Welch Allyn MicroTymp 3 portable tympanometric instrument - User Manual - Manual (Page 64)

64 Specifications Welch Allyn MicroTymp3 portable tympanometric instrument
Technical specifications
Probe tone
226-Hz Amplitude: 85 ± 3 dB SPL
1000-Hz Amplitude: 83 ± 3 dB SPL
Frequency Accuracy: ± 2%
Total Harmonic Distortion: 3% maximum
Signal Type: Continuous Sinusoid
All specifications measured in an ANSI HA-1 (2.0 cc) coupler.
Pressure measurement system
Direction of sweep: positive to negative pressure
Sweep Rate: 400 daPa/sec average during data acquisition period (applies only at sea level)
Range: +200 to -400 daPa
Display resolution: 20 daPa
Accuracy: ±15% or ±10 daPa, whichever is greater
Compensation: Auto-zero every test cycle
Admittance measurement system
226-Hz mode
Range: 0.2 to 4.0 mmho total
0.0 to 1.5 mmho for Ya
0.2 to 2.5 cc for +200 Vea
Accuracy: ±0.1 mmho or ±5%, whichever is greater
Positive tail compensation
1000-Hz mode
Range: 0.9 to 16.6 mmho total
0.0 to 6.5 mmho for Ya (for ear canal volumes
2.0 cc)
0.2 to 2.5 cc for +200 Vea
Accuracy: ± 0.4 mmho or ± 5%, whichever is greater
Negative tail compensation