2. Barometric Compensation
A barometric compensation is required in the oxygen concentration measurement and calibration.
●
Auto: the meter can automatically determine the current pressure by means of an integrated pressure
sen sor.
●
Manual: the user can enter the absolute ambient atmospheric pressure.
3. Barometric Unit
There are four barometric units available for barometric reading:
mbar
Every unit can be calculated from the standard unit Pa using the following formulas: mbar = hPa = 100
Pa Torr = 133.322 Pa atm = 101325 Pa
6.6.1 DO calibration reminder
For details on the DO calibration reminder, see "pH/ion calibration settings".
6.7 Endpoint formats
Auto
With the automatic endpoint the selected stability criterion determines the end of an individual reading
depend ing on the behavior of the sensor used. This ensures an easy, quick and precise measurement.
a) Place sensor in the sample.
b) Press READ.
A appears on the display.
The measurement ends automatically when the measured value is stable.
If READ is pressed before the signal is stable, the endpoint format changes to manual .
Manual
Unlike Auto, user interaction is required to stop the measurement reading in manual mode.
a) Place sensor in the sample.
b) Press READ.
M appears on the display.
c) Press READ to end the measurement.
Timed
The measurement stops after the set time, which can be set between 5 s and 3600 s.
a) Place sensor in the sample.
b) Press READ.
T appears on the display.
The measurement ends automatically when the set time period expires.
If READ is pressed before the signal is stable, the endpoint format changes to manual .
Information on the display
The following symbols appear in the display, depending on the endpoint setting.
pH/ORP/Ion/DO meter SG68
hPa
appears on the display to signalize measurement stability.
appears on the display to signalize measurement stability.
Torr
appears.
Menus and settings
atm
appears.
appears.
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