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
- Connection: A unique hardware identifier created by the system.
- TEDS: For MX module channels with TEDS sensors connected, an icon is displayed with the TEDS status. Not in edit dialog. See Configuring TEDS sensors for more information.
- SDB: For MX module channels with HBM sensor databases applied, an icon is displayed with the SDB status. Not in edit dialog.
- Reading: Current value of the channel. Show the readings by selecting the desired channels and clicking
Live update. Not in edit dialog.
- Units: The reading unit description shows in this column.
- Name: The channel name must be unique and contain valid characters (invalid characters are single and double quotes, '\', '@', '#', '&', '<' and '>'). Invalid channel names are 'true' and 'false' (case sensitive).
- 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 Module 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.
- Data type: The format of the channel data output (read only).
- 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 applicable strain gage bridge sensors, specify the bridge lead wire resistance in ohms. The value may be any real number greater than or equal to zero.
NOTE
This parameter is not applicable to bridge sensors configured and wired to use excitation sense lines. Use of these sense lines automatically compensates for lead wire resistance effects.
- 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 unit 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.
- SSI coding: For Digital inputs > Absolute value encoder (SSI protocol) inputs, set the SSI encoder protocol mode to Gray or Binary.
- SSI clock: For Digital inputs > Absolute value encoder (SSI protocol) inputs, set the SSI encoder clock frequency in kHz.
- SSI bits: For Digital inputs > Absolute value encoder (SSI protocol) inputs, specify the SSI bit resolution as an integer between 12 and 30.
- Quadrature: For Digital inputs > Incremental encoder inputs, set to True to count in quadrature.
- Encoder index reset: For encoder counter inputs, set to True for inputs with a zeroing (reference) pulse.
- Encoder index divisor: For encoder counter inputs with a zeroing pulse, set the index divisor.
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. Values may be set as positive or negative numbers.
- Warning and Alarm min and max: Specify the desired values for warning and alarm thresholds.