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Mantracourt Electronics Limited

T24-RA User Manual

10

Battery and Radio Levels Advanced Settings

LQI

value which stands for Link Quality Indicator. This value will range from 0 to 100 and within this band you

should still achieve communications. As the level drops towards zero communications may become intermittent
but still achievable.

RSSI

is effectively the received dB level which will range from about -30 which is a good signal to -90 which is a

weak signal.

CV

is the correlation value and indicates how well the signal can be decoded. This ranges from 55 which is a

poor quality signal and 110 which is an excellent signal.

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Summary of Contents for T24-RA

Page 1: ...T24 RA Potentiometer Acquisition Module User Manual mantracourt com ...

Page 2: ...l and Encryption 18 Save and Restore 19 Advanced Settings 20 Installation 21 Overview 21 Power Supply Battery 22 Considerations When Selecting Batteries 22 Battery Types 23 Power Supply Modules 23 Lithium Ion Polymer Module T24 BC1 23 Physical Connections 24 Specification 24 Suitable Batteries 24 Capacitor Module T24 BC2 25 Mounting 26 Antenna 27 Internal Chip Antenna 27 External Antenna Option 27...

Page 3: ...his section will show you how to get the device pair working out of the box You will require a 3 Volt dc supply for the acquisition module which may be 2 X AA alkaline batteries Power Attach power supply wiring to the module as shown below 3V Supply 0V Supply Connect to a 3 Volt power supply or batteries WARNING This module is not reverse polarity protected WARNING The maximum voltage is 3 6V Inpu...

Page 4: ...tallation T24 Toolkit To configure the devices we must use the T24 Toolkit software application This can be downloaded from our web site or may be shipped with your products Install this on a PC or laptop Run setup exe and follow the prompts to install the software T24 BSu Base Station If you have a USB version of the base station T24 BSu then you just need to plug this into a USB socket on your P...

Page 5: ... module is connected General Pages Setup Base Station Communications Select USB as the interface and select 1 as the Base Station Address In the toolkit all items that can be changed by the user are coloured orange To change a value just click on the relevant orange item You will then be presented with a new dialog window allowing you to change the value This may use a slider text box or list to a...

Page 6: ...removes the need to know the radio settings of the device you are connecting to and also ensures that it is in a suitable state for configuration Pairing Procedure Remove power from the acquisition module Click the Pair button on the toolkit You now have 10 seconds to re apply power to the acquisition module If you connect successfully the toolkit will change to the Information page If the pairing...

Page 7: ...or communications issues This page shows the radio signal levels detected across all the channels available to the T24 series of devices Using this tool may help in detecting noisy areas and allow you to decide on which channels you may want to use The above charts show the traffic from a Wi Fi network and it can be seen to be operating over channels 6 to 9 and it would be best though not essentia...

Page 8: ... be useful for checking that a device is operational NOTE When the toolkit connects to a device to enable configuration it will usually inhibit the transmission of Data Provider packets The Start Logging button will ask for a filename and proceed to log the received data to a CSV file in the following format Data Tag Elasped mS Value The View Last Log button will launch the application associated ...

Page 9: ...al 8 Information Once successfully paired to a device this page is displayed This page shows you information about the connected device Items you can change Name You can enter a short description which may help you recognise this device in the future ...

Page 10: ...nd within this band you should still achieve communications As the level drops towards zero communications may become intermittent but still achievable You can set the level at which the acquisition module reports a low battery If the battery voltage is below the Low Battery Level the bar will be coloured orange Items you can change Low Battery Level Click this item to set the battery low level Cl...

Page 11: ...ld still achieve communications As the level drops towards zero communications may become intermittent but still achievable RSSI is effectively the received dB level which will range from about 30 which is a good signal to 90 which is a weak signal CV is the correlation value and indicates how well the signal can be decoded This ranges from 55 which is a poor quality signal and 110 which is an exc...

Page 12: ...down to achieve longer battery life Sample Time This is the length of time in milliseconds that the input is sampled before the value is transmitted This can vary between 5 milliseconds and close to the Transmit Interval A shorter sample time means that the device is awake for less time so battery life is increased but at the expense of a reading with less noise free resolution You can vary this t...

Page 13: ...lculated from battery manufacturer s data sheets to take into account that we can only use batteries down to 2 1 Volts so in the case of twin AA cells this would be 1 05 Volts Generally the usable capacity will not be as high as that advertised by the battery manufacturer Temperature and internal resistance of the battery are not taken into account in the guide Sensor Impedance Ohms Although the I...

Page 14: ... later for By Cert and Advanced page where you can adjust individual gains and offsets Calibration Process Decide on how many points you will calibrate over Decide what inputs will be applied in ascending order at each point Enter the actual input in the required units that you want the module to read at each point Now proceed to apply each input in turn allowing a settle time and click the Acquir...

Page 15: ...in Click here to restart the calibration System Zero Once calibrated you may want to remove a fixed system value In the case of a strain gauge input this may be the weight of a sling shackle load bed etc Apply the required input and click here to set the system zero The current input will be removed from subsequent readings so that the reading will be zero To edit this value manually click the Adv...

Page 16: ...ration Points Enter the number of points you wish to calibrate over In its simplest form you could select two for a linear calibration For more complex calibrations which include linearization select three to nine points Input Points 1 9 shown in this screenshot Enter the input point for which you will specify a required engineering output value Engineering Units 1 9 Enter the required engineering...

Page 17: ...lude linearization select three to nine points Input Points 1 9 mV V shown in this screenshot Enter the input point to which the associated interpolated gain and offset values will be applied Note between points the gain and offset values are linearly interpolated Inputs are extrapolated below point 1 and above point 9 Gain 1 9 Enter the gain value for associated point Offset 1 9 Enter the Offset ...

Page 18: ...is dependent on what the user has selected starting from the bottom of the table When a point is found to which the input is less than then this point and the previous point are used to extrapolate a gain and offset from This leads to a resultant gain and offset which is applied to the mV V values as follows Value input Resultant Gain Resultant Offset ...

Page 19: ...e acquisition module will be configured to match the handheld NOTE Early acquisition module do not yet utilise the encryption keys so these should be left at all zeros Items you can change Channel Select a channel between 1 and 16 The default is channel 1 You can use the Spectrum Analyser mode to determine a good clean channel to use NOTE Channel 16 is used to negotiate pairing so avoid this chann...

Page 20: ... the configuration file to All configuration information including calibration data will be saved to the file The file extension is tcf Restore Click this button to open a file dialog window to allow you to select a filename and location of a previously saved file to load into the connected device All configuration information including calibration data will be overwritten The file extension is tc...

Page 21: ...heir ID 1 in 65 535 chances you may want to change the data Tag of one of the devices and perform pairing again with the T24 HS handheld Startup Time Some acquisition modules power a sensor from their excitation voltage When coupled to a sensor with a slow startup time this setting is used to delay the measurement after wakeup from sleep between readings This gives the sensor time to settle at the...

Page 22: ...rials for product enclosures preference should be given to fibreglass light coloured ABS or Polypropylene at the wavelength of 2 4GHz radio other materials will adversely affect the signal by attenuation refraction or change in polarisation If the application demands that the radio is fitted inside a metal enclosure then ensure that the specified clearances are maintained around the antenna and de...

Page 23: ...ed operating range when considering a particular battery technology Self discharge Batteries are chemical devices and have a shelf life which needs to be considered in application where long battery life is required Typically an Alkaline has a battery life of 5 years Internal Resistance of battery Low internal resistance is important the higher the resistance the less useful life of the battery is...

Page 24: ...sable capacity Lithium Primary 3 6V Li SOCl2 Lithium cells can be used but note that the maximum voltage is 3 6 Volts Select a cell with low internal resistance Example Saft LS17500 A Saft LSH20 D Recommend T24 BC1 module as these cells usually have a high internal resistance Lithium Iron Disulphide Li FeS2 These can be found at 1 5 Volts and can therefore be a direct replacement for Alkaline cell...

Page 25: ...put voltage is applied Suitable Batteries VARTA LIP653450 Rated Capacity 1100mAh Dimensions 35 x 54 x 7 mm Weight 20g Charge Time 3 Hours 466mA Battery life 1 month 25 days VARTA LIC18650 Rated Capacity 2200mAh Dimensions 18 25 Diameter 65mm Height Weight 46g Charge Time 4 5 Hours 466mA Battery life 3 months 20 days UBC 581730 Rated Capacity 250mAh Dimensions 18 x 31 5 x 5 8 mm Weight 6 5g Charge ...

Page 26: ...rent acquisition modules such as a T24 PA using the T24 Toolkit or power cycling when the battery is near the end of its life In normal operation Low power mode with a handheld T24 HS where the T24 PA is connected to an uninterrupted battery this module is generally not required Using lower impedance strain gauges or multiple parallel strain gauges exacerbates this problem Consult Sales for detail...

Page 27: ... for mounting The one nearest the connection pads can accept an M2 screw or American equivalent 0 80 Important Note DO NOT USE 2 screw size Note that the mounting hole is connected directly to the Battery ground of the acquisition module The mounting hole near the chip antenna cannot accept metal mounting hardware The connection holes are on a 1 9mm pitch and are a diameter of 1mm ...

Page 28: ... 20 mm 20 mm External Antenna Option Use of a T24 external antenna requires a T24 acquisition module with a UFL connector stud in place of the on pcb antenna T24 acquisition modules fitted with a UFL stud have a suffix e to the part number e g T24 SAe Note The suffix e is omitted where the T24 acquisition module is fitted inside a T24 ACM or T24 ACMi enclosure e g T24 ACM SA T24 ACMi SA Internal A...

Page 29: ...m 20 mm The bulkhead mounting antenna can be used with metal or plastic housings Care must be taken when mounting the Antenna to ensure the installation does not become directional Antenna Orientation For the maximum range the acquisition module and any other modules should be orientated as shown The sensitivity to the radio transmission will be reduced if the acquisition module is oriented in a v...

Page 30: ...d in open field site at a height of 3 metres above ground T24 RA Specification at 3V supply at 25 C Measurement Min Typical Max Units Sensor Excitation Voltage 2 4 2 5 2 6 VDC Input Range 500 100 000 Ohms Accuracy 0 01 of Full Scale Electrical Min Typical Max Units Power Supply voltage 2 1 3 0 3 6 V DC Power Supply ripple 50 mV AC pk pk Power Supply current Min Typical Max Units Normal Mode 35 65 ...

Page 31: ...ttiva 1999 5 EC Nederlands Deze apparatuur voldoet aan de belangrijkste eisen en andere voorzieningen van richtlijn 1999 5 EC Norsk Dette utstyret er i samsvar med de grunnleggende krav og andre relevante bestemmelser i EU directiv 1999 5 EC Português Este equipamento satisfaz os requisitos essenciais e outras provisões da Directiva 1999 5 EC Suomalainen Tämä laite täyttää direktiivin 1999 5 EY ol...

Page 32: ... the equipment In order to fulfil the certification requirements the OEM must comply with FCC regulations 1 The system integrator must ensure that the text on the external label provided with this device is placed on the outside of the final product 2 The acquisition modules with external antennas may be used only with Approved Antennas that have been tested by mantracourt IC Labelling requirement...

Page 33: ...ollowing form If the CE marking is reduced or enlarged the proportions given in the above graduated drawing must be respected The CE marking must have a height of at least 5mm except where this is not possible on account of the nature of the apparatus The CE marking must be affixed visibly legibly and indelibly ...

Page 34: ...Range to which this declaration relates are in conformity with the appropriate standard EN 300 328 following the provisions of the Radio and Telecommunications Terminal Equipment Directive 1999 5 EC FCC CFR Title 47 part 15c BS EN 61000 4 2 and BS EN 61000 4 3 following the provisions of the EMC Directive 2004 108 EC and Low Voltage Directive 2006 95 EC December 2007 Brett James Development Manage...

Page 35: ...ing the problem If it is necessary to return the product to Mantracourt please include a note stating name company address phone number and a detailed description of the problem Also please indicate if it is a warranty repair The sender is responsible for shipping charges freight insurance and proper packaging to prevent breakage in transit Mantracourt warranty does not apply to defects resulting ...

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