Optex SE-pH-D Instruction Manual page 17

Model
Calibration pH
mode
ORP
Press
1
The setting menu is displayed.
Select [Sensor Setting] using
2
, and press
Select [Calibration Mode] using
3
, and press
Select [Auto] or [Manual] using
4
, and press
Measurement item
Auto
Manual
None
.
.
.
.
Factory default
setting
Auto
–
17