Siemens SD28 Diagnostic Audiometer, GBP 599.00 – Picture 0

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Siemens Sd28 Diagnostic Audiometer

GBP 599.00

Bognor Regis, West Sussex, United Kingdom
Jan 30th

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SD28 Diagnostic Audiometer Supplied with : TDH39 B71 Patient Response Switch Mains lead BS IEC Carry Case Operators manual in pdf Fully tested and working fine Technical Specifications Channels 2 separate and identical channels Pure tone frequencies AC and SP: 12 standard 125 - 8000 and 12500 Hz BC: 250 – 8000 Hz standard frequencies Accuracy: Better than ±1 %. Modulation FM (Warble): 1 - 20 Hz in 1 Hz steps. Mod. width 1% - 25% in 1% steps AM for SISI: 5, 4, 3, 1, 0.75, 0.50, 0.25 dB steps Attenuator 1 dB / 2.5 dB / 5 dB step resolution over the entire range Attenuator accuracy In whole range: better than 3 dB Between two consecutive attenuator positions: 5 dB jump: better than 1 dB 2.5 dB jump: better than 0.75 dB 1 dB jump: better than 0.3 dB HL Range Maximum output will be limited by the transducer. AC: -10 to 120 dB HL at mid-frequencies BC: -10 to 70 dB at mid-frequencies MHA function Low pass cut-off frequencies: 250 Hz, 500 Hz, 1 kHz or 2 kHz High pass cut-off frequencies: 1 kHz, 2 kHz, 3 kHz or 4 kHz Amplification options: 0, 5, 10, 15, 20, 25 dB Masking Narrow band noise, Speech noise and White band noise Total harmonic distortion Air conduction: < 2.5 % Bone conduction: < 5 % Selectable transducers AC: TDH39, HDA200, and EarTone 3A BC: B71 (Mastoid / Forehead) SP: TDH39, HDA200, EarTone 3A, Free-Field amplifier/loudspeaker Transducer options depend on how the SD28 is calibrated. Outputs AC: 2 x mono-jack, 1/4 ” BC: 1 x mono-jack, 1/4 ” SP: 2 x mono-jack, 1/4 ” External inputs CD/Tape: 0.2 to 2.0 Vrms, 10 k? 2 x RCA phone Microphone: 0.002 to 0.02 Vrms, 2 x 8-pole DIN Talk-back: 0.002 to 0.02 Vrms, 5-pole DIN for all microphones: DC bias for electric Mic. Optional input resistance between: 10 k? and 600 ?. Interrupter Normal: The signal is presented when the INT button is pressed. Inverse: The signal ceases when the INT button is pressed. Pulse: The signal is pulsed The pulse frequency can be adjusted in the range 0.25 to 2.5 Hz in 0.25 Hz steps. Impulse: The signal is presented for a preset period of time: 0.25 to 2.5 sec., in steps of 0.25 sec. Operator output Two stereo monitor sockets (8-pole DIN horseshoe) for headphones. One socket is fitted with a Talk – Over Mic. Input option. The monitor signal follows the test signal, although the volume can be adjusted individually for each channel. Talk-back signal from patient to operator is mixed with the monitor signal. RS-232 interface Format: 8 data-bit, 1 stop-bit Parity: Equal Baud rate: 9600, 19200, 38400, 57600 Baud Protocol: XON/XOFF Transport and storage Temperature: -40°C to + 70°C Relative humidity: 10% to 90 % Air pressure: 500 hPa to 1060 hPa Operating range Temperature: +10?C to +35 ?C. Relative humidity: 30% to 90 %. Air pressure: 860 hPa to 1060 hPa Warm-up time < 10 min. Disposal The SD28 can be disposed of as normal electronic waste. Dimensions Approx. 355 x 415 x 130 mm, 14 x 16.5 x 5.1 inches Weight Approx. 4 kg. Power supply Internal, 100 - 240 VAC, 50/60 Hz Power consumption < 60 VA Fuses 100-240 V AC: T1AL/250V Standards Audiometer: EN60645-1, EN60645-2, EN60645-4, and ANSI S3.6-1996 Classifications Type of protection against electric shock: Class I Degree of protection against electric shock: Type B applied part Mode of operation: Continuous operation Miscellaneous Internal power supply to CD player: 1.5 - 10 V, 0.5 V steps Software adjustable contrast/brightness on display and LED’s. Integral talk-over microphone. Loudness scaling socket connection. 5-pole DIN Please note any import duties are the responsibility of the buyer. Disclaimer Information on this page may be partial or incomplete and may contain mistakes or inaccurate information. Seller disclaims any obligation, responsibility or liability which concerns or relates to any information on this page.

Condition	Seller refurbished : An item that has been restored to working order by the eBay seller or a third party not approved by the manufacturer. This means the item has been inspected, cleaned, and repaired to full working order and is in excellent condition. This item may or may not be in original packaging. See the seller’s listing for full details.
Seller Notes	“Reasonable condition slight wear on button sides small mark on top where screw was too long now replaced”