4
ZOC33
Section 2: Introduction
SECTION 2: INTRODUCTION
General Description
The ZOC33 is an electronic pressure scanner which can
accept up to 128 pneumatic inputs. Each ZOC33 module
incorporates 64 individual piezoresistive pressure sensors.
Each eight pressure sensors are manufactured in a housing
designed to facilitate field replacement. No special tools
are required to access the sensors. The ZOC33 electronic
pressure scanning module is specifically designed for use in
wind tunnels, flight tests or applications where space is at a
premium and pressures will not exceed 50 psi.
The ZOC33 is powered by ±15Vdc. The module is manu
-
factured in a 64 channel model, a 128 channel duplexed
model and a 64 channel valveless model. All models are
available in multiplexed versions only.
The ZOC33 pressure sensors are arranged in blocks of 8.
In all variations except the valveless model, each block of
eight sensors has its own individual calibration valve. This
valve had four modes of operations:
(1) Operate
(2) Calibrate
(3) Purge
(4) Isolate
The modes are selected by applying control pressures in
a predetermined and logical order. The ZOC33 calibration
valves utilizes valve logic where the valve defaults to the
purge mode when no control pressures are applied.
Beginning with serial number 144, all ZOC33 modules have
a 500 ohm platinum RTD installed. This RTD is used by a
DSM3000/3200/3400 module or RAD3200/4000 module
to determine the temperature of the ZOC33 module. This
feature will be added to any older ZOC33 module received
for repairs.
Beginning with serial number 390, all ZOC33 modules have
a TEDS ID chip installed and programmed to interface with
a RAD3200/4000 or DSM3400 pressure measuring system.
This feature will be added to all older ZOC33 modules
received for repair.
Beginning with serial number 399, the ZOC33 valves were
redesigned. This results in a small change to the module
dimensions. This change only applies to valved models. A
ZOC33 valved model that requires repairs to the valves will
have to be upgraded to the newest configuration.
Summary of Contents for ZOC 33/64Px
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Page 11: ...7 ZOC33 Section 2 Introduction Figure 2 3 Current ZOC33 64PxX2 Dimensions inches mm...
Page 15: ...11 ZOC33 Section 3 Installation Operation Figure 3 2 ZOC33 Analog Interface...
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Page 24: ...20 ZOC33 Section 4 Electronic Components Figure 4 5 ZOC33 Decoder Board Connector Pinouts...
Page 25: ...21 ZOC33 Section 4 Electronic Components Figure 4 6 ZOC33 Decoder Board Layout...
