BRUEL & KJAER 2305 - Mechanical Specification Details

Input Potentiometer: Non-calibrated
Input Attenuator:
Covers 0-12 dB, continuous variable.
Within ± 0.25 dB, relative to position "0".
Six
steps of 10 dB
RECTIFIER RESPONSE: Selectable by a control knob:-
WRITING SPEEDS:
RMS ± 0.5 dB for crest factors up to 5.
Arithmetic Average.
Peak (half peak-to - peak).
Selectable by a control knob.
50 mm paper: 2 - 4 - 8 - 16 - 25 - 40 - 63 - 100 - 160
250 - 400 - 500 - 630 - 800
- 1000 mm/sec .
100 mm paper : 4 - 8 - 16 - 31.5 - 50 - 80 - 125 - 200
315 - 500 - 800 - 1000 - 1250 - 1600 - 2000 mm/sec.
RECORDING SYSTEM: Electrodynamic . Pulling force 1 kg approx.
External arm connection possible.
OVERALL STABILITY: Better than ± 0.2 dB in deflection for ± 10 %
deviation in power supply voltage .
CALmRATION
VOLTAGE:
LOWER LIMITING
FREQUENCY:
PAPER SPEEDS:
TYPES OF
RECORDING:
TYPES OF
TRANSCRIPTION:
126
Built-in square-wave signal at power supply fre-
quency. 100 mV RMS.
Stability: Within ± 1 % for ± 10 % deviation of
power voltage .
Selectable to 2, 10, 20, 50, and 200 Hz (cis).
MECHANICAL
Selectable by a control knob.
0.0003 - 0.001 - 0,003 - 0.01 - 0. 03 - 0.1 - 0.3 - 1 - 3 -
10 - 30 - 100 mm /sec. derived from a reversible self·
starting synchronous motor.
Rectilinear .
Polar: Synchronous drive with B &: K Turntable
Type 3921.
Pens for ink writing, easily interchangeable for
writing in different colours .
Sapphire Stylus for writing on wax-coated paper .