38
9. Probe Care
Electrode Activation
DO NOT
touch or rub the glass bulb. If you follow the stor-
ing and maintenance procedure, you can use your electrode
immediately.
If the electrode responds sluggishly or drifts, the bulb may be
dehydrated. Immerse the electrode in an ideal storage solu-
tion such as electrode storage solution or pH 4 buffer solu-
tion for 1-2 hours to hydrate it. See
Storing pH/ORP
electrodes
below.
If this procedure does not hydrate the electrode,
reactivate or replace it.
Use 2 or 3 point calibration to test your electrode perfor-
mance. If you do not get good readings, use a different pH
electrode to confirm the meter is working properly. If the
results are still not satisfactory, consult your OAKTON
distributor.
Electrode Maintenance
pH electrodes are susceptible to dirt dehydration and
contamination. Clean them regularly depending on the
extent and condition of use.
Storing pH/ORP electrodes
For best results, always keep the pH bulb wet, preferably in
pH 4 buffer with 1% saturated KCl. Other pH buffers or tap
water are also acceptable storage solutions. Do not store in
de-ionized water. The protective rubber cap filled with buffer
solution is an adequate method for storing pH electrodes.
OAKTON
®
offers a complete line of low cost electrode stor-
age and cleaning solutions and containers.
After Use
1.
After each series of measurements, wash the
electrode and reference junction in deionized water.
2.
If using a refillable electrode, close the refilling hole by
returning its rubber sleeve or stopper plug over the
opening in the side of the electrode.
See Figure 63.
3.
Store the electrode as mentioned above.
Figure 63
troubleshooting
electrode
care
measurement
calibration
starting up
set up
mode
return of
items
warranty
accessories
specifications
appendixes
