User Guide

38
TROUBLESHOOTING
Evaluate your electrode performance based
on the following.
• Noise (Readings fluctuate up and down)
could be due to:
- Clogged/Dirty Junction: Refer to the
Cleaning Procedure above.
- Loss of shielding due to low electrolyte
level (in refillable electrodes only): refill
with fresh HI7071 or HI 8071 for single
junction or HI7082 or HI 8082 for double
junction electrodes.
• Dry Membrane/Junction: Soak in Stor-
age Solution HI 70300 or HI 80300 for at
least 1 hour.
• Drifting: Soak the electrode tip in warm
Hanna Solution HI 7082 or HI 8082 for one
hour and rinse tip with distilled water.
Refill with fresh HI7071 or HI 8071 for single
junction electrodes and HI 7082 or HI 8082
for double junction electrodes.
• Low Slope: Refer to the cleaning proce-
dure above.
• No Slope: Check the electrode for cracks
in glass stem or bulb and replace the
electrode.
• Slow Response/Excessive Drift: Soak
the tip in Hanna Solution HI 7061 or HI 8061
for 30 minutes, rinse thoroughly in dis-
tilled water and then follow the Cleaning
Procedure above.