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For use with HFM-6 and HFM-7's, Rechargeable Battery, User Adjustable Gain
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.
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. 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 amplifieroffset 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.
|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%|
|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||1000 MOhms||1000 MOhms|
|Input Noise||0.2 µV||0.2 µV|
|Full Scale Output||6 Volts||6 Volts|