Summary of Contents for Geosense NexusGEO
- Page 1 V1.1 May 2021 MULTI-SENSOR BLUETOOTH INTERFACE NexusGEO...
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Page 2: Table Of Contents
V1.1 May 2021 ITEM PAGE CONTENTS INTRODUCTION General description Theory of operation Software Host system requirements Electromagnetic compatibility Theory of operation CONFORMITY MARKINGS PACKAGING/HANDLING Inspection & storage GETTING STARTED Batteries Installing mobile app Permissions OPERATION Connecting sensors Using the app 6.2.1 Home and Bluetooth connection 6.2.2... -
Page 3: Introduction
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) •... -
Page 4: 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. -
Page 5: Theory Of Operation
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. -
Page 6: Electromagnetic Compatibility
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 •... -
Page 7: Markings
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. -
Page 8: Inspection/Storage
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. -
Page 9: Operation
V1.1 May 2021 6.0 OPERATION The unit compromises of: Red, Black, Green and White terminal sockets for analogue connections Bluetooth connection indicator Blue– Connected and taking readings • Red– Disconnected • Clear– No Bluetooth connection • Battery level indicator Green– Full battery level •... -
Page 10: Connecting Sensors
V1.1 May 2021 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. -
Page 11: Using The App
6.2 USING THE APPLICATION 6.2.1 HOME AND BLUETOOTH CONNECTION Turn on the NexusGEO device by holding the power switch for 1 second. The device will make a long audible beep and the battery light will display the current battery level for short period of time before going clear. - Page 12 To disconnect from the device, press the Bluetooth icon again. To turn off the NexusGEO, hold the power button down for 4 seconds. The device will make short audible beep before all lights will turn off.
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Page 13: Taking Readings
V1.1 May 2021 6.2.2 TAKING READINGS Pressing the Reading menu will show the following screen: - Reading Menu Items: Add Sensor • Select Sensor • Edit Sensor • Delete Sensor • Before readings are taken sensor information must be added, this includes sensor type and calibration factors... -
Page 14: Adding Sensors
6.2.3 ADD SENSOR Press ‘Add Sensor’ and the screen will change to: The NexusGEO supports a wide range of sensors types, and each one has different calibration factors that can be configured to convert to engineering units. Please refer to the following table to the select the appropriate sensor type. - Page 15 V1.1 May 2021 6.2.3 ADD SENSOR CONT. Sensor Type Calibration Factors Reading Units Engineering Units mV/V Displacement None mV/V None Meter mV/V Strain Gauge Linear (K) mV/V Load Cell NTC Temperature None Ohms °C Sensor PTC Temperature None Ohms °C Sensor Linear (M, C) Sin(X), Degrees, mm/M, Radi-...
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Page 16: Selecting Sensor
Select the sensor currently connected to the NexusGEO and hold down the ‘Hold To Take Reading’ button for 1 second. Note: Holding down the ‘Hold To Take Reading’ will give the user haptic feedback. This can be turned off in the app settings. -
Page 17: Site Zero Readings
V1.1 May 2021 6.2.4 SELECT SENSOR CONT. Whilst taking a reading it is not possible to change the selected sensor, or delete the selected sensor. To do this, stop taking readings. This screen may differ slightly based on sensor type selected. The controls are: - Readings –... - Page 18 V1.1 May 2021 6.2.5 SITE ZERO READINGS CONT. When converting raw readings into engineering units, a site zero reading can be set to make the calculation relative, rather than absolute. This button enables the user to set, customise and clear the site zero value. Any site zero value that is set, will be saved to the sensor and automatically applied whenever the sensor is being read again (unless removed).
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Page 19: Edit Sensor
V1.1 May 2021 6.2.7 EDIT SENSOR After a sensor has been added, the edit sensor button can be used to make changes to the sensor. Certain information cannot be changed such as reference name and serial number. 6.2.8 DELETE SENSOR Select the sensor to be deleted and press the delete button. -
Page 20: Data
V1.1 May 2021 6.3 DATA Any data that has been saved by the user when reading sensors is shown in this list (Most recent data at the top). Controls are: - Select All / Deselect All • FTP Upload • Email / Save to File •... -
Page 21: Email / Save To File
V1.1 May 2021 6.3.2 EMAIL / SAVE TO FILE Email and Save to file requires data storage permissions to generate the csv file that will be sent. Select which data are to be saved to file or send via email. Then press the ‘Email / Save to File’... -
Page 22: Maintainance
V1.1 May 2021 MAINTENANCE The maintenance for the NexusGEO is minimal for most applications but it should be kept as clean and dry as possible. However users should be aware that the unit contains a rechargeable NiCad battery. Therefore, if not used for long periods of time, the batteries may discharge. -
Page 23: Specifications
55mA @ NTC, 3K Ω load 60mA @ VW, 777.1Hz 15mA @ no Bluetooth connection Measurement resolution 24 bit, 0.1Hz for VW Display Android device & NexusGEO app Sensor connection Analogue (4mm socket), Digital RS-485 Temperature stability +15ppm/ºC maximum Operating Temperature -20 to +70°C... -
Page 24: Return Of Goods
11.4 Packaging and Carriage All used goods shipped to the factory must be sealed inside a clean plastic bag and packed ® in a suitable carton. If the original packaging is not available, Geosense should be ® contacted for advice. Geosense will not be responsible for damage resulting from inadequate returns packaging or contamination under any circumstances. -
Page 25: Limited Warranty
Sufficient information has been provided to Geosense by the purchaser as regards the nature of its use to allow Geosense to confirm the applicability of the NexusGEO. The NexusGEO shall be used in accordance with the manufacturer’s recommendations. - Page 26 V1.1 May 2021...
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