ETATRON D.S. eSelect M 1 pH (Rx) Скачать руководство пользователя страница 55

Страница: 55 / 60

ENGLISH

Modbus Address: from 0 to 254
Modbus Baudrate: transmission speed
TCP Address: IP address

The above menus are ONLY displayed if the instrument of the eSelect M series is connected to the external RS485 / ETHERNET module
(for the settings, refer to the CONNECTION manual).

Adjusts display backlighting obtaining energy savings;

To select the language of the programming menu.
After selecting the Language, the programming menu adapts accordingly.

DATA RESET: resets default factory settings. ONLY to be used when the parameters do not match or there are
programming issues or when the operator wishes to restart from scratch. NOT to be overused as many resets
may undermine the instrument’s efficiency.

◄

►

◄

►

By confirming YES, the display goes out for about 1 second, then goes back to the M E A S U R E M E N T D I S P L A Y

NOTES ON ELECTRODES, CLEANING AND MAINTENANCE

The formation of deposits on the electrode produces reading errors. The required cleaning operation depends on the type of deposit in question.
In case of thin deposits, shake the electrode or spray it with distilled water. Organic residues or especially stubborn deposits must be removed by
means of chemicals. Mechanical cleaning of the bulb should only be performed in extreme cases, but take into account that abrasion may cause
irreparable damage. If cleaning does not completely restore effectiveness of the electrode, the electrode might have got old. Ageing will show in
a measurement error or in a slow response. Check the mV value displayed at the bottom of the screen during Calibration operations: this is a
way to check electrode effectiveness, if the value deviates from the values indicated in the electrode specifications (contained in its instructions),
change the electrode or contact ETATRON or the authorised dealer.

RECONDITIONING VALID FOR BOTH PH AND RX ELECTRODES

The following chemical treatments may be performed to recondition the electrode until bulb cleaning.

Immerse the electrode tip in hydrochloric acid 0.1N (HCl) for 15 seconds, then rinse with water and dip the electrode again in a 0.1 N sodium
hydroxide solution (NaOH) for 15 seconds, followed by a second rinse. Repeat this sequence three times, then perform another test
measurement. If the reading is still incorrect, go to point 2.

Immerse the electrode tip in a 20% ammonium bifluoride solution (NH2F-HF) for two or three minutes, then rinse with water and perform
another measurement test. If the reading is still incorrect, proceed to point 3.

Immerse the tip of the electrode in 5% hydrofluoric acid (HF) for 10 seconds, then rinse thoroughly in water and very quickly in 5N hydrochloric
acid (HCl), followed by a second rinse in water. If the measurement reading should still be wrong, all is left to do is replace the electrode.

We suggest using new buffer solutions or still in good conditions (not old) or a reliable test kit.
As for the lengths of the pH electrode cable we advise max 9 m: contact ETATRON for longer distances.

SETTINGS

Modbus Address



EXPERT MENU



SETTINGS

Modbus Baudrate

38400



EXPERT MENU



SETTINGS