VIO 7 Vio - TDS Parameter; Instrument Settings

31
Rev. 1 20.12.2019
EN
TDS Parameter
COND 7 Vio, PC 7 Vio
 The Conductivity measurement can be converted into the TDS Parameter
 This parameter uses the Conductivity calibration; therefore, refer to the previous paragraph to calibrate
the sensor
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 measurement mode press to access the SETUP menu.
 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
 When the value flashes, use the directional keys as indicated by the icon to enter the correct value
and confirm with .
By default, the TDS factor set is 0.71; the user can change it between 0.40 ... 1.00.
Below are the TDS factors in relation to the Conductivity value:
Conductivity of the Solution
TDS Factor
1-100 µS/cm
0.60
100 – 1000 µS/cm
0.71
1 – 10 mS/cm
0.81
10 – 200 mS/cm
0.94
The TDS measurement is expressed in mg/l or g/l depending on the value.
Instrument’s Settings
 In measurement mode to access the SETUP menu.
 Use the directional keys to move to SETTINGS P9.0 and access the menu by pressing the key .
 Move with the keys and select the program you want to access.