Phone: (540) 961-3576     Fax: (540) 953-3010      e-mail: mkt@vatell.com

AMP-6

For use with the HFM-7's
Rechargeable Batteries

AMP-6  (for use with HFM-6 and HFM-7 series - 5 gain settings)
specification sheet also available in PDF file

Vatell AMP-6

 Advantages:

- Isolated from power lines to eliminate ground loops
- Captures the full range and bandwidth of heat flux signals
- Powered by long life 9-Volt Nickel-Cadmium cells
- 12 hours of operation on one battery charge
- Input cables and battery chargers included

Specification:
 
 
Heat Flux Channels
Temperature (RTS) Channel 
Gain Settings
1, 100, 500, 1000, 5000
 1, 100, 200, 500
Gain Accuracy (%)    
Gain = 1
± 0.6
± 0.6
Gain = 100
± 1.5
± 1.5
Gain = 200, 500
± 1.5
± 1.5
Gain = 1000
 ± 2.1
  
Gain = 5000
± 3.6
  
Bandwidth    
Gain = 1
 1 MHz
 1 MHz
Gain = 100
 150 kHz
150 kHz 
Gain = 200
 
100 kHz
Gain = 500
 50 kHz
50 kHz 
Gain = 1000
 25 kHz
 
Gain = 5000
 5 kHz
 
Input Impedance
 109 Ohms
 109 Ohms
Input Noise
 0.2 µV
 0.2 µV
Full Scale Output
 6 Volts
6 Volts 

Principle of Operation:
The AMP-6 Signal Conditioning Amplifier is designed for use with the HFM series.  Heat Flux signals of the transducer are amplified by a low noise, wide-band differential amplifier whose gain may be set at one of five discrete values between 1 and 5000.  The Resistance Temperature Sensor (RTS) is driven by a constant current of 100 mA.  The resulting voltage is amplified by a low noise differential amplifier whose gain may be set at one of four discrete values between 1 and 500.

Construction:
All signal connections are at the rear panel of the amplifier.  A four-pin female Lemo connector is provided for leads from the Heat Flux Microsensor.  Male connectors are provided for amplified heat flux and temperature output signals.  Batteries are recharged using a NiCd charger that uses 120V AC power. The amplifier has a power switch on the front panel.  Gains for heat flux and temperature signals are selected by multiple position switches.  Ten-turn potentiometers are provided for screwdriver adjustment of the heat flux amplifier offset and setting of the temperature reference point.  A battery test switch, state of charge, and charging indicator allow checking of the battery state and monitoring of the recharge process.

Dimensions:

Height: 1.7 inches    Width: 7.5 inches    Depth: 11 inches    Weight: 46oz

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