4.3 Key controls
Key
ON/OFF
READ/BACKLIGHT
CAL
MODE or EXIT
Measurement modes
A single channel has to be selected first in order to switch the measurement mode (only SG98).
Press and hold the MODE key to switch between the dual and single channel measurement screen (only
SG98).
Press and release the MODE key in the single channel display to change between the different
measurement modes.
The sequence of the alternating measurement modes for pH/ion measurement (only SG98) is:
1. pH
2. mV
3. rel. mV
4. ion
For the DO measurement the sequence is:
1. saturation (%)
12
Operating the pH/ORP/Ion/DO meter SG98 and DO meter SG9
Press and release
Switch meter on or off
Start or endpoint measurement
(measurement screen)
Confirm input or start editing a table
Exit setting and go back to measurement
screen
Start calibration
Switch mode in single channel
(measurement screen)
Discard setting and go back to previous
menu (setting screens)
Press and hold for 3 seconds
Switch meter on or off
Turn backlight on or off
Review the last calibration data
Switch between single and dual channel
display (measurement screen) (only
SG98)
SevenGo (Duo) pro™/OptiOx™