Model 781 Benchtop Signal Conditioner

The model 781 is a precision, two-channel bench-top signal conditioner for use with all Jewell miniature tilt sensors. Powerful electronics generate balanced AC sensor excitation for up to two tilt channels (X and Y), then amplify, rectify and filter sensor response to produce a high-level DC output signal. Output is ±8 VDC single-ended (±16 VDC differential).

Units conveniently come with two switchable gain and filter settings (high/low; on/off) for added signal processing flexibility. The 781 also includes an amplifier for one LM35 temperature sensor and will drive tilt and temperature signals over 1000m cable lengths. All units include calibration when ordered with Jewell Instruments miniature tilt sensors. Rugged and reliable, the 781 is an ideal choice for any laboratory application.

Additional Information

Weight 32 oz
Dimensions 3.5 × 5 × 8.4 in

Performance Specifications

Input Channels2 Tilt Channel (X and Y), 1 LM35 Temperature Sensor
Output Signal±8 VDC Single-ended
±16 VDC differential
Gain SettingsTwo switchable gains, 10:1 ratio
Standard CalibrationSensor TypeHigh-GainLow-GainRange
755 Series
756 Series
0.1 µradian/mV
1.0 µradian/mV
Output FilterFilter “On” = 7.5 sec
Filter “Off” = 0.05 sec1
Roll-off = 6 dB/octave
Temperature Output0.1°C/mV (single-ended)
Output Impedance270Ω
Power Requirements±11 to ±15 VDC @ 25mA and -25 mA, 250 mV ripple max., reverse polarity protected
ConnectionsDual screw-terminal barrier strips on the rear panel
EnvironmentalOperation: -25° to +70° C
Storage: -30° to +100° C
0-90% humidity non-condensing
MaterialsPainted Aluminum
Accessories1m cable included

*Specifications subject to change without notice on account of continued product development


Outline Drawing
User Manual

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