A-6 Cardiolab® II Plus Amplifier Manual 2002938-002E
Appendix A – Maintenance and Troubleshooting
Bicath type setting
No notch filter and identical high and low pass settings.
Make sure each signals is displayed on an active page.
All of the signals should be identical. If one channel does not produce
an identical signal, the channel may be bad.
Catheter Input Module Test
In the study configuration:
All channels should be set to Bicath type with equal filter settings.
Give each channel 2 poles in ascending order: Ch.1 (poles 1 and 2),
Ch. 2 (poles 3 and 4), Ch. 3 (poles 5 and 6), etc. Continue to do this
through all poles for all blocks.
Plug a simulated signal from channel to channel, from one pair of
poles to the next pair of poles. Connect the simulator ground to the
RL limb lead.
All of the signals should look the same, if one does not produce an
identical signal, the pole in the catheter input module may be bad.
Ensure that you are not placing the CIM in sterile bags and then
pushing the catheter pins through the plastic and into the CIM. This
plastic can become lodged in the CIM and create problems.
Catheters with long pins (1/2 inch) normally produce less noise than
catheters with short pins. This is due to the long pins’ deep
penetration into the CIM.
Send a fax of any noise issues to customer support. Use calipers to
demonstrate the cycle length of the noise. 60 Hz noise has a cycle
length of 16.7 ms.
Noise on ECG Signals
When inspecting a full 12 lead, is there one signal which is
particularly clean?
If Lead I is clean and all other signals are noisy, apply an new
left leg patch.
If Lead II is clean and all other signals are noisy, apply a new left
arm patch.
If Lean III is clean and all other signals are noisy, apply a new
right arm patch.
If all signals are noisy, apply a new right leg patch.
Buff and clean the patient’s skin before applying the new patch.
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