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vcs:sine [2024/05/23 19:12] – [Test Configuration] dsain_go-ci.comvcs:sine [2024/05/23 19:13] (current) – [Input Channels] dsain_go-ci.com
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 ==== Input Channels ==== ==== Input Channels ====
  
-The input channels will now need to be set up. All sensors will to be properly configured before testing. The **Input Channels** menu can be found through **Setup -> Input Channels**. {{ :vcs:2024-04-30_14-43-17.png?400&nolink }} **Channel Type**\\ **Control** vs. **Monitor**. When running a test, there will need to be at least one control sensor. The control sensor is used to monitor the actual vibration levels that the shaker is producing. It then sends this data to the controller so that it maintains the targeted profile. This sensor should be mounted somewhere on the shaker/slip table itself, not the Device Under Test (DUT). Monitor sensors will show the levels that the DUT itself is experiencing. {{ :vcs:2024-04-30_14-43-59.png?400&nolink }} **Measurement Quantity**\\ Defines the physical unit that will be measured by the sensor connected to the channel. {{ :vcs:2024-04-30_14-44-21.png?200&nolink }} **Sensitivity**\\ Sets the proportionality factor for the measurement (millivolts per engineering unit) given as a parameter of the sensor.\\**Input Mode**\\ There are five modes in which the inputs can operate:+The input channels will now need to be set up. All sensors will to be properly configured before testing. The **Input Channels** menu can be found through **Setup -> Input Channels**. {{ :vcs:2024-04-30_14-43-17.png?400&nolink }} **Channel Type**\\ **Control** vs. **Monitor**. When running a test, there will need to be at least one control sensor. The control sensor is used to monitor the actual vibration levels that the shaker is producing. It then sends this data to the controller so that it maintains the targeted profile. This sensor should be mounted somewhere on the shaker/slip table itself, not the Device Under Test (DUT). Monitor sensors will show the levels that the DUT itself is experiencing.\\ 
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 +**Measurement Quantity**\\ Defines the physical unit that will be measured by the sensor connected to the channel.\\ 
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 +**Sensitivity**\\ Sets the proportionality factor for the measurement (millivolts per engineering unit) given as a parameter of the sensor.\\**Input Mode**\\ There are five modes in which the inputs can operate:
  
 //DC-Differential//- In the DC-Differential mode, neither of the input connections is referenced to the local ground. The input is taken as the potential difference between the two input terminals, and any potential in common with both terminals is canceled out. The Common Mode Voltage (CMV) will be rejected as long as the overall input voltage level does not saturate the input gain stage. Beware that very high CMV will cause clipping and may damage the input circuitry. Signals with a nonzero mean (DC component) can be measured in this mode. //DC-Differential//- In the DC-Differential mode, neither of the input connections is referenced to the local ground. The input is taken as the potential difference between the two input terminals, and any potential in common with both terminals is canceled out. The Common Mode Voltage (CMV) will be rejected as long as the overall input voltage level does not saturate the input gain stage. Beware that very high CMV will cause clipping and may damage the input circuitry. Signals with a nonzero mean (DC component) can be measured in this mode.
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 //IEPE (ICP)//- All Crystal Instruments products support IEPE (Integral Electronic PiezoElectric) constant current output type input channels. IEPE refers to a class of transducers that are packaged with built-in voltage amplifiers powered by a constant current. These circuits are powered by a 4 mA constant current source at roughly 21 Volts. //IEPE (ICP)//- All Crystal Instruments products support IEPE (Integral Electronic PiezoElectric) constant current output type input channels. IEPE refers to a class of transducers that are packaged with built-in voltage amplifiers powered by a constant current. These circuits are powered by a 4 mA constant current source at roughly 21 Volts.
  
-//Charge//- Some sensors provide a high-impedance charge output. Usually, these are high-sensitivity piezoelectric units that lack a built-in voltage mode amplifier (i.e. IEPE), allowing them to be used in high-temperature environments. The Spider-81 front-end module has a built-in charge amplifier that allows the system to read the output of these sensors {{ :vcs:2024-04-30_14-44-49.png?400&nolink }}+//Charge//- Some sensors provide a high-impedance charge output. Usually, these are high-sensitivity piezoelectric units that lack a built-in voltage mode amplifier (i.e. IEPE), allowing them to be used in high-temperature environments. The Spider-81 front-end module has a built-in charge amplifier that allows the system to read the output of these sensors
  
 ==== Running the Test ==== ==== Running the Test ====