YOKOGAWA PH8EHP User Manual page 18

(3) Supply a KCl solution to the sensor.
For the 250-mL KCl reserve tank, mount the reserve tank on the mounting hardware with the
tube connection part facing down. Using a pin supplied with the tank, make several holes in the
upper part of the sides of the tank (see Figure 2.6).
Stand the sensor upside down at a lower position than the reserve tank as shown in Figure 2.6
so that KCl solution flows from the tank into the sensor. When the KCl solution fills the sensor
and overflows from the liquid junction mounting hole, securely screw the liquid junction into the
mounting hole.
CAUTION
How to screw
liquid junction
B
Leave air space in the tank.
(Make several holes using the
pin supplied with the tank)
Liquid Junction (Loose)
Sensor Body
Figure 2.6 Supplying KCl Solution to Sensor Body
For the 500-mL KCl reserve tank, supply a KCl solution to the reserve tank and close the cover.
Be sure to hold the reserve tank by hand when opening or closing the cover. Also, when further
tightening the fixing nut at the bottom of the reserve tank, be careful not to tighten it too tight.
Excessive tightening may cause cracks in the reserve tank.
Cover
Reserve
Tank
Fixing Nut
KCl Solution
Refilling Tube
Figure 2.7 500-mL Reserve Tank
When you screw the liquid junction into the mounting hole, grip and rotate the "A" (brown body).
A
If you grip and rotate the "B" (black body), the liquid junction may be broken.
General Purpose
Reserve Tank
KCl Solution Tube
To pH Sensor
F2.6.ai
< 2. Installation >
F2.7.ai
IM 12B7J2-01E
2-5
11th Edition : Nov.20,2018-00