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.
Generic 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.
- Transducer power: Specify the unregulated transducer power voltage. The value be any real number within hardware limits.
- Bridge ohms: For Strain Gage Transducers, specify the bridge leg resistance in ohms. The value must be 90-5000 Ω. If the type is quarter bridge, the value must be 120 or 350 Ω.
- Leadwire ohms: For Strain Gage Transducers, specify the bridge leadwire resistance in ohms. The value may be any real number greater than or equal to zero.
- Excitation mode: Set the regulated excitation mode to DC or AC.
- Excitation range: Set the regulated excitation voltage range. The available values depend on the module.
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.
Scaling 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.