Comen CM300 - Page 24

Shenzhen Comen Medical Instruments co., ltd.
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50mm/s，error limit±2%.
5.2.2.2 Test method
a）Set the sensitivity of electrocardiograph as 10 mm/mv，print speed 25mm/s, AC filter 50Hz，
EMG filter off,low-pass filter 150Hz，drift filter 0.05Hz，manual model.Switch on the ST light of the
detector，press S+SU,keep the indicator of detector“3”lit，Change the output value 20μ V、10Hz
to 0.5mV、10Hz.
b）Enter a triangular-wave signal of frequency of 25Hz±1%、0.5mVp-p，set the print speed as
25mm/s ，after paper advanced 1s,measure by square master.
5 Groups continuous sequence（each group with 10 cycles）， the distance of each sequence on
the print paper is 10±0.5mm，the distance of 50 cycles on the print paper should be 50±2.5mm.
c）Set the print speed as 5mm/s,and set the signal frequency as 5Hz±1%，repeated test.
d）Set the print speed as10mm/s,and set the signal frequency as 10Hz±1%，repeated test.
e) Set the print speed as 12.5mm/s,and set the signal frequency as 12.5Hz±1%，repeated test.
f) Set the print speed as 50mm/s,turn off the AC filter,and set the signal frequency as 50Hz±1%，
repeated test.