User Manual

15
Pneumatically driven brush cleaning
(Model FC20-VP)
PARTS AND ACCESSORIES
ORDER NR. DESCRIPTION
K1520NA Tubing (ø4 mm)
K1520NG Brush holder
K1520NB Brush
K1520NG Protection hose
K1520NH Piston
K1520NJ Control unit
Figure 4-6 Example FC20-VP
4-5-4. Chemical cleaning HCN.
The chemical cleaning system is effective in
processes where deposits can be removed
by a suitable solvent. Good cleaning effects
can be obtained from periodically spraying of
an electrode. EXA has a built-in wash timer
with programmable washtime, interval time
and relaxation time for automatic cleaning
of the electrodes, preventing pollution of
the pH sensitive parts. After washing, it is
possible to check the response time of the
electrodes. A built-in (no return) nozzle in
the spray unit prevents penetration of the
process liquid in the cleaning system. The
standardised dimensions allow mounting in
all flow-, insertion- and immersion fittings of
Yokogawa as well as back-end mounting
on the 4-in-one pH/Redox electrodes, like
FU20.
Features
• The EXA analyzer has a built-in timer and
HOLD circuit.
• Built-in (no return) nozzle to prevent
penetration of the process liquid into the
cleaning system.
Figure 4-7 Example HCN4
PISTON
CONTROL
UNIT
TUBING
K1520NA
O-RING (11x 3)
BRUSH HOLDER
PROTECTION
HOSE
K1520NC
12B6K1-27
PNEUMATICAL CLEANING
K1547PP
(spare tubing, EPDM)
O-rings
(11x3)
K1500BZ
IM 12B6K1-01E-E