Instruments for Audiology - KLT25 Diagnostic Impedance Audiometer

The KLT25 is an automatic impedance audiometer well suited for all screening or diagnostic applications. The entire standard battery of impedance tests is available, including a choice of manual or automatic reflex testing, ipsi- and contralateral reflex decay, ETF test as well as pure tone audiometry. Each unit comes with a new Combi probe which is ideal for screening and typical diagnostic work. The completely new DSP board developed for this unit results in an unprecedented flexibility in use and a high test speed. It is also lightweight, which facilitates portable use with the optional dedicated hard walled case.

KLT25 Technical Specifications

Standards: Safety: EN 60601-1, Class I, Type B

EMC: EN 60601-1-2

Impedance: EN 61027/ANSI S3.39 Type 1

Audiometer: EN 60645-1/ANSI S.3.39 Type 4 Tone

Medical CE-mark: The CE-mark indicates that Interacoustics A/S meets the requirements of Annex VI of the Medical Device Directive 93/42/EEC. Identification no. 0123.

Tympanometry:

Probe tone:

Frequency: 226Hz all functions.

Level: 85 db SPL

Gain Control: AGC

Air pressure:

Control: Automatic

Range: Default +200 to –400daPa (max. +300 to -600daPa)

Safety limitation: -800 daPa and +600 daPa

Pressure change rate: Selectable in the set-up between 50, 150 and >250 daPa/s or automatic

Compliance:

Range: 0.1 to 6.0 ml (numerical: 0.1 to 8.0 ml)

Function: Automatic, where pump speed, start- and stop pressure can be user-programmed in the set-up. Eustachian Tube Function Williams test, for normal ear drums. Acoustic Reflex Functions

Test Types:

Automatic Reflex: Two independent user selectable protocols.
Automated intensity search functions available for threshold search and reflex growth indication.
Free mixing of Ipsi and Contra.

Manual Reflex: Manual control of all stimuli. May also be used to redo part of automated test results.

Reflex Decay: Manual control, with stimulus duration of 10 sec. Ipsi or Contralateral stimulation.
For safety / comfort reasons an optional limitation of maximum intensity is available.

Contra Earphone: THD39 or insert receiver CIR22 (optional)

Attenuator: 1dB or 5dB steps.

Memory: Internal memory for two ears.

Each ear: 6 Ipsi and 6 Contra recordings. Each may have up to 6 stimuli. Also, there is memory for additional manual reflex recordings. (Total max. 78 reflexes per ear)

Audiometer Functions:

Patient Response:
Connection for patient response switch.

Outputs:Contra TDH39 headset may be used for audiometry. Double TDH39 Headset for audiometry (optional)

Test types: Manual Audiometry. Automatic Audiometry according to ISO 8253-1 (Patient controlled Hughson-Westlake).

Various: RS232: Input/output for computer communication. One mode allows an external PC to both monitor and control the instrument. The control actions can be followed on the display and operation panel.
Online communication, where the measurement data are sent to an external PC, can be selected.

Keyboard: Connection for external keyboard, standard PC type.

Printer: Built In fast thermal printer with paper

Width: 112 mm

Connection for external laser or ink-jet printer:

Language: HP PCL L3 for HP DeskJet and IBM mode for Cannon Bubble jet.

Accuracy:

Stimulation Frequencies:± 1 %

Probe tone frequency: ±1 Hz

Probe tone level: 85 dB SPL ± 1.5 dB measured in an IEC126 acoustic coupler. AGC for ear canal compensation.

Pressure measurement: ± 5% or 10 daPa, whichever is greater

Compliance measurement: ± 5% or 0.1 ml, whichever is greater

Examples of Compatible Windows Software: IaBase95 Database Program PrintView for PC monitoring and printing IA-NOAH-Imp Module for interfacing to NOAH

Construction: Plastic cabinet

Power supply: UPS400 (Included) 100-240V

Warm up time: 10 minutes at room temperature (20 °C).

Consumption: 15VA, max. 45VA

Dimensions: LxWxH 36x26x10 cm/ 14x10x4 inches

Weight: 2.8 kg / 6 lbs.

Air Freight Packing: 48x31x37 / 19x22.2x14.6 inches.

Gross weight: 6.5 kg / 12.4 lbs.

Included Accessories:

Combi Probe System
TDH39 Single Contralateral Earphone
UPS400 External Switch Mode Power Supply
Power Cable (110/220V, please specify)
BET50 Box of 65 assorted Eartips
TPR35 3 Rolls of Recording Paper
Dust Cover
Operation manual

Optional Accessories:

TDH39 Audiometric Headset
EAR-Tone3A Insert Phones for Audiometry
ACC22 Carrying Case
CIR22 Contralateral Insert Phone
Patient Signal
CAT-222 Calibration Unit 0.2 and 5 ml
CAT-227 Calibration Unit 0.2-0.5-1-2-3-4-5 ml
IES-2 Impedance Ear Simulator

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