Interface for Accelerometer AS-065

[zulunation]

Hi everyone,

I need to connect accelerometer AS-065 to osciloscope. I failed to find any additional infomation about this device except of the datasheet. 

I datasheet there is power supply specifications witch are not clear enough for me.

Constant current supply IB 4 mA (2 mA ... 10 mA)
max. supply voltage Umax + 24 V (+ 18 V ... + 30 V).

As far as i know this device must be connected using current loop. As device does not have an internal power supply so it must be connected in serial. The informatioanl signal is a current which changes to reflect the usefull information. Am I correct?

What does theese current and volatage intervals meen ( 2-10 18-30)?

Thanks in advance

[Carisa_L]

Hi zulunation,

These forums are meant to specifically support NI products and customers. However, perhaps this link can be of use: http://forums.ni.com/t5/Multifunction-DAQ/is-it-possible-to-connect-accelerometer-to-ni-usb-6008/td-...

Best,

Carisa

[Henrik_Volkers]

Since it is a NI board I asume the scope is NI scope card 😉

However this problem occures whenever a ICP (IEPE, deltatron, ...) sensor should be measured with a voltage input.

This two wire device need a current soource with 4mA and you measure a voltage across these two wires which is composed of the signal (mV/g or mV/(ms²) ) and a constant bias of 8-12V

here a copy and paste from another post:

As already noted you probably  need a 4mA exitation current to run the sensor  and a decoupling capacitor

A 4.5mA  current limiting diode is for example the CCL4500  see http://www.centralsemi.com/PDFs/products/CCL0035_V2.PDF

(and they have a request sample button and the 3.5mA type will work too  )  and two 9V blocks or a 18V Voltage source

The decoupling capacitor should be a 470nF (or higher) foil capacitor

How to put it together is noted here

http://www.pcb.com/techsupport/tech_signal.php

Or you can buy a signal conditioning box from PCB (or B&K, or Kistler, or ...) or a ICP (IEPE) card from NI

Another simple current source can be build with a BF245C JFET and a 500 Ohm resistor ....