Innomed Medical Hear Screen 112C-1, Service Manual

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Innomed Medical Heart Screen 112C-1 Service manual
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6 Device level measurements
6.1 HeartScreen112C-1 Basic functions
Test procedure Comment
Patient cable surveillance
(detecting break in the cable) Connect all the ten banana plugs of the patient cable together, connect the
cable to the device and switch it to monitoring mode.
On the display there must not be wrong lead detection, all the leads quality
indicators have to be green. During the test the device has to monitor zero
line on all leads.
Try to turn the cable at the critical points, close to the connectors, close to
the cable yoke and other places. The device must continue drawing zero
line. If there is noise on any lead or the lead fault indicator turns to red,
there is a cable break and you have to change the cable.
Power cord and mains
connection surveillance
Check the outer isolation of the mains cable each time when the device is in
the service station and/or periodically. If there is any demage, change the
cable.
Check the mains socket where the device is used. The wall socket has to be
a grounded type and in good condition. If the earth connection is failed, the
device can detect noisy ECG.
Power cord and charge test Switch on the device. After a few minutes connect it to the mains via the
power cable. After a few seconds, the yellow CHARGE lamp has to light.
Battery measurement
(detecting shorted cell, or too old
battery) Charge up the battery leaving the device on the mains for min. two hours.
Disassemble the battery package. Measure the voltage between the red (+)
and black(-) wires using the pins of the connector and pay attention not to
make short circuit, because the fuse in the battery can demage. The voltage
has to be 8 x 1.24V = 9,9V. If the voltage is lower than 9,2V in that case
the battery is too old, or there is a shorted cell inside. In this case change
the battery.