RPR-4000

The Ritec RPR-4000 is a high power ultrasonic measurement system designed for the non-destructive evaluation of material properties. It allows reproducible measurements using short (down to single cycle) radio frequency tone burst excitations in composites and other difficult materials.

The RPR-4000 provides high power RF tone burst excitations up to 8 kilowatts, providing ability to drive inefficient transducers, such as electromagnetic acoustic transducers (EMATs) or high capacity, low frequency piezoelectric transducers. The low noise broadband receiver has a gain control range of 20 to 100 dB and very low distortion, and is therefore ideally suited for receiving weak ultrasonic signals as those generated by EMATs. All RITEC high power products are protected against over current and over voltage to protect the instruments in case of transducer or wiring failures. The RPR-4000 has an integrated front panel display and keypad for operation without an external control computer, or it might be controlled by a PC via the RS-232 interface.

 

Pulser Unit

  Low Frequency Type Standard Type

   RF frequency (sin-wave tone burst)

50 kHz ... 2 MHz 200 kHz ... 20 MHz
   Output power

50 kHz ... 1 MHz: 8 kW

2 MHz: 5 kW

200 kHz ... 2 MHz: 8 kW

3 MHz: 5 kW

8 MHz: 1.25 kW

20 MHz: 100 W

   Max. pulse width 200 µs
   Max. duty cycle 1 %
   Trigger source Internal, external, or by computer (RS232)
   Internal repetition rate setting 0.08 Hz ... 10 kHz in 42 steps in  1, 1.25, 1.5, 1.6, 2, 2.5, 4, 5, 8, 10 sequence
   External trigger in Positive TTL
   Trigger output Positive TTL
   External RF signal input 1V peak-to-peak, 50 Ω impedance
   Protection circuit Protected agains over current, over voltage, over temperature. Visual and acoustic alarm.

 

Receiver Unit

  Low Frequency Type Standard Type
   Frequency range
50 kHz ... 2 MHz 200 kHz ... 20 MHz
   Low pass filter 0.2, 0.8, 1.6 and 22 MHz 2.5, 5, 10 and 22 MHz
   High pass filter 50, 200, 400 and 800 kHz 0.2, 0.4, 0.8 and 22 MHz
   Number of input channels
2 low noise inputs
   Input impedance
50 Ω
   Total gain
20 ... 100 dB
   Gain control
80 dB in 0.4 dB steps
   Signal output level

Linear output 1V peak-to-peak into 50 Ω.

Maximum output level 6 V peak-to-peak.

   Output impedance 50 Ω
   Pulse output monitor -40 dB (50 Ω impendance)

 

General Characteristics

  Low Frequency Type Standard Type
   Power requirements
AC 85 ... 240 V, 50 ... 60 Hz, 300 VA
   Dimensions 483 × 127 × 432 mm (W × D × H)
   Weight 16 kg

 

RPR-4000-HP High Power

The recently released RPR-4000-HP high power system allows driving EMAT applications with an RF power of up to 15 kW RMS. 2500 Vp-p / 50 Ω, 15 kW RMS with a 0.3% duty cycle are possible. The frequency range covers 20 kHz … 3 MHz. An even more powerful unit delivering up to 20 kW RMS is under development.