all calibration data is deleted and the meter restores to the theory value. Some functions restore to
the original value (refer to appendix -1). When calibration or measurement fails, please restore the
meter to factory default setting and then perform re-calibration or measurement. Please note once
set the factory default, all the data deleted will be irretrievable.
7.7 Maintenance of the Conductivity Electrode
7.7.1 Always keep the conductivity electrode clean. Before taking a measurement, rinse the
electrode in distilled water. It is recommended to rinse it again in the sample solution. When
submerge the electrode in solution, stir the solution briefly to eliminate air bubbles and allow it to
make the measurement fast and stable.
7.7.2 At the top of the electrode there is a water sponge (see figure-13), when
water sponge is dry up, please refill with distilled water to keep it wet (not too
much). Keep in wet condition helps the electrode’s fast response time.
Electrode may react slowly if kept dry for a long period. Submerge it in
12.88Ms buffer solution for 5 to 10 minutes or in tap water for 1 to 2 hours
to renew it. Use distilled water to clean electrode after use.
7.7.3 The sensing rod of Model 2301T-F conductivity electrode is coated with platinum black to
minimize electrode polarization and expand measuring range. The platinum black coating adopted
our special processing technology, which improves the electrode performance and the firmness of
the coating. If the platinum black electrode is stained, gently clean the electrode with soft brush in
warm water containing detergent or alcohol.
8 PARAMETER SETTING
8.1 Main Menu
In the measurement mode, press key to enter in P1.0, then press or to switch
main menu: P1.0→P2.0→P5.0. Please refer to Figure - 14.
P1.0: pH parameter setting menu,
P2.0: Conductivity parameter setting menu,
P5.0: Basic parameter setting menu.
8.2 Sub-Menu
7.2.1 In P1.0, press to enter the submenu P1.1 for pH setting, press and to
change submenu: P1.1→P1.2→ … →P1.4. See 7.3 for details.
7.2.2 In P2.0, press to enter the submenu P2.1 for conductivity setting, press and
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