YOKOGAWA PR20, Руководство пользователя

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IM 12B6K3-E-E
10
2. Remove the two O-rings (not
used). These O-rings are sup-
plied with the electrode and NOT
used in the PR20 retractable fit-
ting.
3. Mount the separately delivered
O-ring on the connector plug.
Push the spacer and the O-ring
over the electrode. This is a plas-
tic tube + O-ring delivered with
the PR20.
3-4. Mounting the electrode
1. Push the cage onto the electrode
(see fig. 3-4.)
2. Press the assembly into the
probe.
3. Tighten it by turning clock-wise.
Note:
The cage fits firmly on the elec-
trode, caused by the O-rings ins-
ide the cage. The assembly of
electrode and cage can be tigh-
tened until it stops. No tools are
necessary.
IMPORTANT NOTICES
Before the electrode is inserted into
the process, the electrode needs to
be cleaned and calibrated. The cali-
bration procedure is normally
described in the instruction manual
of the pH transmitter. Before the
cage is pushed onto the electrode,
the stopper should be removed
(see Nr. 30 in the exploded view).
ATTENTION
Do not insert the fitting into the pro-
cess without the electrode moun-
ted! Prevent liquid to come into
contact with the connector plug.
Start with the assembly of the elec-
trode into the probe and follow the
instructions for the preparation of a
new electrode (see §3-3).
3-2. Accessories
Optional accessories are delivered
separately. When a ball-valve is
ordered as an option, this should
be mounted to the measuring posi-
tion first. When the ball-valve in
place, the process line is secure.
If the ball-valve has a tapered con-
nection, it needs to be locked with
the supplied glue. Next the adapter
at the other side of the ball-valve
needs to be mounted. This adapter
has 1
1/
4
" BSPP-male thread at one
side and matching connection for
the ball-valve at the other side.
Mount the adapter on the ball-valve
and lock it with the supplied glue.
3-3. Preparing the electrode
1. Romove the “wet” pocket.
Squeeze it to let in air
Remark:
The electrode used with the
retractable fitting if supplied
separately or as an option with
the fitting. The electrode is ready
for immediate use because it is
shipped in a 'wet' pocket.