The probe check starts automatically. If it does not, press the
Start
button to
start the check.
The probe is checked for occlusion and leakage. If the probe check result shows
a value of 1.9 - 2.1 mmho/cc/ml at 226 Hz, the probe is OK. If not, we recom-
mend that you make an admittance calibration.
Additional probe admittance checks can be performed. See the MADSEN
Zodiac Reference Manual.
If there is a probe error
In case of a probe error, the probe may be occluded or faulty.
•
If the probe is occluded, clean or replace the probe tip.
•
If the probe is faulty, contact an authorized service department for repair.
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Technical specifications
Type identification
MADSEN Zodiac is type 1096 from GN Otometrics A/S
Compliance measuring system
Probe tone:
226 Hz at 85 dB SPL ± 3 dB
Dynamic probe tone level:
The probe tone level will be compensated to accommodate varying ear canal
volumes.
The output level will be decreased in volumes < 1.7 ml
The output level will be increased in volumes > 2.3 ml
THD:
< 1% in 2 cc
Frequency accuracy:
± 0.5%
Range:
0.2 ml to 5.0 ml ± 5% or 0.05 ml whichever is greater *
5.0 ml to 8.0 ml ± 15% *
* The accuracy stated requires that calibration has been performed at the alti-
tude where the device is to be put into operation
Acoustic reflex
Sensitivity
Reflex Threshold and Reflex Decay:
0.01, 0.02, 0.03, 0.04 or 0.05 mmho
Reflex Screening:
0.04 mmho
Step size dB:
Quick Check: 10 dB
Otometrics - MADSEN Zodiac
User Guide
26
