Measurement; Salinity/Chloride Compensation; Automatic Temperature And Pressure Measurement; Oxygen Measurement Without Salinity Correction - Tintometer Lovibond SD 400 Oxi L Mode D'emploi

Performance of the single-point calibration:
1. CAL is selected with the arrow keys (RIGHT/LEFT) and confirmed with ENTER.
2. The single-point calibration selection appears in the display and is confirmed with ENTER.
3. The prompt to place the sensor in 100% water-saturated air (storage flask) is displayed.
Press ENTER to start the calibration.
4. The display shows that the calibration is in progress.
5. The display shows when the calibration has finished. In order to exit calibration mode,
press ENTER.
Comments:
1. Please follow Steps 1 to 5 for the single-point calibration.
2. If an error message is shown in the display, the process is ended with ENTER.
3. The calibration in air-saturated water and water-saturated air are performed identically.
4. The calibration process can be interrupted by pressing and holding the ENTER button for
2 seconds.
Resetting to factory settings
In order to reset the instrument to the factory settings, CAL is selected. Calibration settings
is selected with the arrow keys and confirmed with ENTER. Factory settings appears in the
dialogue and is then confirmed with ENTER.

9. Measurement

The transparent storage flask has to be removed before the measurement.

9.1 Salinity/chloride compensation

S : Factory setting; is selected when testing fresh water samples that contain practically
OFF
no ions.
S : If the salinity correction is activated (see 7.3), the conductivity (in ppt or mS/cm) of the water
ON
sample to be measured is entered and automatically compensated for in the measurement.
Chloride compensation: If chloride is present in the sample, the chloride concentration can
be entered as salt concentration:
Salt concentration (in ppt) = chloride concentration (in ppt) x 1.80655.
For example, a chloride content of 20 ppt equals a salt content of 36.13 ppt (20 x 1.80655).

9.2 Automatic temperature and pressure measurement

The instrument adapts the instrument's settings to the measured temperature and/or the
measured environmental pressure in order to factor in dynamic fluctuations in the environment.

9.3 Oxygen measurement without salinity correction

If S is shown in the display, the salt correction is deactivated. The displayed oxygen value
OFF
indicates the oxygen content of fresh water.

9.4 Oxygen measurement with salinity correction

If the oxygen content in water containing salt is determined, the salt concentration of the
sample is entered manually (in ppt or mS/cm) in order to correctly display the dissolved oxygen
value of the sample. The unit "ppt" is defined as parts per thousand in water, while "mS/
cm" reflects the conductivity of the water. If the salt content (in ppt or mS/cm) is known and
entered manually, the salt correction is carried out automatically by the instrument.
The salt content is entered as described under section 7.3.
28 SD_400 Oxi L_4a 01/2021