Welch Allyn Micro Tymp 1 Service Manual page 21

Tympanometric system
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Section 2.4 Service
MT 1 CALIBRATION PROCEDURE
Step 18
DISPLAY TEST:
IN THE CALIBRATION MODE, ALL SEGMENTS OF THE DISPLAY SHALL BE LIT AND CONSISTENT.
FIGURE STEP 18 "DISPLAY TEST PATTERN" (from A01785 fig.3H)
Step 19
CHARGE CURRENT TEST:
REFERENCE A-01777 TEST SPEC. FOR LEVEL 3, STEP 6.
SETUP AMMETER IN LINE BETWEEN A 14 VDC POWER SOURCE AND THE MICRO TYMP 1
(WITH BATTERY). ACCEPTABLE READING IS 5.7 TO 7 MILLIAMPS.
END CALIBRATION
CALIBRATION NOTES:
date____/____/____
pg 18

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