How shall we connect capacitive accelerometers (MEMS) in Sirius HD-LV?

Hello,

We are trying to connect single-axial capacitive accelerometers (MEMS) by Kistler -> Type 8316A in the Dewesoft Sirius HD-LV.

According to the datasheet, the sensor pinout is:

• 1- Power,
• 2- Return
• 3- N/C
• 4- Output +

In the dewesoft side:

• Exc + (1) and Sns + (6). (Power +)
• Exc - (3) and Sns - (8) (Power -)
• In + (2)
• In - (7)

So we connector is done as follows in dsub9

1. Power
2. Output +
3. Return
4. GND from TEDS
5. N/C
6. Power
7. N/C
8. Return
9. TEDS

+ shield connected.

The problem is that we are getting too much noise in the signal (find picture attached)

Any idea??

Dear Carlos,

thank you for sharing the connection details. I have noticed that you are using a 3-wire sensor. In this case the Pin7 needs to be manually connected to GND.

Please see the picture below:

The missing connection is marked with the bright green colour.

Please let us know if this helped.

Best Regards.

Rok