Scanivalve DSA 3000 Series Troubleshooting guide

DIGITAL SENSOR ARRAY
DSA 3000 Series Modules
DSA3017
DSA3018
DSA 3200 Series Modules
DSA3217
DSA3218
INSTRUCTION AND SERVICE MANUAL
11/2010

TABLE OF CONTENTS
SPECIFICATIONS - DSA 3017/3217/3018/3218. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
GENERALDESCRIPTION...........................................................3
GETTINGSTARTED................................................................4
HARDWARE................................................................4
SOFTWARE................................................................4
HARDWAREINSTALLATION.........................................................6
DSA3017/3217..............................................................6
DSA3018/3218..............................................................7
DSA3217-DigitalOutModule..................................................8
DigitalI/OConnections..................................................9
DSA3217 - Individual Reference Module.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
POWER REQUIREMENTS DSA3017/3217/3018/3218.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
EXTERNAL TRIGGER REQUIREMENTS.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
DSA3017/3018Modules...............................................12
DSA3217/3218Modules...............................................12
HardwareTrigger...............................................12
SoftwareTrigger...............................................12
RS232COMMUNICATIONS..................................................13
ETHERNETCONNECTIONS..................................................14
10Base-2...........................................................14
10Base-T...........................................................14
CONTROLVALVES.........................................................15
StandardModules. ...................................................15
PneumaticInputs...............................................15
Standard Modules Control Pressure Truth Table. . . . . . . . . . . . . . . . . . . . . . . 15
QuickZeroCalibrations..........................................16
AbsoluteModules.....................................................17
PneumaticInputs...............................................17
Absolute Modules Control Pressure Truth Table.. . . . . . . . . . . . . . . . . . . . . . . 17
QuickBaroCalibration...........................................18
Isolate-PurgeValves. .................................................19
Isolate-Purge Mode Procedure.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
PNEUMATICINTERFACEPANELS.............................................20
DSA3017...........................................................20
DSA3217...........................................................21
DSA3018...........................................................22
DSA3218...........................................................23
Splash Plate Removal and Re-Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
MAINTENANCE..................................................................25
DSA3017/3018SeriesModules................................................25
CircuitBoards........................................................25
ExcitationBoard. ..............................................25
ProcessorBoard. ..............................................25
PowerSupplyBoard. ...........................................25
Ethernet Interface Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
SerialAdapterBoard............................................25
ii

Analog to Digital Converter Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
CalibrationValves..............................................25
DSA3217/3218SeriesModules................................................26
CircuitBoards........................................................26
ExcitationBoard. ..............................................26
ProcessorBoard. ..............................................26
PowerSupplyBoard. ...........................................26
Analog to Digital Converter Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
CalibrationValves..............................................26
SPECIALPROCEDURES. .........................................................29
DSA3017/3018/3217/3218....................................................29
SensorReplacement..................................................29
DSA3017/3018 Firmware Replacement.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
DSA3217/3218 Firmware Replacement/Upgrade.. . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
DSA 3017/3217 Pneumatic Jumpering for “QUICK ZERO”.. . . . . . . . . . . . . . . . . . . . . 34
DSA 3018/3218 Pneumatic Jumpering for “QUICK ZERO”.. . . . . . . . . . . . . . . . . . . . . 35
DSA 3018/3218 Operations for Freon Applications.. . . . . . . . . . . . . . . . . . . . . . . . . . . 36
NETWORKCONFIGURATION.......................................................37
IsolatedNetwork............................................................37
Integrated with System Network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Sub-NetworkwithGateway....................................................37
CLIENT/HOSTOPTIONS...........................................................38
PC-TCP/IP................................................................38
PC-UDP..................................................................38
PC-LabView...............................................................38
PC-DSALink3..............................................................38
PC-OPCServer............................................................38
PC-WindowsHyperTerminal...................................................38
DSANETWORKADDRESSING......................................................39
iii

FIGURES and ILLUSTRATIONS
Figure1-DSA3217.................................................................5
Figure 2 - Mounting and configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 3 - DSA 3018/3218 Mounting and configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 4 - DSA3217 - Digital Output Module Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 5 - DSA3217 - Digital Output Module - Digital Output wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 6 - DSA3217 - Individual Reference Module Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 7 - DSA 3017/3018/3217/3218 Power Wiring.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure8-Triggerwiring. ...........................................................12
Figure 9 - RS232 / External trigger test cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 10 - DSA 3000 Series 10Base-T cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 11 - Standard Modules Control Pressure Truth Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 12 - Quick Zero Valve Logic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 13 - Absolute Modules Control Pressure Truth Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 14 - Absolute Valve Logic.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 15 - Isolate-Purge schematic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 16 - DSA3017 Pneumatic Interface Panels.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 17 - DSA3217 Pneumatic Interface Panels.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 18 - DSA 3018 Pneumatic Interface Panels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 19 - DSA 3218 Pneumatic Interface Panels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 20 - Splash plate installation.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 21 - DSA 3017 Exploded view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 22 - DSA 3018/3218 Exploded view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 23 - Quick Zero Valve Mounting.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure24-SensorReplacement......................................................30
Figure 25 - DSA temperature compensated sensor labels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 26 - DSA 3017/3217 quick zero jumpering. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 27 - DSA 3018/3218 quick zero jumpering. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
iv

SPECIFICATIONS - DSA 3017/3217/3018/3218
Pressure Inputs: 16 (Standard), or 8 (True Differential)
Input Fittings:
DSA3017/3217 Px Inputs - .063 inch Tubulation
Control Inputs - .063 inch Tubulation
DSA3018/3218 Px Inputs - 1/8 inch Swagelok
(1/16 and 1/4 inch Swagelok optional)
Control Inputs - 1/8inch Swagelok
(1/16 and 1/4 inch Swagelok optional)
Full Range Scales:
Differential ±10" WC, 1, 2.5 ,5, 15, 30, 50, 100, 250, 500, 750, 850 psid
(±2.5, 7, 17, 35, 100, 210, 345, 700, 1725, 3500, 5170, 5860 kPa)
Absolute 15, 30, 50, 100 and 250 psia
(100, 210, 345, 700 and 1725 kPa)
Accuracy (differential):
10" WC ± 0.2% of full scale
1 psid ± 0.12% of full scale
2.5 psid ± 0.08% of full scale
5 to 500 psid ± 0.05% of full scale
501 to 850 psid ± 0.08% of full scale
Accuracy (absolute): With CALB performed Without CALB performed
15 psia ±0.05% of full scale ±0.10% of full scale
30 psia ±0.05% of full scale ±0.10% of full scale
50 psia ±0.05% of full scale ±0.10% of full scale
100 psia ±0.05% of full scale ±0.10% of full scale
250 psia ±0.05% of full scale ±0.10% of full scale
Overpressure Capability
10" WC 2 psi (13.79 kPa)
1 psid 5 psi (35 kPa)
2.5 to 499 psid 200%
500 psid 150%
750 psid 113%
850 psid 100%
I/O and mating Connectors
Ethernet 10Base-2 BNC(RG58)
Ethernet 10Base-T
DSA 3017/3217 RJ45
DSA 3018/3218 PT06A-8-4S-SR
Trigger (bulkhead/mating) PT02A-8-2P/PT06A-8-2S-SR(SN 179 and below)
Trigger/RS232 (bulkhead/mating) JTP02RE8-6P/JTO1RE8-6S-SR(SN 180 and up)
Power (bulkhead/mating) PTO2A-8-3P/PT06A-8-3S-SR
1

Power Requirements
DSA 3017/3217 20 to 36 Vdc @ 8W
DSA 3018/3218 No Heater 22 to 36 Vdc @ 8W (Nominal 28Vdc).
With Heater 22 to 36 Vdc @ 35W (Nominal 28Vdc). Power
requirements will drop to 8 W after the module
has reached temperature.
Maximum Reference Pressure 250 psid (1725 kPa) or sensor overpressure, whichever is less
Media Compatibility Gases compatible with silicon, silicone, aluminum, and stainless
steel
Communications Protocol Ethernet IEEE 802.3
Typical Data Acquisition Rate
DSA3000 Series 45 sample/channel/sec TCP/IP ASCII (Engineering Units)
DSA3200 Series 200 samples/channel/sec TCP/IP ASCII (Engineering Units)
500 samples/channel/sec UDP Binary
Typical Communications Rate
Ethernet 10 Mbits/sec
RS232 DSA3000 Series - 1200 to 19200 BAUD (Back Door)
DSA3200 Series - 1200 to 19200 BAUD (Configuration Only)
Weight DSA3017/3217 6.4lbs (2.91kg)
DSA3018/3218 9.78 lbs (4.45kg)
Dimensions (LxWxH)
DSA3017/3217 7.08in (178.3mm) X 2.86in(72.6mm) X 3.40in(86.4mm)
DSA3018/3218 9.0 in (228.6mm) X 4.08 in(103.6mm) X 6.97in(177mm)
Operating Temp
DSA 3017/3217 0 to 60EC
DSA 3018/3218 Without Heater - 0 to 60EC
With Heater - -55 to 60EC
Cooling Kit available for operation above 55EC
Compensated Range
DSA3000 Series 0 to 59EC
DSA3200 Series 0 to 69EC
Total Thermal Error Less than ±0.001% FS
2

GENERAL DESCRIPTION
The Digital Sensor Array is a stand alone temperature compensated electronic pressure scannerwhich can
accept up to 16 pneumatic. Each Digital Sensor Array incorporates 16 individual, temperature
compensated, piezoresistive pressure sensors with an A/D converter and a microprocessor to create an
intelligent pressure scanner. Each pressure sensor is characterized for pressure and temperature from 0 to
59 C (DSA3000 Series) or 0 to 69 C (DSA3200 Series) . This information isstored in EEPROM memory in
o o
the module. The DSA 3018/3218 may also include a optional Thermal Control Unit which will maintain the
core module at a temperature of 20EC (other temperatures may be set to meet customer requirements).
This electronic pressure scanning module is specifically designed for use in applications where long
calibration intervals are required and ambient temperatures can vary below 0EC.
The DSA 3017/3217/3018/3218 sensorsare arranged in blocks of eight(8). Each block of eight sensors has
its own individual calibration valve. This valve has four modes of operation:
(1) Operate
(2) Calibrate
(3) Purge
(4) Isolate
The modes are selected by applying control pressures in a predetermined logical order. The Digital Sensor
Array calibration valve utilizes "Normally Px" valvelogic wherethe valve defaultsto the operate mode when
no control pressures are applied.
TheDSA3017/3217/3018/3218modulesaremanufacturedina16channelmodel,a16channelmodulewith
individual references, an 8 channel “true differential” model, and a 16 channel absolute model.
The DSA 3017/3217/3018/3218 modules are powered by a nominal +28Vdc.
3

GETTING STARTED
HARDWARE
The Digital Sensor Array is a self-contained pressure scanning system. It requires minimal interfacing by
a user.
1) Mount the Digital Sensor Array to the test fixture using themountingholesprovided or the
Mounting Bracket provided with the unit. The mounting bracket may be mounted on the
side of the module. Mounting dimensions and other information may be found in figures 2
and 3.
2) Connect +28Vdc to the unit. Wiring information may be found in figure 7.
3) If the module is a DSA 3217 or DSA 3218 and the IP Address must be modified to operate
in the user’snetwork, theRS232/Trigger cable must be connected. TheIP Addresscan only
be modified by following the DSA3200 Boot Parameter Modification procedure in the
DSA3200 Software Specification. The DSA Software Specification is a separate manual.
If the module is a DSA 3017 or DSA 3018, the IP Address is changed using the IPPADDR
command and can be done through ethernet communications.
4) Connect the Ethernet link. Refer to page 14 for more information on the Ethernet
connections.
5) If external triggering is to be used, connect the Trigger Input. Wiring information may be
found in figures 8 and 9.
6) Connect the Control Pressures. Control pressure are explained starting on page 15.
Control pressure truth tables may be found on pages 15 and 17.
7) Connect the Px inputs.
8) Allow a minimum of 30 minutes for warmup. However, in many cases, a one hour warmup
is preferred.
9) Whenthesensortemperatureshavestabilized,executeaCALZcommandbeforeacquiring
data. If themodule, andsensortemperatures, change more than 3 degrees C between data
points, the CALZ command should be executed before acquiring the data.
SOFTWARE
Communication with the Digital Sensor Array must use one of the following methods:
a) Ethernet (10base-2 or 10Base-T) TCP/IP or UDP
b) National Instruments LabVIEW*
c) Scanivalve Corp DSALink3
d) Windows* HyperTerminal
e) Scanivalve Corporation’s LabVIEW** Configuration Utility
* Windows is a registered trademark of Microsoft Corporation.
** LabVIEW is a registered trademark of National Instruments, Inc.
4

Figure 1 - DSA3217
5

HARDWARE INSTALLATION
DSA3017/3217
Figure 2 shows the DSA 3217 with the Universal Mounting Bracket. Dimensions are in inches and
(millimeters).
Figure 2 - Mounting and configuration
6

Figure 3 - DSA 3018/3218 Mounting and configuration
DSA3018/3218
Figure 3 shows the DSA 3018/3218 with the Universal Mounting Bracket. Dimensions are in inches and
(millimeters).
7

DSA3217 - Digital Out Module
The DSA3217 -Digital Output Module is a special version of the DSA3217. It incorporates a special section
to provide five digital outputs. The condition of the outputs are controlled by a Digital Output Command in
the DSA3200 software. The Trigger and Power connectors are configured exactly as a standard DSA3217.
Control pressures are also identical to a standard DSA3217. This information may be found in following
sections of this manual. Information on the Digital Outputs may be found on page 9. Dimensions are in
inches and (centimeters).
Figure 4 - DSA3217 - Digital Output Module Mounting
8

Digital I/O Connections
The DSA3217 - Digital Output Module has a maximum of five(5) Digital Outputs.
The Digital Outputs are powered directly by the DC input voltage input. It is recommended that the
usersupply becapableof providing sufficientcurrent drivefortheDSA3217andthe Digital Outputs.
Each Digital Output requires approximately 500 mA @ 24 Vdc.
Figure 5 shows the wiring of the Digital Outputs.
Figure 5 - DSA3217 - Digital Output Module - Digital Output wiring
9

DSA3217 - Individual Reference Module
The DSA3217 - Individual Reference Module is another special version of the DSA3217. It incorporates
a reference tube for each input. The reference inputs are not “valved”, that is, these inputs are not
switched during transitions of the control valves. The control valve logic is identical to a standard
DSA3217. The Trigger and Power connectors are also configured exactly as a standard DSA3217. This
information may be found in following sections of this manual. Figure 6 shows the mounting information.
Dimensions are in inches and (centimeters).
Figure 6 - DSA3217 - Individual Reference Module Mounting
10

POWER REQUIREMENTS DSA3017/3217/3018/3218
The DSA3017/3217 requires 28±8Vdc at approximately 8 W. This will remain constant while the module is
operating normally. The DSA3018/3218 requires 28±8Vdc at approximately 8 W. The power requirements
for these modulesincrease to 28±8Vdc at approximately 35 W if the optional heater is installed. The power
requirements will drop when the module reaches the normal operating temperature. If the module is used
in an environment where the ambient temperature is 0EC or less, power requirements could remain high.
Power connections are made through a three pin connector located on the side of the module. The pinouts
of the connector may be found in figure 7.
Figure 7 - DSA 3017/3018/3217/3218 Power Wiring
11

EXTERNAL TRIGGER REQUIREMENTS
The Digital Sensor Array scan functions may be synchronized with other data acquisition devices by using
the external trigger.
DSA 3017/3018 Modules
The 3000 Series Modules may be triggered by a hardware trigger. The external trigger input is
optically isolated to prevent grounding problems. It is a CMOS level, edge sensing device. It
requires a minimum signal of 9Vdc @ 6.5 mA. It may accept voltages as high as 15 Vdc. The
external trigger will only be active if XSCANTRIG isset to 1. When a SCAN command is issued by
the Client/host, the module enters the SCAN mode and waits for a trigger. The module will return
an averaged frame of data for each trigger pulse received. This will continue until the
Frames_per_Scan variable value is met, or until a STOP command is issued.
DSA 3217/3218 Modules
The 3200 Series modules may be triggered by a hardware or software trigger.
Hardware Trigger
The external trigger input is optically isolated to prevent grounding problems. It is a TTL
level, edgesensing device. It requires aminimum signal of 9Vdc @ 6.5 mA. It may accept
voltages as high as 15 Vdc. The external trigger will only be active if XSCANTRIG is set to
1. When aSCANcommandis issuedby the Client/host, themoduleenterstheSCAN mode
and waits for a trigger. The module will return an averaged frame of data for each trigger
pulse received. This will continue until the Frames_per_Scan variable value ismet, or until
a STOP command is issued.
Software Trigger
The software trigger will only be active if XSCANTRIG is set to 1. When a SCANcommand
is issued by the Client/host, the module will enter the SCAN mode and wait for a trigger. An
averaged frame of data will be output as soon as the TRIG command or a <TAB> character
(9HEX or Control I) isreceived. Data will be outputwitheachsuccessive trigger command.
This will continue until the Frames_per_Scan variable value is met, or until a STOP
command is issued.
DSA 3017/3018 Modules Serial Number 180 and higher and all DSA 3217/3218 modules use a 6 pin
connector for a combination Trigger and Serial Communications Interface. The wiring of the trigger input
connector for both configurations is shown in figure 8.
Figure 8 - Trigger wiring
12

Figure 9 - RS232 / External trigger test cable
RS 232 COMMUNICATIONS
Every DSA3200 Series Module has an RS 232 output. It is available at the Serial Communications/Trigger
Connector. It is designed to be used to configure the module, upload coefficients and operating system
upgrades, and provide emergency communications. The wiring of the RS 232 output is shown in figure 10.
NOTE: The cable wiring must connect the Tx output from the host computer to the Rx input of the DSA
module. Also the Rx input of the host computer must connect to the Tx output of the DSA module.
AcombinationRS22 andExternalTriggercable(ScancoPN155829)isavailableasanoption.If the optional
cable is not ordered, then the mating connectors are supplied with every DSA3018/3218 order. The cable
is shown below along with a recommended wiring diagram.
13

Figure 10 - DSA 3000 Series 10Base-T cables
ETHERNET CONNECTIONS
The DSA 3017/3018 has provisions for 10Base-T or 10Base-2 Ethernet connections. The DSA 3217/3218
only supports 10Base-T.
10Base-2
The 10Base-2 connection is a BNC connection. Each module is provided with a BNC-T connector
and a 50 ohm terminator. Modules configured for 10Base-2 are connected in a multi-drop
configuration. Each module has a BNC-T connected at the BNC connector. A coaxial cable is run
from the host computer and connected module to module. A 50 ohm terminator must be connected
to BNC-T connector at the host computer and the last module in the string. The maximum number
of module that may be connected on a 10Base-2 string is 1024. The minimum length of coaxial
cable betweenmodulesis0.5 meters.The maximum length of the10Base-2string is1.5kilometers.
It is recommendedthat IEEE 802.3 coaxial cable (Belden-E 82907 or equivalent) be used, but RG-
58 coaxial cable will function correctly.
10Base-T
DSA 3017/3217 series modules use a standard Category 5 RJ45 connection. Shielded Category
5 cable is recommended. All DSA3018/3218 modules use a Bendix connector at the module, which
must be interfaced to the standard RJ-45 connector. A 10Base-T connection may be straight
through(pin to pin) or crossover. A straight through cable must be used if the module is connected
to a hub. Crossover connections are used if the module is connected directly to the host computer.
It is recommended that shielded Category 5 cable be used for 10Base-T cables.
14

CONTROL VALVES
The Digital Sensor Array does not require control pressures for normal operation. It does require control
pressures if a multipoint or quick zero calibration is to be performed. Truth tables are different for each
module type.
Standard Modules
Pneumatic Inputs
Pneumatic inputs consist of: 16 - Px Inputs, Control Pressure Inputs, and Calibration/Reference
Inputs. Each valve block has its own set of pneumatic inputs.
All Px inputs are .063 inch tubulations or Swagelok fittings depending on the module. Each valve
block containseight(8)Px inputs.DigitalSensorArray modulesare capable of measuring pressures
up to 850 psid.
Control inputs consist of: CTL1, CTL2, CTL, and RTN. These inputs are used to switch the valve
logic to each of the five(5) states: Operate, Calibrate, Quick Zero, Purge, and Isolate. The pressure
required to switch the valve logic is dependent upon the input pressure. 90 psi is required for input
pressuresup to500 psi. Input pressures greater than 500 psi require 120 psi control pressures. The
Control inputs are .063 inch tubulations in a DSA3017/3217or 1/8 inch Swagelok fittings in a
DSA3018/3218. The Digital Sensor Array module is only available in the ISO-Purge Valve
configuration. Figure 11 shows the ISO-Purge Valve Logic.
Calibration/Reference Inputs consist of a Calibration input and a Reference input. These inputs are
.063 tubulations in a DSA3017/3217 or .1/8 inch Swagelok fittings in a DSA3018/3218. The
Calibration input is normally connected to a source of calibration pressures. Internally, this input is
manifolded to all of the sensors through the calibration valving. The Reference input provides a
point of reference for the transducers. All of the sensors in each block of eight share a single
reference.
MODE CTL1 CTL2 CTL* CTLPRG
Operate
Calibrate 90 psi 90 psi
Quick Zero 90 psi 90 psi 90 psi
Purge 90 psi 90 psi 90 psi
Isolate 90 psi
* CTL is generated by the DSA module
NOTE: Control Pressures may be increased to 120 psi for operation at 850 psi FS
Figure 11 - Standard Modules Control Pressure Truth Table
15

Figure 12 - Quick Zero Valve Logic
Quick Zero Calibrations
The Quick Zero Calibration is usedto make the minorcorrectionsthat may benecessaryto maintain
the Digital Sensor Array accuracy. The Quick Zero function corrects the small zero drift problem
inherent inpiezoresistivesensors. AfunctionaldrawingoftheStandardValvewithQuickZeroLogic
is shown in Figure 12. The operation of the Quick Zero Calibration is described in the Special
Procedures section on pages 34 and 35 of this manual. Scanivalve Corp recommends that a Quick
Zero Calibration (CALZ) is performed daily, any time the temperature of the module varies more
than 3°C or before any test is performed.
16
This manual suits for next models
5
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