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Procedure

December 17, 2018

Vibration Research recommends that our customers implement an annual Calibration Verification for VR9500 testing systems. This lesson describes the procedure and subsequent lessons expand on the details for some steps. Use the checklist in the next lesson to track and document this procedure.


Equipment Needed

  • PC with the newest available version of VibrationVIEW
  • Keysight Digital Multimeter (DMM) with cabling

   1) 34401A (this older unit was sold under the Agilent name)

Serial Cable w/ optional serial to USB Adapter, Power Cable, BNC Adapter

  2)  34410A / 34411A / 34465A / 34461A /34470A/34458A

Ethernet Cable, Power Cable, BNC Adapter, Network Switch

  • Three 50 Ohm Terminators
  • Four 12” BNC Cables
  • 36” BNC Cable
  • Four BNC “T”
  • VRC Differential Cable

 

Connect the Controller to VibrationVIEW

 

Measure IEPE (Accelerometer Power) Voltage and Current

  • Turn on Accelerometer Power for Ch 1 to 4
  • Check IEPE voltage

 1) Connect three 50Ohm terminators to Channels 2, 3, 4.  See Figure 1.

2) Read voltage on DMM

Insert the BNC connector into the two holes on the top right of the DMM’s front panel, with the BNC cable towards the right.

Press the top left button marked V DC.

Figure 2: Connecting the VR9500 to the DMM to read voltage

Connect Ch 1 to the DMM and measure Volts DC

Measure and record Voltage (24 Volts DC + or – 2.4 Volts = 21.6Vdc – 26.4Vdc tolerance)

Measure Accelerometer Power Voltage and record readings for each channel, ensuring that each channel not being measured has a 50Ohm Terminator to prevent any leakage across channels.

  • Check IEPE Current

1) Connect three 50Ohm terminators to Channels 2, 3, 4

2) Setup the DMM to read DC amperage

Press the shift key on the lower right, then press the DC V button on the upper left

Rotate the BNC adapter down and 180 degrees so it is in the bottom right holes on the DMM’s front panel, with the BNC cable towards the left.

Figure 3:  Connecting the VR9500 to the DMM to read current

Connect Ch 1 to the DMM and measure Amps (I) DC

Measure and record amperage (3.55mA + or – 1.66mA = 2.49 – 4.61mA tolerance)

Measure Accelerometer Power Current and record readings for each channel, ensuring that each channel not being measured has a 50Ohm Terminator to prevent any leakage across channels.

 

Run Preliminary Verification (1 year tolerance)

Figure 4. Prelim verification settings

Connect the VR9500 to the PC running VibrationVIEW

Warm up the VR9500 in System Check for 1 hour

Select Configuration > Verification

Select a Device

Select Pre Verification at 1 year tolerances

Select Next

Connect as shown in Figures 5 and 6. See the lesson Create Differential Cables.

Figure 5. Connection diagram

Figure 6. Connection photos

 

Select Next

Figure 7. Verification information form

Enter the appropriate information into the HTML form shown in Figure 7

Select OK

Select Next

The test will begin running

Single ended

Differential and output

After the test has completed

1) Save data as Pre-Verify-S/N-TimeStamp

2) In the Microsoft Word document add as received at 1 year tolerance to the first line

 

Run Full Verification (24 hour tolerance)

Connect the VR9500 to the PC running VibrationVIEW

Select Configuration > Verification

Select a Device

Figure 8. Calibration verification settings

Select Calibration Verification 9500

Select Next

Connect as shown in Figures 5 and 6 above

Select Next

Enter the appropriate information into the HTML form shown in Figure 7

Select OK

Select Next

The test will begin running

Single ended

Differential and output

After the test has completed

1) Save data as Verify-S/N-TimeStamp

2) Select To update last calibration date

3) Select OK

4) Save the calibration certificate

5) Save the completed Checklist for Annual Calibration Verification of a VR9500 (see next lesson)