Hanna Instruments HI 5000 User Manual

Page 29

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.

• Dry Membrane/Junction: Soak in Storage Solution HI 70300

overnight. Check to make sure the installation is such as to create
a well for the electrode bulb to constantly remain moist.

• Low Slope: Refer to the cleaning procedure above.
• No Slope: - Check the electrode for cracks in glass stem or bulb

(replace the electrode if cracks are found).

- Make sure cable and connections are not dam-

aged nor lying in a pool of water or solution.

• Slow Response/Excessive Drift: Soak the tip in Hanna Solu-

tion HI 7061 for 30 minutes, rinse thoroughly with distilled
water and recalibrate the meter.

Note: With industrial applications, it is always recommended to keep

at least one spare electrode handy. When anomalies are not
resolved with a simple maintenance, change the electrode
(and recalibrate the controller) to see if the problem is
alleviated.

ACCESSORIES

PREPARATION

Make sure that the protective sleeve is on the probe shaft and that
the air-vent holes are on the top (nearer to the cable).

STORAGE

The conductivity/TDS probes should be stored dry. If the probes are
not to be used for a while, clean and dry them throroughly (see
below) before storing them in a dry store room.

PERIODIC MAINTENANCE

Inspect the probe and the cable. The cable used for the connection to
the controller must be intact and there must be no points of broken
insulation on the cable or cracks on the probe sleeve. If any cracks are
present, replace the probe and cable.
Connector must be clean and dry.

CONDUCTIVITY/TDS PROBE

CLEANING & MAINTENANCE

This manual is related to the following products:

HI 9913 HI 9923 HI 9935