Running A One-Point Ph/Ion Calibration; Running A Multi-Point Ph/Ion Calibration - Mettler Toledo SevenGo Duo pro SG68 Instrucciones De Manejo

b) Press
The softkeys change back to
c) Navigate to a cell and press Delete to remove a value.
d) To finish editing the table, navigate with the
e) Press READ to confirm the action and exit the menu.
4.8 Calibration
The SevenGo Duo pro™ pH/DO meter allows you to perform pH and ion calibrations for up to 5 points
and DO calibrations for up to 2 points.

4.8.1 Running a one-point pH/ion calibration

a) Press and hold MODE for 3 seconds to switch to single channel pH or ion measurement screen
when in dual channel measurement.
b) Place the electrode in a calibration buffer and press CAL.
Cal 1 appears on the display.
c) The meter endpoints according to the preselected endpoint mode after the signal has stabilized or af-
ter pressing READ.
The relevant buffer value is shown on the display.
d) Press End to accept the calibration and return to sample measurement.
The calibration result (offset and slope for pH) is shown on the display.
— or —
e) Press Save to keep the calibration.
f) Press EXIT to reject the calibration.
Notes
●
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
(-59.16 mV/pH) will be used.

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.
a) Run the calibration as described in "Running a one-point pH/ion or one-point conductivity cal i bra-
tion" (steps a - c).
b) Rinse the electrode with deionized water.
c) Place the electrode in the next calibration buffer.
d) Press CAL.
Cal 2 appears on the display. The meter endpoints according to the preselected endpoint mode
after the signal has stabilized or after pressing READ. The relevant buffer value is shown on the
dis play.
e) Repeat the steps b - d for all calibration buffers.
Press End to end the calibration procedure.
f)
Alternatively, the meter ends the calibration automatically when 5 calibrations are performed.
The offset value and slope are shown on the display.
g) Press Save to keep the calibration.
h) Press EXIT to reject the calibration.
pH/ORP/Ion/DO meter SG68
and to enter the value and press READ to confirm.
and
Operating the pH/ORP/Ion/DO meter SG68
.
and to highlight Save.
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