Drager Babytherm 8000 Service Manual

Dräger Medical, Inc.

Technical Service Bulletin # 4

Product: Babytherm 8000 WB / OC
Date: November 30, 1999
Re: Mattress Heating, noise on the ECG signal, new Power PCB
Reference Doc: IDM no. 5 / 01.98
Reason: 1.Introduction of new Power PCB with P/N 82 90 771 and

simultaneous discontinuation of old Power PCB with
P/N 82 90 641.

2.Faults caused by old Power (PCB P/N 82 90 641) in conjunction
with certain ECG monitor models take the form of superimposed
noise on the ECG signal. These ECG monitor models are not
adequately shielded against electric interference. It is unlikely
that the user would interpret this noise as an ECG signal. This
noise can also cause interruptions of the ECG signal.

Solution: Re 1:

Installation of the new Power PCB P/N 82 90 771. This installation
requires mechanical modification as described in the conversion
instructions 2M 21 923 "New Power PCB for units up to ARLN-

0999". The twin temperature sensor (P/N 2M 20 859) must be

replaced in addition by a new one when replacing the old Power
PCB (P/N 82 90 641) with the new one (P/N 82 90 771).

Re 2:
The ECG monitor manufacturers may remedy this problem by way
of appropriate measures (filter, other cable, different routing of cable
etc.).
The problem can also be rectified by replacing the old Power PCB
(P/N 82 90 641) with the new one (P/N 82 90 771). This installation
requires mechanical modification as described in the conversion
instructions 2M 21 923 "New Power PCB for units up to ARLN-

0999". The twin temperature sensor (P/N 2M 20 859) must be

replaced in addition by a new one when replacing the old Power
PCB (P/N 82 90 641) with the new one (P/N 82 90 771).

6132.200 Babytherm 8000 WB / OC TSB No. 4 November 1999 1/2

Dräger Medical, Inc.

Devices affected: All Babytherm 8000 WB / OC with mattress heating shipped prior to

December 1997 up to and including S/N ARLN-0999.

When: Re 1:

When performing repairs, update to new Power PCB.
Re 2:

If customers request problems with ECG monitor to be rectified by
Dräger. The old Power PCB with the P/N 82 90 641 is not to be
replaced as a preventive measure.

Additional Info: Babytherms fulfill the EMC standards with or without this

modification, see section technical data in the Operating Instructions
Babytherm 8000 WB.

Cost: Covered by Customer
Ordering Info: Power PCB (P/N 82 90 771)

Twin Temperature Sensor (P/N 2M 20 859)

Distribution: Dräger Service Personnel and Authorized Service Organizations for

NCS products.

If you have any questions, please contact Technical Support by
phone at 1-800-543-5047 or by fax at 1-215-723-5935

Dräger Medical, Inc.
Technical Product Manager

Andreas Lenke

6132.200 Babytherm 8000 WB / OC TSB No. 4 November 1999 2/2