User's Manual

CLEANING PROCEDURE

Remove the sleeve and soak the probe in a Hanna HI 7061 General

Cleaning Solution for 1 hour.

If the probe has been left in highly concentrated fertilizer solution and

does not seem to become clean, repeat the cleaning procedure.

The rings can also be cleaned with a cloth. Make sure that the cloth

is made of a soft and non-abrasive material and does not scratch the

rings.

IMPORTANT: After performing the cleaning procedure rinse the

probe thoroughly with distilled or tap water. Dry the probe, replace

the sleeve ensuring that the air-vents are nearer to the cable end

and recalibrate the controller.

TROUBLESHOOTING

If the controller does not respond properly or constantly reads zero or

a value close to it, or is in over range, check the probe and cable for

cracks. The cable may be shorted or the probe broken, in which case

they need to be replaced. If the response seems sluggish, follow the

cleaning procedure above.

If there are anomalies such as numbers fluctuating, enure that the

probe has been properly mounted and that it constantly lies in a well

filled with the solution. Air bubbles also disturb the measurements

(especially with HI 3001D) and the probe should be installed in such

a way as to minimize their presence (see Suggested Installations).

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

a spare probe handy. When anomalies are not resolved with a

simple maintenance, change the probe (and recalibrate the

controller) to see if the problem is alleviated.

The electrode should be installed in such a away that it permanently

lies in the solution, whether in a well, tank or on the discharge pipe.

SHORT DISTANCE, INDOOR INSTALLATION

Due to the low currents involved, a very high grade of insulation is

required. A dry environment is needed in order to obtain a level of

insulation not lower than 10

Ω.

This type of connection is very delicate and requires constant attention

to maintain proper operating conditions.

SUGGESTED INSTALLATIONSSUGGESTED INSTALLATIONS

SUGGESTED INSTALLATIONS

for pH ELECTRODEfor pH ELECTRODE

for pH ELECTRODE