Milkotester Master Pro Operating Instructions Manual page 37

Dip the electrode into the high value buffer solution and make sure
that the junction zone of the electrode is at least at 30 mm below the
surface of the buffer solution and leave it at rest. Now you have to enter
the known value of the "high" buffer solution. Use ↑↓ (Up and Down)
arrows to enter the new value and Press ENTER to confirm. After dialing
the last symbol press ENTER to confirm the new value.
The following text will appear on the display:
Wait until the electrode and the buffer stabilize /the reference value
should change the least possible/. Press ENTER to set the value
Please note:
The pH electrode must be calibrated on a regular base in order to
obtain high accuracy results of the measurement.
For calibration use buffer solutions with values as close as possible
to the pH values of the milk samples.
After each measurement of pH rinse the tip of the electrode with
de- ionized water.
After each measurement or calibration put on the protective cup of the
electrode.
The pH electrode is fragile and must be handled with care.
MENU > Settings > Set pH > pH mode
The milk analyzer has two service menus of work – manual and automatic.
They are selected from MENU > Settings > set pH > pH service menu
Choose pH service menu and press ENTER.
Setting
Ref. Value: xxxxx
pH calibration
pH mode
37
Ultrasonic milk analyzers
Operating Instructions Master Pro
Milkotester Ltd