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CMCP-1100 Industrial Low
Cost Accelerometers are of the “ICP” type, which are the Industry Standard.
All ICP accelerometers are powered using a CCD or “Constant Current Diode”
between 2 and 10 mA. Portable devices with short cables, to conserve battery
life, use a CCD in the range of 2.0 mA. CMCP500 Series Monitors, which may need
to power longer lengths of instrument wire, use a 4.4 mA CCD.
Recommended power
supply voltage is 24 VDC although supply voltages between 18 and 30 VDC can be
used. Bias Output Voltage for the CMCP-1100 is usually close to 10.0 VDC and is
not dependent on power supply voltage.
Wiring for the CMCP-1100
Accelerometer is very simple however if completed incorrectly permanent damage
to the Accelerometer will result.
******
Do not wire Accelerometers directly
to Power Supply. *******
A Constant Current
Diode differs from a regular Diode in that it will pass unlimited current in the
reverse direction. Be sure CCD is installed properly polarized or Accelerometer
will be damaged.
The following diagram
shows how to properly wire an ICP accelerometer to an external power supply and
read out device such as a Digital Volt Meter (DVM) or Oscilloscope:
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