Specification for Electronic Stethoscope ES12

Piezoelectric accelerometer input:

Microdot

Microphone input:

LEMO Serie 00

Frequency response hp-amp.:

−3 dB between 30 Hz – 20 kHz

Max. Output voltage hp-amp.:

4 Vss*) an 150 Ω

Distortion factor:

< 1 % at 1 kHz and 4 Vss

Output socket headphone:

3.5 mm stereo jack

Output socket measuring ampl.:

BNC (on rear panel)

Max. output voltage:

5 Vss

Output Impedance:

50 Ω in series with 10 μF

Max. Impedance:

> 10 kΩ, < 10 nF

Frequency response:

−3 dB between 1 Hz – 30 kHz

Microphone power supply voltage:

5,6 V via 8,2 kΩ

Sensitivity (Piezoelectric accelerometer):

1 mV/pC or 10 mV/pC, ±2 %

LED “Supply Voltage”:

green

LED “Charging” (rear):

red

Supply rechargeable battery:

9 V

Supply extern:

9–15 V DC

Battery Charge:

12–14 V, approx. 14 h

Current Consumption:

5 to 15 mA

Battery operating time:

approx. 10–30 h

Operating temperature

range:

+/- 0°C to +50°C

Cabinet material:

Aluminium

Dimensions (W × H × D):

55 × 25 × 100 mm

Weight with batteries:

approx. 250 g

Safety standards:

IEC61010, EMC EN55103-1, EN55103-2