YOKOGAWA PH72-21-E-AA, User Manual

Page: 34 / 112

IM 12B03D02-01E
4-7
4. Calibration
d
Procedure
Example 3: Manual calibration
F0403.EPS
POWER
CAL
Prompting
F/ENT
F/ENT
Manual calibration is complete
(2-point calibration)
F/ENT
Std. sol.
Water
Wait until
reading
stabilizes.
Wipe off washing water
from sensor thoroughly
and then immerse sensor
in standard solution.
to enter
to confirm
to select
manual
calibration
(MAn)
Wash sensor with water
thoroughly (or wash in
water in beaker).
For 2-pont calibration, continue the procedure following the dotted line. When using a
sensor without a built-in temperature element (needle type or test tube size pH sensor),
enter the temperature of standard solution following the procedure described in Section
4.1, Example 2.