315D/322D: High-Speed Length Controllers

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The 315D and 322D High-Speed Length Controllers gives physiologists the ability to control and measure length of single cells, fibers and whole muscle with ease. Highly sensitive motors allow complete automated control of length of a vast number of biological specimens such as skeletal, cardiac and smooth muscle, connective tissue, and compliant tissue.

These motors provide a range of length control and response times uniquely suited to the needs of the researcher. Our fastest model, the 315D, provides a step change of length in 200µs and a length frequency response up to 2.4 kHz. All models allow the researcher to resolve length changes as small as 1 micron. All models have less than 0.01 micron/mN isometric compliance. With tensile limits of 300mN and 200mN, respectively, our high-speed length controllers have more than enough force for any tissue sample.

The front panel manual length control allows the researcher to set the steady-state arm position. In addition, circuit design prevents the motor from being operated beyond its safe limits.

  • test all muscle types (skeletal, cardiac and smooth) as well as connective tissue
  • fast and accurate
  • step response time from 200µs to 800µs
  • length resolution: 1µm
  • optimal tensile limit (315D – 50 mN, 322D – 100 mN)
  • length response to 2.4kHz
  • automated control and digital display

  • <0.01µm isometric compliance
  • steady-state arm positioning
  • includes soft-start and soft-recovery modes which ensure sample is not damaged during power-up and faults

Models

315D: 50mN Force, Ultra low isometric compliance

322D: 100mN Force, Ultra low isometric compliance

Select References

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Resources

Specifications

Length Specifications 315D 322D
Lever Arm Length [mm] 9 20
Length Excursion [mm] 3 6
Length Excursion [mm] 0.5 0.5
Length Scale Factor1 [mm/Volt ±2%] 0.15 0.3
Length Signal Linearity2 [%] 99.5 99.9
Length Step Response Time3 [millisecond] 0.25 0.4
Sinusoidal Frequency Response4 [Hz] 2,400 1,500

1 = Gain switch set to 1X; 2 = Over full length excursion; 3 = 1 to 99%, critically damped; 4 = -3dB point

Force Specifications 315D 322D
Maximum Force [mN] 300 200
General Specifications 315D 322D
Power Required 100, 120, 220, 240 VAC, 50/60 Hz. Available
Power Consumption [W] 60 60
Controller Weight [kg] 2.7 2.7
Motor Weight [g] 27 43
Controller Dimensions [cm] 21W (1/2 rack mount) x 25D x 9H (2U)
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