Hummingbird Paracube Sprint User manual

Paracube ®Sprint
Digital Paramagnetic Oxygen Sensor Module
Instruction Manual
Product Part Numbers: 00501/7XX series refer to table 7 for details.
Manual Part Number: 00501001A
Revision: 2
Language: UK English

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WARNINGS, CAUTIONS AND NOTES:
This publication includes WARNINGS, CAUTIONS and NOTES which provide,
where appropriate, information relating to the following:
WARNINGS: Hazards that may result in personal injury or death (coloured red).
CAUTIONS: Hazards that will result in equipment or property damage.
NOTES: Alerts the user to pertinent facts and conditions.
NOTE:
For safety reasons any sensor returned to Servomex must be accompanied by the
Decontamination Clearance Certificate contained in this manual. Unless the cell is
accompanied by this certificate, Servomex reserves the right to refuse to undertake
any examination of the product.
Apply appropriate anti-static handling procedures. Sensor returns must be packed in
the original packing material to prevent damage in transit.
WARNING - (USE):
As the final conditions of use are outside Servomex's control, it is the responsibility of
the equipment designer or manufacturer to ensure that the sensor is integrated in
accordance with any regional standards or regulations governing the final
application.
The sensor should not be relied upon as a single source of safety monitoring unless
expressly permitted within the regional standards or regulations governing the final
application.
NOTE:
The information in this document is subject to change without notice.
This document contains proprietary information which is protected by copyright. All
rights are reserved. No part of this document may be copied, reproduced or
translated to another language without the prior written consent of Servomex Group
Ltd.

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UK Legislation
Health and Safety at Work Act 1974
Control of Substances Hazardous to Health Regulations 2002 (as amended)
Ionising Regulations 1999
Important Notice
Servomex ensure that all products despatched to customers have been suitably purged and cleaned prior to
packaging, so that no hazards from the use of factory calibration gases or liquids will be present.
No item returned to Servomex or its representatives, for any reason whatsoever, will be accepted
unless accompanied by a copy of the following form fully completed and signed by a responsible
person. This is a requirement to comply with the above listed legislation and to ensure the safety of
the employees of Servomex and its representatives.
…………………………………………………………………………………………
Please tick one of the following sections as applicable to your equipment.
Decontamination Statement.
It is hereby certified that a suitable and sufficient decontamination process has been carried out and we have
taken reasonable action to ensure that the returned equipment described below will be free of potential toxic,
corrosive, irritant, flammable, radioactive or biological hazards and is safe to be handled, unpacked, examined
and worked upon by Servomex employees and its representatives.
Please give detail of decontamination process used:-_________________________ ____
________________________________________________________________________
Decontamination Clearance Certificate.
It is hereby certified that the equipment described below has never been exposed to any potential toxic,
corrosive, irritant, flammable, radioactive or biological hazards, therefore it is reasonably expected that it
should be safe for Servomex employees and its representatives to handle, unpack, examine and work upon
the equipment described below.
Equipment _______________ ______ Reason for return ______ ______________
________________________ _____ ___________________________ _______
______________ _____________ _______
Serial no __________________ ____ ___________________________ _______
__________________ _________ _______
_____________________ _______ ______
Company ______________ _ ____ _______
________________________ ___ _______
Signature _________________ _____
Print name _____________________ Company seal or stamp:-
Position ___________________ ____
Date __________________________
Form: 5000/2 issue2

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1:INTRODUCTION........................................................................................................................................6
2:SERVOMEX PARAMAGNETIC MEASUREMENT PRINCIPLE.......................................................7
3:PRODUCT SPECIFICATION....................................................................................................................9
3.1PERFORMANCE SPECIFICATION (UNDER CONSTANT CONDITIONS)..............................................................9
3.2 MECHANICAL SPECIFICATION..............................................................................................................11
3.3 EXTERNAL POWER SUPPLY SPECIFICATION.........................................................................................11
3.4 ENVIRONMENTAL SPECIFICATION .......................................................................................................12
4:SENSOR INTEGRATION........................................................................................................................14
4.1SENSOR MOUNTING..................................................................................................................................14
4.2ELECTRICAL ARRANGEMENT ...................................................................................................................17
4.3COMMUNICATION AND OUTPUT ...............................................................................................................19
4.4LOCATION OF SENSOR..............................................................................................................................20
4.5HOW TO MINIMISE EXPOSURE OF PNEUMATIC SYSTEM TO CONTAMINANTS............................................20
4.6HOW TO HANDLE THE SENSOR.................................................................................................................20
4.7ORIENTATION OF SENSOR.........................................................................................................................21
4.8CONDITIONING OF THE SAMPLE................................................................................................................21
4.9PRESSURE EFFECTS: .................................................................................................................................22
4.10USE OF SENSOR WITH FLAMMABLE /TOXIC SAMPLE GASES:..............................................................23
4.11SAMPLE GAS CONNECTION:................................................................................................................23
5:OPERATION AND CALIBRATION.......................................................................................................25
5.1CALIBRATION –INITIAL CONDITIONS.......................................................................................................25
5.2TWO POINT FULL CALIBRATION...............................................................................................................26
5.3SINGLE POINT OFFSET CORRECTION (SPOC)...........................................................................................27
5.4ZERO DRIFT OFFSET CORRECTION IN THE HOST EQUIPMENT...................................................................28
5.5RESTORE FACTORY CALIBRATION ...........................................................................................................28
5.6LED SENSOR STATUS ...............................................................................................................................29
5.7FORMAT OF THE SENSOR OUTPUT ............................................................................................................30
5.8STATUS FLAGS .........................................................................................................................................31
5.9SAMPLE OUTPUT SCENARIOS ...................................................................................................................32
5.10DIGITAL INTERFACE COMMANDS ........................................................................................................33
6:VARIANTS, SPARES, PACKAGING AND WARRANTY...................................................................35
6.1SENSOR VARIANTS OPTIONS –AS SHIPPED FROM SERVOMEX .................................................................35
6.2SPARES.....................................................................................................................................................36
6.3SPECIAL PACKAGING................................................................................................................................36
6.4PRODUCT FAILURE DURING WARRANTY..................................................................................................36
6.5PRODUCT FAILURE OUT OF WARRANTY ..................................................................................................36
6.6MAINTENANCE AND SERVICING ...............................................................................................................36
6.7DECONTAMINATION .................................................................................................................................37
6.8ROHS AND WEEE DIRECTIVES................................................................................................................37
7:APPENDICES ............................................................................................................................................38
APPENDIX 7.1OUTLINE DIMENSIONS,FACE SEAL WITH/WITHOUT GAS PORTS AS REQUIRED.......................38
APPENDIX 7.2OUTLINE DIMENSIONS,BRACKET MOUNT WITH BARBED GAS PORTS ....................................39
APPENDIX 7.3 MECHANICAL VIBRATION AND SHOCK RESISTANCE.............................................................40
APPENDIX 7.4SAMPLE GAS CROSS SENSITIVITY GUIDE..............................................................................41

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1: Introduction
The Paracube®Sprint represents the latest generation of Servomex’s paramagnetic
sensing technology. The sensor takes advantage of recent technological advances
allowing a performance only previously available from sensors of much greater size
and cost.
The sensor offers the OEM true flexibility in both mechanical and communication
interfaces incorporating Servomex’s world renowned paramagnetic technology
(described in section 2 of this manual) which has been designed into many OEM
products where reliability, long life and performance are major considerations.
Servomex’s non-depleting paramagnetic technology ensures consistent performance
over time with added cost-of-ownership benefits. The selectivity of the measurement
to oxygen means there is no interference from other respiratory gases. The sensor
provides a stable oxygen measurement, which is inherently linear requiring only two
reference gases to perform a full calibration. There is no requirement for a reference
gas during operation.
Note - No. 1
This Paracube® Sprint manual details the operation and
installation of the Digital variants only.
A full list of the digital variants for the Paracube® Sprint is
detailed in section 6.1. The manual detailing the Analogue
variants can be ordered under part number 00501009A.

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2: Servomex Paramagnetic Measurement Principle
The sensor utilises the paramagnetic susceptibility of oxygen, a physical property
which distinguishes oxygen from most other common gases.
The sensor incorporates two nitrogen-filled glass spheres mounted on a strong, noble
metal taut-band suspension. This assembly, termed the “Suspension Assembly” is
suspended in a symmetrical non-uniform magnetic field. When the surrounding gas
contains paramagnetic oxygen, the glass spheres are pushed further away from the
strongest part of the magnetic field. The strength of the torque acting on the
suspension is proportional to the oxygen content of the surrounding gases.
Fig.1
The measuring system is "null-balanced". The 'zero' position of the suspension
assembly, as measured in nitrogen, is sensed by a differential photo-sensor
assembly that receives light reflected from a mirror attached to the suspension
assembly. The output from the photo-sensor is processed and then fed back to a coil
wound around the suspension assembly to achieve a “Null Balanced” position. This
feedback achieves two objectives:
When oxygen is introduced to the cell, the torque acting upon the suspension
assembly is balanced by a restoring torque due to the feedback current in the coil.
The feedback current is directly proportional to the volume magnetic susceptibility of
the sample gas and hence, after calibration, to the partial pressure of oxygen in the
sample. A voltage output is derived which is proportional to the feedback current.
Taut Band
Permanent
Magnet
N2 filled
Spheres
Magnetic Field

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Fig.2
In addition, the electromagnetic feedback stabilises the suspension (heavily damping
oscillations) thus making it resilient to shock and vibration.
Rotation
Mirror
Light source
Photodiodes
Current measurement
Conductive wire
A
mplifier

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3: Product Specification
3.1 Performance Specification (under constant conditions)
This specification applies when the sensor has been calibrated using standard gas
values of N2and 100% O2 using the calibration procedure described in section 5.
Unless otherwise stated, the performance figures quoted are derived from two
standard deviation analysis. Where marked (†) testing has been conducted in
accordance with the requirements of IEC 61207-1 1994
Operating Range
0 to 100% O2 with over range capability -15% O2to +200% O2
Intrinsic Error†
<±0.2% O2
Linearity†
<±0.2% O2
Repeatability†
<±0.2% O2
Signal Noise (peak to peak)†
<0.2% O2
Zero Stability (permanent drift from calibration value) †
<±0.4% O2for first 24 hours
<±0.2% O2 for the subsequent week (additional)
<±0.2% O2per month thereafter (additional)
Temperature Coefficient
Zero: <±0.5% O2/ 10oC
Span: <±0.5% of O2reading / 10oC

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Response Time
Rise Time (t10 - t90)
Gas Exchange Sample Flow Rate Response Time
16% - 21%O2
50mL.min-1 1,150 ms
120mL.min-
1
395 ms
190mL.min-
1
230 ms
250mL.min-1 170 ms
21% - 100%O2
50mL.min-
1
1,300 ms
120mL.min-1 560 ms
190mL.min-
1
370 ms
250mL.min-1 280 ms
Fall Time (t10 - t90)
Gas Exchange Sample Flow Rate Response Time
21% - 16%O2
50mL.min-1 1,150 ms
120mL.min-1 395 ms
190mL.min-
1
210 ms
250mL.min-1 160 ms
100% - 21%O2
50mL.min-
1
1,300 ms
120mL.min-1 560 ms
190mL.min-
1
300 ms
250mL.min-1 190 ms
Flow Error
<±0.3% for 10ml/min change in flow rate within the operating flow range (50 to 250
ml/min)
Pressure Range
±33kPag (±5sig), operating
±66kPag (±10psig), proof
±100kPag (±15psig), failure
Tilt
<±0.5% O2equivalent for 15° change in orientation from the calibration point

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Time to Valid Reading
Time to valid output (from power up when within environmental spec) <6 seconds
Time to status output (from power up when outside environmental spec) < 6seconds
Pressure Compensation
<0.8% of reading for 20kPag (±3psig), change from calibration point.
3.2 Mechanical Specification
Dimensions (W X D X H)
The mechanical dimensions of all available sensor variants are detailed in appendix
7.1 and 7.2 of this document.
Weight
~70 grams (~2.47 ounces)
Pneumatic Leakage
3x10-4 mbar.L.sec-1 (~3x10-4 SCCS)
Operational flow rate
50 to 250 ml/min, Max purge at 300ml/min
Materials in Contact with Sample Gas
316 stainless steel
Borosilicate glass
Polyphenylene sulphide (PPS) with PTFE / glass filler
Platinum iridium alloy
Nickel
Fluorocarbon elastomer -FPM (Viton)
Krytox GPL205 grease
3.3 External Power Supply Specification
+5V dc ±5%, a supply supervisor inhibits operation when the PSU is below 4.75V.
Ripple and noise <0.1V Pk to Pk.
Current consumption: 5V supply rail = 70mA typical 100mA max.
A change of ±0.25V in supply Voltage results in a change of less than ±0.1% in
oxygen concentration.

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3.4 Environmental Specification
Sample Gas Condition
Dry, non-corrosive, non-flammable gas, free of entrained oil, less than 3 micron
particulates, non-condensing, dew point 10°C below the sensor operating
temperature.
Pressure Effect
The oxygen output will change in direct proportion to the barometric pressure unless
pressure compensation is enabled (see variant options, table 7).
Pressure compensation can be toggled via the serial command !Pn, where n = 0 or
1 for disabled or enabled respectively (see table 6).
Operating Temperature
5°C to 50°C (41°F to 122°F).
Storage Temperature (non-condensing conditions)
-30°C to +70°C (-22°F to 158°F).
Storage Pressure
10kPa – 200kPa (1.5psi - 30psi)
Thermal Time Constant
15 minutes. Time required for the O2signal to reach 66% of final reading when the
sensor has been subjected to a 20°C step change in ambient temperature.
Ambient Humidity
0 to 95% RH.
Altitude Range (operating)
-500m to +5000m (-1540ft to +15400ft)
Shock and Vibration
Meets the requirements of BS EN 60068-2-6:1996 (IEC 68-2-6),
BS EN 600-2-27:1993 (IEC 68-2-27) and IEC 68-2-34. Details of these requirements
are given in Appendix 7.3.
Soft magnetic material
A change in the reading of <0.1% O2will occur when a soft magnetic material is
brought within 10mm of the sensor body.

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Interference Effects
The paramagnetic effect of common background gases at 20oC, for 100%
concentration is shown below:
Interfering Gas Interference Effect (100% Interferent)
(%O
2)
N
2O -0.20
CO2-0.26
H
2O -0.03
Methane -0.16
CO 0.06
Helium 0.29
NO 42.56
NO25.00
A comprehensive list detailing the effect of other background gases is outlined in
appendix 7.4 or in Servomex Application Note HBAN PM25

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4: Sensor Integration
4.1 Sensor Mounting
The sensor can be mounted in one of two ways depending on the variant chosen. If
the gas interface is via barbed connectors refer to fig. 3, if the gas interface is via
OEM supplied or Servomex fitted piston seal gas ports refer to figs. 4 and 5
respectively.
The method of mounting the sensor shown in fig. 3 is via the factory fitted bracket.
The bracket houses 2 off M3 threaded brass inserts located on the underside as
shown and are used to secure the sensor onto a flat surface within the host
equipment. The inserts are pitched on 21mm centres, see appendix 7.2 for full
dimensional information.
The maximum insertion depth for fixing screws is 4mm. Screws inserted beyond this
depth will bottom out leaving the sensor poorly secured. Screws should be tightened
to a torque value of between 0.35 and 0.45 Nm.
Fig. 3 Sensor pre-fitted with mounting bracket
CAUTION - No. 1
When using fixing bracket to install the Paracube®
Sprint, it is important to note that the maximum
insertion depth for the fixing screws is 4.0mm.

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The sensor mounting method shown in figs. 4 and 5 is via the 4 off 3.2mm diameter
clearance holes located on the corners of the flanged moulding. The holes are on
24.7mm and 28.2mm centres.
Fixing is achieved using one of the following two methods;
1. 4 off M3 hexagon socket cap screws (or similar) sited from the sensor side
and screwing into M3 tapped in the host equipment.
2. 4 Off M3 screws from the host fixing to 4 off M3 nuts sited on the sensor side
of the flange.
Fig. 4 Flange mounted – gas connection via OEM supplied gas ports

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Fig. 5 Flange mounted – gas connection via Servomex supplied gas ports
CAUTION – No. 2
To ensure a gas tight seal for either of the flange type
mounting methods, tighten the fixing screws to a
torque value of 0.35 to 0.45 Nm.
CAUTION – No. 3
The four screws securing the outer most PCB are
factory fitted and should not be removed or used for
mounting purposes.
WARNING USE - No. 1
Failure to follow the recommended procedure for fixing
of the Sensor may result in leaks exposing personnel
to the sample gases.

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4.2 Electrical Arrangement
Power Supply (to be provided by the OEM)
The sensor requires an external power supply as specified in Section 3.3.
Electrical Connection
Connection to the sensor is made via a 4 way connector mounted onto the sensor’s
PCB. There are two connector types offered as standard, a Molex KK type friction
lock (fig. 5) or a low profile SMT connector (fig 6). See table 1 for pin out details. Full
details of the sensor variants are detailed in section 6.1.
All electrical connections to the sensor must be made using the correct style of
“Molex” connector, website www.molex.com
PCB Mounted KK Friction Lock Connector - Molex Part Number 0022272041,
fig. 5 2.54mm (.100") Pitch KK®Wire-to-Board Header, Vertical, with Friction Lock.
Mating crimp housing required by end-user Molex part number 0022012045 used in
conjunction with crimp terminal part number 0008500032.
Fig.5

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PCB Mounted SMT Connector - Molex Part Number 532610471, fig. 6
1.25mm (.049") Pitch PicoBlade™ Header, Surface Mount, Right Angle.
Mating crimp housing required by end-user Molex part number 0510210400 used in
conjunction with crimp terminal part number 0500798000.
Fig. 6
P1 P2 P3 P4
+5V Tx Rx Earth/Ground
Table 1
Earthing Arrangement
The sensor does not require an external earth connection. Electrostatic potentials are
discharged via the power supply 0V connection.
Electrical Separation
The electrical connections to the sensor should be kept to a minimum length. The
cable should be of a shielded 4-core construction; connect the electrical screen to the
equipment chassis earth star point.

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4.3 Communication and Output
UART Compatible communication
The communication is bi-directional UART compatible (non-return to zero) at 19200
baud. There is one dedicated transmit line and one dedicated receive line.
Sensor serial communications summary:
Non return to zero format (NRZ)
0 & 5 Volt signalling voltages
Full duplex
19200-baud transmission rate
8 data bits
1 start bit
1 stop bit
No parity
No handshaking
ASCII text format
Non addressable
Sensor outputs a reading every 10ms +/- 0.5ms.
Output with CRC
Addition of a Cyclic Redundancy Check (CRC) to the sensor output can be enabled /
disabled as required by the end-user.
Software within host equipment may use the CRC to detect errors in the
communication between the sensor and the host equipment allowing it to avoid using
corrupt measurement data.
Refer to table 6 “Digital Interface Commands” section 5.1 for the command to enable
or disable the CRC field. All sensors are shipped with the CRC output disabled.
The sensor retains the CRC setting over power-cycles.
Refer to table 5 “Sample Output Scenarios” section 5.9 for examples of the sensor
output format with and without the CRC field.
Details required to implement a suitable CRC verification algorithm are,
CRC Width 16 Bit
CRC Model XModem
Polynomial 0x11021 (Expression = x
16
+ x
12
+ x
5
+ 1)
Seed Value 0x0
Check Value 0x31c3 (over the string "123456789")

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4.4 Location of Sensor
The sensor body should be fixed rigidly to the OEM assembly and away from
vibrating components and in particular, care should be taken to avoid mounting the
sensor onto a chassis or plate that may act as a lever or spring. If the OEM
equipment is subjected to excessive mechanical shocks and vibration during use, it
may be necessary to mount the sensor on shock absorbers to dampen the impact on
the output of the sensor.
The sensor should be protected from sudden temperature variations, such as from
cooling fans, as this can affect both the zero and span calibrations. Fitting the sensor
into a temperature controlled environment will eliminate varying environmental
conditions and optimise its performance.
4.5 How to Minimise Exposure of Pneumatic System to Contaminants
Keep the components of the pneumatic system, whether in the laboratory or in the
production assembly area, away from the “dirty” operations, such as drilling,
packaging, filing, cutting, deburring and finishing.
Assemble components in a clean environment and ensure all the components in the
sample line tubing have been cleaned for oxygen service and are bagged
immediately after cleaning.
4.6 How to Handle the Sensor
Carefully remove the sensor body from the anti-static packaging. Only handle the
sensor using anti-static handling procedures.
Do not remove the self-adhesive dust cover until the Paracube®Sprint is ready to be
fitted in the host instrument.
The sensor should be fitted into the OEM equipment under clean conditions in order
to minimise the likelihood of contaminants entering the sensor or the OEM system.
CAUTION – No. 4
The sensor has exposed electronics which are at risk
from Electro-Static Discharge (ESD). Only handle the
sensor in a static safe environment.