Table 3 – Welch Allyn CP 100 12-Lead Resting Electrocardiograph - User Manual User Manual
Page 73
Directions for Use
Chapter 7 Troubleshooting
69
AC interference (even-peaked, regular
voltage superimposed on the waveforms).
May resemble or coincide with muscle-
tremor interference.
•
Electrodes that are dirty, corroded,
loose, or positioned on a bony area.
•
Insufficient or dried electrode gel.
•
Patient or technician touching an
electrode during recording.
•
Patient touching any metal parts of an
exam table or bed.
•
Broken lead wire, patient cable, or
power cord.
•
Electrical devices in the immediate
area, lighting, concealed wiring in
walls or floors.
•
Improperly grounded electrical outlet.
•
Incorrect AC filter frequency setting or
AC filter is turned off.
•
Check all electrode contacts and lead wires.
•
Verify that the patient is not touching any metal.
•
Verify that the AC power cable is not touching
the patient lead cable.
•
Verify that the proper AC filter is selected. See
•
If interference persists, unplug the
electrocardiograph from AC power and run it on
the battery. If this solves the problem, you’ll
know that the noise was introduced through the
power line.
•
If interference still persists, the noise may be
caused by other equipment in the room or by
poorly grounded power lines. Try moving to
another room.
Table 2. Lead Quality Problems
(Continued)
Condition
Causes
Actions
Table 3. System Failure Problems
Condition
Causes
Actions
Won't turn on when plugged into AC
power.
•
Faulty AC power connection.
•
Blown AC fuses.
•
No AC power.
•
Check the AC power source.
•
Check the AC fuses. See
Won't turn on when unplugged from AC
power.
•
Battery disconnected or incorrectly
connected.
•
Battery low, not charging, depleted, or
bad.
•
Blown battery fuse.
•
Check battery connections. See
•
Recharge the battery. See
•
Replace battery. See
•
Shuts down during printing
Battery low or bad.
•
Recharge the battery. See
•
Replace battery. See
Prints fewer than 10 reports on a full
battery charge.
Degraded battery.
Replace battery. See
Unresponsive for an extended time.
System frozen.
Press the reset button by inserting a small object,
such as a paper clip, into the hole.
The screen is too dark or too light.
The contrast is to high or too low.
Press Ctrl-R. The contrast resets to its default value.
Reset button