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MECG 2.0 Test System | User Manual

 

22 

7.3  Load ECG Source from File 

 

This  function  is  set  up  to  work with  popular  waveforms  from  the  PhysioNet 
website  and  other  databases.  As  the  software  can  work  directly  with  the 
website, the user does not need any knowledge about the PhysioNet site, file 
formats and the like. However, note that there are many formats and options 
available.  The  current  MECG  works  with  Format  16  and  Format  212  with 
common options.  
 

Table 3: Load ECG Source from File

 

 

Use these buttons if the ECG files are 
already on your PC.  
 
For PhysioNet files, select the *.hea file 
of interest. The *.dat file should be in the 
same directory. 

 

Use this section to automatically 
download from the internet.  
 
The downloaded file(s) will be stored in 
“C:\Physionet”. 
 
If the file has already been downloaded 
before, the software will use the PC 
version.  

 

The import message log provides 
feedback on what the software is doing 
with the file. As many PhysioNet files 
exceed ±5mV (due to noise, drift or large 
physiological signals) and lead mapping 
is not always clear, the user should 
check these messages.  

 

As there are many labels used for 
waveforms in the PhysioNet website, the 
MECG software will make a “best guess” 
which output lead the waveform should be 
mapped to. However, the user can adjust 
these provided that selected leads are 
exclusive.  

Содержание MECG 2.0

Страница 1: ...MECG 2 0 Test System User Manual 0 WHALETEQ Multichannel ECG Test System MECG 2 0 User Manual Revision 2022 05 22 PC Software Version 2 0 10 6 ...

Страница 2: ...ument and the programs as is without warranty of any kind either expressed or implied including but not limited to the implied warranties of merchantability or fitness for a particular purpose This document could contain technical inaccuracies or typographical errors Changes are periodically made to the information herein these changes will be incorporated in future revisions of this document Whal...

Страница 3: ...Firmware 11 3 5 Manually Update Firmware DAC Compensation File 12 3 5 1 How to Update Firmware 13 3 5 2 How to Update DAC Compensation File 14 4 Software Development Kit SDK 15 5 Calibration and Validation 15 5 1 Self Calibration 16 6 Standalone Behavior 19 7 Software Operation 20 7 1 Main screen 20 7 2 CTS CSE Database 21 7 3 Load ECG Source from File 22 7 3 1 WhaleTeq Format 23 7 3 2 EDF Format ...

Страница 4: ...MECG 2 0 Test System User Manual 2 11 Version Information 30 12 Contact WhaleTeq 30 ...

Страница 5: ... List of Table Table 1 Specifications 7 Table 2 CTS CSE Database 21 Table 3 Load ECG Source from File 22 Table 4 Supported Command Scripts 26 Table 5 Demo for Command Script 27 Table 6 Trouble Shooting 28 Table 7 Version Information 30 ...

Страница 6: ...ow 13 Figure 7 Confirm update Window 14 Figure 8 Firmware Updating 14 Figure 9 Firmware Update Completed 14 Figure 10 Self calibration settings 17 Figure 11 Connection to a multimeter 18 Figure 12 Measure the DC mV 18 Figure 13 Main screen 20 Figure 14 WhaleTeq Format 23 Figure 15 ECG File Load Window 23 Figure 16 License Activation Window 24 Figure 17 Display Parameters Output Waveforms 24 Figure...

Страница 7: ...a stable real time output with crystal oscillator accuracy and internal checks to ensure that no data is lost All waveforms are looped to the beginning when the end of the file is reached The system has embedded3 the CAL ANE and biological ECG waveforms from the CTS database referred to in IEC60601 2 25 2011 formerly IEC 60601 2 51 A custom design module has been developed to work with a large num...

Страница 8: ...io net website This allows the loading of files based on Format 16 or 212 format other formats may be considered on request Once the waveform is selected and the user presses the Play button the waveforms are streamed to the test unit The test unit converts these to 8 analog channels of data4 at signal levels 500 times higher than the final output e g for 1mVpp output the intermediate output is 50...

Страница 9: ...sing MECG 2 0 in 2020 serial number as ME2001 XXXXXX if the testing requires please refer to 3 5 2 How to Update DAC Compensation File to update the DAC compensation file 2 Hardware Specifications Table 1 Specifications Item Details Reference Value Output channels The 8 output channels are provided through a network as specified in IEC 60601 2 51 to provide signals to 10 lead electrodes in the dev...

Страница 10: ...luence the test A value a 5µV is suitable for this requirement Can be verified by monitoring the signal in the device under test using a diagnostic filter setting 5µV Time accuracy IEC 60601 2 51 does not provide any limits An inferred limit from the device under test An inferred limit of 1 is used see The system s design accuracy exceeds 0 1 as a 100ppm crystal reference is used 1 Sampling rate A...

Страница 11: ...enu 3 1 3 First Time Using WhaleTeq Product USB Driver Installation If Windows device manager can t recognize WhaleTeq product please follow the below instructions to Install Microchip USB driver Microsoft Windows 8 and Windows 8 1 Windows 8 and Windows 8 1 can t recognize MECG 2 0 please download mchpcdc inf from WhaleTeq website This driver is provided by Microchip for using with PIC microproces...

Страница 12: ...ile Then continue to follow the instructions to finish the installation There may be a warning that the driver is not recognized by Windows and this can be ignored 3 1 4 First Time using WhaleTeq Product Microsoft Net Framework 4 0 Installation WhaleTeq software is developed by Microsoft Net Framework 4 0 If MECG 2 0 PC software fails to execute properly please check whether Microsoft Net Framewor...

Страница 13: ...ise reduction A noise free environment is necessary for testing ECG equipment This can be achieved relatively easily by using a metal bench or metal sheet underneath the ECG device under test the WhaleTeq MECG test unit and also connecting together the ground as shown With this setup turn the ECG device under test to maximum sensitivity turn off the ac filters if possible and confirm that the leve...

Страница 14: ...ly be supported with specific hardware and firmware If your device doesn t support this function please contact WhaleTeq service whaleteq com for more information Question How to check whether your MECG 2 0 supports firmware update or not Answer Connect the MECG 2 0 to a PC and go to the About dialog to check if F W Version and H W Version show Please see 3 5 1 How to Update Firmware step 1 to lea...

Страница 15: ...re here are the steps to update the device firmware Step 1 Click on the icon in the windows title bar to show the system menu and click the system menu About to show the About dialog Figure 5 About Button Step 2 Click the Update F W button and select the firmware image file Figure 6 Update F W Window Step 3 The application will show an information dialog After pressing OK the updating operation ca...

Страница 16: ...w to Update DAC Compensation File The DAC compensation data is stored in a file which is sent in the shipping notice email This avoids the need to re publish the MECG PC software with each serial number The file is named MECG_DACyynnnnn txt with yy as the year and nnnn as the sequential serial number as shown on the label at the button of the MECG equipment The file is approximately 220kB compensa...

Страница 17: ...ypically less than 10µV for any individual point This could affect for example the accuracy of measurements made in the ST segment For users applying tests with waveforms based on real biological recordings the recording itself contains noise well in excess of 10µV so that DAC compensation is irrelevant DAC compensation data will be kept by WhaleTeq so that any time if the data is lost e g transfe...

Страница 18: ...n Please contact WhaleTeq for obtaining the PC software with calibration mode which produces a slow 0 1Hz square wave with an amplitude as set on the display For example with 0 2mV setting the output will slowly cycle between 0 000mV and 0 200mV changing every 5s User shall confirm that the value is the same as set on the screen using a precision multimeter of accuracy equivalent to the Fluke 8845...

Страница 19: ...re set Square 0 1 Hz 5 mV and click Load then click Play as the figure below Figure 10 Self calibration settings 2 Connect a multimeter to the RA and LA jacks of the MECG 2 0 to measure the DC mV It should be in 1 of 5 mV as the figure below The MECG 2 0 output amplitude gives alternating 5s 0 1 Hz square wave phases at 2 5mV and 2 5mV so set the multimeter to zero delta function at one phase e g ...

Страница 20: ...A LA LL 3 5 0 5 5 3 8 33 mV as the figure below Then set the multimeter to zero delta function at one phase e g 4 17mV with reading taken from the other phase e g 4 16mV to obtain the 8 33 mV peak peak value Figure 12 Measure the DC mV 4 Repeat step 3 to connect the multimeter to the RA and V2 and then the V3 to V6 of the MECG 2 0 to measure the DC mV All the V2 to V6 should be in 1 of 8 33 mV ...

Страница 21: ...requency of 40Hz is suitable for this purpose The digital nature of the system is that only one point needs to be confirmed Equipment required Any suitable meter that can measure frequency with an uncertainty of 0 2 at 40Hz Method 1 Select Sine from the Other functions section 2 Set the amplitude 10mVpp 3 Set the frequency to 40Hz 4 Press the Load button 5 Press the Start button 6 Connect the freq...

Страница 22: ... waveform from Physionet or local PC 03 Display Parameters Set the parameters about screen display 04 Output Waveform Start and stop the waveform output 05 Other Waveforms Select other waveforms such as Sine triangle press Load to load them into memory and screen 06 Command Replay Use Command to auto display waveform 07 Graph View Graphs of the output waveforms for reference only 1 2 3 4 5 6 7 ...

Страница 23: ... 2 CTS CSE Database After selecting the desired waveform press the Load Waveform button to load it into the PC memory If noise waveforms are needed see IEC 60601 2 51 these can be optionally selected by checkbox Noise waveforms are added only to the outputs associated with Lead I and Lead II but through the network should appear on RA V1 V6 Noise waveforms do not appear on the display as they are ...

Страница 24: ... select the hea file of interest The dat file should be in the same directory Use this section to automatically download from the internet The downloaded file s will be stored in C Physionet If the file has already been downloaded before the software will use the PC version The import message log provides feedback on what the software is doing with the file As many PhysioNet files exceed 5mV due t...

Страница 25: ...II and V1 to V6 or the data file cannot be correctly loaded 7 3 2 EDF Format The MECG 2 0 software supports loading and playing EDF file format To enable this function you must purchase an additional authorization code After this function is enabled click EDF to load and play the EDF file and the PhysioNet Non Invasive Fetal ECG Database nifecgdb can be downloaded and played directly in the MECG 2...

Страница 26: ...Display Parameters Output Waveforms The output and display can be controlled as follows Figure 17 Display Parameters Output Waveforms These settings adjust only the display of the waveforms on the PC and do not have any impact on the output Selection of waveforms is limited to 12 all 12 leads 6 Leads I II III aVR aVL aVF 3 Leads I II III 1 Lead I only Note Leads III aVR aVL aVF are derived from Le...

Страница 27: ...allowing the user to quickly see the impact of the noise on the ECG under test 7 5 Other Waveforms Basic waveforms are selectable as below Figure 18 Other Waveforms The following other functions can be selected Sine wave adjustable amplitude and frequency Triangle wave adjustable amplitude and frequency 100ms pulse adjustable amplitude and frequency The user needs to press the load button to put t...

Страница 28: ...C 50HZ N10 Noise Noise pattern LoadLocal_Physionet Waveform file path Waveform file hea path on your local PC Load the Physionet waveform hea file on local PC LoadLocal_Ph ysionet D Whaleteq WhaleteqMECG 100 hea AcceptLeads LeadList The lead list for mapping number of the list should match loaded waveform Map the leads of the loaded Physionet waveform AccepetLeads I II None None None None V1 V2 V3...

Страница 29: ...result txt ProcessWait Executable PathArg The executable file path and arguments optional Invoke an executable to run Command replay would pause until the running process finished ProcessWait NotePad exe result txt Below is a demo for command script Table 5 Demo for Command Script Demo Explain CTS_CSE_Load PCTH009 CYC Load CSE009 waveform StartPlay Start to output the waveform Continue 144 Continu...

Страница 30: ... module 4 Wait for the recognition sound 5 Start WhaleTeq software USB streaming is interrupted occasional USB Module with firmware before Aug 2011 The system automatically detects streaming delays attempts to move the system to Off mode and provides the user with a warning To resume operation restart the function that was being previously used In some cases it may be necessary to restart software...

Страница 31: ...peripheral Previous versions of the MECG have incorporated a feature to detect interruptions stop streaming and inform the user Since August 2011 this feature has been modified so that the system simply records the time and duration of the streaming interruption In many cases the interruptions are rare and short 20ms and unlikely to influence the outcome of a test When a streaming error occurs PC ...

Страница 32: ...ware and Accessories MECG EDF file decoder USB feed regulator isolator WUI100 11 Version Information Table 7 Version Information Version Modify content Issue date 20201231 Add Chap 4 Software Development Kit SDK Chap 9 Caution Chap 10 Ordering Information Chap 11 Version information 20201231 20210628 Add Chap 9 Caution 20210628 20220522 Add 3 5 2 How to Update DAC Compensation File 5 1 Self Calibr...

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