Idiomas disponibles
Idiomas disponibles
2 Press
once.
W is highlighted.
3 Press READ to enter W.
4 Repositioning the highlighted bar to A, T, E and R, and press READ to enter each letter of sample ID in
sequence as described in steps a - c.
5 Reposition the highlighted bar to OK, and press READ to save the sample ID.
4.7.3 Editing values in a table
The meter has a feature, which allows the user to enter, edit or remove values in tables. (for example,
temperature and buffer values for a customized buffer group). This is accomplished by using the softkeys on
the display to navigate from cell to cell.
1 Press READ to start editing the cell in the table.
The softkeys on the display change.
2 Press
and
The softkeys change back to
3 Navigate to a cell and press Delete to remove a value.
4 To finish editing the table, navigate with the
5 Press READ to confirm the action and exit the menu.
4.8 Calibration
The SevenGo Duo pro™ pH/Conductivity meter allows you to perform pH calibrations with up to 5 points.
4.8.1 Running a one-point pH/ion or one-point conductivity calibration
1 Press and hold MODE for 3 seconds to switch to single channel pH or single channel conductivity
measurement screen when in dual channel measurement.
2 Place the electrode in a calibration buffer/standard and press CAL.
Cal 1 appears on the display for pH and ion; CAL appears on the display for conductivity.
3 The meter endpoints according to the preselected endpoint mode after the signal has stabilized or after
pressing READ.
The relevant buffer/standard value is shown on the display.
For the conductivity calibration, the result is shown directly on the display.
4 Press End to accept the calibration.
The calibration result (offset and slope for pH, cell constant for conductivity) is shown on the display.
5 Press Save to save the result.
— or —
6 Press MODE/EXIT to reject the calibration and return to sample measurement.
Note
With the one-point calibration only the offset is adjusted. If the sensor was previously calibrated with a
multipoint calibration the previously stored slope will remain. Otherwise the theoretical slope (-59.16mV/
pH) will be used.
The second point required for the conductivity calibration curve is permanently programmed in the meter
and is 0 S/m for a specific resistivity moving toward infinity. To ensure the most accurate conductivity
readings, verify the cell constant with a standard solution regularly and recalibrate if necessary.
4.8.2 Running a multi-point pH/ion calibration
pH and ion calibrations can be run with this meter for up to 5 points.
1 Run the calibration as described in "Running a one-point pH/ion or one-point conductivity calibration"
(steps 1 - 3).
2 Rinse the electrode with deionized water.
3 Place the electrode in the next calibration buffer.
4 Press CAL.
SevenGo Duo pro™
to enter the value and press READ to confirm.
and
.
and
to highlight Save.
Operating the pH/ORP/Ion/Conductivity meter SG78 13
