Druck DPS 5000 User manual

Druck.com
BHGE Data Classification: Public
DPS 5000
SDI-12 Pressure Transducer
Instruction Manual

© 2019 Baker Hughes, a GE company – All rights reserved. DPS5000 Instruction Manual-English | i
Safety
The manufacturer has designed this sensor to be safe when operated using the procedures
detailed in this manual. Do not use this sensor for any other purpose than that stated.
This publication contains operating and safety instructions that must be followed for safe
operation and to maintain the sensor in a safe condition. The safety instructions are either
warnings or cautions issued to protect the user and the equipment from injury or damage.
Use qualified*personnel and good engineering practice for all procedures in this publication.
Toxic Materials
There are no known toxic materials used in this sensor.
Maintenance
The sensor must be maintained using the manufacturer’s procedures and these should be
carried out by authorized service agents or the manufacturer’s service departments.
Druck.com
For technical advice contact the manufacturer.
WARNING Do not apply pressure greater than the maximum safe working
pressure to the sensor.
* A qualified technician must have the necessary technical knowledge, documentation, special test
equipment and tools to carry out the required work on this equipment.

ii | DPS5000 Instruction Manual-English © 2019 Baker Hughes, a GE company – All rights reserved.
Symbols
Abbreviations
The following abbreviations are used in this manual.
Note: Abbreviations are the same in the singular and plural.
Symbol Description
This equipment meets the requirements of all relevant European safety directives. The
equipment carries the CE mark.
This symbol, in this manual, indicates a hazardous operation.
Do not dispose of this product as household waste. Use an approved organization that
collects and/or recycles waste electrical and electronic equipment. For more information,
contact one of these:
- Our customer service department: Druck.com
- Your local government office.
Abbreviation Description
ADC Analogue to Digital Converter
ASCII American Standard Code for Information Interchange
°C Degrees Celsius
BHGE Baker Hughes, a GE company
cm Centimetres
COSHH Control of Substances Hazardous to Health
CRC Cyclical Redundancy Checking
FS Full-scale
ft Feet
m Metres
mA Milli Ampere
mbar Millibar
ms Milli Second
mV Milli Volt
N/A Not Applicable
PC Personal Computer

© 2019 Baker Hughes, a GE company – All rights reserved. DPS5000 Instruction Manual-English | iii
psi Pound per square inch
R/W Read/Write Access
RX Receive
SDI-12 Serial Data Interface Communication Protocol
TX Transmit
USB Universal Serial Bus
V Volt
Abbreviation Description

iv | DPS5000 Instruction Manual-English © 2019 Baker Hughes, a GE company – All rights reserved.

© 2019 Baker Hughes, a GE company – All rights reserved. DPS5000 Instruction Manual-English | v
Contents
1. Introduction 1
1.1 Manufacturer 1
2. Description 1
2.1 Purpose 1
2.2 Technical Specifications 1
2.3 Design and Principle of Operation 1
3. Installation & Operation 2
3.1 General Requirements 2
3.2 Safety Measures 2
3.3 Connecting to a Pressure Source 3
3.3.1 Media Compatibility 4
3.3.2 Pressure Containment 4
3.4 Power Requirements 4
3.5 Connecting to SDI-12 Network 5
3.6 Maintenance 6
3.6.1 Visual Inspection 6
3.6.2 Cleaning 6
3.6.3 Adjustment 6
3.7 Returned Goods Procedure 6
3.7.1 Safety Precautions 7
3.7.2 Important Notice 7
3.8 Electromagnetic Compatibility 7
3.8.1 Power Supply and Metering 7
3.8.2 Cable Type 7
3.8.3 Earthing 8
4. Programming Guide 8
4.1 SDI-12 Introduction 8
4.1.1 Typical Measurement Sequence 8
4.1.2 Baud Rate and Byte Frame Format 9
4.1.3 Allowable Data Characters 9
4.2 Transducer Address 9
4.3 Command Structure 9
4.4 Command Overview 10
4.4.1 Transducer Identification 10
4.4.2 Transducer Measurement 10
4.4.3 Average Filter Setup 10
4.4.4 Setting Liquid Density 12
4.4.5 Setting Gain and Offset 12

vi | DPS5000 Instruction Manual-English © 2019 Baker Hughes, a GE company – All rights reserved.
4.4.6 Tare 13
4.5 Command Set 15
4.5.1 Basic Command Set 15
4.5.2 Extended Command Set 16
Appendix A. Register Table 17

© 2019 Baker Hughes, a GE company – All rights reserved. DPS5000 Instruction Manual-English | 1
1. Introduction
This manual is applicable to DPS 5000 pressure transducers with the SDI-12 communications
protocol.
The original language of this manual is English.
1.1 Manufacturer
The identified manufacturer of this equipment is:
“Druck Limited”
Fir Tree Lane, Groby, Leicester, LE6 0FH, United Kingdom.
Telephone: [phone]; Fax: [phone]
Internet: Druck.com
2. Description
2.1 Purpose
The DPS 5000 pressure transducers is a micro-controller based smart pressure transducer
that provides a digital output through an SDI-12 interface. The transducer is a sealed device
with the electrical connections made via an integral cable.
The DPS 5000 pressure transducers is a low powered device offering a high level of accuracy
over a wide temperature range. The SDI-12 interface provides compensated pressure and
temperature readings and allows the transducer operation to be software controlled.
The transducers are of a modular design, the parameters of which are chosen by the customer
at the time of order.
2.2 Technical Specifications
Refer to the appropriate DPS 5000 data sheet for technical specifications and explanation of
the transducer's model number.
Model numbers appended with a four or eight-digit alphanumeric string denote the use of a
customer-specific specification drawing indicating the use of additions or deviations to the
data sheet specification. Refer to the specification drawing if applicable.
2.3 Design and Principle of Operation
The transducer consists of a pressure connector, pressure measuring module, a partially
encapsulated electronics module, and electrical connection facilities, structurally combined in
a cylindrical metal housing.
The pressure connector allows the transducer to be mounted to a pressurized vessel or
pipework.

2 | DPS5000 Instruction Manual-English © 2019 Baker Hughes, a GE company – All rights reserved.
The pressure measuring module consists of a welded metal construction, featuring a metal
diaphragm (providing a flexible barrier to harsh process media), a glass-to-metal seal (for
electrical connections) and a fluid filled cavity containing a silicon-based micro-machined
structure.
3. Installation & Operation
3.1 General Requirements
When the transducer is received, check for completeness.
To identify the electrical and pressure connections, refer to the product data sheet or, if
applicable, the specification drawing.
Do not use force when installing the transducer. Do not tighten the transducer by rotating the
housing. For this purpose, a hexagon socket for the wrench is provided on the housing.
The ambient temperature and the process media to be measured must not exceed the ranges
specified in the transducer specification.
In the negative temperature range it is necessary to exclude the accumulation and freezing of
condensate in the working chambers and inside the connecting pipelines for gaseous media
and freezing, crystallization of the medium or crystallization from it, of the individual
components for liquid media.
The materials used for the primary enclosure and pressure bearing surfaces are identified in
the product data sheet or, if applicable, the specification drawing. Make sure that the
materials are applicable for the installation.
Before using the equipment, remove the plastic/rubber protection cap from the pressure
connector.
The DPS 5000 is a harsh media isolated product. Isolation is achieved by hermetically sealing
the transducer element in an oil filled chamber. The weight of this oil gives a g sensitivity as a
pressure offset error.
Note: The g-sensitivity will also create an error in a high vibration environment and the unit
should be mounted accordingly.
3.2 Safety Measures
The operation of transducers in systems whose pressure may exceed the overload values
specified in the data sheet or customer-specific specification drawing is not allowed.
Connection and detachment of transducers from the mains supplying the pressure of the
medium to be measured must be done after the shutoff valve is closed from the process and
the pressure in the working chamber is made equal to atmospheric.
CAUTION Until installation, keep the unit in the original container with all
the covers in position. The container and covers prevent contamination and
damage. When not in use, keep the connections clean at all times, and put the
covers on the open connections.

© 2019 Baker Hughes, a GE company – All rights reserved. DPS5000 Instruction Manual-English | 3
The connecting pipes must have a one-way slope (not less than 1:10) from the pressure
collection point up to the transducer, if the medium to be measured is gas, and down to the
transducer if the medium is liquid. If this is not possible, when measuring gas pressure at the
lower points of the connecting lines, it is necessary to install sludge vessels, and when
measuring the liquid pressure at the highest points, install gas collectors.
Selected devices for mounting transducers should be mounted on straight sections, at the
maximum possible distance from pumps, locking devices, elbows, expansion joints and other
hydraulic devices. It is especially not recommended to install transducers in front of the shut-
off device if the medium to be measured is liquid. If there are water hammer effects in the
system, it is recommended to use a transducer complete with a hydraulic shock dampener.
To reduce the temperature acting on the isolation diaphragm when measuring vapour
pressure, it is recommended to use impulse tubes. The impulse tube must first be filled with
water.
Attach the equipment in a safe configuration that prevents unwanted stress (vibration,
physical impact, shock, mechanical and thermal stresses). Do not install the equipment where
it can be damaged by a material that causes corrosion. Provide additional protection for the
equipment if it may be damaged in service.
When installing power supply and signal wiring, the possibility of condensate entering the
transducer cable entry should be avoided.
3.3 Connecting to a Pressure Source
When mounting the transducer, seal the mating surfaces. Failure to properly seal may affect
performance or calibration accuracy.
Male threaded pressure connectors must not be sealed or constrained against the face at the
base of the thread. The forward cone or flat face should always be used as indicated below.
98

4 | DPS5000 Instruction Manual-English © 2019 Baker Hughes, a GE company – All rights reserved.
3.3.1 Media Compatibility
The media compatibility of the transducers is shown in Table 1.
Note: Fluid classification complies with European Regulation (EC) No 1272/2008. Statements
comply with European Pressure Equipment Directive 2014/68/EU. Refer to document K0581
for product classification and regulatory information.
3.3.2 Pressure Containment
The pressure containment of the transducers is shown in Table 2.
3.4 Power Requirements
The transducer should be connected to a SDI-12 compliant stable power supply. The power
supply requirements are shown in Table 3.
Table 1: Media Compatibility
Product Material Media Compatibilitya
a. Depth versions require compatibility with Hytrel, or polyurethane.
Stainless Steel Fluids compatible with stainless steel 316L and Hastelloy C276.
Titanium Fluids compatible with titanium grades 2 and 4.
Table 2: Pressure Containment
Version Pressure Range Pressure Containment
Absolute 0 to 70 bar
0 to 1015 psi
200 bar maximum
2900 psi maximum
Gauge 0 to 70 bar
0 to 1015 psi
6 x Full-scale up to 200 bar maximum
6 x Full-scale up to 2900 psi maximum
Barometric 0.344 to 1.3 bar
5.0 to 18.9 psi
200 bar maximum
2900 psi maximum
Hyperbaric
(Depth)
0 to 45 bar
0 to 650 psi
45 bar maximum (~450 m of water)
650 psi maximum (~1475 ft of water)
Table 3: Power Supply Requirements
Parameter Value
Supply Voltage 6 to 30 V
12 V nominal
Supply Current
10 mA nominal
< 15 mA peak
< 50 μA sleep

© 2019 Baker Hughes, a GE company – All rights reserved. DPS5000 Instruction Manual-English | 5
3.5 Connecting to SDI-12 Network
The figures below show example connections of the DPS 5000 pressure transducer to a SDI-12
network. Figure 1 shows the pressure transducers receiving power from the data recorder.
Figure 1: Connection with Data Recorder Providing Power
Figure 2 shows the pressure transducers receiving power from individual power supplies. The
power supplies may be battery packs. If battery packs are used, ensure the transducer supply
voltage stays within the operating limits in Table 3 on page 4.
Figure 2: Connection with External Power Supplies
1 DPS 5000 Pressure Transducer 2 +VE Supply, Ground and Data
3 Data Recorder
1 DPS 5000 Pressure Transducer 2 Data and Ground
3 Power Supply 4 +VE Supply and Ground
5 Data Recorder 6 Data and Ground
1
3
2
1
2
5
3
3
4
4
6

6 | DPS5000 Instruction Manual-English © 2019 Baker Hughes, a GE company – All rights reserved.
3.6 Maintenance
3.6.1 Visual Inspection
Inspect the product for damage and corrosion. Any damage to the product must be assessed.
If the housing is no longer sealed against water and/or dust, the product must be replaced.
3.6.2 Cleaning
Clean the case with a damp lint-free cloth and mild detergent.
If the product has been in contact with hazardous or toxic materials, obey all the applicable
Control of Substances Hazardous to Health (COSHH) or Material Safety Data Sheet (MSDS)
references and precautions when handling.
3.6.3 Adjustment
For some models, the Output Calibration, Full-Scale and Offset settings can be adjusted. For
instructions see Chapter 4., “Programming Guide,” on page 7.
Note: BHGE can provide a calibration service that is traceable to international standards.
3.7 Returned Goods Procedure
To repair or calibrate the transducer, return it to the applicable BHGE Service Department.
Please contact our Service Department, and get a Return Authorization number.
Please supply these details:
Table 4: DPS 5000 Cable Colour Identification
Coloura
a. Any other conductor colours in the cable are unconnected.
Name Function
Red +VE Supply +12 V power supply.
Blue Ground Ground return for power supply.
White Data SDI-12 serial data.
Black Case Connected to pressure transducer body tube.
Screen Screen Cable screen, connected to pressure transducer
body tube.
WARNING High pressures and temperatures are dangerous and can cause
injury (Refer to pressure limits in the sales data sheet). Be careful when
working on components connected to lines that have high pressures and
heat. Use the applicable protection and obey all safety precautions.
WARNING Output Calibration, Full-Scale and Offset adjustment may be
subject to state requirements for verification of metrological equipment.

© 2019 Baker Hughes, a GE company – All rights reserved. DPS5000 Instruction Manual-English | 7
• Product (e.g. DPS 5000 Pressure Transducer)
• Pressure range
• Serial number
• Details of defect / work to be undertaken
• Calibration traceability requirements
• Operating conditions
3.7.1 Safety Precautions
To prevent possible injury when we receive the product, you must also tell us if the product
has been in contact with hazardous or toxic materials. Please supply the applicable Control of
Substances Hazardous to Health (COSHH) or Material Safety Data Sheet (MSDS) references
and precautions.
3.7.2 Important Notice
Service or calibration by unauthorized sources will affect the warranty and may not guarantee
further performance.
3.8 Electromagnetic Compatibility
The pressure transducer complies with the European Electromagnetic Compatibility Directive
2014/30/EU.
3.8.1 Power Supply and Metering
The quality of the power supply and monitoring equipment will directly affect the EMC
performance of the entire system. Since “Druck Limited” has no control over the installation of
the transducer it must remain the responsibility of the user to ensure that the EMC
performance of the system is adequate.
To maintain good immunity from electromagnetic disturbances present on the system power
supply, the power supply should filter any transient interference from the incoming line and
present a clean regulated DC supply to the transducer. The monitoring equipment should
likewise be immune from the effects of electromagnetic disturbances and not impart
disruptive signals on the connections to the transducer.
The transducer is not intended for connection to a DC distribution network.
3.8.2 Cable Type
Due to the small size of the transducer it is unlikely to be directly affected by radiated RF
energy. Any RF energy that gets into the circuit will probably enter via the interconnecting
cable.
To minimize the effect of nearby circuits and events, it is necessary to use screened cable
between the transducer and power supply / monitoring equipment. Failure to do so will
invalidate the EMC tests conducted by “Druck”.
The choice of cable type should reflect the environment through which it is going to run.
Screened cable should always be used where electrical noise is present. Good cabling practice
will be reflected in signal quality.

8 | DPS5000 Instruction Manual-English © 2019 Baker Hughes, a GE company – All rights reserved.
3.8.3 Earthing
For the screening of the cable to be effective, it is essential that the screen or drain conductor
is permanently bonded to earth (ground). This should take place at the monitoring end of the
cable as close to the power supply as practical. Protection should be afforded to any
unscreened section of cable or circuit by means of a screened enclosure. Take care not to
create ground loops.
4. Programming Guide
This section introduces the SDI-12 communication protocol and the DPS 5000 measurement
procedure.
4.1 SDI-12 Introduction
SDI-12 is a standard for interfacing data recorders with microprocessor-based transducers.
This section will discuss commands and how to use them.
4.1.1 Typical Measurement Sequence
SDI-12 data recorders and transducers communicate by an exchange of ASCII characters on
the data line. A typical data recorder/transducer measurement sequence proceeds as follows:
1. The data recorder wakes all transducers from low-power standby mode on the SDI-12
bus with a break. A break is continuous spacing (binary 0) on the data line for at least
12 ms.
2. The data recorder transmits a command to a specific transducer address, instructing
it to make a measurement.
Note: Other transducers on the SDI-12 bus ignore the command and return to low-
power standby mode.
3. The addressed transducer responds within 15 ms, with the following data:
i. The maximum time needed until the measurement data will be ready.
ii. The number of data values the transducer will return.
4. If the measurement is immediately available, the data recorder transmits a command
to the transducer instructing it to return the measurement(s). If the measurement is
not ready, the data recorder waits for the transducer to send a request to the recorder,
which indicates that the data is ready. The data recorder then transmits a command
to the transducer to retrieve the measurement data.
Note: When a data recorder tells a transducer to start its measurement procedure,
the data recorder does not communicate with any other transducer until the data
collection from the first transducer is complete.
5. The transducer responds, returning the measurement.

© 2019 Baker Hughes, a GE company – All rights reserved. DPS5000 Instruction Manual-English | 9
4.1.2 Baud Rate and Byte Frame Format
SDI-12 data recorders and transducers communicate by an exchange of ASCII characters on
the data line. See Table 5 for the SDI-12 byte frame format.
4.1.3 Allowable Data Characters
All characters transmitted on the SDI-12 bus must be printable ASCII characters from 32
decimal to 126 decimal, except for the following exceptions:
1. All responses from a SDI-12 transducer with a carriage return (0D hex, 13 decimal) and
a line feed (0A hex, 10 decimal) character.
2. In some cases the second and third character of a CRC code may not be printable ASCII
characters.
4.2 Transducer Address
The first character of every command is the transducer address. This lets the SDI-12 data
recorder verify that the response has come from the correct transducer. See Table 6 for
address codes.
4.3 Command Structure
Each command is an ASCII string with up to 5 characters, starting with the transducer address
and end by a “!” character.
Table 5: Baud Rate and Byte Frame Format
Parameter Value
Baud rate 1200
Start bits 1
Data bits 7, least significant bit transmitted first
Parity bit 1, even parity
Stop bits 1
Table 6: transducer Address
Address Description
ASCII Decimal
0 (zero) 48 Default address, all transducers are initially set to “0” (zero) by the
manufacturer for use in single transducer systems.
1 to 9 49 to 57 Addresses for additional transducers on the SDI-12 bus.
?63
When a “?” is used as the address character, a transducer will respond
irrespective of its own address. This addressing method should not be used if
more than one transducer is connected to the SDI-12 bus. If more than one
transducer is connected to the bus, they will all respond, causing a bus
contention.

10 | DPS5000 Instruction Manual-English © 2019 Baker Hughes, a GE company – All rights reserved.
4.4 Command Overview
All responses from the transducer end with a carriage return (0D hex, 13 decimal) and a line
feed (0A hex, 10 decimal) character.
4.4.1 Transducer Identification
To request the transducer identification, the data recorder transmits the transducer
identification command “aI!” to the addressed transducer. The transducer replies back with
the transducer identification. Example data transmission sequence below:
4.4.2 Transducer Measurement
To request a transducer measurement, the data recorder transmits the start measurement
command “aM!” to the addressed transducer. The transducer replies back when the
measurements will be ready and how many measurements it has taken. The data recorder
waits for the transducer to be ready and transmits the send data command “aD0!”. The
transducer replies back with the measurement data. Example data transmission sequence
below:
4.4.3 Average Filter Setup
This filter takes an average of a specified number of measurements taken over a specified
period. The pressure transducer can also report the statistical values of the measurement
samples during the measurement period. The filter setup requires the time between
measurements (SampleInterval) and the total number of measurements (SampleWindow) to
be averaged.
TX/RX Commanda
a. The first letter ‘a’ in the command is replaced by the transducer address, see Section 4.2.
Description
TX> aI! Transducer identification command.
RX> a13DruckLtdDPS5XE1.012345678 “13” is SDI-12 protocol version 1.3.
“DruckLtd” is manufacturer’s name.
“DPS5XE” is model name, e.g. DPS 50xE or
DPS 5TxE.
“1.0” is transducer version, i.e. 1.0.
“12345678” is serial number. This may be a 7 or
8-digit number.
TX/RX Commanda
a. The first letter ‘a’ in the command is replaced by the transducer address, see Section 4.2.
Description
TX> aM! Start measurement command.
RX> a0013 3 values ready after 1 second.
TX> aD0! Send data command.
RX> a<value1><value2><value3> <value1> is compensated pressure.
<value2> is compensated temperature.
<value3> is density compensated level.

© 2019 Baker Hughes, a GE company – All rights reserved. DPS5000 Instruction Manual-English | 11
Note: The average filter register table settings can only be modified when the pressure
transducer is in customization mode. See the “aXMW” command in Section 4.5.2.
The example below shows a typical average filter setup and the communication sequence
with the pressure transducer.
SampleWindow = 10 (total samples)
SampleInterval = 60 (seconds)
Note: The product of SampleWindow x SampleInterval must be less than 999.
Reset the pressure transducer to exit the customization mode. The pressure transducer now
powers-up with the above average filter setup. Below shows the start measurement
communication sequence with the pressure transducer with the average filter setup.
TX/RX Commanda
a. The first letter ‘a’ in the command is replaced by the transducer address, see Section 4.2.
Description
TX> aXMW1<password>! Enter into customization mode.
RX> a Acknowledgment from pressure transducer.
TX> aXSW710! Set SampleWindow to 10.
RX> a10 Acknowledgment from pressure transducer.
TX> aXSW860! Set SampleInterval to 60.
RX> a60 Acknowledgment from pressure transducer.
TX> aXSF! Commits all values in the register table to the
power-on defaults.
RX> a Acknowledgment from pressure transducer.
TX/RX CommandaDescription
TX> aM! Start measurement command.
RX> a6008 8 values ready after 600 seconds.
(10 x 60 = 600 seconds)
TX> aD0! Send data command.
RX> a<value1><value2><value3> <value1> is compensated pressure.
<value2> is compensated temperature.
<value3> is density compensated level.
TX> aD1! Send data command.
RX> a<value1><value2><value3> <value1> is mean pressure.
<value2> is pressure variance.
<value3> is pressure standard deviation.
TX> aD2! Send data command.
RX> a<value1><value2> <value1> is maximum pressure.
<value2> is minimum pressure.

12 | DPS5000 Instruction Manual-English © 2019 Baker Hughes, a GE company – All rights reserved.
Note: Setting SampleWindow to 1 turns off the average filter. The pressure transducer will
only reply with 3 readings, see example in Section 4.4.2.
4.4.4 Setting Liquid Density
The level measurement depends on knowing the density of the liquid it is in. The pressure
transducer AverageDensity register entry holds the average density of the liquid used in the
level measurement calculation. The default AverageDensity entry is 1.0 kg/m3, which is the
density of pure water.
Note: Temperature compensation of the level measure is only performed when
AverageDensity = 1.0. Changing AverageDensity to any other value results in the loss of
temperature compensation of the level measurement.
The example below shows how to change the average density to that typical of sea water.
Reset the pressure transducer to exit the customization mode. The pressure transducer now
powers-up with the above average density setup.
4.4.5 Setting Gain and Offset
The pressure and temperature measurements allow for additional gain and offset adjustment.
Note that changing these values does not effect the calibration data stored within the
pressure transducer. The gain and offset are applied with the following equation:
The following example shows gain and offset being applied to the pressure measurement:
a. The first letter ‘a’ in the command is replaced by the transducer address, see Section 4.2.
TX/RX Commanda
a. The first letter ‘a’ in the command is replaced by the transducer address, see Section 4.2.
Description
TX> aXMW1<password>! Enter into customization mode.
RX> a Acknowledgment from pressure transducer.
TX> aXSWA1.0236! Set AverageDensity to 1.0236. The value must be
positive and in the units of kg/m3.
RX> a1.0236 Acknowledgment from pressure transducer.
TX> aXSF! Commits all values in the register table to the
power-on defaults.
RX> a Acknowledgment from pressure transducer.
TX/RX CommandaDescription
TX> aXMW1<password>! Enter into customization mode.
RX> a Acknowledgment from pressure transducer.
TX> aXSW01.12! Set PressureGain to 1.12.
Output = Measurement GainOffset+