YSI ScienceLine -- pHT - G - Manual (Page 6)

6 T 814244 04/2014
Commissioning, measuring, calibration ScienceLine
Commissioning, measuring, calibration
Commissioning The electrodes are filled with reference electrolyte solution in the factory.
Prepare the combination electrode for measuring as follows:
• The closure of the refilling opening consists of a slide. Open the refilling
opening for the reference electrolyte solution.
The refilling opening must always be open during calibration and
measurement!
1 Refilling
2
opening
• Remove the watering cap from the electrode tip. Possible salt deposits in the
area of the watering cap do not affect the measuring characteristics and can
easily be removed with deionized water.
Note
Please keep the watering cap. It is required for the combination electrode to
be stored. Always keep the watering cap clean.
• Connect the combination electrode to the meter
• Calibrate the combination electrode according to the operating manual of the
meter. W hen doing so, observe the general rules on the following page.
Note (only Scinece pHT-G)
When the Science pHT-G combination electrode is delivered, the ground
sleeve is fixed with a shrinkable tubing. For commissioning, carefully remove
the shrinkable tubing with a sharp knife or scalpel.
To moisten the ground surfaces hold the combination electrode in a vertical
position with the refill opening open and carefully loosen the ground junction
by turning it slightly until reference electrolyte solution comes out of the
junction. Then put the ground sleeve on again while turning it slightly.
• Make sure the refilling opening for the reference electrolyte solution is open.
• Avoid the displacement of any solution (sample or buffer solution) from one
measurement to the next by taking the following measures:
- Shortly rinse the calibration and sample beakers with the solution the
beakers are to be filled with next.
- Between measurements, rinse the combination electrode with the solution
that follows. Alternatively, you can also rinse the combination electrode with
deionized water and then carefully dab it dry.