Greenspan ODO-1000L Operational manual

ODO-1000L SENSOR
DISSOLVED OXYGEN LOGGING SENSOR

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CONTENTS
1Introduction ................................................................................................................................................ 4
1.1 System Description ........................................................................................................................................ 4
1.2 Certification ................................................................................................................................................... 4
1.3 Unpacking and Inspection.............................................................................................................................. 5
1.4 Serial Number ................................................................................................................................................ 5
1.5 Warranty Policy ............................................................................................................................................. 5
1.6 Factory Service & Repair................................................................................................................................ 6
2Sensor Overview (by Parameter) ...................................................................................................................
2.1 Optical Dissolved Oxygen............................................................................................................................... 7
2.1.1 Principal of Operation............................................................................................................................... 7
2.1.2 Fluorescence Quenching........................................................................................................................... 7
3Applications................................................................................................................................................. 8
4Instrument Details....................................................................................................................................... 9
4.1.1 Sensor Design ........................................................................................................................................... 9
4.1.2 Cable Details ........................................................................................................................................... 10
4.1.3 Mechanical Specifications....................................................................................................................... 10
4.2 Options and Accessories .............................................................................................................................. 11
4.2.1 Communication Cables ........................................................................................................................... 11
4.2.2 Optional Serial Output – SDI Adapter Unit .............................................................................................12
4.3 On Board Battery Housing ........................................................................................................................... 13
4.3.1 Battery Replacement .............................................................................................................................. 13
4.3.2 Important Battery Information............................................................................................................... 14
4.3.3 Battery Warnings:................................................................................................................................... 14
4.4 Sensor Factory Calibration........................................................................................................................... 15
5Sensor Wiring & Connections......................................................................................................................16
5.1 Standard Connections.................................................................................................................................. 16
5.2 Wiring Diagrams .......................................................................................................................................... 17
6Serial Communication (RS232, RS422/485) .................................................................................................18
6.1 Waking sensor ............................................................................................................................................. 18
7Field Deployment Considerations ...............................................................................................................19
7.1 Cabling Considerations ................................................................................................................................ 19
7.2 Field Installation must ensure:..................................................................................................................... 20
8Maintenance ..............................................................................................................................................21
8.1 Optical Dissolved Oxygen............................................................................................................................. 21
9User Calibration and Testing.......................................................................................................................21
9.1 ODO ............................................................................................................................................................. 21
10 Modbus notes ............................................................................................................................................22
10.1 Holding Registers ......................................................................................................................................... 22
10.2 Show registers button.................................................................................................................................. 23
10.3 Codes and Terminology ............................................................................................................................... 24
10.4 Integer and Floating Point Values................................................................................................................ 24
10.5 32 Bit Values ................................................................................................................................................ 25
10.6 Floating Point............................................................................................................................................... 25
10.7 Updating Register Data................................................................................................................................ 25
10.8 Command Set – Modbus Function Codes....................................................................................................26

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10.9 Command Set – User Function Codes.......................................................................................................... 26
10.10 Exception Responses ................................................................................................................................... 26
11 Specification...............................................................................................................................................27
12 Contact Us ................................................................................................................................................288

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1Introduction
1.1 System Description
Thank you for purchasing a Greenspan ODO-1000L Sensor. This manual provides a guide to the
configuration, operation and maintenance of your sensor to provide long term reliable and accurate
monitoring.
The sensor includes an internal data logger to provide long term data collection at remote sites. A large
memory capacity (4 Mb) allows the ODO-1000L Sensor to store data over long periods before being
downloaded either locally or remotely by your preferred communications method.
Communication with the ODO-1000L Sensor is user selectable RS232 or RS422/485. Set up, data
collection and other user functions are simple to access using the supplied software package.
Additionally key sensor information and control is available via MODBUS. Sensors are also compatible
with the optional SDI-12 adapter.
The ODO-1000LSensor can be powered using external batteries (via the sensor cable) or with
Greenspan’s optional Lithium battery pack, which can be fitted as an extension to the sensor body,
making it a fully self-contained measurement and logging system.
1.2 Certification
The ODO-1000L sensors are assembled and tested in accordance with Greenspan’s ISO 9001 Quality
Certified System. Each Sensor is individually manufactured and certified against a traceable Standard.
Following calibration the sensors undergo a range of additional control processes to ensure that all
specifications are consistent and documented.
•The instrument is visually inspected, marked and labelled.
•The complete sensor calibration record is archived for reference, and batch number information
is kept on file for statistical analysis.
•An individual Certificate of Conformance is issued to the customer.

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1.3 Unpacking and Inspection
All Greenspan sensors are made to order and are individually calibrated and inspected. This ensures that
they leave the factory in a working condition. They are packed in new cartons for shipping. On receipt,
the customer should inspect the packaging and contents for any signs of damage during transportation.
The customer should also check that all items on the delivery note have been received.
Please contact the factory in case anything has been damaged or missing. A full set of documentation
including Certificate of Conformance, Quick Start Guide, and User Manual will be provided with all
equipment – either in hard copy format or in electronic format on the USB flash memory device shipped
with the goods.
The sensor is fitted with an Acetal body which provides superior corrosion protection in a wide range of
chemically active waters.
Because an individual sensor may be used in a variety of locations, media compatibility should be
checked before installing and advice sought from Greenspan if any doubt exists.
1.4 Serial Number
Checking the Model Number and Range
Before installing your Greenspan ODO-1000L sensor, check the information on the label is correct to
confirm you have received the instrument you have ordered. The label will look similar to this.
1.5 Warranty Policy
Greenspan warrants all new Greenspan products against defects in materials and workmanship for 12
months from the date of invoice.
Products that prove to be defective during the warranty period will be repaired or replaced at the
discretion of Greenspan.
Under Greenspan warranty conditions; it is the responsibility of the customer to cover shipping charges
back to the factory. Upon repair/replacement Greenspan will cover the return shipping charges to the
customer.
This warranty does not apply to products or parts thereof which have been altered or repaired outside
of the Greenspan factory or other authorised service centre; or products damaged by improper
installation or application, or subjected to misuse, abuse neglect or accident. This warranty also excludes
items such as reference electrodes and Dissolved Oxygen membranes that may degrade during normal
use.
Greenspan will not be liable for any incidental or consequential damage or expense incurred by the user
due to partial or incomplete inoperability of its products for any reason whatsoever or due to inaccurate
information generated by its products.

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All Warranty service will be completed as soon possible. If delays are unavoidable customers will be
contacted immediately.
Any sensor should not be dismantled unless under instruction from Greenspan Service staff. Incorrect
handling will void the warranty.
1.6 Factory Service & Repair
The correct choice of sensor and assistance with field installation can be provided by Greenspan and
their sales offices. A correct choice of equipment, together with technical advice and field experience
should result in long term success in the field. Greenspan Technical Services is dedicated to customer
support and provides assistance in the selection, installation, deployment and commissioning of sensors
with a full range of consulting services. All Greenspan products are designed, developed and
manufactured in Australia and can be supplied at short notice.
If for some reason sensors are required to be returned to our factory or your sales representative, please
note the model and serial number, describe the problem, including how and under what conditions the
instrument was being used at the time of malfunction. Clean the product and cable. Decontaminate
thoroughly if used in toxic or hazardous environment. Carefully pack product in original packaging if
possible & include a statement certifying product and cable have been decontaminated with supporting
information. Products returned for repair must be accompanied by a completed GRN (Goods Return
Notification) form. All sensors returned for service and repair work must be properly decontaminated
prior to return. A cleaning charge may be applied to sensors that require further decontamination.
Service work will not commence until the quotation has been accepted by the customer. A purchase
order for all repair and service work will be required before work is carried out.

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2Sensor Overview
2.1 Optical Dissolved Oxygen
The optical dissolved oxygen (ODO) sensor uses a robust, solid state,
fluorescence based transducer for field monitoring in a variety of
environments. Fluorescence based sensors are inherently reliable and
low maintenance, with no need for replaceable membranes or
electrolyte. No Oxygen is consumed during operation making the
sensor suitable for low flow applications. The sensor also responds
quickly to changes in Oxygen levels.
2.1.1 Principal of Operation
•The emitter sends light, at ~475 nm, to the back side of the sensing element.
•The wetted side of the sensing element consists of a thin layer of a hydrophobic sol- gel material.
A ruthenium complex is trapped in the solgel matrix, effectively immobilized and protected from water.
•The light from the LED excites the ruthenium complex immobilized in the sensing element.
•The excited ruthenium complex fluoresces, emitting energy at ~600 nm.
•If the excited ruthenium complex encounters an oxygen molecule, the excess energy is
transferred to the oxygen molecule in a non-radiative transfer, decreasing or quenching the
fluorescence signal (see Fluorescence Quenching below). The degree of quenching correlates to the
level of oxygen concentration in contact with the sensing element.
2.1.2 Fluorescence Quenching
Oxygen is able to efficiently quench the fluorescence and phosphorescence of certain luminophores.
This effect (first described by Kautsky in 1939) is called "dynamic fluorescence quenching." Collision of
an oxygen molecule with a fluorophore in its excited state leads to a non-radiative transfer of energy.
The degree of fluorescence quenching relates to the frequency of collisions, and therefore to the
concentration of the oxygen- containing media.

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3Applications
Applications in which the Greenspan ODO-1000L sensors can be used include:
•Monitoring of streams and rivers.
•Monitoring of water storage bodies including stratification studies.
•Intermediate and final effluent treatment monitoring.
•Hydrological run off studies.
•Ground and bore water analysis.
•Drinking water filtration efficiency.
•Industrial process monitoring.
•Sludge and dredge monitoring.

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Power and
Data Cable
Acetal Body
Double O’ Ring connections
Moulded Cable entry
Optical DO transducer
4Instrument Details
4.1.1 Sensor Design
The Greenspan ODO-1000L Sensor consists of the following primary elements:
•Microprocessor controlled signal conditioning and logging device
•Stainless steel or Acetal Body Material
•Senor Head Shroud (removable for cleaning)
•Data cable or Battery Pack option
ODO-1000L Primary Elements

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4.1.2 Cable Details
All Greenspan sensors utilise a specially designed Polyurethane Cable. The cable is reinforced with
Aramid fibres which provide superior tensile strength and low stretch properties. Changes in
temperature have little effect on the overall length of the cable.This feature provides users with the
benefit of self-suspending the sensor to depths of 300m without additional strain relief.
The cable contains 12 x conductors, 1 x drain wire, an internal vent tube and Aramid fibres. The outer
jacket is made from UV stabilized Polyurethane and is suitable for all external, underwater or harsh
environment applications. This common cable construction is utilized for vented and non-vented
Greenspan sensors. Cables are generally factory fitted at time of manufacture in specified lengths.
4.1.3 Mechanical Specifications
•Specially manufactured Greenspan cable with 12 cores and internal vent
•High chemical resilience and abrasive resistance
•Conductor cross section : AWG 24,
•Electrical Resistance 9 ohm per 100m (per conductor)
•Operating temperature: 85°C (max.),
•Bending radius (static) : 6 ,
•Bending radius (dynamic) 12.
•Max Operating voltage : 250V
•Jacket Printing (white colour each meter)
•Conductor colour codes : green, yellow, white, black, brown, turquoise, violet, pink, red,
blue, grey
The moulded cable is fitted to the sensor using a double o ring seal and located using 2 x grub screws.
The length of the cable is not critical to the long term calibration and operation of the sensor (provided
the electrical requirements such as minimum supply voltage are maintained).
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Cable Construction
1 –Vent Tube: Polyamide
(size ID x OD) 2.40 x 3.20 mm
2 – Aramid Fibre
3 - 12 x Conductors
7 x 0.20 mm Tinned Copper
Section = 0.22mm2 AWG24
Insulation: Polypropylene
(size) = 1.10 mm ± 0.05 mm
4 - Tape: Polyester
5 – Drain Wire: 7x0.20 TinCu
6- Tape: Polyester Aluminium
7 - Jacket: Polyurethane black,
(size OD) 8.05 mm ± 0.15
7
6
5
4
2
3
1

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4.2 Options and Accessories
4.2.1 Communication Cables
A communication cable is required to connect the sensor to a PC.
•5CC-840: The standard cable has a 7 socket Hirschman connector on one end and a USB on
the other end. For connection to PC and laptops via USB port.
•5CC-700: Has a 7 socket Hirschman connector on one end and DB9 on the other end. For
connection to PC and laptops via serial ports.
•5CC-750: Has a 7 socket Hirschman connector on one end and bare wires on the other end.
For connection to TLC, dataloggers etc.
•5CC-102: Has a 9 pin Conxall to D connector for serial ports. To connect a sensor with
battery pack only to a PC or laptop via a serial port.

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4.2.2 Optional Serial Output – SDI Adapter Unit
The ODO-1000L Sensor provides on board data logging of all data and serial output via RS232 to a
Laptop or PC using the supplied SensorMate software.
A feature of the sensor is the ability to also provide serial output in SDI12 format using a small SDI
Adapter unit connected to the end of the sensor cable. The SDI12 Adapter unit (Part No 7SDI-1000)
provides a standard 3 wire SDI12 output for connection to a third party Data Logger or Process
Controller. The ODO-1000L Sensor can simultaneously provide on-board data logging, as well as act
as a standard SDI12 sensor.
When data is requested via SDI-12 the sensor will wake up and take a new set of readings for all
channels that are enabled in the sensor. The sensor will then go into a low power, sleep mode. The
user can enable or disable channels using SensorMate.
The easiest way to confirm which channels are enabled and what order the data will be returned via
SDI-12 is to view the SensorMate monitor screen. By default, the data returned via SDI-12 will be the
same channels and in the same order as what is displayed in the SensorMate monitor screen.
NOTE: Memory Used and Memory Used % is not returned via SDI-12.

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4.3 On Board Battery Housing
The ODO-1000L Sensor may be factory fitted with a non-rechargeable long-life battery pack. This
enables the sensor to be deployed at remote sites completely independent of above surface power
supplies (no cable connection) and allows for discreet applications.
It also functions as a backup power supply in the event of a surface disturbance to the main supply.
The unit is designed to allow easy access to the battery compartments for battery changeover and is
housed in a cylindrical body of approximately the same dimensions as the sensor housing, thus
doubling the length of the sensor.
4.3.1 Battery Replacement
Batteries are removed by unscrewing the housing cover, as indicated below and gently levering the
battery cells until they slip out. Replacement batteries must be inserted correctly or damage to
batteries may occur. Align the +ve on the battery cells with the red indicator on the housing and push
batteries in. Batteries are subject to leakage after depletion. The leakage is Thionyl Chloride, a toxic,
corrosive non-flammable liquid that can cause damage to equipment and personal injury if in contact
with the skin or eyes. Please replace batteries when depleted.
When installing replacement batteries within the battery housing it is necessary to push firmly on the
cover until it clicks home over the O rings, after this it can be easily tightened on the thread by hand.
Sensor with Battery Pack Cover Ready to Deploy
Battery Pack (Cover Removable)
Sensor
Batt Pack Cover
9 x AA lithium
Top View, showing 3 x 3
lithium AA batteries
Battery Pack Housing
+
+
+
+
Optional Battery Pack
Screw on Housing

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4.3.2 Important Battery Information
The type of battery used in the battery pack is Li/Mn02, Lithium Thionyl Chloride 3.6V AA cells. A total
of nine batteries are required for each sensor battery pack. This configuration supplies a maximum
10.8 volts at 5.2A/Hr and a useful field life, depending on sensor type and logging frequency, of up to
12 months.
Replacement batteries are available from Greenspan.
Note: Standard AA lithium batteries (Duracell or Energiser Type) are NOT suitable for use in the
sensor.
4.3.3 Battery Warnings:
•Do not dispose of batteries in fire, dispose of in appropriate manner.
•Do not short circuit
•Do not expose to water
•Do not crush or puncture
•Do not charge
•Do not over-discharge
To maintain the maximum possible life of the cells before replacement it is strongly recommended
that an external power supply is connected to the sensor when downloading data. The power drawn
when downloading is at its greatest level, therefore battery depletion will be much more rapid.
Battery life will depend on the battery type as well as the frequency of logging. Connection to a
computer will drain the battery supply more quickly due to the higher current imposed by the RS232
serial data communications and will considerably reduce battery life. An additional internal lithium
battery maintains logger data at all times but does not sustain the logging state. This battery is not
user accessible and will maintain data for up to 10 years.
If the sensor is fitted with on board internal battery pack option and is to be placed in storage it is
recommended that the logger be powered down and lithium batteries in the battery pack be removed.
To turn off the logger after exiting from SensorMate, disconnect the communications cable and
unscrew the battery cover. This exposes the battery compartment to allow removal of the batteries.
Removing power will not affect any data remaining in storage so sensors could be downloaded away
from the site if required.

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4.4 Sensor Factory Calibration
Optical DO Sensors:
•Sensors are calibrated in a stirred, aerated DI water bath for 100% saturated and an aqueous
Sodium Sulphate solution for zero.
All Sensors:
•An extensive range of final calibration and inspection tests, including tests in solutions of
known standards, are carried out on every sensor.
•The sensor is visually inspected and packed ready for despatch.
•The complete calibration records, sensor history and batch number are placed on file and
archived.
•The sensor is visually inspected and packed ready for despatch.

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5Sensor Wiring & Connections
5.1 Standard Connections
The ODO-1000L sensors are designed as a self-contained data logging sensor. It is normally powered
by a 12-24V DC power supply – which can be battery, solar or Mains Plug Pack.
The logger has a large memory capacity and can operate for long periods between field visits.
Typically the logged data is collected via laptop using the supplied SensorMate software.
The following diagram illustrates the typical wiring arrangement for the ODO-1000L Sensor.
The SensorMate software provides for configuration of the data logger, collection of logged data, and
all other functions. For further information, please refer to the SensorMate User Manual.
9-30VDC (+ ve Supply) red
Ground (-ve Supply) black
Shield (Gnd) green/yellow
PC or laptop running
SensorMate Software
5CC-840 USB Comms
Cable for HS7
Sensor cable with
ODO-1000L Sensor

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5.2 Wiring Diagrams
A Breakout Communication Cable (Part # 5CC-750) is available if a bare wire connection is more
suitable for an application. The Greenspan ODO-1000L Sensor CommsMode Utility contains wiring
information for the various modes of serial communication.

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6Serial Communication (RS232, RS422/485)
Communication to the ODO-1000L sensors is via a serial link. The user can select RS232 (default
setting) or RS422/485. The Greenspan ODO-1000L Sensor CommsMode Utility is a software tool that
provides a simple method for selecting communication modes, non-standard baud rates and
Modbus settings.
NOTE: SensorMate software uses the default settings.
NOTE: Full Duplex, where data is sent and received at the same time, is not supported.
6.1 Waking sensor
MP Sensors are designed to wake on receiving any commands on its communication lines. Although
it wakes quickly, it may miss the first few characters of a command. Most generic Modbus
communication programs will re-try if no valid response is received so this usually causes no problems.
All in house programs send a “Null” command to wake the sensor prior to any subsequent commands.
Communication circuits will switch to a low powered, listening mode (sleep) if there has been no
communication activity for 60 seconds.

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7Field Deployment Considerations
For applications in harsh environments it is recommended that the optional Acetal casing be specified.
The sensor head should be periodically inspected for fouling, and can be cleaned with fresh water and
damp cloth. In marine environments crustaceans may need removal at regular intervals.
The body should always be fully immersed under the water to ensure the electronic module is at water
temperature and to avoid any possible anodic/cathodic action taking place on the stainless body due
to the oxygen difference across the boundary.
It is recommended that Acetal body sensors be used if clamping.
Sensors should generally be installed such that they can be easily and safely removed for cleaning,
servicing. For environmental applications the sensor can often be mounted inside a section of PVC or
steel pipe which enters the water body. The sensor can then be slid down inside the pipe until the
sensor head just protrudes into the water body. This provides a high degree of protection for the
sensor from environmental (sunlight, heat, flood debris etc) as well as from other influences such as
Cattle, vandalism etc. Most sediment transport occurs during storm events and flood conditions.
Protection from floating debris damage is an important consideration along with adequate tethering
of sensors.
7.1 Cabling Considerations
Care should be taken with installation and field servicing to ensure the cable is not subjected to
persistent pulling snagging or severe compression. Cyclic loading of the cable should also be avoided
through careful sensor deployment. Additional stilling wells or mounting brackets may be required
to prevent sensor movement which may cause long term cable movement. Where cable runs are
required which may be subject to environmental effects (heat, water movement, sunlight, flood
debris etc.) it is advisable to protect the sensor cable inside a slightly larger diameter conduit such as
PVC, steel or polyethylene. This also allows the sensor cable to be pulled out – should a sensor
change-over be required at the site. Maximum cable runs up to several hundred meters are possible
without affecting electrical signals.

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7.2 Field Installation must ensure:
•The sensor is anchored or held in position or located so it is not subject to any movement
during normal operations.
•Sensor is protected from direct sunlight to avoid high temperature fluctuations
•Sensor is protected against high turbulence and possible debris loading during flow events.