Welch Allyn CP 200 12-Lead Resting Electrocardiograph - User Manual - Manual (Page 94)

90 Chapter 8 Troubleshooting Welch Allyn CP 200 Electrocardiograph
Problem-Solving Suggestions
This section includes several tables:
• Lead quality problems ( Table 2 on page 90)
• System failure problems ( Table 3 on page 91)
• System messages ( Table 4 on page 92)
If you try these suggestions and still have problems, contact Technical Support. For phone
numbers, see
page ii .
Table 2. Lead Quality Problems
Condition Causes Actions
A red dot is flashing on the Lead Status
screen.
OR
Lead-off information is displayed on the
screen.
OR
One or more leads prints as a square
wave:
• Electrode contact may be poor.
• A lead may be loose.
Note: Square waves may indicate that the
electrocardiograph is inoperative, but they
are more likely to indicate loose leads.
• Reattach the lead.
• Replace the electrode.
• Verify that the electrode area has been properly
prepared: shaved, cleaned with alcohol or
acetone, allowed to dry.
• Verify that electrodes have been properly stored
and handled.
Wandering baseline (an upward and
downward fluctuation of the waveforms): • Electrodes that are dirty, corroded,
loose, or positioned on a bony area.
• Insufficient or dried electrode gel.
• Oily skin or body lotions.
• Rising and falling of chest during rapid
or apprehensive breathing.
• Clean skin with alcohol or acetone.
• Reposition or replace electrodes.
• Help patient relax.
• If wandering baseline persists, turn the baseline
filter on. See
“Baseline Filter” on page 68.
Muscle tremor interference (random,
irregular voltage superimposed on the
waveforms). May resemble or coincide
with AC interference: • Patient is uncomfortable, tense,
nervous.
• Patient is cold and shivering.
• Exam bed is too narrow or short to
comfortably support arms and legs.
• Arm or leg electrode straps are too
tight.
• Help patient get comfortable.
• Check all electrode contacts.
• If interference persists, turn the muscle-tremor
filter on. See
“Muscle Filter” on page 68.
• If interference still persists, the problem is
probably electrical in nature. See the following
suggestions for reducing AC interference.