This reference electrode requires Cat. No. 181073 filling solution,
which is orange in color.
Cat. No. 100058 double junction frit reference electrode is used on the 1811EL and
1811LL low-level sodium monitors. This reference electrode requires Cat. No. 150072
filling solution, which is clear in color. The 100058 reference electrode must be used
with the 100048 sodium sensing electrode.
Installation Procedure
1. Unpack the reference electrode and tubing assembly from the shipping box.
Carefully remove the protective caps from the bottom and sidearm of electrode.
Save the caps for future storage of the electrode. Inspect the internal chamber of the
electrode. Verify that the internal chamber is at least half full with the internal fill
solution. If the internal chamber is not at least half full, replace the electrode.
2. Shake out as much of the electrode filling solution as possible through the electrode
sidearm into a sink or other drain.
3. Pass the 1/8-inch tubing into the electrode sidearm and slide the 1/4-inch tubing
over the sidearm. The outside tubing should extend 3/8-1/2-inch over the sidearm.
4. Remove the cap and seal from the electrode filling solution bottle. Hold the bottle
in the 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.
5. 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.
6. Dry off the ceramic frit on base of the electrode with tissue paper. Squeeze the
electrode filling solution bottle for a few seconds. A small amount of filling solution
should bead up on frit surface, which indicates good electrolyte flow. If no moisture
is visible, the electrode is clogged and should be cleaned or replaced.
7. Invert the electrode filling solution bottle and snap it into the clip. Use the supplied
push pin to puncture three air vents on bottom of bottle. Caution: Failure to vent
the electrode filling solution bottle will lead to noisy and drifty output signals.
8. Connect the electrode to the electronic chassis with the cable that is labelled Ref.
Elect. Insert the electrode into the reference hole in the flow cell cap.
9. Mark the level of solution in the electrode filling solution bottle and note the date.
The solution level should be checked monthly and refilled as required. The solution
level should drop at least 1/8-inch per month or erratic monitor readings may result.
Replace the reference electrode filling solution bottle as necessary.
Tubing Bottle
Smaller 1/8”
Inside Tubing
Bottle Cap
Larger 1/4”
Environmental Instruments
Water Analysis Instruments
166 Cummings Center
Beverly, MA 01915 USA
Toll Free: 1-800-225-1480
Tel: 1-978-232-6000
Dom. Fax: 1-978-232-6015
Int’l Fax: 978-232-6031
255052-001 Rev A 1-08
© 2007 Thermo Fisher Scientific Inc. All rights reserved.
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