====== rEyKG LKD210 ======

This is transportable small EKG monitor originally used in ambulance cars.

=== Field operation manual ===

  - Prerun check:
    * Batteries: Displayed current should be more than 120 uA. If not, charge before use.
    * Amplifier set to zero
    * Open the display lid
  - Connect EKG cable to U1
  - Connect EKG cable to subject:
    * RED -> right hand
    * YELLOW -> left hand
    * BLACK -> right leg
    * GREEN -> left leg
  - Power ON:
    * 1st time it will not start
    * 2nd time it will boot up (wait few secs)
  - Measuring:
    * Select circuit (svod)
    * Wait for signal to stabilize
      - Press amplifier down to zero the signal
      - If running away, press again
    * Set speed
    * Set brightness to usable minimum
  - Power OFF:
    * Disconnect subject
    * Press power off
    * Close the lid

<note warning> Do NOT touch contrast and vertical shift </note>


=== Recharging ===

<note warning>
Recharge if displayed current is lower than 120 uA!

Do NOT use when recharging!
</note>

  - Screw out batteries (back panel)
  - Pull out charger + connectors
  - Charger LED:
    * Blue = fully charged
    * Red = charging
  - Power source - any 5V (build in microUSB connector)
  - Recharge BOTH batteries, ONE in a time
  - Screw charge + connectors back
  - Runtime ~6 hours

=== PC ===

  - Set brightness to minimum
  - Connect Arduino cable to C2 (SW same as [[project:medlab/ekg]])
  - BLACK wire is ground
  - Set signal amplifier to reasonable minimum

Script for gnuplot to display all circuits (svody) in one plot. Let the circuits be: 1.txt for I, 2.txt for II,... 6.txt for aVF.

When using WXT terminal, run it in persistent mode "gnuplot -p raykg.gnuplot"

<code>
#set terminal wxt size dynamic
#set terminal svg size 1060,1280 dynamic enhanced
#set output 'raykg.svg'
set terminal png size 1060,1280
set output 'raykag.png'

set key left outside
#set key vertical left

set mxtics
set mytics
set style line 12 lc rgb '#dddddd' lt 1 lw 1.5
set style line 13 lc rgb '#dddddd' lt 1 lw 0.5
set grid xtics mxtics ytics mytics back ls 12, ls 13
set ytics scale 1

unset xtics
set xtics format ""
set xtics scale 1

set xrange [100:1000]
set multiplot layout 6,1

set ylabel "I"
plot "./1.txt" every ::0 notitle "I" with line
unset ylabel
set ylabel "II"
plot "./2.txt" every ::4535 notitle "II" with line
unset ylabel
set ylabel "III"
plot "./3.txt" every ::78 notitle "III" with line
unset ylabel
set ylabel "aVL"
plot "./4.txt" every ::110 notitle "aVL" with line
unset ylabel
set ylabel "aVR"
plot "./5.txt" every ::0 notitle "aVR" with line

set format x '%0.f'
unset ylabel
set ylabel "aVF"
plot "./6.txt" every ::40 notitle "aVF" with line
unset multiplot
</code>


<note tip> Something went wrong? Contact [[user:ray]] for solution</note>