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2.3a Lists of Tools/Fixtures/Documents for Service
and Calibration*
* The U.S. Occupational Safety and Health Administration (OSHA)
recommends that audiometers be calibrated annually. Arrangements for
calibration can be made by returning the instrument registration card. In
addition a daily biological check may be performed. This is accomplished
by a person with known normal hearing who listens to the tones for
intensity and quality. There is a moderate fee for recalibration.
Properly trained technicians will need specialized commercially
available test equipment, custom made (Welch Allyn T-tools) specialized
tools and fixtures, basic electronic hand tools and Welch Allyn
specifications and drawings to properly diagnose, calibrate, and repair
the AudioScope and charger base.
Item description: Function: T #&M#
B&K 2231 Modular Precision Sound Level Meter Measures sound output
B&K 4134 1/2" Microphone Sound pick-up
B&K 1625 1/3 to 1 Filter Acoustic filter
B&K Power Supply (6 V.D.C.) Powers B&K 2231
Knowles DB100-R 496 Occluded Ear Simulator Connects T-1393 and T-2011
Knowles DB-009 Teflon washers Seals microphone and DB-100 connection
Fluke 1900A Frequency Counter (3% accuracy) Calibration and testing
Oscilloscope Tektronix 2230A or
Equiv. (storage type) Calibration and testing
ESD mat and wrist-strap Repair
Electronic Technicians hand tools kit General Repair
Digital Volt Ohm Meter Troubleshooting/Repair
PACE Soldering Equipment* Repair T19102-2
*Set iron to 700ºF +/- 27ºF
Rosin Core Solder, .020", 63Sn/37Pb Repair M-31446
G.E. RTV 108 (Clear/Thick) Repair M-30313
Power Supply (0 - 5 VDC @ 1 Amp) Testing T-3769
AudioScope Holding Device holds AudioScope T-1539
Coupling Tool for Microphone Holds AS to DB-100 assembly T-1393
Latchup Box for AudioScope 1 and AudioScope3
with ASIC
s/n <=969999
Holds Tones T-9783
Microphone Handle Cover Holds Microphone
to DB-100 T-2011
AudioScope Calibrator for Microcontroller
digital adjust (non ASIC) T-13765
Charging jack pin-spanner charging jack ring nut tool T-10912
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