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c. "Noise" filter on
Apply 4 mVpp 35Hz sine signal from the generator between the device's V2 and all other connected inputs. The filter
is acceptable if the dampening is greater than 20dB. The measurement should be performed on the V2 lead by making
a recording at 50 mm/sec speed and normal amplification with the filter on. The recorded signal must be less than 27
mm.
8.3.8 Checking CMRR
a. Checked with 50Hz signal
Connect the patient cable to the M13 measurement device, to which input apply 20 Veff 50Hz sine signal.
Amplification *1. Start AUTO recording and check the signal size on the paper. Acceptable if the signal is not greater
than 5.6 mm.
b. Checked with 60Hz signal
Connect the patient cable to the M13 measurement device, to which input apply 20 Veff 50Hz sine signal.
Amplification *1. Start AUTO recording and check the signal size on the paper. Acceptable if the signal is not greater
than 5.6 mm.
8.3.9 Printing ECG signal
Set PACE MAL operating mode on the Phantom 320 generator and make approximately 10 seconds long printouts
from all groups at 25 mm/sec speed and *1 amplification. Check the printout quality. The curve must be continuous
and clearly visible.
The recording must be repeated in normal heart rate 60 position by connecting the pace generator, set to 700mV/2ms,
in series with the R lead.
Make 6 seconds long recording in automatic operating mode.
8.3.10 Checking PC connection
Connect an ECG signal generator to the device input. Monitor the signal on the PC and switch over all the
amplification levels, the filter, and all the leads. Check that the setting on the PC and the signal match those on the
device. Then start automatic storage on the PC, store the recording, then retrieve it from the database and check the
signal quality.
Check the R-wave amplitudes on all leads on the display. Print the signal from the PC on a laser printer through the
serial line and check the ECG signal there as well. Check the analysis parameters; compare the numeric values on the
display with the amplitude and time parameters from the recording.
8.3.11 Measuring power consumption
In different operating modes, with the voltages in the following table, measure the device power consumption
from the mains and the charging adapter.
Measurement place
253 Veff mains voltage
15 V from charger input
(in case of 253 Veff mains)
2014.01.09
Heart Screen 60G-80G-L
Device off, battery charging
max. current
0.1A
1.5A
37/84
Service manual
measured current
D-5450-1-B_HS60G80GL_SM_ENG.doc
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