Calibration accelerometer 86517 Bently Nevada

How to calibrate Accelerometer 86517 Bently Nevada,
To perform these procedures, Firstly prepare the following tools:

• Function Generator (50 ohm output)
• DC power supply -24 Vdc
• Multimeter
• Small screw driver
• Capacitor 0.01 microfarad 1% capacitor, (BNC conector P/N 00448308)

Step to calibrate:

1. Connect power supply  to the - 24 Vdc and COM terminals on the accelerometer, and adjust the output of power supply to -24Vdc, connect multimeter to the +ACCEL terminal, connect capacitor 0.01 microfarad to function generator, the input should connect to terminal C and leave pins A and B not connected. Don't forged to connect the interface module case to common through the case sheild terminal. Make sure the interface module case is netral
2. Adjust the function generator to null output level and measure the acceleration signal with the multimeter, if the reading is more than a few milivolts rms then setup is probably injecting power line noise into the charge amplifier, this noise must be eliminated, reduce lead lengths and changing lead routing
3. Adjust the function generator output to 0.3535 Vrms sine wave at 100 Hz for a transducer sensitivity of 50 pC/g, or 0.707 Vrms for tranducer sensitivity of 100pC/g
4. Measure the acceleration output with the multimeter. If the output reads 0.3535+/-7.0 mV rms go to step 8, If the output does not read 0.3535 V rms +/- 7.0 mV rms continue with step 5
5. Unscrew the four screws at each corner of the lid
6. Open the lid and fold it back
7. Adjust the potentiometer until the multimeter reads 0.3535 +/- 7.0 V rms, close and tighten the lid and verify thet the multimeter still reads 0.3535 V rms, if it does not repeat step 6 and 7, be aware when the lid is open the circuit is unshielded and the charge amp can pick up noise.
8. Disconnect the input from pin C and connect it to pin A and leave pin C and B unconnected, verify that the multimeter still reads 0.3535 Vrms +/- 7.0 mVrms. If it does not then check your test setup as step 2 and repeat this step. If the test is not passed, replace the interface module.

Manual Book ACCELEROMETER 86517 Bently Nevada will be posting next...
(reff: http://www.sensortransducer.com)