Heisei Electronics DXD Series User manual

I
All specifications are subject to change without notice.
All sales subject to standard terms and conditions.
© 2016 Ashcroft Inc. 10/16 I&M002-10106 Rev. C
DXD Series
Precision Digital
Pressure Transducer
Operation and
Maintenance Manual
SECTION 1.
Part 1. Installation And Operating Instructions.
Part 2. Command Library And Communication Specification.
SECTION 2.
DXD Setup Utility Manual

II

1
TABLE OF CONTENTS SECTION TOPIC PAGE
Section 1.0 Introduction ........................................................................................................3
Section 2.0 Cautions..............................................................................................................3
Section 3.0 Theory of Operation ...........................................................................................3
Section 4.0 Unpacking...........................................................................................................4
Section 4.1 DXD Transducer(s) ..............................................................................................4
Section 4.2 Certificate of Calibration .....................................................................................4
Section 4.3 Utility Software ...................................................................................................4
Section 4.4 Accessories (RS-232 Configurations only) .........................................................4
Figure 1. Modular Power Supply with RJ11/4 Connector ..................................4
Figure 2. Serial Port Adapter Assembly..............................................................5
Section 4.4.3 25 to 9 Pin Adapter..........................................................................................5
Section 4.4.4 25 Foot Cable ..................................................................................................5
Section 4.4.5 Five-Port Expander Module.............................................................................5
Section 4.4.6 Limitations of the DXD w/USB option .............................................................6
Section 5.0 Installation...........................................................................................................6
Section 5.1 Pressure Connections.........................................................................................6
Section 5.2 System Wiring ....................................................................................................6
Section 5.2.1 RS-232 Cables.................................................................................................6
Section 5.2.2 RS-485 Cables.................................................................................................6
Section 5.2.3 USB Cables .....................................................................................................6
Section 5.2.4 Cable Length and Transmission Speed (RS-232 & RS-485) ...........................7
Section 5.2.5 Pin Functions and Cable Fabrication for RS-232 Compatible Systems..........7
Section 5.3 Installation Wiring for RS-232 Systems with Accessory Kit ...............................7
Section 5.3.1. Pin Functions and Cable Fabrication for RS-232 Compatible Systems.........7
Table 1. Switchcraft™ EN3 Pin Assignments for RS-232 Configuration............8
Table 2. ITT Cannon™ KPT03 Pin Assignments for RS-232 Configuration .......8
Table 3. RJ-11 Connector Functions for RS-232 Systems.................................8
Section 5.4 Wiring Installation for RS-485 Systems ........................................................ 9-11
Section 5.4.1 Pin Functions and Cable Fabrication for RS-485 Compatible Systems........12
Table 4. Switchcraft™ EN3 Pin Assignments for RS-485 Configuration..........10
Table 5. ITT Cannon™ KPT03 Pin Assignments for RS-485 Operation ...........11
Figure 3. USB cable assembly..........................................................................12
Section 5.5 Wiring System for USB applications.................................................................12
Section 6.0 Installing and Running Utility Software.............................................................14
Section 7.0 Using HyperTerminal™ (or other Terminal Emulators) with the DXD ................14
Section 7.1 Configuring HyperTerminal™...................................................................... 14-15
Section 7.2 Basic Communications with the DXD ..............................................................15
Section 7.2.1 Communication and Command Basics.........................................................15
Section 7.3 Launching the Previously Configured HyperTerminal Application....................15
Section 7.4 Talking to the DXD with HyperTermnal™..........................................................15
Section 7.4.1 Determine and Set the Current Address.................................................. 15-16
Section 7.4.2 Determine and Set Baud Rate .......................................................................16
Section 7.4.3 Determine the Pressure Type.........................................................................17
Section 7.4.4 Determine the Full Scale Pressure Range .....................................................17
Section 7.4.5 Get a Pressure Reading.................................................................................17
Section 7.4.6 Get the Heise Label .......................................................................................17
Section 7.4.7 Get and Change the Current User Label .......................................................17
Section 7.4.8 Get and Change the Current User Tare Value................................................17
Section 8.0 Field Calibration................................................................................................18
Section 8.1 Zero Adjustment ...............................................................................................18
Section 8.2 Span Adjustment ..............................................................................................18
Section 9.0 Command Library Command Specification ............................................... 18-19
Section 9.1 Communication Settings ..................................................................................19
Section 9.2 Communication Protocol..................................................................................19
Section 9.2.1 Read Commands...........................................................................................19
Section 9.2.2 Write Commands...........................................................................................19
Section 9.3 Command Library Mnemonics .........................................................................19
Section 10.0 DXD Product Specifications ..................................................................... 20-21

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COMMAND LIBRARY COMMUNICATION SPECIFICATION
DXD Firmware Change Summary:....................................................................................... 23-24
Communications Introduction...................................................................................................25
Comunications Settings ............................................................................................................25
Communications Protocol.........................................................................................................25
Eeprom Lock ............................................................................................................................26
Command Library Mnemonics .................................................................................................26
AD Unit Address ................................................................................................................26
BR Baud Rate ...................................................................................................................27
ED Eeprom Memory Map Dump........................................................................................27
EF Error Flag.....................................................................................................................28
ER Read From Eeprom Address........................................................................................28
EW Write To Eeprom Address.............................................................................................28
EZ Eeprom Zero (Initialize Eeprom) ...................................................................................29
FA Filter Amount................................................................................................................29
FB Filter Band....................................................................................................................30
FS Full Scale Value ............................................................................................................30
FV Firmware Version..........................................................................................................31
HI Heise Label (Serial Number).........................................................................................31
PS Psi Reading ..................................................................................................................31
PT Pressure Type...............................................................................................................31
RC Raw Counts.................................................................................................................32
ST Sensor Temperature .....................................................................................................32
UL User Label ....................................................................................................................32
US User Span ....................................................................................................................33
UT User Tare ......................................................................................................................33
UZ User Zero .....................................................................................................................34
BA Bar Reading .................................................................................................................34
CW Cm Of Water Reading ..................................................................................................34
FW Feet Sea Water Reading ..............................................................................................35
HP Hectopascal Reading...................................................................................................35
IM Inches Of Mercury Reading..........................................................................................35
IW Inches Of Water Reading .............................................................................................35
KP Kilopascal Reading ......................................................................................................36
MB Millibar Reading ...........................................................................................................36
MM Mm Of Mercury Reading..............................................................................................36
MP Megapascal Reading ...................................................................................................36
NP Numeric Value ..............................................................................................................36
Transducer Command Summary ..............................................................................................37
Read Command Summary........................................................................................................37
AEU Command Summary .........................................................................................................38
Write Command Summary........................................................................................................37
Error Codes (Legacy Mode) ......................................................................................................37
AEU Scale Factors ....................................................................................................................38
Mode Byte.................................................................................................................................38
Detailed Explanation of the “FA” & “FB” Commands................................................................40
Alternate Engineering Units (AEU) Explained ............................................................................42
Update Rate Modifications........................................................................................................42
Synchronous Read Command (Addendum A) .........................................................................44
Read Commands Summary ......................................................................................................45
ATS Varient (Addendum B) ........................................................................................................46
DXD Receiver to Transmit Delay Capabilities (allows half duplex operation in RS-485)..........48
ASCII Character Code Table (page 26 of Installation and Operation Instructions)
DXD Set-up Utility, Manual/Software .................................................................................. 51-71
TABLE OF CONTENTS (cont.)

3
Congratulations on your purchase of a DXD Series Digital Pres-
sure Transducer. This transducer provides unmatched perfor-
mance and value. Innovative modeling and processing firmware
assures extremely high precision over a broad temperature range
as well as extremely fast response. Please read the following
cautions and instructions carefully in order to take full advantage
of the product’s capabilities.
Pressure instruments must be selected in accordance with indus-
try codes and safety practices to avoid the possibility of misuse
or misapplication, which could result in personal injury or property
damage. Personnel responsibility for selection and installation
should also be familiar with the safety recommendations of ANSI/
ASME B40.100-2013, that apply to elastic pressure elements
and their application general and specific services. ANSI/ASME
B40.100-2013 is available from:
ASME
Two Park Avenue
New York NY 10016-5990
Email: [email protected]g
• Select a range so that the maximum applied pressure will never
exceed the upper range limit.
• Excessive vibration could cause loosening of components
resulting in loss of instrument accuracy or failure to provide
valid data.
• Excessive pressure pulsation could result in fatigue failure of the
pressure element.
• Operation of the instrument in an environment where tempera-
tures are in excess of design ratings may result in loss of accu-
racy or failure.
• Pressure boundary materials must be resistant to the process
media. Failure to ensure compatibility may result in pressure
sensing element deterioration or failure. Instruments used on
high pressure gas, or potentially hazardous service, such as
oxygen should be carefully selected in accordance with the
recommendations of ANSI/ASME 40.100-2013.
• Only approved explosion proof or intrinsically safe instruments
should be used in hazardous locations.
• Instruments used in locations where EMI/RFI conditions exist
may exhibit erroneous performance.
• These instruments are not explosion proof or intrinsically safe.
Power levels present preclude use in hazardous locations.
The DXD transducer design employs a piezo resistive strain
gauge, a 24 bit A/D converter, microprocessor, and a 20 MHz
clock. The A/D resolution is internally reduced to 50,000 counts
in order to optimize signal to noise ratio. The raw data is pro-
cessed with a proprietary algorithm which employs a 4th order
polynomial. The math package fits both temperature and pressure
signals from the transducer using coefficients calculated from the
outputs of pressure and temperature standards during the calibra-
tion process. The internal update rate can be can be set to 27.7
mS or 12.6 mS. The DXD responds to a simple ASCII command
protocol. The total transmit/receive time is for fully corrected pres-
sure data is 30 mS (when set to 27.7 mS) and 15 mS (when set to
12.6 mS) at 115200 bps. There may be a slight reduction in signal
stability (1 to 3 counts) when operated at 15 mS, as the difference
in signal processing time is gained at the expense of filtering in
the processor. The firmware supports addressable, multi-drop
operation (except when equipped with the USB option and using
ASHCROFT provided utility software). Electrical communications
are via full duplex RS-232, RS-485 or USB standards. The maxi-
mum resolution is 50,000 counts.
SECTION 1.0 INTRODUCTION
SECTION 2.0 CAUTIONS
SECTION 3.0 THEORY OF OPERATION

4
Please note: When handling connectors care should be used
to avoid electrostatic discharge to prevent damage to the
electronics. The power pins are reverse polarity protected.
Use caution if fabricating connector and cable assemblies
because the digital I/O lines are not protected from the inad-
vertent application of power.
Following is a description of material included in shipment.
The DXD is available in a variety of standard pressure ranges
and types as specified at time of order. It is configured for
either RS-232, RS-485 or USB operation at the factory as
specified at time of purchase. The output is not field configu-
rable. Please check the product label to ensure that the pres-
sure range and output signal type are correct.
Each DXD is provided with a report of calibration traceable to
NIST. The report is packaged with the transducer.
Software is provided on a Flash Drive (Memory Stick). The
Windows™ compatible (WinXP™, Win7™ or Win10™) soft-
ware simplifies the setup and installation of the DXD. It also
provides powerful data logging and pressure display capa-
bilities. Win7™ and WinXP™ compatible LabVIEW™ drivers
along with the LabVIEW™ Runtime Engine are also available.
The following accessory items are available individually or in
kit form at time of order. These accessories are designed for
use with the RS-232 version of the product. The DXD with
complete kit options includes the following items:
The AC Adapter supplies 12 VDC power @500 mA (Fig.1)
connects to the Serial Port Converter and the DXD Trans-
ducer (s) which are interconnected, forming a “network”. The
DXD has its own regulated power supply (internal DC to DC
Converter) and is protected against spikes and power supply
reversal. Each DXD consumes approximately 300 milliwatts,
or 15 ma at 20 volts. The power supply can be plugged in
anywhere along the network, it does not need to be near
the Serial Port Converter. The contact rating of the RJ11/4
(telephone type) connector is 1.5 amps which provides a fast
economical method of interconnection.
Figure 1. Modular Power Supply with RJ11/4 Connector
(831X015-01 Shown)
SECTION 4.0 UNPACKING
SECTION 4.2 CERTIFICATE OF CALIBRATION
SECTION 4.1 DXD TRANSDUCERS
SECTION 4.3 UTILITY SOFTWARE
SECTION 4.4 ACCESSORIES
SECTION 4.41 MODULAR POWER SUPPLY

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The Serial Port Converter consists of electronics housed in a
standard DB25 enclosure assembly. It has a standard DB25
female RS-232 socket on one end and two RJ11/4 jacks
on the other. The DB25 side plugs into a standard 9 pin to
25 Pin Converter or into a USB-RS-232 Adapter. The Serial
Port Converter ‘s function is to amplify and buffered standard
RS-232C signals so that up to 99 DXD transducers can be
connected in parallel in any configuration, Daisy Chain or
Star. One converter is required per 99 units. The converter
can drive extension cables up to 1000 feet (total cable length)
and still maintain data integrity while communicating at high
speed with each transducer.
Figure 2. Serial Port Converter.
A 25 pin to 9 pin adapter is provided to facilitate connecting
to the Serial Port Converter’s DB25 pin connector to a com-
puter or terminal serial port having a DB9 connector.
The 25 foot cable connects the DXD to an Expander Module
(see below) or directly to a Serial Port Converter. The cable is
provided with a Switchcraft™ or Cannon™ connector on one
end and an RJ11/4 (telephone-type) connector on the other.
Pushing the female connector onto the male socket and then
securing the connector with the sleeve by turning the sleeve
until it locks in place makes connection to the DXD.
A five port expander module consists of a block with five
female RJ11/4 jacks and a six-inch pigtail with a male RJ11/4
connector. The DXD cable plug(s) and the Modular Power
Supply plug are inserted into the available jacks and the male
plug on the pigtail of the five port expander is inserted into
the female jack on the Serial Port Converter.
Figure 3. Five-Port Expander Module
SECTION 4.43 25 T0 9 PIN ADAPTER
SECTION 4.42 SERIAL PORT CONVERTER
SECTION 4.44 25 FOOT CABLE
SECTION 4.45 FIVE-PORT EXPANDER MODULE
H
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6
Note that for DXD units with the USB interface, only the
provided USB cable is required for operation, as all power
is provided through the cable. Each DXD will require its own
USB port on the PC or a powered HUB (not available through
ASHCROFT Inc.)
Due to the limitations of the existing utility provided by
Ashcroft, only one DXD can be addressed at any one time. If
more than one DXD w/USB needs to be communicated with,
an alternate utility program will be required, which should be
provided by the user.
The installation of the product has three basic steps, which
includes making a pressure connection, system wiring
(connecting communication and power cables to the trans-
ducers and a PC or PLC) and installing and running software
to communicate with and set up the DXD transducer.
The standard pressure inlet fitting is a ¼ inch NPTM type
connector for pressures less than 5000 psi (or equivalent)
and 9/16 – 18 UNF 2B Female port for ranges greater than
5000 psi. Optional fittings are available – consult factory for
specific information.
Important Note: The standard vented housing is recom-
mended for gauge pressure types with ranges less than
500 psi. This is because changes in ambient temperature
will increase or decrease the pressure of the gas volume
within the housing, producing an undesirable effect on the
performance of the unit. The housing is vented through the
Switchcraft™ or Cannon™ electrical connector by removing
one of the unused connector pins at the factory. For USB
option devices the enclosure is vented with a porous mem-
brane (see Table 1 and 2). A sealed housing (no connector
pin removed) can be specified at time of purchase if required.
The effect is approximately ±.027 PSI per degree Fahrenheit
change in ambient temperature.
This is not a factor with absolute pressure ranges because
the reference side of the sensor is evacuated and sealed.
The RS-232 configuration requires four conductors for Signal
In, Signal Out, Power Positive and Power Negative. Prefabri-
cated telephone type cables with RJ11 modular connectors
and Switchcraft™ or ITT Cannon™ connectors can be pur-
chased from the factory as a kit for RS-232 configurations.
Other cable and connector combinations can be fabricated
using user supplied, multiconductor wire and connectors per
the following pin function tables. Minimum 26 AWG wire is
recommended.
The RS-485 configuration requires six conductors, two for
Signal In, two for Signal Out, one for Power Positive, and one
for Power Negative. The user can fabricate similar telephone
type cable and modular connectors for RS-485 configura-
tions. This configuration uses eight conductor RJ45 plugs,
sockets and cables, such as Alpha #9314C 24 AWG. Other
cable and connector combinations can be fabricated using
user supplied, multi-conductor wire and connectors. Mini-
mum 26 AWG wire is recommended.
USB configuration requires cabling with a 2.0 Type A Jack
(host system) at one end and a 2.0 Type mini B Jack (DXD
transducer) at the other. The DXD transducer will obtain
power through the cable from the host system. Ensure that
adequate power is available in cases where multiple DXD
transducers are arranged in a network. If the end user is
SECTION 4.46 LIMITATIONS OF THE DXD W/
USB OPTION
SECTION 5.2 SYSTEM WIRING
SECTION 5.0 INSTALLATION
SECTION 5.1 PRESSURE CONNECTION
SECTION 5.2.1 RS-232 CABLES
SECTION 5.2.2 RS-485 CABLES
SECTION 5.2.3 USB CABLES

7
using a software utility capable of addressing more than one
DXD w/USB at a time (note limitations of the Ashcroft Sup-
plied Utility in section 4.6). Use powered hubs if the host sys-
tem’s power requirements are not adequate for total number
of DXD transducers on the network.
Total cable length, wire gauge and total number of transduc-
ers connected to the system have an effect on maximum
communication speed. This is due to the effects of cumula-
tive resistance and capacitance on the signals. The tables in
appendix B illustrate the relationship between cable length,
number of DXD transducers and communication speed. For
USB configurations, standard USB specifications apply.
The DXD is available with a standard Switchcraft™ EN3 elec-
trical connector or an optional ITT Cannon™ KPT03 (Bendix
PTX compatible) electrical connector, or a Mini B USB female
connector.
Typical RS-232 System Configuration
The following information is provided for reference if you wish
to fabricate your own cables. The Switchcraft™ EN3 connec-
tor has eight pins. The RS-232 configuration utilizes four pins
with the following assignments and functions:
SECTION 5.2.4 CABLE LENGTH & TRANSMIS-
SION SPEED (RS232 & RS-485)
SECTION 5.2.5 TRANSDUCER CONNECTIONS
SECTION 5.3 INSTALLATION WIRING FOR
RS-232 SYSTEMS WITH
ACCESSORY KIT
SECTION 5.3.1 PIN FUNCTIONS & CABLE
FABRICATION FOR RS-232
COMPATIBLE SYSTEMS
Ashcroft
P/N 831X015-03,
POWER SUPPLY
Ashcroft
Pt. # 838X002-01,
25 TO 9 Pin
ADAPTER
Ashcroft
Pt. # 838X003-01,
SERIAL PORT
ADAPTER
Ashcroft
Pt. # 838X001-01,
5 PORT
EXPANDER
HOST PC
RS-232

8
1
2
3
4
5
6
7
8
N/A
SUPPLY (+)
N/A
DIGITAL OUTPUT
N/A
DIGITAL INPUT
SUPPLY COMMON
N/A
*PIN FUNCTION FOR
RS-232 APPLICATION
“SWITCHCRAFT”
CONNECTOR PIN
I.D.
*IMPORTANT
REQUIRES USE OF
SERIAL PORT
CONVERTER (#838X003)
FOR RS-232
FUNCTIONALITY
POSITION #1
POSITION #4
POSITION #7
POSITION #2
POSITION #3 POSITION #5
POSITION #6
POSITION #8
PIN ID INDEX RIB LOCATED
AT BOTTOM OF RECESS.
INDEX RIB IS ALIGNED WITH INDEX GROOVE
ON OPPOSITE END OF CONNECTOR.
NO PIN IN THIS POSITION
FOR VENTED CONNECTOR
A
B
C
D
E
F
G
H
N/A
SUPPLY (+)
N/A
DIGITAL OUTPUT
N/A
DIGITAL INPUT
SUPPLY COMMON
N/A
*PIN FUNCTION FOR
RS-232 APPLICATION
“ITT CANNON”
CONNECTOR PIN
I.D.
*IMPORTANT
REQUIRES USE OF
SERIAL PORT
CONVERTER (#838X003)
FOR RS-232
FUNCTIONALITY
EC
G
H
FB
D
A
Table 1. Switchcraft EN3 Pin Assignment for RS-232
Configuration
Solder Cup View
Table 2. ITT Cannon KPT03 Pin Assignment for RS-232
Configuration