28 Understanding the LCD messages Welch Allyn MicroTymp3 portable tympanometric instrument
Calibration due
Welch Allyn recommends annual calibration of your tympanometer to ensure equipment
accuracy. The CAL DUE message will display each time the device is powered on when
one year has passed since the last calibration. Press and hold the TEST button for
approximately two seconds to clear this message and resume patient testing or print
information stored in the Handle.
Appropriate charges will apply each time your tympanometer is calibrated.
Needs service
The NEEDS SVC message appears when something has caused the tympanometer to fail
an internal test. The NEEDS SVC message will display for approximately three seconds;
then the device will power down. Return the tympanometer to a Welch Allyn service
location for service. (See Service information.)
-400 -200 0 200
2
0.5
0
1.0
1
GR
A
GR
C
PRESSURE - daPa
Ya - mmho
+200 Vea - cc
After each service, the device must be calibrated. Appropriate charges will apply
each time your tympanometer is calibrated.
-400 -200 0 200
2
0.5
0
1.0
1
GR
A
GR
C
PRESSURE - daPa
Ya - mmho
+200 Vea - cc
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