User manual

User Manual for Multi-parameter Patient Monitor

Chapter 8 Troubleshooting

Note: In case of trouble of this machine in the service, follow the instructions below to eliminate the

problem first. If the attempt fails, refer to the dealer in your local area or the manufacturer. Do not open

the cabinet without permission.

8.1 No Display on the Screen

Shut down the machine and unplug the power. Use a universal meter to check if the outlet has proper voltage, if

the power cable is in good condition, and if the power cable is properly connected with this apparatus or outlet.

Remove the fuse from the back cover of this machine, and make sure it is in good condition.

8.2 Excessive ECG Signal Interference or Too Thick Baseline

1. Check if the plate electrodes are properly located, and if valid plate electrodes are used.

2. Check whether the lead wires are inserted properly. If no ECG curve is displayed, check if the ECG lead

wires are broken.

3. Make sure the mains outlet has standard grounding wire.

4. Check if the grounding wire of the apparatus is properly grounded.

8.3 Troubleshooting of CMS

 CSM does not turn on when power key is pressed?

Change to a new battery or fully recharged battery.

If changing the battery does not help, send the CSM for service.

 Blanked index- why?

Sensor impedance too high

If sensor impedance is >5k

Ω the CSI, BS AND EMG will be blanked.

Check that sensors are not dry.

Check that the skin has been cleaned properly.

Clean skin as described in chapter 3 and attach new sensors.



CSI rises along with EMG

High levels of facial muscular or electromyographic (EMG) activity can elevate the CSI under certain

circumstances. When this happens, attention must be paid to the stimuli received by the patient during surgery.

When the patient is asleep, EMG activity can increase due to reflex reactions to painful stimuli during surgery,

lack of muscular relaxation or muscular rigidity caused by some opioids (analgesics). In the presence of

hypnotically unrelated EMG, administration of a neuromuscular blocking agent may cause the CSI to

decrease.

Note: Facial muscles will recover sooner than skeletal muscles.

When these artifacts are present, the CSI should be interpreted with caution.