Probe Led Indicators; Audiometry Mode; Transducers; Intensity Levels - Welch Allyn TM286 Directions For Use Manual

Directions for Use

Probe LED Indicators

Probe:
Steady yellow:
Blinking green:
Steady green:
Steady orange:
No Light:

Audiometry mode

Frequencies:
Accuracy:
Total Harmonic Distortion:

Transducers

Audiometric Headset
Insert Earphones:

Intensity Levels

Frequency
125 Hz
500 to 4000 Hz
6000 Hz
250 and 8000 Hz
Note
An additional +10 dB is available per frequency via the +10 dB button.
Accuracy:
Step Size:
Signal-to-Noise Ratio:
Rise/Fall Time:
125, 250, 500, 750, 1000, 1500, 2000, 3000, 4000, 6000, 8000 Hz
< 2.5% (125 to 3000 Hz measured acoustically at maximum dB HL; 4000 and
Pair External Headset earphones Type 51 cushions (10 ohms impedance)
External Headset earphones
-10 to 50 dB HL
-10 to 90 dB HL
-10 to 85 dB HL
-10 to 70 dB HL
> 70 dB in 1/3 octave; less than -10 dB HL for levels less than 60 dB HL
Standards, Specifications, and Accessories
6000 Hz measured electrically
Headband force per ANSI S3.6 and IEC 645 (4.5 ±0.5)
Ear Tone Insert earphones (50 ohm impedance)
Intensity
63
Occlusion
Ready to start
Test in progress
Leak in pressure
Test is finished
±2%
125 to 4000 Hz ±3 dB
6000 and 8000 Hz ±5 dB
5 dB
20 to 50 msec