Geosense NexusGEO Bedienungsanleitung
V1.1 May 2021
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MULTI-SENSOR
BLUETOOTH INTERFACE
NexusGEO
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ITEM PAGE
CONTENTS 2
1.0 INTRODUCTION 3
1.1 General description 3
1.2 Theory of operation 4
1.3 Software 4
1.4 Host system requirements 4
1.5 Electromagnetic compatibility 4
1.6 Theory of operation 5
2.0 CONFORMITY 6
3.0 MARKINGS 7
4.0 PACKAGING/HANDLING 7
4.1 Inspection & storage 8
5.0 GETTING STARTED 8
5.1 Batteries 8
5.2 Installing mobile app 8
5.3 Permissions 8
6.0 OPERATION 9
6.1 Connecting sensors 10
6.2 Using the app 11
6.2.1 Home and Bluetooth connection 11
6.2.2 Taking readings 13
6.2.3 Adding sensors 14
6.2.4 Selecting sensor 16
6.2.5 Site zero readings 17
6.2.6 Save readings 18
6.2.7 Edit sensor 19
6.2.8 Delete sensor 19
6.3 Data 20
6.3.1 FTP data 20
6.3.2 Email / save to file 21
6.3.3 Delete 21
6.3.4 Settings 21
6.3.5 Exported csv files 21
7.0 MAINTAINANCE 22
8.0 TROUBLESHOOTING 22
9.0 SPARE PARTS 22
10.0 SPECIFICATIONS 23
11.0 RETURN OF GOODS 24
12.0 LIMITED WARRANTY 25
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It is VITAL that personnel responsible for the use of
the NexusGEO READ and UNDERSTAND the manual,
prior to working with the equipment.
1.1 General Description
The NexusGEO is a portable multi-sensor battery-powered Bluetooth interface, designed to
be used with any Android device with Bluetooth and android OS 8 or later* for wireless
gathering and storage of sensor readings.
It is provided with a battery charger and four individually coloured leads to connect to
analogue sensors and a terminal block for digital sensors.
The NexusGEO is to be used with a mobile application (app) which has an easy to use
interface and manages data acquisition from the following single sensor outputs:
• Vibrating wire (VW)
• 4-20mA
• Volt
• mV/V
• Pt100
• NTC
• Geosense Digital RS485
*Please note that due to ever changing android device specifications, these specifications are subject to change
1.0 INTRODUCTION
This manual is intended for all users of the Geosense® NexusGEO readout unit and
provides a guide for its operation and maintenance.
Analogue connections can be made directly to the terminals, using the
fly leads with crocodile clips supplied with the unit or with the green
terminal block on the bottom of the unit for RS-485
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1.2 Theory of Operation
The NexusGEO is a Bluetooth interface between a range of sensors and an Android
device. The raw signal output from the sensor is transferred from the NexusGEO to the
Android device via the NexusGEO app and the values displayed on the Android device
where they can be converted into Engineering units, stored on the device and transferred
via FTP or email.
1.3 Software
The NexusGEO mobile application (app) allows the user to configure the device with a wide
range of sensor types and download the data. It is available as a free download on the
Google Play Store.
As part of continual improvement, updates to the software may occur and should be
downloaded to ensure the current version is being used. Please visit the Google Play Store
to check for the latest version.
1.4 Host System Requirements
• Android device with Android OS Version 8 or higher (Minimum SDK Version 19) and
Bluetooth
• In order to use FTP functionality, a FTP server will be required.
1.5 EMC – Electro Magnetic Compatibility
EMC is the electromagnetic interaction of electrical and electronic equipment with other
electrical and electronic equipment. All electronic devices have the potential to emit and be
affected by electromagnetic fields. With the reduction in size of electrical components and
the ever increasing amount of electrical & electronic devices such as mobile phones, two-
way radios, safety control systems, signalling, generators, welding equipment, power cables
etc in all environments, especially construction sites, there is a huge potential for devices to
interfere with each other.
The NexusGEO has been designed and tested for EMC under the relevant CE marking
directives to ensure compliance and reliable operation
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1.6 Philosophy of Operation
Calibration Factors
The NexusGEO is designed to work with a wide-range of sensors. Most sensors will require
calibration factors to convert from the raw reading into an engineering unit. All Geosense
sensors are dispatched with a calibration sheet with any factors that may be needed. Digital
sensors have the calibration information embedded in the sensor. The NexusGEO app will
allow you to enter this information when you add the sensor.
Wireless Connection and Data Reading
The NexusGEO uses wireless Bluetooth technology to communicate between the Android
device and the app. Once paired on the phone, connection can be established at the push
of a button, and begin taking readings moments later. Live readings are saved temporarily
in a buffer that clears when readings are stopped being taken.
Linear and Polynomial Calculations
Most sensors make use of calibration factors and raw readings to convert to engineering
units using either Linear or Polynomial calculations. The equations are detailed on the
calibration sheets.
Site Zero Readings
Sensors that convert to engineering units using Linear or Polynomial calculations can use a
site zero reading and apply this to the result to make it relative. If you choose to not apply a
site zero reading, the result will be absolute (site zero defaults to zero).
Saving Readings
As readings accumulate in the buffer, you can choose to save the readings into a database.
Sensor information, raw readings and engineering conversions are all saved for reference
later.
Using the Data
Saved data in the app database can then be saved to csv and sent via an FTP, Email or
saved to the local phone device for future use
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2.0 CONFORMITY
Geosense Ltd
Nova House
Rougham Industrial Estate
Rougham, Bury St Edmunds
Suffolk , IP30 9ND
United Kingdom
Tel: +44 (0)1359 270457
www.geosense.co.uk
EC Declaration of Conformity
We Geosense Ltd at above address declare that the equipment detailed below, complies
with the requirements of the following EU Directives:-
• Low Voltage Directive 2014/35/EU
• Electromagnetic Compatibility Directive 2014/30/EU
• Waste electrical and electronic equipment (WEEE) 2012/19/EU
• Restriction on the use of certain Hazardous Substances (RoHS2) 2011/65/EU
Equipment description: NexusGEO
Make/Brand: Geosense
Model Numbers: NxG
Compliance has been assessed with reference to the following harmonised standard:
EN 61326-1:2006 Electrical equipment for measurement, control and laboratory use.
EMC requirements. General requirements.
A technical file for this equipment is retained at the above address.
Marn Clegg
Director
Rougham, June 2019
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3.0 MARKINGS
A GeosenseTM NexusGEO is labelled with the following information:-
Manufacturers telephone number & website address
Product group: NexusGEO
Product type: NxG
Input supply: 12V DC
Serial number: NxG-XXXX
CE mark
WEEE mark
4.0 PACKAGING/HANDLING
The NexusGEO comes in a robust carry case and packed for transportation to site.
Packaging is suitably robust to allow normal handling by transportation companies.
Inappropriate handling techniques may cause damage to the packaging and the enclosed
equipment. The packaging should be carefully inspected upon delivery and any damage
MUST be reported to both the transportation company and Geosense.
The NexusGEO is a precision measuring instrument and its associated equipment should
always be handled with care during transportation, storage and use.
Once the shipment has been inspected, it is recommended that the GeosenseTM
NexusGEO components always remains in the carry case for storage or transportation.
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4.1 INSPECTION/STORAGE
It is important to check all the equipment in the shipment as soon as possible after taking
delivery and well before installation is to be carried out. Check that all the components
detailed on the documents are included in the shipment. Check that the equipment has not
been physically damaged.
The NexusGEO contains electronics and batteries and whilst they are designed for outside
use and mounted within a waterproof (IP66) enclosure the internal circuit board can be
affected by excessive moisture, dust and temperature. When not in use they should be
stored in a cool, dry location.
5.0 GETTING STARTED
This section of the manual is intended for all users of the NexusGEO and is intended to
provide guidance with respect to its use in obtaining data from a sensor.
5.1 BATTERIES
The NexusGEO has internal re-chargeable batteries which are not replaceable in the field.
If there is a problem with the batteries and change is required please return the unit to
Geosense.
5.2 INSTALLING MOBILE APP
In order to work with an Android device the NexusGEO Mobile app will need to be
downloaded from the Google Play store.
5.3 PERMISSIONS
To enable full functionality of the app, access permissions will be required. To enable
permissions on your phone go to Settings -> Apps -> NexusGEO -> Permissions ->
Storage and toggle this on.
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6.0 OPERATION
The unit compromises of:
1. Red, Black, Green and White terminal sockets for analogue connections
2. Bluetooth connection indicator
• Blue– Connected and taking readings
• Red– Disconnected
• Clear– No Bluetooth connection
3. Battery level indicator
• Green– Full battery level
• Amber– Half battery level
• Red– Low battery, charge immediately
4. On/Off power button
• On– Hold for 1 second to power unit on
• Off– Hold for 4 seconds to power off the device
5. RS485 digital connector
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6.1 CONNECTING SENSORS
The NexusGEO can be wired in the follow ways using the terminals or crocodile clips
provided to read analogue sensors. Ensure that each wire is fully secured before any
readings are taken.
It can also be wired to read a Geosense RS-485 digital sensor using the green connector
block on the bottom of the unit. Ensure that each wire is fully secured using the screw
terminals to establish connection.
NOTE: For other RS-485 sensors please contact Geosense®
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