United States Nuclear Regulatory Commission - Protecting People and the Environment

95120
ACCESSION #: 9505300147

     FAX Message

                                                       TSI
TSI Incorporated
               1 800 876 9874
Environmental Measurements & Controls Division         Tel: 612 490 2888
500 Cardigan Road                                      Fax 612 490 2874
Shoreview, MN 55126-3996

                                                  Date:  April 24, 1995

Organization:  Nuclear Regulatory Commission
        Attn:  Operations Center
         FAX:  301-816-5151
         Tel:  301-816-5100

        From:  Judie Weyandt
          Re:  10 CFR Ch. (1-1-95 Edition)
               [Section] 21.21(a)(1)
       Pages:  3

The attached documents are being faxed to the NRC Operations Center to
meet the notification requirements to the above-referenced section.  If
you have any questions, please feel free to contract 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.

                   YOUR IMMEDIATE ATTENTION REQUESTED
     Calibration Error Affecting Some Air Velocity Test Instruments

April 24, 1995

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 8350, 8352, 8355, 8357, 8360
          Air Velocity Transducer Models 8450, 8460 and 8470

If you have any questions, please contact me at 800-876-9874.

Sincerely,

Claudia K. Wood, Product Engineer
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

                   YOUR IMMEDIATE ATTENTION REQUESTED
      Calibration Error Affecting Some Air Velocity Test Instrument

April 24, 1995

Attn:     Quality Assurance Manager
          Calibration Laboratory Manager

Dear Valued TSI Customer:

TSI values its reputation as a provider of high quality, accurate
measurement instruments.  As part of our on-going evaluation of our
manufacturing processes, we have identified an error in high air velocity
calibrations.  We have not identified any error at low velocities (below
250 feet per minute).  From 250 to 1000 fpm the error steadily increases
from zero to approximately 2.25%.  The error remains constant at
approximately 2.25% at velocities higher than 1000 fpm.  For example:  If
the instrument displays 1000 fpm, the true velocity would be 1020 fpm.

Figure omitted.

   IMPORTANT: The identified error affects the following instruments:
          VELOCICALC [Registered Trademark] Models 8350, 8352,
                           8355, 8357 and 8360
           Air Velocity Transducers Models 8450, 8460 and 8470

This calibration error affects both new instruments and recalibrated
instruments.  Therefore, in our interest of maintaining high value for
our instrument users, TSI will temporarily provide velocity
recalibrations at no charge on the above-referenced models manufactureded
or serviced between April 1, 1994 and April 19, 1995.  This temporary
offer expires on July 31, 1995.  If you are a user of the VELOCICALC
[Registered Trademark] Plus Model 8360 and you wish to have the humidity
and pressure functions recalibrated as well, we will provide this service
at a reduced rate of $100.  Please contact our Customer Support Service
Group at 800-876-9874 to schedule the return of your instrument for
recalibration.

We value our customers and apologize for any inconvenience this may have
caused you.

*** END OF DOCUMENT ***

 
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