Hanna Instruments HI 84181 User Manual

Page 18

PERIODIC MAINTENANCE
Inspect the electrode and the cable. The cable used for connection to the instrument must be

intact and there must be no points of broken insulation on the cable, or cracks on the electrode

stem or bulb. Connectors must be perfectly clean and dry. If any scratches or cracks are present,

replace the electrode. Rinse off any salt deposits with deionized water.

Add filling solution dosing to maintain a good head pressure. For optimal electrode response this

level should be maintained and not be allowed to drop more than 2-3 cm (1 inch below fill hole).
STORAGE PROCEDURE
The HI 61014 sensor can be stored in standards for short periods of time and should be stored

dry with the protective cap on, when not in use, for long periods of time.

The HI 5315 reference electrode may be stored in air or aqueous solutions between sample

measurements.

If the electrode will be used frequently and needs to be ready for use, take measures to prevent

evaporation of fill solution. Top off fill solution, replace o-ring, fill hole cover on the fill hole

opening, and place protective cap over junction tip. Store the electrode upright. Before using,

flush junction once and top off fill solution.

For long term storage, disassemble electrode and wash all salts from assembly with deionized

water. Wrap ceramic junction on inner stern in Parafilm

or other sealing film. Store dry and

disassembled.
MALFUNCTIONING
Reading fluctuates or drifts:

Could be due to dirty or blocked reference electrode junction: follow the cleaning procedure

above. Repeat the measurement with a fresh potassium electrode.

Recommendations for Users
Before using this product, make sure that it is entirely suitable for your specific application and for the environment in which it is
used.
Operation of this instrument may cause unacceptable interferences to other electronic equipments, this requiring the operator to
take all necessary steps to correct interferences.
Any variation introduced by the user to the supplied equipment may degrade the instrument EMC performance.
To avoid damages or burns, do not put the instrument in microwave ovens. For yours and the instrument’s safety do not use or
store the instrument in hazardous environments.

Hanna Instruments reserves the right to modify the design, construction and appearance of its products

without advance notice.

• Add 1 mL of HI 84181-1 Standard. Record the mV value when stable.

• Add an additional 10 mL of HI 84181-1 Standard to the solution. Wait for the reading to

stabilize and record the mV value.

• The difference between the two recorded mV values give the slope of the electrode. An

acceptable value for this slope is 53 ± 4 mV.

• Press ESC to leave the reading check mode.