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Table of Contents
Summary of Contents for PARAGRAF MiST
- Page 1 MiST – Multi Sensor Test Unit Reference Manual Software Version 0.8.2...
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Page 2: Table Of Contents
12.2 Rear .........................15 12.3 Grounding of MiST ....................16 12.4 Input/Output Port ....................17 12.5 Probe Connection Ports ..................18 12.6 ESD Protection......................18 Connection Setup of the MiST ....................19 13.1 Initial connection.....................19 13.2 Disconnection......................19 13.3 Probe Connections ....................20 13.3.1 Rear Connections..................20 13.3.2 Complete Setup ...................21 13.4 Channel Status Indicator ..................22... - Page 3 15.1 Downloading the MiST Software Application............23 15.2 Installing the MiST Software Application..............23 15.3 Using MiST Software Application................24 15.3.1 Starting the software application..............24 15.3.2 Connecting to the MiST................25 15.3.3 MiST Config tab....................27 15.3.4 Spin Control tab ...................27 15.3.5 Channel Config tab ..................29 15.3.6 Graph Options tab ..................30...
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Page 4: Copyright And Disclaimer
This user manual provided is for general guidance only and does not expand or otherwise alter Paragraf’s warranties as set out in Terms of Sale, and no additional obligations or liabilities arise from Paragraf providing this user manual. Revision History REVISION NUMBER DATE OF FIRST RELEASE DETAILS V 1.1... -
Page 5: This Manual
The proper function of the product is subject to the following requirements having been met: The maintenance instructions specified in this manual are carried out and the MiST is maintained in good condition by the operator. Any maintenance issues must be reported to Paragraf Ltd. -
Page 6: Glossary Of Terms
CDC-ECM Communications Device Class – Ethernet Control Model Analogue-to-Digital Converter Digital-to-Analogue Converter Input / Output Comma-Separated Values Product Information Product information: PRODUCT NAME MODEL NUMBER VERSION NUMBER Multi Sensor Test Unit MiST V2.0 PC1-POSA-04-DOC-1776 V 1.1 © Paragraf Ltd 2023... -
Page 7: Intended Use
Intended Use The MiST is a data acquisition tool intended to be used to evaluate Paragraf’s GHS probes which are used to measure magnetic fields. Paragraf Ltd does not permit modification to the GHS probes or to the MiST itself. The equipment is intended to be operated in a dry, clean, ambient temperature working environment. -
Page 8: Specification
Input Input Voltage V AC +/10% Input Frequency 50-60 Input Current Output Output Voltage V DC Output Current Output Power Multi-Sensor Test Unit (MiST) Voltage Supply Input Voltage V DC Current GHS Inputs Common-mode Voltage VDC+ACpk Full-scale Voltage VDC+ACpk Bandwidth... -
Page 9: General Description
Graphene Hall effect Sensors (GHS) which are used for a wide range of industrial applications for measuring magnetic fields. The MiST is a compact, remotely controlled unit that powers and acquires data from up to four GHS probes, each providing connection to a GHS and temperature sensor. -
Page 10: Accessories And Peripherals
Height 1.23 Width Depth Tolerance +/-0.13 Flexi PCB Length Width Depth Assembly length Length 3050 Tolerance +/-5 For more information on how to order accessories for use with your MiST, please visit www.paragraf.com. PC1-POSA-04-DOC-1776 V 1.1 © Paragraf Ltd 2023... -
Page 11: Safety Information
Prohibition, Mandatory Action, and Warning Symbols CONTRAST COLOUR TO GEOMETRIC SHAPE MEANING SAFETY COLOUR THE SAFETY COLOUR Prohibition White Circle with diagonal bar Mandatory Action Blue White Circle Warning Yellow Black Equilateral triangle with radiused outer corners PC1-POSA-04-DOC-1776 V 1.1 © Paragraf Ltd 2023... -
Page 12: Safety Symbols
No access to persons with a cardiac device 10.2.4 Electrical Symbols SYMBOL MEANING SYMBOL MEANING Alternating current Direct current Earth (ground) terminal Equipment protected throughout by double This terminal is NOT a safety or insulation or reinforced insulation protective earth. PC1-POSA-04-DOC-1776 V 1.1 © Paragraf Ltd 2023... -
Page 13: Safety Information
CAUTION CAUTION: RISK OF HOT SURFACE TO USER. Do not cover or stack the MiST as the surface of the enclosure may get hot during continuous operation. CAUTION CAUTION: RISK OF INJURY TO USER. -
Page 14: Mist Block Diagram
The MiST provides four GHS probes connection ports which are used to provide the necessary power and measurement signals for the MiST to process the raw analogue data. The signals are acquired and passed through a SCMT circuit that suppresses the offset and low-frequency noise contributions from the GHS sensing element and its preamplifier which is dependent on the spinning frequency. - Page 15 NOTE: The MiST carries out a self-check to a known resistance every time the measurement is started. This ensures that the MiST is checked even if the probe is disconnected and connected again. An I/O port on the rear of the MiST provides an external +5 or +/-15 VDC for the user if required. CAUTION CAUTION: MAGNETIC FIELDS TO USERS.
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Page 16: Mist Connections
MiST Connections 12.1 Front Panel GHS PROBE CONNECTION MiST STATUS LED CHANNEL STATUS INDICATOR LEDs ON/OFF SWITCH 12.2 Rear NETWORK PORT GROUND CONNECTION POWER CONNECTOR I/O CONNECTOR PC1-POSA-04-DOC-1776 V 1.1 © Paragraf Ltd 2023... -
Page 17: Grounding Of Mist
12.3 Grounding of MiST Ensure the MiST grounding point on the rear of the unit is connected to the same Earth point as the Mains Power Supply Unit for correct measurement readings. GROUND POINT – REAR PANEL WARNING WARNING: RISK OF ELECTRIC SHOCK TO USER. -
Page 18: Input/Output Port
12.4 Input/Output Port The MiST provides 3 power supply rails for you to use with external equipment depending on your application. +/-15V power can be used to provide operational power supply rails to ensure external equipment is compatible with signal range of the MiST. +5V power can be used for digital power supply or low-power supply to external test equipment. -
Page 19: Probe Connection Ports
12.5 Probe Connection Ports The MiST provides 4 probe connection ports labelled Channel 1 – 4 using standard 9 way sub D Female connectors. Below is the pinout connection diagram detailing the functions of each pin. PIN DESIGNATOR SIGNAL DESCRIPTION... -
Page 20: Connection Setup Of The Mist
2. Connect a GHS Probe to the input connector and ensure that the connector screws are tightened to stop the connector falling out of the socket. 3. Connect one end of the ethernet cable to the rear panel socket on the MiST, and the other to your computer. -
Page 21: Probe Connections
13.3 Probe Connections Probe Probe Probe Probe 13.3.1 Rear Connections Power lead Ethernet lead Grounding lead PC1-POSA-04-DOC-1776 V 1.1 © Paragraf Ltd 2023... -
Page 22: Complete Setup
13.3.2 Complete Setup PC1-POSA-04-DOC-1776 V 1.1 © Paragraf Ltd 2023... -
Page 23: Channel Status Indicator
The MiST must be on the same DHCP network as the PC or directly connected to it. 14.1.1 DHCP-Enabled networks If the PC and MiST are connected to an existing network which has a DHCP server, the MiST and PC will obtain a unique IP(v4) address from the server. PC1-POSA-04-DOC-1776 V 1.1... -
Page 24: Direct Connections
14.1.2 Direct connections When the MiST is directly connected to the PC, the DHCP connection sequence will time out after 15 seconds (because there is no DHCP server available), at which point the MiST will adopt a link-local (automatically assigned) IP address of the form: 169.254.x.x... -
Page 25: Using Mist Software Application
Using MiST Software Application These instructions are written for application version 0.8.2. Later versions may look different. Note: this version of the software will only work for a single MiST connection at any given time. 15.3.1 Starting the software application Run the MiST Software Application by clicking the newly added MiST icon on your Windows desktop. -
Page 26: Connecting To The Mist
Turn the MiST unit on. 1. Once the status LED is solid blue, click the green box labelled “Connect MiSTs”. 2. If the MiST has been discovered, it will appear (selected) in the list of devices; click “Connect To Device”. - Page 27 The console window will show low-level information useful for debugging purposes (and to report to Paragraf in the event of an error): PC1-POSA-04-DOC-1776 V 1.1 © Paragraf Ltd 2023...
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Page 28: Mist Config Tab
This enables measuring signals from up to four GHS probes simultaneously. By default, Channel 1 is enabled, which assumes the presence of a GHS probe in Channel 1 of the MiST. Tick other boxes to monitor more (or different) probes. - Page 29 Non-Spinning Hall Offsets (Non-spinning mode only) This specifies the voltage offset (in millivolts) applied to each channel of the MiST in order to correct for measurement errors. (In spinning mode, this happens automatically as part of SCMT.) Note: The measurement frequency is fixed at 200 KHz in non-spinning mode, so a data rate of 25 KHz (as shown in the picture above) implies that eight sample measurements are used to compute each data point.
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Page 30: Channel Config Tab
This tab configures the settings for each enabled channel individually. Drive Current and Gain This specifies the drive (or bias) current supplied to the GHS probe and the gain used by the MiST to amplify the signal. Note: If the gain is too high for the signal being measured, i.e. if the resulting amplified signal is outside the range +/-4.096 V, a saturation error will be indicated by the MiST (red status and channel... -
Page 31: Graph Options Tab
The Graph Control panel (shown above) allows the graph to be paused, such that the display will not change as new data points are received from the MiST. When paused, the display can be altered to show past measurements (up to 1,000 seconds ago) or to zoom in and out along the x-axis (time), which can be useful at higher data rates (e.g., to see each individual measurement at 5 KHz). - Page 32 – A saturation error occurred previously (since Clear was last clicked) but not in the last 0.25 seconds Green – No saturation errors have occurred since Clear was last clicked Clicking Clear will immediately reset the LED to Green. PC1-POSA-04-DOC-1776 V 1.1 © Paragraf Ltd 2023...
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Page 33: Logging Tab
Press the green button to start logging. This will log all data points in raw byte form as received from the MiST for all enabled channels. The log files are binary (not text) and are named MiST_YYYY-M[M]- DD_HHMMSS (to show the current date and time) with file extension .pgb (for Paragraf binary file). - Page 34 The format of the values in the CSV file is dependent on whether spinning or non-spinning mode has been selected. Details are given below: Software export file format when spinning 2. Software export file format when non-spinning PC1-POSA-04-DOC-1776 V 1.1 © Paragraf Ltd 2023...
- Page 35 MiST. When replaying a log file, the graphs are permanently in “Pause” mode (because there is no new data coming from the MiST); therefore all settings on the Graph Options tab (see above) are available. PC1-POSA-04-DOC-1776 V 1.1...
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Page 36: Status Bar
Note: Settings will be saved in JSON format to a file called MiST settings.json in the directory C:\Users\[username]\MiST\settings. To avoid a build-up of past settings files in this directory, this file will be overwritten each time the settings are saved;... -
Page 37: Error Notifications
15.3.9 Error notifications Occasionally, the MiST encounters measurement errors during normal operation and reports these to the user via the controller application. Types of error The MiST identifies two different types of error: Saturation errors, where the voltage read is outside the range of acceptable values (namely +/-4.096V, including any magnification from the gain setting);... - Page 38 Processing errors, where the physical ADC components of the MiST encounter errors whilst reading a signal, or the MiST firmware is unable to process the measurements in time with the specified data-rate. When this happens, the graph for the channel in question will show the curve (trace) in red rather than the usual yellow colour.
- Page 39 PC1-POSA-04-DOC-1776 V 1.1 © Paragraf Ltd 2023...
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Page 40: Servicing And Maintenance
16.1 Cleaning the MiST The outer case of the MiST must be kept clean and free of dust. Use a soft cloth to clean the surfaces periodically. WARNING WARNING: RISK OF ELECTRIC SHOCK TO USER. -
Page 41: Compliance
Compliance 17.1 CE Declaration of Conformity PC1-POSA-04-DOC-1776 V 1.1 © Paragraf Ltd 2023... - Page 42 17.2 UKCA Declaration of Conformity PC1-POSA-04-DOC-1776 V 1.1 © Paragraf Ltd 2023...
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Page 43: Reach/Uk Reach Regulation
As such Paragraf has carried out an audit of the MiST to the latest list of Substance of Very High Concern (SVHC) and found that 2 components used in the circuitry are not REACH compliant. This is due to an increase in lead used in the high temperature solder pads of the components. -
Page 44: Contact Us
Contact Us Paragraf Ltd 7-8 West Newlands Somersham, Huntingdon Cambridgeshire PE28 3EB Company number: 09889431 +44 1223 739782 sales@paragraf.com, productsupport@paragraf.com www.paragraf.com PC1-POSA-04-DOC-1776 V 1.1 © Paragraf Ltd 2023...