Carl Roth COND 50 VioLab, Instruction Manual

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19
UM Serie 50VioLab EN rev.1 19.05.2020
EN
Example of an unstable measurement Example of stable measurement

After the measurement, wash the electrode with distilled water and preserve it in the appropriate
storage solution.

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 indicates that the connection was successful.

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.

The DHS electrode calibrated with a pH 7 Vio or PC 7 Vio device is ready to be used on any pH meter
enabled for DHS recognition and vice versa.

When the electrode is disconnected, a message on the display informs the user of the
deactivation of the sensor; the instrument regains its previous calibration and no data is lost!

The DHS electrode does not require batteries and if it is used on pH meters that are not
enabled to recognize the chip, it works as a normal “analog” electrode.

Errors during calibration

NOT STABLE: The button was pressed with still unstable signal. Wait for the icon to appear
to confirm the point.

WRONG BUFFER: The buffer is polluted or not part of the recognized families.

SLOPE OUT OF RANGE: The slope of the sensor calibration line is out of the acceptable range 80 - 120%.

CALIBRATION TOO LONG: the calibration exceeded the time limit: only the points calibrated up to that
moment will be kept.