AIChannel Properties
- Updated2023-02-21
- 28 minute(s) read
AIChannel Properties
The AIChannel type exposes the following members.
Properties
| Name | Description | |
|---|---|---|
 | AccelerationChargeSensitivity | Specifies the sensitivity of the charge acceleration sensor connected to the channel. This value is the units you specify with AI.Accel.Charge.SensitivityUnits. Refer to the sensor documentation to determine this value. |
| AccelerationChargeSensitivityUnits | Specifies the units of AI.Accel.Charge.Sensitivity. |
| AccelerationDecibelReference | Specifies the decibel reference level in the units of the channel. When you read samples as a waveform, the decibel reference level is included in the waveform attributes. |
| AccelerationFourWireDCVoltageSensitivity | Specifies the sensitivity of the 4 wire DC voltage acceleration sensor connected to the channel. This value is the units you specify with AI.Accel.4WireDCVoltage.SensitivityUnits. Refer to the sensor documentation to determine this value. |
| AccelerationFourWireDCVoltageSensitivityUnits | Specifies the units of AI.Accel.4WireDCVoltage.Sensitivity. |
| AccelerationUnits | Specifies the units to use to return acceleration measurements from the channel. |
| AccelerometerSensitivity | Specifies the sensitivity of the accelerometer. This value is in the units you specify with AccelerometerSensitivityUnits. Refer to the sensor documentation to determine this value. |
| AccelerometerSensitivityUnits | Specifies the units of AccelerometerSensitivity. |
| ACExcitationFrequency | Specifies the AC excitation frequency in Hertz. |
| ACExcitationSyncEnable | Specifies whether to synchronize the AC excitation source of the channel to that of another channel. Synchronize the excitation sources of multiple channels to use multichannel sensors. Set this property to for the master channel and to for the slave channels. |
| ACExcitationWireMode | Specifies the number of leads on the LVDT or RVDT. Some sensors require you to tie leads together to create a four- or five- wire sensor. Refer to the sensor documentation for more information. |
| AdcCustomTimingMode | |
| AdcTimingMode | Specifies the ADC timing mode, controlling the tradeoff between speed and effective resolution. Some ADC timing modes provide increased powerline noise rejection. On devices that have an AI Convert clock, this setting affects both the maximum and default values for AIConvertRate. You must use the same ADC timing mode for all channels on a device, but you can use different ADC timing modes for different devices in the same task. |
| Attenuation | Specifies the amount of attenuation to use. |
| AutoZeroMode | Specifies how often to measure ground. NI-DAQmx subtracts the measured ground voltage from every sample. |
| AveragingWindowSize | Specifies the number of samples to average while acquiring data. Increasing the number of samples to average reduces noise in your measurement. |
| BridgeBalanceCoarsePot | Specifies by how much to compensate for offset in the signal. This value can be between 0 and 127. |
| BridgeBalanceFinePot | Specifies by how much to compensate for offset in the signal. This value can be between 0 and 4095. |
| BridgeConfiguration | Specifies the type of Wheatstone bridge connected to the channel. |
| BridgeElectricalUnits | Specifies from which electrical unit to scale data. Select the same unit that the sensor data sheet or calibration certificate uses for electrical values. |
| BridgeInitialRatio | Specifies in volts per volt the ratio of output voltage from the bridge to excitation voltage supplied to the bridge while not under load. NI-DAQmx subtracts this value from any measurements before applying scaling equations. If you set BridgeInitialVoltage, NI-DAQmx coerces this property to BridgeInitialVoltage divided by ExcitationActualValue. If you set this property, NI-DAQmx coerces BridgeInitialVoltage to the value of this property times ExcitationActualValue. If you set both this property and BridgeInitialVoltage, and their values conflict, NI-DAQmx returns an error. To avoid this error, reset one property to its default value before setting the other. |
| BridgeInitialVoltage | Specifies in volts the output voltage of the bridge while not under load. NI-DAQmx subtracts this value from any measurements before applying scaling equations. If you set BridgeInitialRatio, NI-DAQmx coerces this property to BridgeInitialRatio times ExcitationActualValue. This property is set by DAQmx Perform Bridge Offset Nulling Calibration. If you set this property, NI-DAQmx coerces BridgeInitialRatio to the value of this property divided by ExcitationActualValue. If you set both this property and BridgeInitialRatio, and their values conflict, NI-DAQmx returns an error. To avoid this error, reset one property to its default value before setting the other. |
| BridgeNominalResistance | Specifies in ohms the resistance of the bridge while not under load. |
| BridgePhysicalUnits | Specifies to which physical unit to scale electrical data. Select the same unit that the sensor data sheet or calibration certificate uses for physical values. |
| BridgePolynomialForwardCoefficients | Specifies an array of coefficients for the polynomial that converts electrical values to physical values. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9x^3. |
| BridgePolynomialReverseCoefficients | Specifies an array of coefficients for the polynomial that converts physical values to electrical values. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9x^3. |
| BridgeScaleType | Specifies the scaling type to use when scaling electrical values from the sensor to physical units. |
| BridgeShuntCalibrationAActualResistance | Specifies in ohms the actual value of the internal shunt calibration A resistor. |
| BridgeShuntCalibrationAResistance | Specifies in ohms the desired value of the internal shunt calibration A resistor. |
| BridgeShuntCalibrationASource | Specifies whether to use internal or external shunt when Shunt Cal A is selected. |
| BridgeShuntCalibrationBActualResistance | Specifies in ohms the actual value of the internal shunt calibration B resistor. |
| BridgeShuntCalibrationBResistance | Specifies in ohms the desired value of the internal shunt calibration B resistor. |
| BridgeShuntCalibrationEnable | Specifies whether to enable a shunt calibration switch. Use BridgeShuntCalibrationSelect to select the switch(es) to enable. |
| BridgeShuntCalibrationGainAdjust | Specifies the result of a shunt calibration. This property is set by DAQmx Perform Shunt Calibration. NI-DAQmx multiplies data read from the channel by the value of this property. This value should be close to 1.0. |
| BridgeShuntCalibrationSelect | Specifies which shunt calibration switch(es) to enable. Use BridgeShuntCalibrationEnable to enable the switch(es) you specify with this property. |
| BridgeTableElectricalValues | Specifies the array of electrical values that map to the values in BridgeTablePhysicalValues. Specify this value in the unit indicated by BridgeElectricalUnits. |
| BridgeTablePhysicalValues | Specifies the array of physical values that map to the values in BridgeTableElectricalValues. Specify this value in the unit indicated by BridgePhysicalUnits. |
| BridgeTwoPointLinearFirstElectricalValue | Specifies the first electrical value, corresponding to BridgeTwoPointLinearFirstPhysicalValue. Specify this value in the unit indicated by BridgeElectricalUnits. |
| BridgeTwoPointLinearFirstPhysicalValue | Specifies the first physical value, corresponding to BridgeTwoPointLinearFirstElectricalValue. Specify this value in the unit indicated by BridgePhysicalUnits. |
| BridgeTwoPointLinearSecondElectricalValue | Specifies the second electrical value, corresponding to BridgeTwoPointLinearSecondPhysicalValue. Specify this value in the unit indicated by BridgeElectricalUnits. |
| BridgeTwoPointLinearSecondPhysicalValue | Specifies the second physical value, corresponding to BridgeTwoPointLinearSecondElectricalValue. Specify this value in the unit indicated by BridgePhysicalUnits. |
| BridgeUnits | Specifies in which unit to return voltage ratios from the channel. |
| CalibrationApplyIfExpired | Specifies whether to apply the channel calibration to the channel after the expiration date has passed. |
| CalibrationDate | Gets or sets the last date and time that the channel underwent a channel calibration. |
| CalibrationDescription | Specifies the description entered for the calibration of the channel. |
| CalibrationEnable | Specifies whether to enable the channel calibration associated with the channel. |
| CalibrationExpirationDate | Gets or sets the date and time that the channel calibration expires. |
| CalibrationHasValidInfo | Indicates if the channel has calibration information. |
| CalibrationOperatorName | Specifies the name of the operator who performed the channel calibration. |
| CalibrationPolynomialForwardCoefficients | Specifies the forward polynomial values used for calibrating the channel. |
| CalibrationPolynomialReverseCoefficients | Specifies the reverse polynomial values used for calibrating the channel. |
| CalibrationScaleType | Specifies the method or equation form that the calibration scale uses. |
| CalibrationTablePreScaledValues | Specifies the reference values collected when calibrating the channel. |
| CalibrationTableScaledValues | Specifies the acquired values collected when calibrating the channel. |
| CalibrationVerificationAcquiredValues | Specifies the acquired values collected when verifying the calibration. NI-DAQmx stores these values as a record of calibration accuracy and does not use them in the scaling process. |
| CalibrationVerificationReferenceValues | Specifies the reference values collected when verifying the calibration. NI-DAQmx stores these values as a record of calibration accuracy and does not use them in the scaling process. |
| ChargeUnits | Specifies the units to use to return charge measurements from the channel. |
| ChopEnable | Specifies whether the device will chop its inputs. Chopping removes offset voltages and other low frequency errors. |
| Coupling | Specifies the coupling for the channel. |
| CurrentAcrmsUnits | Specifies the units to use to return current RMS measurements from the channel. |
| CurrentShuntLocation | Specifies the shunt resistor location for current measurements. |
| CurrentShuntResistance | Specifies in ohms the external shunt resistance for current measurements. |
| CurrentUnits | Specifies the units to use to return current measurements from the channel. |
| CustomScaleName | Specifies the name of a custom scale for the channel. |
| DataTransferCustomThreshold | Specifies the number of samples that must be in the FIFO to transfer data from the device if DataTransferRequestCondition is OnBoardMemoryCustomThreshold. |
| DataTransferMaximumRate | Specifies the rate in B/s to transfer data from the device. If this value is not set, then the device will transfer data at a rate based on the bus detected. Modify this value to affect performance under different combinations of operating system, configuration, and device. |
| DataTransferMechanism | Specifies the data transfer mode for the device. |
| DataTransferRequestCondition | Specifies under what condition to transfer data from the onboard memory of the device to the buffer. |
| DCOffset | |
| Description | Specifies a user-defined description for the channel. (Inherited from Channel.) |
| DeviceScalingCoefficients | Indicates the coefficients of a polynomial equation that NI-DAQmx uses to scale values from the native format of the device to volts. Each element of the array corresponds to a term of the equation. For example, if index two of the array is 4, the third term of the equation is 4x^2. Scaling coefficients do not account for any custom scales or sensors contained by the channel. |
| DigitalFilterBandpassCenterFrequency | Specifies the center frequency of the passband for the digital filter. |
| DigitalFilterBandpassWidth | Specifies the width of the passband centered around the center frequency for the digital filter. |
| DigitalFilterCoefficients | Specifies the digital filter coefficients. |
| DigitalFilterEnabled | Specifies whether the digital filter is enabled or disabled. |
| DigitalFilterHighpassCutoffFrequency | Specifies the highpass cutoff frequency of the digital filter. |
| DigitalFilterLowpassCutoffFrequency | Specifies the lowpass cutoff frequency of the digital filter. |
| DigitalFilterNotchCenterFrequency | Specifies the center frequency of the stopband for the digital filter. |
| DigitalFilterNotchWidth | Specifies the width of the stopband centered around the center frequency for the digital filter. |
| DigitalFilterOrder | Specifies the order of the digital filter. |
| DigitalFilterResponse | Specifies the digital filter response. |
| DigitalFilterType | Specifies the digital filter type. |
| DitherEnable | Specifies whether to enable dithering. Dithering adds Gaussian noise to the input signal. You can use dithering to achieve higher resolution measurements by over sampling the input signal and averaging the results. |
| EddyCurrentProximityProbeSensitivity | Specifies the sensitivity of the eddy current proximity probe . This value is in the units you specify with EddyCurrentProximityProbeSensitivityUnits. Refer to the sensor documentation to determine this value. |
| EddyCurrentProximityProbeSensitivityUnits | Specifies the units of EddyCurrentProximityProbeSensitivity. |
| EddyCurrentProximityProbeUnits | Specifies the units to use to return proximity measurements from the channel. |
| EnhancedAliasRejectionEnable | Specifies whether to enable enhanced alias rejection. Leave this property set to the default value for most applications. |
| ExcitationActualValue | Specifies the actual amount of excitation supplied by an internal excitation source. If you read an internal excitation source more precisely with an external device, set this property to the value you read. NI-DAQmx ignores this value for external excitation. When performing shunt calibration, some devices set this property automatically. |
| ExcitationDCOrAC | Specifies if the excitation supply is DC or AC. |
| ExcitationIdleOutputBehavior | Specifies whether this channel will disable excitation after the task is uncommitted. Setting this to Zero Volts or Amps disables excitation after task uncommit. Setting this attribute to Maintain Existing Value leaves the excitation on after task uncommit. |
| ExcitationSense | Specifies whether to use local or remote sense to sense excitation. |
| ExcitationSource | Specifies the source of excitation. |
| ExcitationValue | Specifies the amount of excitation that the sensor requires. If ExcitationVoltageOrCurrent is Voltage, this value is in volts. If ExcitationVoltageOrCurrent is Current, this value is in amperes. |
| ExcitationVoltageOrCurrent | Specifies if the channel uses current or voltage excitation. |
| FilterDelay | Indicates the amount of time between when the ADC samples data and when the sample is read by the host device. This value is in the units you specify with FilterDelayUnits. You can adjust this amount of time using FilterDelayAdjustment. |
| FilterDelayAdjustment | Specifies the amount of filter delay that gets removed if RemoveFilterDelay is enabled. This delay adjustment is in addition to the value indicated by FilterDelay. This delay adjustment is in the units you specify with FilterDelayUnits. |
| FilterDelayUnits | Specifies the units of FilterDelay and FilterDelayAdjustment. |
| FilterEnabled | Specifies the corresponding filter enable/disable state. |
| FilterFrequency | Specifies the corresponding filter frequency (cutoff or center) of the filter response. |
| FilterOrder | Specifies the corresponding filter order and defines the slope of the filter response. |
| FilterResponse | Specifies the corresponding filter response and defines the shape of the filter response. |
| ForceIepeSensorSensitivity | Specifies the sensitivity of the IEPE force sensor connected to the channel. Specify this value in the unit indicated by ForceIepeSensorSensitivityUnits. |
| ForceIepeSensorSensitivityUnits | Specifies the units for ForceIepeSensorSensitivity. |
| ForceReadFromChannel | Specifies whether to read from the channel if it is a cold-junction compensation channel. By default, reading from the task does not return data from cold-junction compensation channels. Setting this property to forces read operations to return the cold-junction compensation channel data with the other channels in the task. |
| ForceReadFromStrainChannel | Specifies whether the data is returned by reading from the task when set on a raw strain channel that is part of a rosette configuration. |
| ForceUnits | Specifies in which unit to return force or load measurements from the channel. |
| FrequencyHysteresis | Specifies in volts a window below FrequencyThresholdVoltage. The input voltage must pass below FrequencyThresholdVoltage minus this value before NI-DAQmx recognizes a waveform repetition at FrequencyThresholdVoltage. Hysteresis can improve the measurement accuracy when the signal contains noise or jitter. |
| FrequencyThresholdVoltage | Specifies the voltage level at which to recognize waveform repetitions. You should select a voltage level that occurs only once within the entire period of a waveform. You also can select a voltage that occurs only once while the voltage rises or falls. |
| FrequencyUnits | Specifies the units to use to return frequency measurements from the channel. |
| Gain | Specifies a gain factor to apply to the channel. |
| Impedance | Specifies the input impedance of the channel. |
| InputLimitsFaultDetectEnable | Specifies whether to enable input limits fault detection. |
| InputLimitsFaultDetectLowerLimit | Specifies the level of the lower limit for input limits detection. An input sample outside the upper and lower bounds causes a fault. Note: Fault detection applies to both positive and negative inputs. For instance, if you specify a lower limit of 2 mA and an upper limit of 12 mA, NI-DAQmx detects a fault at 15 mA and -15 mA, but not at -6 mA because it is in the range of -12 mA to -2 mA. |
| InputLimitsFaultDetectUpperLimit | Specifies the level of the upper limit for input limits detection. An input sample outside the upper and lower bounds causes a fault. Note: Fault detection applies to both positive and negative inputs. For instance, if you specify a lower limit of 2 mA and an upper limit of 12 mA, NI-DAQmx detects a fault at 15 mA and -15 mA, but not at -6 mA because it is in the range of -12 mA to -2 mA. |
| InputSource | Specifies the source of the channel. You can use the signal from the I/O connector or one of several calibration signals. Certain devices have a single calibration signal bus. For these devices, you must specify the same calibration signal for all channels you connect to a calibration signal. |
| IsGlobal | Indicates whether the channel is a global channel. (Inherited from Channel.) |
| IsTeds | Indicates if the virtual channel was initialized using a TEDS bitstream from the corresponding physical channel. |
| LeadWireResistance | Specifies in ohms the resistance of the wires that lead to the sensor. |
| LossyLsbRemovalCompressedSampleSize | Specifies the number of bits to return in a raw sample when RawDataCompressionType is set to LossyLsbRemoval. |
| LowpassCutoffFrequency | Specifies the frequency in Hertz that corresponds to the -3dB cutoff of the filter. |
| LowpassEnable | Specifies whether to enable the lowpass filter of the channel. |
| LowpassSwitchedCapacitorClockSource | Specifies the source of the filter clock. If you need a higher resolution for the filter, you can supply an external clock to increase the resolution. Refer to the SCXI-1141/1142/1143 User Manual for more information. |
| LowpassSwitchedCapacitorExternalClockDivisor | Specifies the divisor for the external clock when you set LowpassSwitchedCapacitorClockSource to External. On the SCXI-1141, SCXI-1142, and SCXI-1143, NI-DAQmx determines the filter cutoff by using the equation f/(100*n), where f is the external frequency, and n is the external clock divisor. Refer to the SCXI-1141/1142/1143 User Manual for more information. |
| LowpassSwitchedCapacitorExternalClockFrequency | Specifies the frequency of the external clock when you set LowpassSwitchedCapacitorClockSource to External. NI-DAQmx uses this frequency to set the pre- and post- filters on the SCXI-1141, SCXI-1142, and SCXI-1143. On those devices, NI-DAQmx determines the filter cutoff by using the equation f/(100*n), where f is the external frequency, and n is the external clock divisor. Refer to the SCXI-1141/1142/1143 User Manual for more information. |
| LowpassSwitchedCapacitorOutputClockDivisor | Specifies the divisor for the output clock. NI-DAQmx uses the cutoff frequency to determine the output clock frequency. Refer to the SCXI-1141/1142/1143 User Manual for more information. |
| LvdtSensitivity | Specifies the sensitivity of the LVDT. This value is in the units you specify with LvdtSensitivityUnits. Refer to the sensor documentation to determine this value. |
| LvdtSensitivityUnits | Specifies the units of LvdtSensitivity. |
| LvdtUnits | Specifies the units to use to return linear position measurements from the channel. |
| Maximum | Specifies the maximum value you expect to measure. This value is in the units you specify with a units property. When you query this property, it returns the coerced maximum value that the device can measure with the current settings. |
| MaximumSoundPressureLevel | |
| MeasurementType | Indicates the measurement to take with the analog input channel and in some cases, such as for temperature measurements, the sensor to use. |
| MemoryMappingEnable | Specifies for NI-DAQmx to map hardware registers to the memory space of the application, if possible. Normally, NI-DAQmx maps hardware registers to memory accessible only to the kernel. Mapping the registers to the memory space of the application increases performance. However, if the application accesses the memory space mapped to the registers, it can adversely affect the operation of the device and possibly result in a system crash. |
| MicrophoneSensitivity | Specifies the sensitivity of the microphone. This value is in mV/Pa. Refer to the sensor documentation to determine this value. |
| Minimum | Specifies the minimum value you expect to measure. This value is in the units you specify with a units property. When you query this property, it returns the coerced minimum value that the device can measure with the current settings. |
| OpenChannelDetectEnable | Specifies whether to enable open channel detection. |
| OpenThermocoupleDetectEnable | Specifies whether to apply the open thermocouple detection bias voltage to the channel. Changing the value of this property on a channel may require settling time before the data returned is valid. To compensate for this settling time, discard unsettled data or add a delay between committing and starting the task. Refer to your device specifications for the required settling time. When open thermocouple detection is enabled, use OpenThermocoupleChannelsExist to determine if any channels were open. |
| OvercurrentDetectEnable | Specifies whether to enable overcurrent detection. |
| PhysicalName | Specifies the name of the physical channel upon which this virtual channel is based. (Inherited from Channel.) |
| PowerSupplyFaultDetectEnable | Specifies whether to enable power supply fault detection. |
| PressureUnits | Specifies in which unit to return pressure measurements from the channel. |
| ProbeAttenuation | Specifies the amount of attenuation provided by the probe connected to the channel. Specify this attenuation as a ratio. |
| RangeHigh | Specifies the upper limit of the input range of the device. This value is in the native units of the device. On E Series devices, for example, the native units is volts. |
| RangeLow | Specifies the lower limit of the input range of the device. This value is in the native units of the device. On E Series devices, for example, the native units is volts. |
| RawDataCompressionType | Specifies the type of compression to apply to raw samples returned from the device. |
| RawSampleJustification | Indicates the justification of a raw sample from the device. |
| RawSampleSize | Indicates in bits the size of a raw sample from the device. |
| ReadOpenChannels | Indicates a list of names of any open virtual channels. You must read ReadOpenChannelsExist before you read this property. Otherwise you will receive an error. |
| ReadOpenChannelsDetails | Indicates a list of details of any open virtual channels. You must read ReadOpenChannelsExist before you read this property. Otherwise you will receive an error. |
| ReadOpenChannelsExist | Indicates if the device or devices detected an open channel condition in any virtual channel in the task. Reading this property clears the open channel status for all channels in this task. You must read this property before you read ReadOpenChannels. Otherwise, you will receive an error. |
| RemoveFilterDelay | Specifies if filter delay removal is enabled on the device. |
| ResistanceConfiguration | Specifies the resistance configuration for the channel. NI-DAQmx uses this value for any resistance-based measurements, including temperature measurement using a thermistor or RTD. |
| ResistanceUnits | Specifies the units to use to return resistance measurements. |
| Resolution | Indicates the resolution of the analog-to-digital converter of the channel. This value is in the units you specify with ResolutionUnits. |
| ResolutionUnits | Indicates the units of Resolution. |
| RosetteMeasurementType | Specifies the type of rosette measurement. |
| RosetteStrainChannels | Indicates the raw strain channels that comprise the strain rosette. |
| RosetteStrainGageOrientation | Specifies gage orientation in degrees with respect to the X axis. |
| RosetteType | Indicates the type of rosette gage. |
| RtdA | Specifies the 'A' constant of the Callendar-Van Dusen equation. NI-DAQmx requires this value when you use a custom RTD. |
| RtdB | Specifies the 'B' constant of the Callendar-Van Dusen equation. NI-DAQmx requires this value when you use a custom RTD. |
| RtdC | Specifies the 'C' constant of the Callendar-Van Dusen equation. NI-DAQmx requires this value when you use a custom RTD. |
| RtdR0 | Specifies in ohms the sensor resistance at 0 deg C. The Callendar-Van Dusen equation requires this value. Refer to the sensor documentation to determine this value. |
| RtdType | Specifies the type of RTD connected to the channel. |
| RvdtSensitivity | Specifies the sensitivity of the RVDT. This value is in the units you specify with RvdtSensitivityUnits. Refer to the sensor documentation to determine this value. |
| RvdtSensitivityUnits | Specifies the units of RvdtSensitivity. |
| RvdtUnits | Specifies the units to use to return angular position measurements from the channel. |
| SampleAndHoldEnable | Specifies whether to enable the sample and hold circuitry of the device. When you disable sample and hold circuitry, a small voltage offset might be introduced into the signal. You can eliminate this offset by using AutoZeroMode to perform an auto zero on the channel. |
| SensorPowerConfiguration | Specifies whether to turn on the sensor's power supply or to leave the configuration unchanged. |
| SensorPowerType | Specifies the type of power supplied to the sensor. |
| SensorPowerVoltage | Specifies the voltage level for the sensor's power supply. |
| SoundPressureDecibelReference | Specifies the decibel reference level in the units of the channel. When you read samples as a waveform, the decibel reference level is included in the waveform attributes. NI-DAQmx also uses the decibel reference level when converting MaximumSoundPressureLevel to a voltage level. |
| SoundPressureUnits | Specifies the units to use to return sound pressure measurements from the channel. |
| StrainGageConfiguration | Specifies the bridge configuration of the strain gages. |
| StrainGageGageFactor | Specifies the sensitivity of the strain gage. Gage factor relates the change in electrical resistance to the change in strain. Refer to the sensor documentation for this value. |
| StrainGagePoissonRatio | Specifies the ratio of lateral strain to axial strain in the material you are measuring. |
| StrainUnits | Specifies the units to use to return strain measurements from the channel. |
| SynchronizationUnlockBehavior | Specifies the action to take if the target loses its synchronization to the grand master. (Inherited from Channel.) |
| TedsUnits | Indicates the units defined by TEDS information associated with the channel. |
| TemperatureUnits | Specifies the units to use to return temperature measurements from the channel. |
| TerminalConfiguration | Specifies the terminal configuration for the channel. |
| ThermistorA | Specifies the 'A' constant of the Steinhart-Hart thermistor equation. |
| ThermistorB | Specifies the 'B' constant of the Steinhart-Hart thermistor equation. |
| ThermistorC | Specifies the 'C' constant of the Steinhart-Hart thermistor equation. |
| ThermistorR1 | Specifies in ohms the value of the reference resistor for the thermistor if you use voltage excitation. NI-DAQmx ignores this value for current excitation. |
| ThermocoupleCjcChannel | Indicates the channel that acquires the temperature of the cold junction if ThermocoupleCjcSource is Channel. If the channel is a temperature channel, NI-DAQmx acquires the temperature in the correct units. Other channel types, such as a resistance channel with a custom sensor, must use a custom scale to scale values to degrees Celsius. |
| ThermocoupleCjcSource | Indicates the source of cold-junction compensation. |
| ThermocoupleCjcValue | Specifies the temperature of the cold junction if ThermocoupleCjcSource is ConstantValue. Specify this value in the units of the measurement. |
| ThermocoupleLeadOffsetVoltage | Specifies the lead offset nulling voltage to subtract from measurements on a device. This property is ignored if open thermocouple detection is disabled. |
| ThermocoupleScaleType | Specifies the method or equation form that the thermocouple scale uses. |
| ThermocoupleType | Specifies the type of thermocouple connected to the channel. Thermocouple types differ in composition and measurement range. |
| TorqueUnits | Specifies in which unit to return torque measurements from the channel. |
| Type | Indicates the type of the virtual channel. (Inherited from Channel.) |
| UsbTransferRequestCount | Specifies the maximum number of simultaneous USB transfers used to stream data. Modify this value to affect performance under different combinations of operating system and device. |
| UsbTransferRequestSize | Specifies the maximum size of a USB transfer request in bytes. Modify this value to affect performance under different combinations of operating system and device. |
| UseExcitationForScaling | |
| UseMultiplexedExcitation | Specifies if the SCXI-1122 multiplexes the excitation to the upper half of the channels as it advances through the scan list. |
| VelocityIepeSensorDecibelReference | Specifies the decibel reference level in the units of the channel. When you read samples as a waveform, the decibel reference level is included in the waveform attributes. |
| VelocityIepeSensorSensitivity | Specifies the sensitivity of the IEPE velocity sensor connected to the channel. Specify this value in the unit indicated by VelocityIepeSensorSensitivityUnits. |
| VelocityIepeSensorSensitivityUnits | Specifies the units for VelocityIepeSensorSensitivity. |
| VelocityUnits | Specifies in which unit to return velocity measurements from the channel. |
| VirtualName | Gets the name of the virtual channel. (Inherited from Channel.) |
| VoltageAcrmsUnits | Specifies the units to use to return voltage RMS measurements from the channel. |
| VoltageDecibelReference | Specifies the decibel reference level in the units of the channel. When you read samples as a waveform, the decibel reference level is included in the waveform attributes. |
| VoltageUnits | Specifies the units to use to return voltage measurements from the channel. |