NorthEast Monitoring, Inc. NEMM019-Rev-O
Page 34 of 35
DR200/HE & DR300 Operator’s Manual
Appendices: Appendix E: Extraction of ECG data on 3-channel
Appendix E: Extraction of
ECG data on 3-channel
It is possible to retrieve the raw ECG files from the
Holter files. For all 3 channel data the process
results in three files, one for each channel. Each
file is then in the form of a binary file consisting of
16bit words (little endian) with each word repre-
senting one sample. The sampling is at 180 sam-
ples per second. The data is scaled so that the least
significant bit has a value of 12.5 uv. If a pace-
maker pulse was detected, the sample at the time
of detection will be replaced by the value 0x8000.
To generate these files, first analyze the data (actu-
ally the flash.dat) from the recorder using any
compatible version of the LX Analysis program.
At the completion of this there will be a file "data-
card.dat" in the patient directory. The full path is
by default:
c:\nm\pat\xx\datacard.dat
where xx is the number of the patient dataset.
This can be seen in the "No. and Directory"
columns of the "File->open/new" display.
Then, change the directory to c:\nm\bin and on a
single command line, run the following command
using the following 5 arguments:
unpackc d1 f1 f2 f3 0
•
where d1 is the path to the source datacard file,
for example,
d1= c:\nm\pat\xx\datacard.dat
•
f1, f2 and f3 are the resultant binary destina-
tion files, for example:
f1 = c:\nm\pat\xx\flashc0.dat
f2 = c:\nm\pat\xx\flashc1.dat
f3 = c:\nm\pat\xx\flashc2.dat
The result will be the three files in the patient
directory xx described previously. The files are
flashc0.dat flashc1.dat and flashc2.dat which are
for channel 1,2 and 3 respectively. If desired, the
destination paths for this command can be any
other path but spaces are not allowed in the path or
file name.
Appendix F: Accessories
NEMCA158 - 2-Lead Patient Cable,
Adult Small - 24”
NEMCA135 - 2-Lead Patient Cable,
Adult Medium - 30”
NEMCA145 - 3-Lead Patient Cable,
Adult Small - 24”
NEMCA146 - 3-Lead Patient Cable,
Adult Medium - 30”
NEMCA150 - 3-Lead Patient Cable,
Adult Large - 38”
NEMCA144 - 5-Lead Patient Cable,
Adult Small - 24”
NEMCA134 - 5-Lead Patient Cable,
Adult Medium - 30”
NEMCA149 - 5-Lead Patient Cable,
Adult Large - 38”
NEMCA133 - 7-Lead Patient Cable,
Adult Medium 30”
NEMH112 - Battery Door
NEMH116 - Belt Clip
NEMH187 - Recorder Pouch and Straps
NEMP00387 - Memory - SD Card