United States Nuclear Regulatory Commission - Protecting People and the Environment


ACCESSION #: 9608090214



          FAX Message

                                                            TSI

TSI Incorporated



Environmental Measurements & Controls Division         1 800 777 8356

500 Cardigan Road                                      Tel: 612 490 2711

Shoreview, MN 55126-3996                               Fax 612 490 2874



                                                     Date: August 7, 1996



Organization: Nuclear Regulatory Commission

        Attn: Operations Center

         FAX: 301-816-5151

         Tel: 301-816-5100



        From: Richard Remiarz

          Re: 10 CFR Ch. (1-1-95 Edition)

              Section 21.21 (a)(1)

       Pages: 4



The attached documents are being faxed to the NRC Operations Center to

meet the notification requirements of the above-referenced section.  If

you have any questions, please feel free to contact TSI Incorporated at

800-876-9874.



Environmental Measurements    612 490 2888

and Controls Division         Fax: 612 490 2874

500 Cardigan Road

P.O.  Box 64394

St.  Paul, MN 55164

U.S.A.



TSI



YOUR IMMEDIATE ATTENTION REQUESTED

Potential Problem Affecting Some Air Velocity Test Instruments



August 7, 1996



Dear Quality Assurance Manager:



This letter is being mailed to all NUPIC members.  Acting in accordance

with the requirements of MIL Standard 45662A, we are sending the attached

letter to all identified owners of the following instruments within the

next 30 days:



          VELOCICALC [Registered Trademark] Models 8355, 8357,

                         8360, 8382, 8383, 8388

          VELOCICHECK [Registered Trademark] Models 8330, 8340

              ACCUBALANCE [Registered Trademark] Model 8370

            DP-CALC [Registered Trademark] Models 8702, 8704



If you have any questions, please contact me at 800-777-8356.



Sincerely,



Richard J.  Remiarz, Business Unit Manager

Industrial Test Instruments Group

Environmental Measurements & Controls Division



Environmental Measurements         612 490 2888

and Controls Division              Fax: 612 490 2874

500 Cardigan Road

P. O. Box 64394

St. Paul, MN 55164

U.S.A.



TSI



August 7, 1996



Attn:     Quality Assurance Manager

          Calibration Laboratory Manager



Dear Valued Customer,



We have recently discovered a problem that can potentially affect the

performance of some instruments under certain environmental conditions.

Printed circuit board assemblies manufactured by one of our vendors have

been found to be contaminated with a microscopic coating of residue.  At

times the residue can act as a conductor.  causing current leakages that

can affect the performance of the instrument.  The effect of the current

leakages can vary from extraneous segments appearing on the display to

drifting zero levels or errors in readings.  The problems Primarily occur

when the printed circuit board is exposed to elevated temperature and

humidity levels.



To resolve any problems caused by the contamination, TSI is recalling

instruments that are potentially affected.  Instruments returned to TSI

will be disassembled, printed board assemblies will be cleaned, and the

instruments reassembled and recalibrated.  Units will be returned with a

new calibration and calibration certificate.  As found data will not be

taken unless specifically requested.



We have determined that the following instruments potentially have this

problem:



     VELOCICALC Models 8355, 8357, 8360, 8382, 8383, and 8388 with serial

     numbers beginning with the digits 604 through 606 or 9604 through

     9606



     VELOCICHECK Models 8330, 8340 with serial numbers beginning with the

     digits 9601 through 9606



     ACCUBALANCE Model 8370 with serial numbers beginning with the digits

     601 through 606



     DP-CALC Models 8702, 8704 with serial numbers beginning with the

     digits 9604 through 9606



To arrange for returning the instrument to TSI, please call 800-777-8356

or (001) 612-490-2711 or fax 612-490-2874 and TSI personnel will provide

a Returned Material Authorization (RMA) number and instructions on where

and how to ship the instrument.



We apologize for any inconvenience this potential problem may cause.  If

you have any questions, please call TSI at 800-777-8356.



Sincerely,



Richard R. Remiarz, Business Unit Manager

Industrial Test Instruments Group

Environmental Measurements and Controls Division



nupicltr.doc



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