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Service FAQ's

Usage FAQ's

System FAQ's:

Service FAQ's:

How can I obtain A-2000 Service Information?

A-2000 Service Information Manuals can be ordered through the Aspect Customer Service Department:

  • For XP systems, order part number 075-0014.
  • For standard systems, order part number 075-0013.

Also, A-2000 Operating Manuals are available: order part number 070-0015.

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What are the field-replaceable components of an A-2000 System?

The A-2000 system consists of three major replaceable components: the A-2000 monitor, the Digital Signal Converter (DSC), and the Patient Interface Cable (PIC).

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How do I calibrate the BIS monitor?

BIS Index is a calculated value, not a measurement; therefore the BIS monitor does not require calibration.

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Is there a simulator available for checkout purposes?

Yes. Sensor Simulators can be ordered through our Customer Service Department.

How do I perform preventive maintenance on the A-2000?

See Section 6 of the A-2000 Operating Manual, or order the A-2000 Service Information Manual from our Customer Service Department.

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How does your DSC exchange program work? Is it only available to warranty/contract customers?

Aspect's DSC Exchange program allows a DSC to be shipped to you immediately, and requires immediate return of your defective DSC. This program is available at no charge for warranty/service contract covered repairs. For systems out of warranty/contract, a flat rate service is available.

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My DSC cable is cut; is this covered in my warranty, and how do I get it repaired?

The repair of a cut cable is not covered by warranty. The Aspect warranty covers workmanship and materials, but does not cover external force damage. Warranty coverage for Aspect products is detailed in the operating manual.

For repair, use our excellent exchange program!  Aspect's DSC exchange program allows a DSC to be shipped to you immediately, and requires immediate return of your defective DSC.  For systems out of warranty/service contract, a flat rate service is available.

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My system is broken. Can I ship the whole system in for a replacement?

We request that you troubleshoot the system to determine which of the three major components needs service: the monitor, the DSC or the PIC/Sensor, then ship only the component that actually needs service. This saves unnecessary shipments and lost time. The Technical Support Department will be glad to help you troubleshoot the defective component.

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During factory service returns, is a loaner available?

In the U.S.A., loaner equipment is currently available to warranty or service contracted customers for covered repairs. This Aspect owned equipment can be at your site in two days (usually overnight). It is your responsibility to return the loaner when your repaired returned equipment arrives.

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I need a part number for a connector on the main Board inside the monitor. Can you supply me with part number information and part?

The A-2000 BIS Monitoring System is designed and manufactured using state of the art components and manufacturing processes. Field repair or customer repairs are therefore limited by design to replacement of major component assemblies such as the Patient Interface Cable (PIC), Digital Signal Converter (DSC), or the A-2000 Monitor itself.

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My PIC has failed. Is it under warranty?

PIC's are warranted for one year from date of purchase. The manufactured date is printed on the sleeve of the PIC cable.

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What is an "E" message or status message?

This is a text message that appears below the BIS and Signal Quality Regions on the screen of the A2000 during operation.

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Why do I need to record the "E" numbers of error messages for warranty repairs?

The "E" messages provide us with the information we need to repair your system in the most efficient way. Often the system can be repaired on site with minimal effort (for example by cleaning the connectors), avoiding the need to send the system back for repair.

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When using my sensor simulator, I see the E31 "Isoelectric EEG Detected" message. What does this mean?

Isoelectric EEG is a term describing the EEG waveform presented to the sensor. An Isoelectric EEG is flat line and the message indicates to the user that this EEG waveform is displaying this condition. When using a Sensor Simulator, this is a normal condition since there is no EEG generated by the Sensor Simulator.

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During regular use, I see E- message: "Isoelectric EEG Detected" E31. Why?

This message appears when no discernible EEG activity is detected for several minutes and the suppression ratio (SR) is equal to 100. First clinically evaluate the patient to assess if an isoelectric EEG is consistent with the patient state. If not, then check the leads for proper connection.

NOTE: Isoelectric EEG is a term describing the EEG waveform presented to the sensor. Isoelectric EEG is a flat line. When using a Sensor Simulator or when no patient is connected, this is normal since no EEG waveform is being generated.

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I see E- message: "DSC Not Connected" E01. Why?

Check that the cable from the DSC is connected to the front panel of the monitor. If connected, and the DSC doesn't work, the DSC or monitor may require service.

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I see E- message: "DSC Shut Down" E09. Why?

Too many fatal errors (overcurrent, voltage regulation) have occurred with this DSC and the monitor has stopped trying to get it to work. Turn the monitor off, then on and try again. If this problem persists, the DSC and/or monitor require service.

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I see E- message: "Re-prep Sensor" E13. Why?

The sensor has an impedance reading that is too high. Reprep the sensor by pressing each electrode location for 5 seconds. If this does not correct the message, check the cable connections and correct as necessary. If the message persists, check the impedance of the sensor. If none of these correct the message, replace the sensor.

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I see E- message: "Sensor Not Connected" E14. Why?

This message indicates that the Sensor or the Patient Interface Cable is not connected. Verify connections. If the message persists, the Patient Interface Cable or Sensor may be defective. Replace PIC or Sensor and evaluate. If problem persists, DSC may require service. Replace DSC.

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Usage FAQ's:

Should I leave the A-2000 monitor plugged into AC when powered down to maintain the backup battery?

This is not necessary. The A-2000 only charges the internal battery when it is plugged in AND powered ON.

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During use BIS was higher than expected. Why?

As with all patient monitoring parameters, the BIS Index should always be interpreted within the context of clinical events. Some clinical situations exist that may indicate the need to increase anesthetic agents. Also EMG and high frequency artifacts that may falsely elevate the BIS level may be present.

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System FAQ's

How can I capture BIS information and send it to my data recording system? … to my personal computer?

Real time data may be transferred from the A-2000 monitor using the serial port on the back panel. The A-2000 BIS Monitor has an RS 232 serial port that transmits ASCII text records every 5 seconds that contain the BIS value and other parameters derived from the EEG waveform information.

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