Lutron Electronics WA-2017SD Operation Manual page 19

5) Use the two fingers to press the " REC Button " ( 3-4,
Fig 1 ) and " HOLD Button " ( 3-3, Fig. 1 ) at the
same time. Until Display will show the following screen
then release the both fingers.
PH
CAL
6) Press the "
( 3-6, Fig. 1 ) once in sequence to select the following
screen.
a
4.00
CAL
b
7.00
CAL
c
10.00
CAL
d
CLr
CAL
Button " ( 3-5, Fig. 1 ) or "
▲
For pH 4.00 calibration
For pH 7.00 calibration
For pH 10.00 calibration
Clear the existing calibration data
17
Button "
▼