Marquette Hellige GmbH
MicroSmart V 2.xx
Page 54
Servicing Instructions 227 470 35 B - 97.12
The
heart rate
of 60 P/min +/- 2 P/min is shown in the display and printed on the recording.
Activate the function Square-Wave pulse with 1 mV on the ECG sensor.
Use the lead stepping keys to select Lead II. The square-wave pulse curve must correspond to
the 1 mV reference pulse in its
amplitude
(only valid for specified sensor). Return the ECG
sensor back to the ECG signal. Check if the HR control (configuration) is switched on.
Increase the heart rate on the ECG sensor to 200 P/min. The acoustic
signal
must sound. Reduce
the heart rate back to 60 P/min; the signal no longer sounds.
Checking the pacemaker detection
Select the following settings at the multifunction simulator:
- Pace setting
- Pace amplitude 6 mV
- Pace duration 0.2 ms
Select the "Man" mode at the equipment under test and select the lead group Einthoven (Eint) at
the equipment under test. Start recording. The pace pulses must be visible in the record as
spikes.
Checking the electrode drop-off detection
Set the simulator back to ECG signal with a heart rate of 60 P/min.
Remove one electrode after the other from the ECG sensor.
Select the "Auto" mode without activating it by pressing the Start key.
Check if each dropped off electrode is shown correctly on the display and if an acoustic warning
signal is given.
Checking the battery condition
The lead battery can be checked as follows:
Discharge the battery fully, then recharge fully (duration 6 h) and finally discharge in stand-by
operation without recording.
If the operating period is below 2.5 h, the battery should to be replaced.
