Unidad combinada marca mettler mod. 994

Ultrasonic Generator Specifications:
Frequency: 1.0 MHz 5%
3.2 MHz 5%
3.3 MHz 5%
Modes: Continuous
Pulsed—20% duty cycle
Pulsed—50% duty cycle
Modulation: 100%
Modulation Waveform: Rectangular
Pulse Repetition Rate:
Modulation Frequency
100 Hz 20%
Pulse Duration:
Modulation Period
2 msec 20%, 20% duty cycle
5 msec 20%, 50% duty cycle
Temporal Peak/ average
intensity ratio:
5:1 20%, 20% duty cycle
2:1 20%, 50% duty cycle
Maximum output power: 22 w with a 10 cm applicator, (me 7310)
11 w with a 5 cm applicator, (me 7513)
2.2 w with a 1 cm applicator (me 7331)
Maximum intensity: 2.2 w/cm with all applicators
Indication accuracy: 20% (for any level above 10% of maximum)
Output description: The output waveform is continuous or pulsed as programmed
by the membrane panel control. In the pulse mode the 1, 3.2
or 3.3 MHz square wave pulses
are modulated. The power level is adjusted by varying the
pulse amplitude. The pulse waveforms are shown
below:
Time
Output
1, 3.2 or 3.3 MHz
Ultrasound
Pulse Width
2 ms
Pulse Space
10 ms
Figure 3.1—Pulse Waveform—20% Duty Cycle
Time
Output
1, 3.2 or 3.3 MHz Ultrasound
Pulse Width
5 ms
10 ms
Pulse Space
Waveform Specifications:
Interferential Mode
Figure 3.8—
Interferential Waveform
Waveform Type: Sinewave
Polarity: None
Volts: 0-65 volts rms, 1 Kohm load
Current: 0-65 mA rms, 1 Kohm load
Average current at
maximum intensity
and frequency: 65 mA rms
Maximum current
density under 2"
diameter electrode. 3.2 mA/cm Frequency: Channel 1 = 4000 Hz
Channel 2 = 4000 to 4250
Hz variable frequency sine wave
Frequency Modulation: 1-15 Hz
80-150 Hz
1-150 Hz
xx-xx Hz,
xx=any value from
1 to 250 Hz
Phase Duration: 125 μs
Available Amplitude
Modulation Options: Vector rotation
Available Channels: Channel pairs 1 & 2 or 3 &4
Premodulated Mode
Figure 3.9—Premodulated
Waveform
Waveform Type: Amplitude modulated
sine wave
Polarity: None
Volts: 0-50 volts rms, 1 Kohm load
Current: 0-50 mA rms, 1 Kohm load
Average current at
maximum intensity
and frequency: 50 mA rms