Sample Measurement; Oxygen Concentration In Mg/L Or Ppm Range; Oxygen Saturation Measurement - Mettler Toledo SevenGo pro SG6 Instrucciones De Manejo

Performing a 2-Point calibration
- Perform the first point calibration as described under "1-Point calibration".
- Place the DO sensor in the zero oxygen standard (51300140) and press Cal. The meter endpoints ac-
cording to the pre-selected endpoint settings after the signal has stabilized or after pressing Read.
- End calibration by pressing the End softkey. After the reading has endpointed, the calibration results
appear in the display.
- To use the calibration data for later measurements, press Save.
- To discard the calibration data, press Cancel.
Note
- To ensure the most accurate dissolved oxygen readings, it is advisable to calibrat regularly.
- For the 1point-calibration, the sensor must be removed from the medium, gently cleaned and dried.
Water droplets on the membrane must be removed because they prevent the sensor from being cor-
rectly calibrated.
- Zero point calibrations are frequently a source of error. Due to the very low zero current of METTLER
TOLEDO sensors, zero point calibration is unnecessary even for measurement at low oxygen concentra-
tions.
4.5

Sample measurement

4.5.1 Oxygen concentration in mg/L or ppm range

Place the DO sensor in the sample and press Read to start the measurement: the decimal point blinks.
The display shows the oxygen concentration of the sample in mg/L. The automatic endpoint A is the meter's
default setting. When the sensor output has stabilized, the display automatically freezes, and
Select automatic, manual or timed end-pointing method in the menu under "2. Set meas." in "1. EP For-
mat".
To manually endpoint a measurement press Read, the display freezes and
If the timed endpointing method is selected, the display freezes automatically after the set time has elapsed
and appears.
Note
For stability criterion of automatic endpoint algorithm (A) see Section 4.6.

4.5.2 Oxygen saturation measurement

To perform an oxygen saturation measurement in %, follow the same procedure as for an oxygen concentra-
tion in mg/L or ppm measurement. Press Mode to switch between oxygen concentration in mg/L, ppm and
oxygen saturation measurement modes.
METTLER TOLEDO SevenGo pro™ dissolved oxygen
Calibration / Sample measurement
appears.
appears.
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