Instruction manual

USING THE ELECTRODE

Electrode Preparation

1. Remove the protective shipping cap from sensing element and

save for storage.

2. Clean any salt deposits from exterior by rinsing with

distilled water.

3. Uncover filling hole by removing plastic sleeve and add ROSS

™

Internal Filling Solution, Orion 810007, to electrode.

See Figure 2.

To maintain an adequate flow rate, the level of filling solution

must cover the end of coil and be at least one inch above the

sample level when immersed. The filling hole should be open

whenever the electrode is in use.

4. Thoroughly wet the junction by pressing down on the electrode

cap and allowing some of the ROSS Internal Filling Solution to

flow out of the electrode through the junction. Replenish lost

filling solution. See Figure 3.

5. Shake down the electrode (as a clinical thermometer) to

remove air bubbles.

6. Soak combination electrode and/or pH half cell in pH Electrode

Storage Solution, Orion 910001, for one hour. Reference

electrodes do not need to be soaked. If Orion pH Storage

Solution is not available, use 200 mL pH 7 buffer to which

about 1 g KCl has been added, as a

temporary substitute.

7. Connect electrodes to meter.

Figure 2: Filling the ROSS Sure-Flow Electrode