YOKOGAWA PR20, Руководство пользователя

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IM 12B6K3-E-E
16
Fig. 4-3. Replacing the O-rings
1
2
3
click
12 3 4
180º
pin
slot
During calibration the temperature
compensation should be active. It is
advised to, calibrate with buffer
solutions at a temperature near the
process temperature.
After calibration the probe with
electrode is replaced following the
procedure in §3-5.
4-4. Replacing the electrode
Start with removing the probe by
following the procedure described
in §4-2.
1 Turn the cage anti-clockwise
2 Pull out the assembly.
3 Take off the cage, spacer
and O-ring.
Now the electrode can be exchan-
ged for a new one. See §3-3 for
preparation of the new electrode.
4-5. Replacing the O-rings
The drawing (see fig. 4-3) shows
the position of the sealing O-rings
on the outside and the inside of the
cage. Exchange them when rene-
wing the electrode.
The O-rings are available as spare
parts. Refer to the exploded view
for the numbers.
The protection cage can be split
into two parts. The threaded part
[24] contains five O-rings. Three
O-rings on the outside [26 and 27]
27
26
28