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Analog channels

Analog channels include Strain Gage Transducers, Inductive Transducers, Piezoresistive Transducers, Potentiometric Transducers, Voltage Sources, Current-fed Piezoelectric Transducers (IEPE, ICP®), Current Sources and Resistance-Based Measurements.

NOTE
MX840B-R temperature channels using a 1-SCM-R-TCK-2 Thermocouple Adapter are included in analog channels.

ClosedGeneric parameters

  • Connector: A unique hardware identifier created by the system. To change the device or connector, select the channel and click Change device.
  • TEDS: For MX module channels with Configuring TEDS sensors connected, an icon is displayed with the TEDS status. Not in edit dialog.
  • SDB: For MX module channels with HBM sensor databases applied, an icon is displayed with the SDB status. Not in edit dialog.
  • Name: The channel name must be unique and contain valid characters (invalid characters are single and double quotes, '\', '@', '#', '&', '<', '>').
  • Description: Enter an optional detailed description of the channel.
  • Collect: Select the Collect checkbox to write the channel data to the SIE data file during a test run.
  • Chart type: Set the default chart type for the channel. Not in edit dialog.
  • Decimals: Set the default decimal places for channel displays.
  • Sample rate: Set the desired channel sample rate. If the sample rate changes, all dependent computed channels and DataModes are changed automatically.
  • Filter type: Set the type of filter for the channel to None, Linear phase (FIR), Butterworth (FIR), Butterworth (IIR) or Bessel (IIR).
  • Filter frequency: Set the frequency of the selected filter. The options vary based on the filter type.
  • Speed mode: For MX411B-R Highly Dynamic Universal Amplifier channels, select Normal or High for the channel speed mode. To successfully run a test, this channel parameter should match the module speed mode.
  • Measurand: Enter an optional measurement type.
  • Reading: Current value of the channel. Show the readings by selecting the desired channels and clicking Live update. Not in edit dialog.
  • Data type: The format of the channel data output. Not in edit dialog.
  • Input mode: Set the analog input mode from the possible transducer types for the module. In the channel edit dialog, a wiring diagram for the selected input mode is available for reference.

NOTE
For piezoresistive bridges, use the standard Bridge full 6 wire input mode.

NOTE
To optimize the scaling accuracy of bridge modes that support Internal shunt resistor scaling, the CX23-R automatically uses the AC Excitation mode and the largest Excitation range available during sensor scaling. If necessary, the excitation mode and range revert to the user-defined values after shunt scaling is completed or canceled and the channel typically requires zeroing.

  • Max electrical: Set the measuring range in mV/V. The available values depend on the module and the Excitation range.

NOTE
For the Input mode Bridge quarter 3 wire (no sense lines), the signal conditioner has an inherent large offset (typically, -2 mV/V for 350 Ω and -6 mV/V for 120 Ω). The CX23-R internally compensates for this offset which significantly reduces the negative limit of the measurement range.
•   For 350 Ω with 5.0 V excitation, the range is reduced from -4 to -2 mV/V.
•   For 350 Ω with 2.5 V excitation, the range is reduced from -8 to -6 mV/V.
•   For 120 Ω with 2.5 V excitation, the range is reduced from -8 to -2 mV/V.
•   For 120 Ω with 1.0 V excitation, the range is reduced from -20 to -18 mV/V.

ClosedScaling parameters

  • Scaling mode: Set the channel scaling mode.
    • Defined slope intercept: Specify the Slope and Intercept of the scaling line.
    • Defined zero span: Specify the Electrical zero of the sensor scaling line. Enter both the Electrical span and the Physical span.
    • Defined two point: Specify the Electrical 1, Physical 1, Electrical 2 and Physical 2 points to define the scaling line.
    • Experimental two point: Use the Experimental two point scaling option to define the two point parameters based on experimental measurements.
    • Internal shunt resistor: Use Internal shunt resistor scaling for modules with a shunt resistor. Specify the Shunt resistor, Shunt polarity and % Dev parameters before starting experimental scaling. To calculate the equivalent Physical span from a known shunt, click Define Known Shunt and enter the known values.
    • Strain gage: Specify the Strain gage factor and Bridge factor.
  • Electrical units: Electrical units of channel input.
  • Units: Physical units of measurement for the channel.
  • Electrical 1: Specify for Defined two point scaling mode. Automatically set after Experimental two point scaling.
  • Physical 1: Specify for Defined two point scaling mode. Automatically set after Experimental two point scaling.
  • Electrical 2: Specify for Defined two point scaling mode. Automatically set after Experimental two point scaling.
  • Physical 2: Specify for Defined two point scaling mode. Automatically set after Experimental two point scaling.
  • Electrical zero: Specify for Defined zero span scaling mode.
  • Electrical span: Specify for Defined zero span scaling mode.
  • Physical span: Specify for Defined zero span scaling mode.
  • Slope: Specify for Defined slope intercept scaling mode.
  • Intercept: Specify for Defined slope intercept scaling mode.
  • Strain gage factor: Specify for Strain gage scaling mode.
  • Bridge factor: Specify for Strain gage scaling mode.
  • Shunt resistor: Specify for Internal shunt resistor scaling mode.
  • Shunt polarity: Specify for Internal shunt resistor scaling mode.
  • % Dev: Specify for Internal shunt resistor scaling mode.
  • Prerun zero mode: Set to Interactive only to allow channel zeroing.
  • Prerun zero offset: Automatically set after zeroing a channel.
  • Prerun zero target: Specify before zeroing a channel.
  • Range min and max: Specify the expected extreme values of the channel. May be any real number.