Scanivalve ZOC 33/64Px, Instruction And Service Manual

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15
ZOC33
Section 3: Installation & Operation
Sensor Installation
The sensors used in a ZOC33 module are piezoresistive.
They are a standard Scanivalve Corporation “S-sensor”.
They are mounted in chip carriers which are then installed
in 8-channel sensor packs. The sensor packs are field
replaceable with standard hand tools. Replacing a sensor
in the field is possible but not recommended without prior
training from Scanivalve. If a sensor must be replaced,
follow these instructions.
To replace a sensor, follow this procedure:
(1) Remove appropriate sensor pack assembly from the
ZOC33 (screws for each sensor pack are located at the base
of the module).
(2) If necessary, remove the valve from the sensor housing.
This should be done only if tubing restrictions do not allow
the sensor pack to be pulled.
(3) Remove the sensor screw access plate. DO NOT
REMOVE O-RINGS.
(4) Remove the PC board.
(5) Loosen the sensor hold down screw. DO NOT REMOVE
THE SCREW OR O-RING.
(6) Carefully remove the damaged sensor. Take care not to
damage the wire bonds.
CAUTION! ESD PROTECTION
REQUIRED. The proper use of
grounded work surfaces and
personal wrist straps are required
when coming into contact with
exposed circuits to prevent static
discharge from damaging sensi-
tive electronic components.
CAUTION! Failing to carefully
follow this procedure could per-
manently damage the modules.
Figure 3.8 - ZOC33 Sensor Pack Exploded View