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The electrode converter (options) is designed for the use of other electrodes, usually
moistureproof and dustproof.
When measuring, remain the wire of the electrode still, otherwise it will cause unstable
measurement.
The instrument used by power supply should be good grounding.
The instrument adopt MOS integrated circuit, so ensure the soldering iron have good
grounding during maintenance.
When using a buffer solution calibration instruments, to ensure the reliability of the
buffer solution, can't match wrong buffer solution, otherwise will lead to produce error
measurement results.
4.2 Usage and Maintenance of Electrode
The electrode must be calibrated with known standard buffer solution before operation,
and the pH of test solution should be closer to the pH buffer solution.
Remove the electrode cover, avoid the contact of electrode sensitive glass bulb with
hard objects, because any broken or abraded will make electrode invalid.
After measurement, put on protective cover timely. There should be a few reference
filling liquid in protective cover to keep the electrode bubble wet, must avoid immerse
in DI water.
The outer reference filling liquid of combination electrode is KCl solution for 3 mol/L.
Add fluid from the upper hole. When not in use, pull on the rubber case to prevent
liquid dry up.
Keep the electrode terminal clean and dry, absolutely prevent short circuit on both ends
of the output, otherwise will lead to misalignment or failure measurement.
To maintain good performance, match the electrode with pH meter of high input
impedance (
≥
1012 Ω) .
Avoid long-term immersion in DI water, protein solution, acid and fluoride solution.
Avoid contact with the organic silicone oil low.
After long-term usage, if found that the slope is slightly lower: immerse the bottom of
electrode in 4% HF (HF) in (3 ~ 5) s, rinse with DI water, and then immerse in
0.1mol/L hydrochloric acid solution soak to renew electrode.
If there are substances that can pollute sensitive bulb or block liquid junction in test
solution, the electrode will be passivation and the slope is reduced, the display
reading no phenomenon. Users should use appropriate cleaning solution to renew
electrode according to the nature of pollutants,
