Home > Himmelstein 721 Mechanical Power Instruments available from Hylec Controls

Himmelstein 721 Mechanical Power Instruments available from Hylec Controls

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Himmelstein Mechanical Power Instruments, available from Hylec Controls , are advanced instruments that provide engineering unit display of a strain gage (mV/V) input and a frequency input. They also compute power and perform 21 functions including limit checks, tare, hold, and maximum/minimum capture. Users need not write code or add hardware to be up-and-running a productive test.

The two line alphanumeric readout displays measured and computed data, units of measure and test status. Transducer calibrations are fully automatic, requiring no manual adjustments.

  • The following are general specifications of the model 721 Mechanical Power Instrument:
    Strain gage input: Any 80Ω to 2kΩ transducer directly wired or transformer coupled. 4, 6, or 7 wire circuits are accommodated.
  • Transducer excitation: 3Vrms, 3030Hz ±0.01% sine wave; regulated and short circuit protected.
  • Sensitivity: 0.5 to 5mV/V with 50% overrange; automatically scaled.
  • Input impedance: 100MΩ in parallel with 33pF.
  • Automatic null range: In-phase signals: ±10% of full scale (with 50% overrange), 60% of Full scale (with 0% overrange); Quadrature signals: ±1mV/V.
  • Automatic null: In phase: ±10% of F.S. (with 50% overrange), ±60% of F.S. (with 0% overrange); Quadrature: ±1mV/V.
  • Auto calibration: Dual polarity shunt calibration with provision for CAL resistor feedback.
  • Spurious signal rejection: 60Hz: 120dB common mode, 100dB normal mode; Carrier quadrature: 60dB.
  • Antialias filter: 200Hz, 7 pole Bessel response filter.
  • Low pass filtering: 4 pole Bessel response digital filter with 11 cutoff frequencies from 0.1 to 200Hz in 1-2-5 steps.
  • Signal-to-Noise Ratio1: with 1/10/100/200Hz filters 86/76/66/62dB at 1mV/V F.S. and 86/80/72/66dB at 5mV/V F.S.
  • Resolution: 0.01% of F.S.
  • Overall accuracy (at 77°F/25°C): 0.02% of F.S., worst case.

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