Welch Allyn CP 100 - 5 - Disassembly and Repair Procedures; Introduction; Screws; Torque Specs

42 Troubleshooting Welch Allyn CP 100 and CP 200 Electrocardiograph
Problem-Solving Suggestions
This section includes several tables:
• Lead quality problems (Ta ble 3)
• System failure problems (Ta ble 4, on page 43)
• System messages (Table 5, on page 44)
If you try these suggestions and still have problems, contact Technical Support. For phone
numbers, see “For information about any Welch Allyn product, please call Welch Allyn
Technical Support:” on page ii
Caution Replace parts, components, or accessories only with parts supplied or
approved by Welch Allyn. The use of any other parts can lead to inferior device
performance and will void the product warranty.
Table 3. Lead Quality Problems
Condition Causes Actions
A red dot is flashing on the Lead Off
screen. (CP 200)
A dot is flashing on the Lead Off screen.
(CP 100)
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.
• 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 “Base Line Filter” in the CP 200
Directions for Use Manual.
See “Adjust Baseline Filter” in the CP 100
Directions for Use Manual.
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” in the CP 200
Directions for Use Manual.
See “Adjust Muscle Filter” in the CP 100
Directions for Use Manual.
• If interference still persists, the problem is
probably electrical in nature. See the following
suggestions for reducing AC interference.