Yokogawa PH72 Personal pH/ORP Meter - Manual (Page 32)

IM 12B03D02-01E
4-5
4. Calibration
Example 2: Calibration of a sensor without a built-in temperature element* using a pH
7 standard solution
* Needle type or test tube size pH sensor
F0402.EPS
POWER
CAL
Input of standard solution
temperature
25.0 ؇ C fixed
Temperature set on 'M.tP' panel
F/ENT
F/ENT
Auto calibration in progress Auto calibration is complete
Standard
solution
temperature
to enter
standard
solution
temperature
Std. sol.
Water
Wait until
reading
stabilizes.
Wipe off washing water
from sensor thoroughly
and then immerse sensor
in standard solution.
to select auto calibration (AUto)
After
a few
seconds
Thermometer
Wash sensor with water
thoroughly (or wash in
water in beaker).
For 2-point calibration, continue the procedure in the same way as Example 1. The
difference between Example 1 and 2 is that
appears on the display and the
temperature of a standard solution should be entered manually.