Probe led indicators, Audiometry mode, Transducers – Welch Allyn TM286 Auto Tymp - User Manual User Manual
Page 67: Intensity levels, Probe led indicators audiometry mode transducers
Directions for Use
Standards, Specifications, and Accessories
63
Probe LED Indicators
Audiometry mode
Transducers
Intensity Levels
Probe:
Steady yellow:
Occlusion
Blinking green:
Ready to start
Steady green:
Test in progress
Steady orange:
Leak in pressure
No Light:
Test is finished
Frequencies:
125, 250, 500, 750, 1000, 1500, 2000, 3000, 4000, 6000, 8000 Hz
Accuracy:
±2%
Total Harmonic Distortion:
< 2.5% (125 to 3000 Hz measured acoustically at maximum dB HL; 4000 and
6000 Hz measured electrically
Audiometric Headset
Pair External Headset earphones Type 51 cushions (10 ohms impedance)
Headband force per ANSI S3.6 and IEC 645 (4.5 ±0.5)
Insert Earphones:
Ear Tone Insert earphones (50 ohm impedance)
External Headset earphones
Frequency
Intensity
125 Hz
-10 to 50 dB HL
500 to 4000 Hz
-10 to 90 dB HL
6000 Hz
-10 to 85 dB HL
250 and 8000 Hz
-10 to 70 dB HL
Note
An additional +10 dB is available per frequency via the +10 dB button.
Accuracy:
125 to 4000 Hz ±3 dB
6000 and 8000 Hz ±5 dB
Step Size:
5 dB
Signal-to-Noise Ratio:
> 70 dB in 1/3 octave; less than -10 dB HL for levels less than 60 dB HL
Rise/Fall Time:
20 to 50 msec