Performing Conductivity Measurement; Other Measurements Carried Out With The Conductivity Cell; Tds Parameter - XS Instruments pH 60 VioLab Manuel D'utilisation

 Performing Conductivity measurement
 Access the Setup menu for Conductivity to check the calibration, and if necessary, update the reading
parameters; press key
Press to scroll through the different screens of parameters until activating the Conductivity

parameter indicated by the icon
Connect the Conductivity cell to the BNC for Cond of the instrument (grey).

 If the user does not use a cell with a built-in temperature probe or an external probe NTC 30KΩ, it is
recommended to manually update the temperature value (MTC).
Remove the cell from its test tube, rinse with distilled water, dab gently taking care not to scratch the

electrodes.
Dip the sensor in the sample: the measuring cell and any relief holes must be completely immersed.

 Keep slightly stirred and eliminate any air bubbles that would distort the measurement by gently
shaking the sensor.
Scroll on the display with four red bands

 Consider the measurement truthful only when the stability icon appears
For a highly accurate measurement the instrument uses five different measurement scales and two

units of measurement (µS / cm and mS / cm) depending on the value; the scale change is performed
automatically by the device.
 Once the measurement is finished, wash the cell with distilled water.
 The Conductivity sensor does not require much maintenance; the main aspect is to make sure that the
cell is clean. The sensor must be rinsed with abundant distilled water after each analysis; if it has been
used with water insoluble samples, before carrying out this operation, clean it by immersing it in
ethanol or acetone.
Never clean it mechanically, this would damage the electrodes compromising the functionality.
For short periods, store the cell in distilled water, while for long periods, keep it dry.

Other measurements carried out with the Conductivity cell

The conductivity measurement can be converted into the TDS and Salinity parameters.
In measure mode, press the key

 These parameters use the Conductivity calibration; therefore, refer to the previous paragraph to
calibrate the sensor.
 TDS Parameter
COND 60 VioLab, PC 60 VioLab
Total Dissolved Solids (TDS) correspond to the total weight of the solids (cations, anions and non-dissociated
substances) in a liter of water. Traditionally, TDS are determined using the gravimetric method, but a simpler
and faster method is to measure Conductivity and convert it to TDS by multiplying it by the TDS conversion
factor.
 In measure mode press
 Use the directional keys to move to TDS SETTINGS P4.0 and access the menu by pressing the key
.
Press again to enter the program TDS FACTOR P4.1.

UM Serie 60VioLab rev.0 20.05.2020
to return to measure mode.
.
means that the measurement is not stable yet.
to scroll through the various parameters TDS -> Salinity.
to access the SETUP menu.
28
.
EN