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4115, AC/DC Coupled LIVM Power Unit

When using IEPE sensors at very low frequencies (<5 Hz) or for quasi static (close to DC) applications, the method of decoupling the sensor signal from the approximate +10 volt DC bias of the sensor amplifier, can be a limiting factor in system...
4115, AC/DC Coupled LIVM Power Unit
4115, AC/DC Coupled LIVM Power Unit
Features:
  • Weight 907 grams
  • Size (5.5x1.8x8.0 in)
  • BNC input connector
  • BNC output connector
  • unity gain
  • single channel
  • line powered 50-60 Hz
  • Desktop or Rack mounted with up to 10 units
Manufacturer:  Dytran Instruments Inc.
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Datasheet
Description
Specifications
Downloads
Similar Products
4115 - Description

When using IEPE sensors at very low frequencies (
The conventional method of decoupling used in most Dytran power units is by means of a 10 µF capacitor. This capacitor, working into the input impedance of the readout instrument, acts as a high pass filter, effectively limiting the low frequency response of the measurement system.

The model 4115B power unit provides an alternative DC coupling mode. In this mode, the output signal from the sensor is restored to a zero volts bias level by use of a DC-coupled, level shifting circuit, actually, a summing amplifier. An adjustable negative DC voltage is summed with the sensor DC bias (approx. 10 Volts), nulling the output voltage to zero volts.

Other features of the 4115B include an AC/DC coupling mode selector switch for situations where DC coupling is not advisable, such as in thermally unstable environments. A “monitor” switch allows the monitoring of the sensor bas voltage or the output voltage level of the 4115B with a front panel mounted voltmeter.

An “output zero” know on the front panel controls a 10 turn potentiometer which allows the user to very precisely zero the output voltage when in the “DC” coupling mode. This voltage may be monitored by the front panel meter by switching to “output” metering mode.

Model 4115B may be used as a stand-alone “desktop” unit or may be rack mounted in an available 19-inch wide by 5.25-inch high rack adaptor. The narrow width (only 1.65 inches) allows up to 10 model 4115B’s to be installed in the Dytran model 4200 rack adaptor.

4115 - Specifications
Input TypePiezoelectric (IEPE)
# of Inputs1
Output Type±5 V DC
Max Bandwidth100 kHz
Supply Power115 V AC
230 V AC
4115 - Downloads
4115 - Similar Products
  • Current Source Power Unit with gain x1, x10, x100 and optional 2-pole filter
  • Weight 312 grams
  • Size (2.88x4.0x2.3 in)
  • BNC input connector
  • BNC output connector
  • Gain x1 x10 x100
  • Single channel
  • Power source (2) 9V batteries
Input Type
Piezoelectric (IEPE)
# of Inputs
1
Output Type
±5 V DC
Max Bandwidth
50 kHz,
100 kHz
Supply Power
9 V DC (Battery)
  • Line Powered Current Source Power Unit
  • Weight 907 grams
  • Size (5.38x7.92x1.79 in)
  • BNC input and output connector
  • Frequency response determined by sensor, cable length and sensor drive current
  • Desktop or Rack mounted with up to 10 units
Input Type
Piezoelectric (IEPE)
# of Inputs
1
Output Type
±5 V DC
Supply Power
115 V AC,
230 V AC
  • Single channel
  • Line Powered Current Source Power Unit
  • Weight 880 grams
  • Size (5.38x1.79x8.1 in)
  • BNC input connector
  • BNC output connector
  • Gain: x1 x10 x100
  • Frequency response determined by sensor, cable length and sensor drive current
Input Type
Piezoelectric (IEPE)
# of Inputs
1
Output Type
±5 V DC
Max Bandwidth
6 kHz,
60 kHz,
200 kHz
Supply Power
115 V AC,
230 V AC
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