Checking Printing; With Printer Partially Connected; Print Test With Printer; Checking Ecg Signal - Innomed Medical Heart Screen 60G Service Manual

Innomed Medical
6.6

Checking printing

6.6.1 With printer partially connected

1. Connect a 4700uF capacitor in parallel with the power supply (9V max. current limit) substituting the battery.
2. Connect only the printer motor connection and load the paper. Connect a short on the ECG input.
Test procedure
Burn impulse test
Simultaneously with the burn impulse test check the following:
Measurement place
Interface Board J1.2
3. Stop supplying burn impulses. After approx. 3 seconds measure the burn voltage.
Measurement place
Interface Board J1.2

6.6.2 Print test with printer

Connect the burning head as well and start 50mm/sec on-line printing. Watch the signal shape, that the displayed
curves are continuous, there are no breaks, spikes, faded sections.
Further, measure the power consumption at the battery connection's negative point:
Measurement place
Main Board J4.2

6.6.3 Checking ECG signal

When measuring with the Phantom 320 simulator, first the generator amplitudes must be defined with analysis with a
certified device as a reference measurement. During the measurement series, compare to the reference.
At this point of the checks the analysis' QRS cycle's highest positive or negative wave's amplitude has to be checked,
as well as the T-wave amplitude, on all leads. The values measured by the device can deviate max. 5% compared to
the reference values.
6.7

Power consumption measurement

1. Connect the power supply set to +9V in place of the battery.
2. Connect the other power supply set to 3.6V, to the battery drain going to J4.1. Connect the negative points of the
two power supplies.
3. Connect the printer and load the paper.
Measure the following parameters:
•
Battery power consumption at J4.2 (negative pole!!). Monitor ECG signal on the display.
The measured current can be max. 300 mA with backlight on (360mA in case of turned-on SIO*).
•
When the device is turned off, measure the power consumption at J4.2 (negative pole!!). The measured
current can be max. 100RA.
•
Charge feedback check: Monitor ECG signal on the display, while measuring charge current and battery
current. The Charge LED is lit on the keyboard.
•
With backlight on check the 5V power supply conformance (5V +/- 0.1V measured at J11.1).
2014.01.09
Heart Screen 60G-80G-L
Comment
Start from the test menu (HS80G-L) or with the REC button (HS60G).
Max. 5ms burn time, measure at J1.1 on the Interface Board (active signal at high
level).
Nominal value Tolerance
7.2V +/-0.1V
Nominal value Tolerance
7.2V +/-0.1V
Nominal value
1-2.5 A fluctuating
Comment
HEADPOWER
Comment
HEADPOWER
Comment
Current from the battery.
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Service manual