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PalmSens Sensit Wearable User Manual

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Development Kit
User Manual
Version 07-2024-001
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Summary of Contents for PalmSens Sensit Wearable

  • Page 1 Development Kit User Manual Version 07-2024-001...
  • Page 2 WARNING DO NOT CONNECT THE SENSIT WEARABLE TO A PC OR CHARGER VIA ITS USB C PORT WHILE A PHYSICAL CONNECTION OF ITS POGO PINS AND A HUMAN BODY IS PRESENT. A COMBINED MALFUNCTION OF THE PC OR CHARGER AND THE SENSIT WEARABLE MAY RESULT IN SERIOUS INJURY OR DEATH DUE TO ELECTROCUTION.
  • Page 3 PalmSens BV’s sole liability and responsibility for products under this warranty is for PalmSens BV to repair or replace any product that is returned to it by buyer or credit buyer’s account for such...
  • Page 4 The information in this manual has been carefully checked and is believed to be accurate as of the time of compiling. However, PalmSens BV assumes no responsibility for errors that might appear. See Appendix A for CE declaration of conformity.

  • Page 5: Table Of Contents

    Appendix A - EU Declaration of conformity ........22 Appendix B - EU Waste Electrical and Electronic Equipment (WEEE) directive ................... 23 Appendix C - Sensit Wearable for OEM ..........24 Appendix D - Mounting bracket technical drawings ......25...
  • Page 6 SEE FOR LATEST DOWNLOADS, APPLICATION NOTES, AND MORE INFORMATION: WWW.PALMSENS.COM SENWB...

  • Page 7: About The Sensit Wearable

    2 About the Sensit Wearable The Sensit Wearable is a wearable, lightweight, battery powered instrument for use with electrochemical (bio)sensors or electrochemical cells that are attached to the human body. The instrument is a low noise and low-current potentiostat and impedance analyzer which controls the potential applied to the sensor and measures the current response.

  • Page 8: Operating The Sensit Wearable

    3 Operating the Sensit Wearable 3.1 Features The Sensit Wearable has a single button and two LED indicators. The following image shows an overview. 1. Button for powering on and off, or for triggering. 2. Blue status indicator 3. Orange charge indicator 4.

  • Page 9: Mounting And Dismounting

    45 degrees counter clock-wise while gently pulling. 3.4 USB and charging The Sensit Wearable has a USB Type-C (USB-C) port and uses the High-Speed USB 2.0 specification. Charging of the Sensit Wearable can be done using the same USB-C port.

  • Page 10: Connecting

    Wearable either the USB-C cable can be used or a Bluetooth 5.0 connection can be established. 3.5.1 Connecting via USB-C Make sure the Sensit Wearable is switched on. If the appropriate drivers are installed, the PC will recognize the Sensit Wearable automatically when connecting via its USB-C port. The Sensit Wearable will appear in PSTrace as “Sensit Wearable”.
  • Page 11 Bluetooth MAC address. The Sensit Wearable can be added as a new Bluetooth Device in Windows in “Settings > Bluetooth & devices > Devices”. Before adding the Sensit Wearable as a Bluetooth Device in Windows, make sure to set “Bluetooth devices discovery”...
  • Page 12 A Bluetooth connection is always leading, so if a Bluetooth connection is present it will not be possible to connect via its USB-C port. Secondly a USB connection will be severed if a Bluetooth connection is made to the Sensit Wearable.

  • Page 13: Indicators

    3.6 Indicators Blue LED default states are: • Warning: blink 4 Hz • Idle: blink 1 Hz • Script running: solid on • Off or hibernating: solid off • In bootloader: blink 2 Hz Orange LED default states are: When the device is powered on and charging: •...

  • Page 14: Development Kit

    4.1 Development Board The Sensit Wearable Development Board allows for breaking out the pogo pins of the Sensit Wearable to a screw connector and Lemo connector. The Lemo connector is compatible with the cell cable supplied with the Development Kit. In combination with the crocodile clips, it allows for connecting to electrochemical sensors or cells in any form factor.

  • Page 15: Universal Adapter With Velcro Strap

    4.2 Universal adapter with velcro strap The supplied universal adapter with velcro strap allows for soldering on a small connector or wires to any kind of electrochemical sensor or cell. The SPE connector can be soldered directly onto the exposed pads, as shown here:...

  • Page 16: Pin-Out

    5 Pin-out The pogo pins at the bottom of the Sensit Wearable have the following functions: Function WE0: Main Working Electrode / WE1 WE1: Second Working Electrode / WE2 / Bipotentiostat Counter Electrode Reference Electrode AUX: Reserved (see next section)

  • Page 17: Auxiliary (Aux) Pin

    5.1 Auxiliary (AUX) pin The AUX pin is connected to an internal NTC temperature sensor by default. In case this pin is required to make a connection to an external signal the following specifications are valid for the pin: Input range: 0V - 2.8 V (16 bits) Resolution: 56 µV...

  • Page 18: Technical Specifications

    6 Technical specifications The Sensit Wearable has the following specifications: General • dc-potential range -1.2 V to +2 V • compliance voltage -2.0 V to +2.3 V • maximum current ±3 mA • max. data acquisition rate 1000 samples/s Potentiostat (controlled potential mode) •...

  • Page 19: Eis Accuracy Contour Plot

    Bipotentiostat • modes 1. WE2 at fixed potential (E offset vs RE1) 2. WE2 scanning (E offset vs WE1) • max. potential WE2 ∆E(WE1) + ∆E(WE2) < 1.6 V 6.1 EIS accuracy contour plot 11 pF 1 GΩ 80 pF 1 MΩ...

  • Page 20: First Measurement

    PSTrace 5. Make sure to use the latest version of PSTrace 5, that was supplied with the Development Kit. Step 1: Prepare the connections ƒ Mount the Sensit Wearable to the mounting bracket on the Development PCB. ƒ Connect the cell cable and the USB-C cable.
  • Page 21 PalmSens Dummy Cell Step 3: PSTrace ƒ Run PSTrace 5 ƒ Connect to the Sensit Wearable using the connection box in the upper left corner of the main window. ƒ Open the file “Sensit Dummy EIS.pssession” found in the folder “EIS examples”.
  • Page 22 “First EIS measurement on the Dummy Cell” ƒ For more information regarding the Sensit Wearable’s limitations with EIS measurements, please refer to the PSTrace Manual chapter 4, section: “Limitations for EIS on EmStat Pico” (The Sensit Wearable hardware functions similarly to an EmStat Pico.)

  • Page 23: Troubleshooting

    So, if a potential of 0.5 V is applied on a resistor of 10 k , the obtained current should be 0.5 V / 10 k = 50 µA. Contact PalmSens BV if the problems are persistent: info@palmsens.com Report the problems as detailed as possible. Please include photos...

  • Page 24: Maintenance And Compliance

    Sensit Wearable (except the battery) are rated to the industrial temperature standard of -40 °C to +85 °C. The battery of the Sensit Wearable is rated -20 °C to +60 °C when discharging 0 °C to +45 °C when charging.

  • Page 25: Humidity Compliance

    9.4 Temperature drift PalmSens instruments are calibrated at 21 °C. The most sensitive components of the instrument have temperature drift of 50 ppm. For instance at 1 °C or 41 °C, measurement drift of up to 0.1% may be experienced.

  • Page 26: Periodic Calibration And Preventive Maintenance

    9.7 Periodic calibration and preventive maintenance PalmSens instruments are designed in a way that eliminates the need for periodic calibration. While not mandatory, PalmSens does provide a calibration service for users with specific demands such as QC/ISO purposes. This service includes a new calibration certificate.

  • Page 27: Links And Tips

    ƒ Tera Term is an open source terminal for making a direct serial connection to the Sensit Wearable. This is useful for sending custom MethodSCRIPTs. See also section “MethodSCRIPT: Tips & Tricks” on our website.

  • Page 28: Appendix A - Eu Declaration Of Conformity

    Appendix A - EU Declaration of conformity Hereby, PalmSens BV declares that its Sensit Wearable is in conformity with the Radio Emissions Directive 2014/53/EU (RED) and applicable standards listed below: Health & Safety • EN 62479 • EN 61010-1 •...

  • Page 29: Appendix B - Eu Waste Electrical And Electronic Equipment (Weee) Directive

    Appendix B - EU Waste Electrical and Electronic Equipment (WEEE) directive Important Information for Correct Disposal of the Product in Accordance with the WEEE Directive This symbol on the product or its packaging indicates that this product shall not be treated as household waste. Instead, it should be taken to an applicable collection point for the recycling of electrical and electronic equipment.

  • Page 30: Appendix C - Sensit Wearable For Oem

    Appendix C - Sensit Wearable for OEM The Sensit Wearable circuit board is also available for OEM purposes. Contact us to discuss the possibilities. 6,03 4,02 0,4 30,25 0,90 0,1 VBAT Power button 6,03 4,02 0,4 2,74 30,25 0,90 0,1...

  • Page 31: Appendix D - Mounting Bracket Technical Drawings

    Mounting holes (TopView) DO NOT SCALE DRAWING REVIS UNLESS OTHERWISE SPECIFIED: DIMENSIONS ARE IN MILLIMETERS PalmSens BV TITLE: Sensit Wearable Mo Bracket DWG NO. SW - Mounting Bracket SCALE:2:1 SHEET 1 OF 2 2 mm diameter for the contact pads is the...
  • Page 32 Published by PalmSens BV Vleugelboot 22 3991 CL Houten The Netherlands © 2024 PalmSens BV FFC ID: XPYANNAB1 All rights reserved. 204-810005...

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