Saadat Dena 640 User Manual page 37


HUM Filter: Press to toggle between 50 Hz, 60 Hz and Off. Select this filter with regard to your
local AC frequency. When 50 Hz and 60 Hz are selected, "H50" and "H60" will be displayed
respectively on the screen.

Periodic Recording: Press to set time interval in periodic recording. Available options are 5-60 min
and Off. If you select Off, periodic recording will be stopped.

Pace Detect: Available options are Off and On. Electrocardiograph system detects and rejects
pacemaker-generated signals from ECG signal if this option is set to Enable so that they will be
ignored in determining heart rate. If you select On for patients with pacemaker, detected pacemaker
signals will be marked on the ECG waveform as a white vertical line.

For patients with pacemaker, the PACE DETECT function
must be switched "ON", otherwise, the pacing impulse may be
counted as normal QRS complex.

Drift Filter: Press to switch On or Off. This filter is used to reduce signal oscillations.
If Drift filter is set On, "0.5" will be displayed on the screen and otherwise "0.05".
0.5 Hz filter is used to remove signal baseline oscillations and
may be affect on ST Segment analysis.

Periodic Interval Repetition: Press to set repetition of recording. Available options are 1-20 and
Infinite.

Measurement: when this option is Enabled, ECG parameters will be measured. Since the ECG
parameters measurement is done on Auto and Sync mode, by enabling this option, Rec Mode is
changed to "Sync in Auto" and "Auto 1+1" modes. When this option is Enabled, by pressing Start
key "Processing in 3s" message is clear on the display and after 3 seconds "Measuring" message is
displayed. Finally with filling the Measurement bar graph "
It‟s necessary to mention in Measurement processing, in the first, data collection is done in 10
seconds and then ECG parameters measurement is done in 4 seconds. While Rec mode changed to
the Manual or Rhythm mode, Measurement option will be changed to "Disable" and when
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", recording will be done.