Other Measurements Perform With Conductivity Cell; Tds - Giorgio Bormac 8+ Série Manuel D'utilisation

The Cond measurement can be displayed on two different screens:
• Digital
Cell C=1
• Connect the conductivity cell to the BNC for Cond of device (grey).
• If the user does not use a sensor with incorporated temperature probe or an external NTC 30KΩ probe,
it is advisable to manually update the temperature value (MTC).
• Remove the electrode from its protection cap, rinse with distilled water and gently dab with
absorbent paper taking care to not scratch the electrodes.
• Immerse the electrode in the sample, the measuring cell and any vent holes must be completely
submerged.
Keep slightly stirring, gently shaking the sensor to eliminate any air bubbles that would distort the
•
measurement.
• Take the measurement only when
it is possible to use "HOLD" function (P6.8) which allows to freeze the measurement as soon as it
achieves stability.
• The device uses six different measurement scales and two measurement units (μS/cm and mS/cm)
depending on the value, the transition is carried out automatically by the device.
• Once completed the measurement, wash the conductivity 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 should be rinsed with plentiful distilled water after each analysis; if it has been
used with water-insoluble samples previously clean it by immersing it in ethanol or acetone.
Never clean the sensor mechanically, this would damage the electrodes compromising
functionality. For short periods, store the cell in distilled water, while for long periods keep
it dry.

Other measurements perform with conductivity cell

The conductivity measurement can be converted in TDS, Salinity and Resistivity parameters.
In measurement mode press
•
• These parameters use conductivity calibration; pressing "
calibration of conductivity.

• TDS

Cond8+, Cond80+, PC8+DHS, PC80+DHS
Total Dissolved Solids (TDS) correspond to the total weight of solids (cations, anions and non-dissociated
substances) in one liter of water. Traditionally, the TDSs are determined by gravimetric method, but a simpler
and faster method is to measure conductivity and then convert it to TDS by multiplying by the TDS
conversion factor. Enter the P2.9 setup menu to modify the conductivity / TDS conversion factor.
Below are TDS factors in relation to the conductivity value.
The measurement of TDS is expressed in mg/L or g/L depending on the value.
UM Serie 880 EN rev.2 30.07.2020
• Simultaneous pH/Cond
Cell C=1
icon appears. To eliminate any errors due to user interpretation,
key to scroll the different parameters TDS -> Salinity -> Resistivity.
Solution Conductivity
1-100 µS/cm
100 – 1000 µS/cm
1 – 10 mS/cm
10 – 200 mS/cm
28
Available only for
PC8+DHS and PC80+DHS
CAL" key it will access directly to the
TDS Fcator
0.60
0.71
0.81
0.94
EN