Performing Ph Measurement; Sensors With Dhs Technology - Dostmann VIO 7 Serie Manual De Instrucciones

• Performing pH measurement

• In measure mode, press the key
Connect the electrode to the pH / ORP BNC of the instrument (green).
•
• If the user does not use an electrode with a built-in temperature probe or an external probe NTC
30KΩ, it is recommended to manually update the temperature value (MTC).
• Remove the electrode from its tube, rinse with distilled water and dab gently with paper towel.
• Check the presence and eliminate any air bubbles in the membrane bulb by stirring vertically (as for
the clinical thermometer). If present, open the side cap.
• Dip the electrode in the sample, while keeping it slightly stirred.
• The scrolling on the display of four red bands
Consider the measurement truthful only when the stability icon appears
•
Example of an unstable measurement
After the measurement, wash the electrode with distilled water and preserve it in the
•
appropriate storage solution (STORAGE).
Never store the sensors in ANY TYPE of water OR DRY!
• It is a useful tool for obtaining accurate measurements always having on the display the indication of
the buffers used for calibration and the possibility of consulting the calibration data, at any time, or
entering the expiry date.

• Sensors with DHS technology

The electrodes equipped with DHS technology can save a calibration curve within their memory. The
calibrated sensor is automatically recognized by any instrument enabled for DHS recognition and
acquires its calibration.
Connect the DHS electrode to the BNC and RCA connectors of the instrument.
•
• The device automatically recognizes the chip; the following screens scroll on the display:
• First screen: sensor identification name and production batch.
• second screen: CALIBRATION DATE and TIME (if a GLP instrument is used) and beakers indicating
the buffers used;
• third screen: OFFSET value of the electrode expressed in mV;
• fourth and possibly fifth screen: Slope% in the measuring range (one Slope% only if two
calibration points are performed, two Slope% if three points are performed).
When the DHS electrode is recognized, the active calibration on the instrument becomes the one of
•
the sensor.
• The icon on the display
• If the calibration is satisfactory (see the calibration data in menu P.1.6), the electrode is ready to start
the measurements. Otherwise, recalibrate the electrode; the data will be updated automatically.
Series 7 Vio ENG Version 2.0 April 2020
and move to the pH parameter indicated by the icon
means that the measurement is not stable yet.
indicates that the connection was successful.
21
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Example of stable measurement
EN
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