Chapter14 Troubleshooting
14.1 Powering off Automatically
① Whether or not the battery capacity is nearly exhausted? Battery overdischarge protection
circuit is activated.
② Whether or not AC supply voltage is too high? Overvoltage protection circuit is activated.
③ Whether or not AC interference is too large or fixed knob in lead cable socket is tightened?
Overload protection circuit is activated.
14.2 AC Interference
① Whether or not the device is grounded reliably?
② Whether or not the electrodes or lead cables are connected correctly?
③ Whether or not the electrodes and skin are smeared enough electric gel?
④ Whether or not the metal bed is grounded reliably?
⑤ Whether or not the patient has touched the wall or metal parts of the bed?
⑥ Whether or not the patient has touched other people?
⑦ Whether or not there is high-power electric equipment working nearby? Such as X-ray
machine or ultrasonic device ,etc.
14.3 EMG Interference
① Whether or not the room is comfortable?
② Whether or not the patient is nervous?
③ Whether or not the bed space is narrow?
14.4 Baseline Drift
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