10
5. Calibrating the Controller
5.1 The Lower Level Menus
The "CAL PH/CAL OrP" display is the first menu seen upon
entering the lower-level menus, depending on which mode is
set. Press
▲
or
▼
key to display the various menus as shown
in the figure below. Press
ENTER
key to go to the lower level
menus.
5.2 Calibrating for pH Measurement
5.2.1 The CAL PH menu
1. Enter this menu by pressing the
MODE
key twice to the
“SEt”
display if you are in measurement mode.
2. Press
ENTER
key. If the password has been set earlier,
key in the password using the method described in section
4.1. Press
ENTER
once to confirm. After you set the
correct password, you can see the “
CAL
” and “
PH
”
displays, blink alternately.
3. Press
ENTER
key to enter into the pH calibration mode.
Dip both the pH electrode and temperature probe in the
standard solution for a few minutes.
4. When
“
CAL PH
” displays, press
ENTER
key. The current
measured value (7
±
0.3 pH) will be displayed. Once the
reading stablizes, press
ENTER
to confirm.
5. Use
▼
keys to scroll to the other buffer values “
PH4
” and
“
PH10
”, in that sequence. Press
ENTER
to confirm and
START
CAL pH /
CAL OrP
CAL
o
C
Hi
SEt
Hi
Hys
Lo
SEt
Lo Hys
SEt
id
