Conductivity Electrode Maintenance; Relations Between Tds And Conductivity; Setup Menu; Main Menu - Dostmann pH 7+ Manual Del Usuario

EN

Conductivity electrode maintenance

Always keep the conductivity electrode clean. Before taking a measurement, rinse the electrode in pure water and then
rinse it in the sample solution. When submerge the electrode in solution, stir the solution briefly to eliminate air bubbles
and allow it to stay until a stable reading is reached. For conductivity electrode which keeps dry, soak the electrode in
pure water for 5-10 minutes. Rinse the electrode in pure water after measurement.
If the electrode coated with platinum black is invalid, immerse it in 10% nitric acid solution or 10% hydrochloric acid
solution for 2 minutes, then rinse the electrode in pure water. If the electrode still does not work, re-coat platinum black,
or replace with a new conductivity electrode.

Relations between TDS and conductivity

TDS and conductivity is linear related, the conversion factor is 0.40-1.00. Adjust per parameter P3.1. The factory
default setting is 0.71. The meter can only be calibrated in Conductivity mode and not TDS mode. After
calibration of conductivity, the meter can switch from conductivity to TDS.
Adjust TDS conversion factor per parameter P3.1 according to the data collected during testing
Common used TDS conversion factors
Conductivity of solution
0-100 μS/cm
100-1,000 μS/cm
1-10 mS/cm
10-100 mS/cm

Setup Menu

Main menu

In the measurement mode, press
P1.0→P2.0→P3.0→P6.0.
P1.0: pH parameter setting menu,
P2.0: Conductivity parameter setting menu,
P3.0: TDS parameter setting
P6.0: Basic parameter setting menu.

Submenu

In P1.0 mode, press
switch among submenu: P1.1→P1.4→P1.5→P1.6→P1.7.
In P2.0 mode, press
keys to switch among submenu: P2.1→P2.2→P2.5→P2.6→P2.8→P2.9.
In P3.0 mode, press
In P6.0 mode, press
switch among submenu: P6.1→P6.6→P6.8.
key to enter in P1.0, then press
key to enter in submenu P1.1 of pH parameter setting, then press
key to enter in submenu P2.1 of conductivity parameter setting, then press
key to enter in submenu P3.1 to adjust TDS factor.
key to enter in submenu P6.1 of basic parameter setting, then press
TDS conversion factor
0.60
0.71
0.81
0.94
and
18
to slide the main menu:
and keys to
and
and keys to