Scanivalve ZOC 33/64Px Troubleshooting guide







iv
ZOC33
Section 1: Introduction
iv
ZOC33
Preface
PREFACE

The WARNING! symbol indicates that danger of injury for persons and the environment and/or
considerable damage (mortal danger, danger of injury) will occur if the respecve safety precau-
ons are not taken.
The CAUTION ! symbol indicate danger for the system and material if the respecve safety precau-
ons are not taken.
The ESD note symbol indicates that proper precauons for handling Electrostac Sensive Devices
needs to be taken when performing the related operaon. This includes the use of grounded work
surfaces and personal wrist straps to prevent damage to sensive electronic components.

Scanivalve Corporaon, Liberty Lake, Washing-
ton, hereaer referred to as Seller, warrants to the Buyer
and the rst end user that its products will be free from
defects in workmanship and materi al for a period of twelve
(12) months from date of delivery. Wrien noce of any
claimed defect must be received by Seller within thirty
(30) days aer such defect is rst discovered. The claimed
defecve product must be returned by prepaid transporta-
on to Seller within ninety (90) days aer the defect is rst
discovered. Seller’s obligaons under this Warranty are
limited to repairing or replacing, at its opon, any product
or component part thereof that is proven to be other than
as herein warranted.
Surface transportaon charges covering any
repaired or replacement product or component part shall
be at Seller’s expense; however, inspecon, tesng and
return transportaon charges covering any product or com-
ponent part returned and redelivered, which proves
not to be defecve, shall be at the expense of Buyer or the
end user, whichever has returned such product or compo-
nent part.
This Warranty does not extend to any Seller product
or component part thereof which has been subjected to
misuse, accident or improper installaon, maintenance or
applicaon; or to any product or component part thereof
which has been repaired or altered outside of Seller’s facili-
es unless authorized in wri ng by Seller, or unless such
installaon, repair or alteraon is performed by Seller; or
to any labor charges whatsoever, whether for removal and/
or reinstallaon of the defecve pro duct or component
part or otherwise, except for Seller’s labor charges for
repair or replacement in accordance with the Warran ty.
Any repaired or replacement product or component part
thereof provided by Seller under this Warranty shall, upon
redelivery to Buyer, be warranted for the unexpired poron
of the original product warranty.
THIS WARRANTY IS IN LIEU OF AND EXCLUDES ALL
OTHER WARRANTIES, EXPRESS OR IMPLIED, ARISING BY

v
ZOC33 Section 1: Introduction
v
ZOC33 Preface
OPERATION OF LAW OR OTHERWISE, INCLUDING THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE, AND IN NO EVENT SHALL
SELLER BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL
DAMAGES.
In the event of a failure:
1) Nofy Scanivalve Corporaon, Customer Service
De partment. Include model number and serial number.
On receipt of this informaon, service data or shipping
instrucons will be forwarded. This may be transacted by
telephone or e-mail.
2) On receipt of shipping instrucons, forward the
pro duct, transportaon prepaid. Repairs will be made and
the product returned.
3) All shipments should be made via “Best Way”.
The product should be shipped in the original packing con-
tainer or wrapped in protecve material and surrounded by
a minimum of four (4) inches of a shock absorbing material.

Scanivalve is a registered trademark of Scanivalve Corpora-
on.
All other brand and product names are trademarks or regis-
tered trademarks of their respecve companies.

If the product must be shipped, whether being returned
to Scanivalve or relocated to another locaon it must be
packaged properly to minimize the risk of damage. The
recommended method of packing is to place the instru-
ment in a container, surrounded on all sides with at lease
four inches of shock aenuang material such as Styrofoam
peanuts.

Please note that the product specicaons and other
informaon contained in this manual are subject to change
without noce. Scanivalve Corporaon makes an eort and
strives to provide complete and current informaon for the
proper use of the equipment. If there are any quesons
regarding this manual or the proper use of the equipment,
contact Scanivalve Corporaon.

If there are any quesons or concerns regarding any Sca-
nivalve product please do not hesitate to contact us at the
following:
Scanivalve Corp.
1722 N. Madson Street
Liberty Lake, WA 99019
Telephone: [phone] [phone]
Fax: [phone]
[e-mail]
www.scanivalve.com
Scanivalve Corporaon is an ISO9001:2000 cered com-
pany.

[INTENTIONALLY LEFT BLANK]

1
ZOC33 Table of Contents

 
Warnings, Cauons and Notes iv
Warranty iv
Trademarks ® and Copyrights © v
Packaging for Shipment v
Important Noce v
Contact Informaon v
 
General Specicaons 2
Environment Specicaons 2
 
General Descripon 4
ZOC33/64Px 5
ZOC33/64PxX2 6
ZOC33/64Px - Valveless 8
Thermal Control Unit (ZOCTCU) 9
 
Unpacking 10
Overview 10
Electrical Inputs & Outputs 10
Pneumac Inputs 12
Calibraon Valve Operaon 13
ZOC33 ZOCTCU Connectors 14
Sensor Installaon 15
 
Amplier Board 17
Mulplexer Board 18
Decoder Board 19

2
ZOC33
Section 1: Specifications


Size (WxHxD) 1.43” x 1.69” x 4.98”
(36.42cm x 42.8cm x 126.37cm)
Weight
ZOC33/64Px 11 oz (312g)
ZOC33/64PxX2 13 oz (369g)
ZOC33TCU 4.0 lbs (1.8kg)
(including ZOC33 module)
Full Scale Ranges ±10 inH2O, ±20 inH2O,
1psid, 2.5psid, 5psid,
15psid and 50psid
(2.5kPa, 5kPa, 7kPa,
17kPa, 35kPa, 100kPa,
and 350kPa)
Accuracy (aer calibraon)
10 inH2O ±0.15% FS
20 inH2O ±0.12% FS
1psid ±0.10% FS
2.5psid ±0.10% FS
5psid ±0.08% FS
15psid ±0.08% FS
50psid ±0.08% FS
Overpressure (No damage)
10 inH2O 5psi
20 inH2O 5psi
1psid 5psi
2.5psid 200%
5psid 200%
15psid 200%
50psid 200%
Temperature Sensivity
Range Zero Span
10 inH2O 0.25% 0.10%
20 inH2O 0.25% 0.08%
1psid 0.10% 0.05%
2.5psid 0.10% 0.05%
5psid 0.10% 0.05%
15psid 0.10% 0.05%
50psid 0.10% 0.05%
Max Reference Pressure 50 psig (350kPa)
Scan Rate 40kHz (standalone)
Resoluon innite
Inputs (Px) 64 or 128 (PxX2)
Pneumac Connectors
ZOC Px .042” tubulaons
ZOC Control Pressures 0.063” tubulaons
ZOCTCU 1-2 73 port connectors
(73ZOCM-063)
Electrical Connectors
ZOC Module 15 pin MDM 15SL2P
ZOCTCU MS3100A Type, Size 20
Power Requirements
ZOC33 Module +15Vdc @ 120mA
-15Vdc @ 30mA
ZOCTCU +24VDC @ 1.0A
Full Scale Output
Standard ±2.5Vdc
Oponal ±5.0Vdc
Sensor Excitaon +5Vdc Constant Voltage
(Internally Supplied)

Operang Temperature 0 to 60 °C
Humidity
Operaon 5 to 95% RH, Non-Condensing
Storage 5 to 95% RH, Non-Condensing
Shock & Vibraon MIL-STD-810D Curve H
Shock 10G
Vibraon 10G
Acceleraon 10G
Media Gasses compable with
Silicon, Silicone,
Aluminum and Buna-N

3
ZOC33 Section 1: Introduction
Section 1: Specifications


4
ZOC33
Section 2: Introduction


The ZOC33 is an electronic pressure scanner which can
accept up to 128 pneumac inputs. Each ZOC33 module
incorporates 64 individual piezoresisve pressure sensors.
Each eight pressure sensors are manufactured in a housing
designed to facilitate eld replacement. No special tools
are required to access the sensors. The ZOC33 electronic
pressure scanning module is specically designed for use in
wind tunnels, ight tests or applicaons 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 mulplexed versions only.
The ZOC33 pressure sensors are arranged in blocks of 8.
In all variaons except the valveless model, each block of
eight sensors has its own individual calibraon valve. This
valve had four modes of operaons:
(1) Operate
(2) Calibrate
(3) Purge
(4) Isolate
The modes are selected by applying control pressures in
a predetermined and logical order. The ZOC33 calibraon
valves ulizes 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 planum 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 conguraon.

5
ZOC33 Section 2: Introduction

This module contains sixty four (64) pressure sensors in
eight sensor packs. Each sensor pack contains:
• eight sensors
• a calibraon valve
• an excitaon board
• a high speed mulplexer
The output of each sensor is directed to the mulplexer/
amplier. The channel to be output is selected by a CMOS
level binary address supplied by either a Scanivalve data
acquision system or by the customer’s data acquision
system.
Figure 2.1 depicts a ZOC33/64Px.


6
ZOC33
Section 2: Introduction

This module contains sixty four (64) pressure sensors in
eight sensor packs. Each sensor pack contains:
• eight sensors
• a calibraon valve
• a duplexing valve
• an excitaon board
• a high speed mulplexer
• 16 input tubes (Bank A and Bank B, 8 inputs each)
The sensors are arranged in eight groups of eight. Each
sensor has two pneumac inputs: Bank A and Bank B. The
inputs are switched pneumacally by enabling the duplex-
ing valve. Even though there are 128 pressure inputs only
one Bank of 64 pressure inputs can be measured at one
me. Each group of eight sensors may be a dierent range.
The standard output of the module is ±2.5Vdc correspond-
ing to the channel selected by a CMOS level 6 bit binary
address.
Figure 2.2 depicts a ZOC33/64PxX2, Serial number 398 and
earlier.
Figure 2.3 depicts a ZOC33/64PxX2, Serial number 399 and
later.


7
ZOC33 Section 2: Introduction


8
ZOC33
Section 2: Introduction

This module contains sixty four (64) pressure sensors in
eight sensor packs. Each sensor pack contains:
• eight sensors
• an excitaon board
• a high speed mulplexer
The output of each sensor is directed to the mulplexer/
amplier. The channel to be output is selected by a CMOS
level binary address supplied by either a Scanivalve data
acquision system or by the customer’s data acquision
system.
This version does not have a calibraon valve. All calibra-
ons are performed using the reference port. In wind
tunnel applicaons, a zero oset correcon is performed
“wind o.” The valveless design is also preferred for rotat-
ing applicaons as no control pressures are required.
Figure 2.4 depicts a ZOC33/64Px Valveless.


9
ZOC33 Section 2: Introduction

An oponal Thermal Control Unit (ZOCTCU) (Figure 2.5) is
available for applicaons where temperature swings my be
great enough to exceed the compensated range of the sen-
sors. Exceeding the compensated temperature range can
induce errors in the pressure measurements. See Secon
1,  for more informaon on the compensated
temperature range. The ZOCTCU consists of a housing,
insulaon and a proporonal heater which will maintain
the temperature for the module at 40°C ±0.3°C.


10
ZOC33
Section 3: Installation & Operation


All ZOC33 modules have been extensively tested prior to
shipment. All modules are packed to minimize the chances
of shipping damage. However, damage can sll occur. The
customer must inspect the modules and shipping materials
for obvious signs of damage. If it is suspected that damage
may have occurred, contact Scanivalve Corporaon imme-
diately.
Once you have unpacked the module, do an inventory
check of the shipment. Each shipment should at least
include a mang connector and this manual.

ZOC33 modules are designed to funcon best when
used with one of Scanivalve Corporaon’s data acquisi-
on systems, either a DSM3000/3200/3400/4000 or
RAD3200/4000. All ZOC33 modules will funcon with older
data acquision systems such as HyScan 2000/1000 as well.
They can also be used as a standalone module with another
high speed data acquision system.

The Electrical Input and Output wiring is compable with
all other ZOC cable serviced modules. The ZOC33 may
be installed into any exisng Scanivalve systems without
changing conguraons. If the ZOC33 is to be used in a
custom data system, refer to Figure 3.2.
The user is cauoned to follow safe instrument handling
pracces when handling the ZOC33 modules. This includes:
(1) Make and break all connecons to the
module with the power o.
(2) Recommended power input to the module is
±15Vdc.
Figure 3.2 shows the output connector pin assignments
for all of the ZOC33 variaons. This gure shows the RTD
connecons (+Tem and -Temp) and the TEDS ID chip output
(ID). These connecons may not be acve on all modules.
Refer to Secon 2,  for more informaon.

CAUTION! Not following standard
safe instrumentaon handling
pracces could permanently
damage the modules.

11
ZOC33 Section 3: Installation & Operation


12
ZOC33
Section 3: Installation & Operation

Pneumac inputs consist of: Px Inputs(8 or 16), Control
Pressure Inputs ( PxA Ctl, Cal Ctl), a Calibraon Input, and
a Reference Input. The duplex version also has a duplex
control pressure input (PxB). Valveless units do not have
Control Pressure and Calibraon Inputs
All Px inputs are .040 inch(1.067mm) bulged tubulaons.
These tubulaons are designed to accept any .042 inch
tubing manufactured by Scanivalve Corp. Each sensor pack
valve block contains eight (8) or, in the duplex version,
sixteen(16) Px inputs. ZOC33 modules are capable of mea-
suring pressures up to 50 psid.
Control pressure inputs consist of: PxA CTL and CAL CTL.
The duplex module has a third control pressure input, PxB
CTL. These inputs are used to switch the valve logic to each
of the four (4) states: Operate, Calibrate, Purge, and Isolate.
The control pressures must be 65 psi. Figure 3.3 shows the
64Px valve logic. Figure 3.4 shows the 64PxX2 Valve Logic.
Calibraon/Reference Inputs consist of a Calibraon input
and a Reference input. The Calibraon input is an .042 inch
O.D. tubulaon. It is normally connected to a source of
calibraon pressures. Internally, this input is manifolded
to all of the sensors through the calibraon valving. The
Reference input is an .063 inch (1.6mm)O.D. tubulaon. It
provides a point of reference for the transducers. All of the
sensors in each block of eight share a single reference.
Manifold blocks are provided with the module to facilitate
plumbing. This also permits easy removal of a sensor pack
in the event that eld repairs are required.
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13
ZOC33 Section 3: Installation & Operation

As discussed in Secon 2, Introducon, ZOC33/64Px and
ZOC33/64PxX2 modules are equipped with an internal
calibraon valve in each sensor pack. The calibraon valve
can take one of four states:
It is important that all control pressures should be dry,
ltered instrument air or nitrogen.
Operate Mode
This connects each Px input to its associated
pressure sensor. The ZOC33/64PxX2 module
allows the customer to select one of two banks
for input.
Calibrate Mode
This mode connects all the pressure sensors to
the calibraon input.
Purge Mode
This mode connects the Px inputs to the pressure
sensors and the calibraon input. A safe purge
pressure can be applied to purge input lines.
Isolate Mode
This mode isolates the pressure sensors from the
Px and calibraon lines.
Tables 3.1, 3.2 and 3.3 are state tables that describe pneu-
mac logic for each state of the valves.
Table 3.1 - ZOC33/64Px Valve
Logic
Mode Px CTL CAL CTL
Operate X 65psi
Calibrate 65psi X
Purge X X
Isolate 65psi 65psi
Table 3.2 - ZOC33/64PxX2 Valve Logic
Mode PxA CTL PxB CTL CAL CTL
Operate A X 65psi 65psi
Operate B 65psi X 65psi
Calibrate 65psi 65psi X
Purge X X X
Isolate 65psi 65psi 65psi
Table 3.3 - ZOC33/64Px Valveless
Valve Logic
Mode Px CTL CAL CTL
Operate X X
Calibrate N/A N/A
Purge N/A N/A
Isolate N/A N/A
NOTE: Valveless Modules do not have control pressure
inputs
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
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14
ZOC33
Section 3: Installation & Operation

Figure 3.7 shows the pneumac and electrical connectors
on a ZOC33 ZOCTCU. View B shows the electrical connec-
tor, View A shows the pneumac connector for inputs 1-64,
control pressures, the reference input and the calibraon
inputs. View C shows the pneumac inputs for channels
65-128. This connector is not installed on a non-duplexed
module. The drawing has been modied from the actual
conguraon for clarity.
Table 3.4 - ZOCTCU Pneumac Inputs
Channels Connector Tubes Notes
1-64 View A 1-64
PxA CTL View A PxA CTL
PxB CTL View A PxB CTL
PxB is not
connected
in a non-
duplexed
module
CAL CTL View A CAL CTL
CAL HI View A CAL HI
CAL LOW View A CAL LOW
REF HI View A REF HI
REF LOW View A REF LOW
1-64 View C 1-64
This con-
nector
is only
installed
for duplex
modules
Table 3.5 - ZOCTCU Electrical Inputs/Outputs
Pin Funcon Notes
A Address 0
BAddress 1
C Address 2
D Address 3
E Address 4
F +15Vdc
G-15Vdc
H+ Temp ZOC33 Internal RTD
J - Temp ZOC33 Internal RTD
K ±15Vdc Return
L + Output ±2.5Vdc Nominal
M- Output
P+ Temp
(Heater)
Heater Temperature - Pre
March 2000 only
R ID TEDS Chip informaon
SAddress 5
T- Temp
(Heater)
Heater Temperature - Pre
March 2000 only
U+28Vdc Heater Power
V +28Vdc Return
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15
ZOC33 Section 3: Installation & Operation

The sensors used in a ZOC33 module are piezoresisve.
They are a standard Scanivalve Corporaon “S-sensor”.
They are mounted in chip carriers which are then installed
in 8-channel sensor packs. The sensor packs are eld
replaceable with standard hand tools. Replacing a sensor
in the eld is possible but not recommended without prior
training from Scanivalve. If a sensor must be replaced,
follow these instrucons.
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 restricons 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 stac
discharge from damaging sensi-
ve electronic components.
CAUTION! Failing to carefully
follow this procedure could per-
manently damage the modules.


16
ZOC33
Section 4: Electronic Components
[INTENTIONALLY LEFT BLANK]