Welch Allyn AudioScope, Руководство по обслуживанию

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2.7 Calibration Procedure, Multi Level AudioScopes
23300 (MICROCONTROLLER type, serial no.9670000 and higher)
(continued)
• 2.7.11_____ step 5 Sound Level: Follow steps "a" - "h" below.
a___ Set Run/Cal switch on T-13765 to "RUN" position.
b___
Attach AudioScope Calibration Box T-13765 to
8 pin header connector with orange wire of T-13765 connector
towards crystal.
c___ Turn AudioScope3 On and set to "25 dB"
Observe Green LED. It should be lit.
d___ Place the RUN/CAL switch on the cal box to the
"CAL"
position. The green READY light should flash. The orange PT
(PreTone) light should be on.
e___ Use the 1000 Hz filter on the B&K, adjust the PreTone level to
the specified level per A00985 (in Section 5 of this manual),
using the UP and DOWN buttons on T-13765. (The level will
change in prescribed increments each time the buttons are
depressed.
f___ When desired level is set, depress the SAVE & INCR button.
The handle will move to the next tone to be adjusted.
Repeat above sequence for all remaining frequencies. Select correct filter on
B&K.
g___ Switch unit to 40 dB. Repeat above process only checking
readings are in tolerance, but not making adjustments. Switch
unit to 20 dB. Repeat checking.
h___ Switch the RUN/CAL switch RUN position. Microcontroller
AudioScope3 is now calibrated, and will run with new settings.
•
2.7.12____ step 9 Charge
•
2.7.13____ step 10 Lamp Ejector
•
2.7.14____ step 11 Trained Listener
Calibration is complete . If AudioScope3 (Microcontroller) does not take calibration,
proceed to troubleshooting section. After repair of the AudioScope3, calibrate.