NI DMM Configuration Attributes - ni/grpc-device GitHub Wiki
- NIDMM_ATTRIBUTE_RESOLUTION_ABSOLUTE
- NIDMM_ATTRIBUTE_APERTURE_TIME
- NIDMM_ATTRIBUTE_APERTURE_TIME_UNITS
- NIDMM_ATTRIBUTE_NUMBER_OF_AVERAGES
- NIDMM_ATTRIBUTE_OPERATION_MODE
- NIDMM_ATTRIBUTE_SETTLE_TIME
- NIDMM_ATTRIBUTE_AUTO_RANGE_VALUE
- NIDMM_ATTRIBUTE_RESOLUTION_DIGITS
- NIDMM_ATTRIBUTE_FUNCTION
- NIDMM_ATTRIBUTE_ADC_CALIBRATION
- NIDMM_ATTRIBUTE_AUTO_ZERO
- NIDMM_ATTRIBUTE_DC_BIAS
- NIDMM_ATTRIBUTE_LC_CALCULATION_MODEL
- NIDMM_ATTRIBUTE_CABLE_COMP_TYPE
- NIDMM_ATTRIBUTE_OPEN_CABLE_COMP_CONDUCTANCE
- NIDMM_ATTRIBUTE_OPEN_CABLE_COMP_SUSCEPTANCE
- NIDMM_ATTRIBUTE_LC_NUMBER_MEAS_TO_AVERAGE
- NIDMM_ATTRIBUTE_SHORT_CABLE_COMP_REACTANCE
- NIDMM_ATTRIBUTE_SHORT_CABLE_COMP_RESISTANCE
- NIDMM_ATTRIBUTE_CURRENT_SOURCE
- NIDMM_ATTRIBUTE_DC_NOISE_REJECTION
- NIDMM_ATTRIBUTE_FREQ_VOLTAGE_AUTO_RANGE
- NIDMM_ATTRIBUTE_FREQ_VOLTAGE_RANGE
- NIDMM_ATTRIBUTE_INPUT_RESISTANCE
- NIDMM_ATTRIBUTE_AC_MAX_FREQ
- NIDMM_ATTRIBUTE_AC_MIN_FREQ
- NIDMM_ATTRIBUTE_OFFSET_COMP_OHMS
- NIDMM_ATTRIBUTE_POWERLINE_FREQ
- NIDMM_ATTRIBUTE_SHUNT_VALUE
- NIDMM_ATTRIBUTE_TEMP_RTD_A
- NIDMM_ATTRIBUTE_TEMP_RTD_B
- NIDMM_ATTRIBUTE_TEMP_RTD_C
- NIDMM_ATTRIBUTE_TEMP_RTD_RES
- NIDMM_ATTRIBUTE_TEMP_RTD_TYPE
- NIDMM_ATTRIBUTE_TEMP_TC_FIXED_REF_JUNC
- NIDMM_ATTRIBUTE_TEMP_TC_REF_JUNC_TYPE
- NIDMM_ATTRIBUTE_TEMP_TC_TYPE
- NIDMM_ATTRIBUTE_TEMP_THERMISTOR_A
- NIDMM_ATTRIBUTE_TEMP_THERMISTOR_B
- NIDMM_ATTRIBUTE_TEMP_THERMISTOR_C
- NIDMM_ATTRIBUTE_TEMP_THERMISTOR_TYPE
- NIDMM_ATTRIBUTE_TEMP_TRANSDUCER_TYPE
- NIDMM_ATTRIBUTE_RANGE
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViReal64 | R/W | None | niDMM_ConfigureMeasurementDigits niDMM_ConfigureMeasurementAbsolute |
Specifies the measurement resolution in absolute units. Setting this attribute to higher values increases the measurement accuracy. Setting this attribute to lower values increases the measurement speed.
Note NI-DMM ignores this attribute for capacitance and inductance measurements on the NI 4082 and NI 4072. To achieve better resolution for such measurements, use the NIDMM_ATTRIBUTE_LC_NUMBER_MEAS_TO_AVERAGE attribute
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViReal64 | R/W | Yes | niDMM_GetApertureTimeInfo |
Specifies the measurement aperture time for the current configuration. Aperture time is specified in units set by NIDMM_ATTRIBUTE_APERTURE_TIME_UNITS. To override the default aperture, set this attribute to the desired aperture time after calling niDMM_ConfigureMeasurementDigits. To return to the default, set this attribute to NIDMM_VAL_APERTURE_TIME_AUTO (-1).
Any number of powerline cycles (PLCs) within the minimum and maximum ranges is allowed on the NI 4080/4081/4082 and NI 4070/4071/4072.
On the NI 4065, the minimum aperture time is 333 µs, and the maximum aperture time is 78.2 s. If setting the number of averages directly, the total measurement time is aperture time X the number of averages, which must be less than 72.8 s. The aperture times allowed are 333 µs, 667 µs, or multiples of 1.11 ms—for example 1.11 ms, 2.22 ms, 3.33 ms, and so on. If you set an aperture time other than 333 µs, 667 µs, or multiples of 1.11 ms, the value will be coerced up to the next supported aperture time.
On the NI 4060, when the powerline frequency is 60 Hz, the PLCs allowed are 1 PLC, 6 PLC, 12 PLC, and 120 PLC. When the powerline frequency is 50 Hz, the PLCs allowed are 1 PLC, 5 PLC, 10 PLC, and 100 PLC.
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViInt32 | R/W | None | niDMM_GetApertureTimeInfo |
Specifies the units of aperture time for the current configuration.
Note The NI 4060 does not support an aperture time set in seconds
NIDMM_VAL_SECONDS | 0 | Seconds |
---|---|---|
NIDMM_VAL_POWER_LINE_CYCLES | 1 | Powerline Cycles |
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViInt32 | R/W | None | None |
Specifies the number of averages to perform in a measurement. For the NI 4080/4081/4082 and NI 4070/4071/4072, applies only when the aperture time is not set to AUTO and Auto Zero is ON. The default is 1.
Note The NI 4050 and NI 4060 are not supported
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViInt32 | R/W | None | None |
Specifies how the DMM acquires data.
When you call niDMM_ConfigureMeasurementDigits, NI-DMM sets this attribute to NIDMM_VAL_IVIDMM_MODE. When you call niDMM_ConfigureWaveformAcquisition, NI-DMM sets this attribute to NIDMM_VAL_WAVEFORM_MODE. If you are programming attributes directly, you must set this attribute before setting other configuration attributes.
Note The NI 4050 and NI 4060 are not supported
NIDMM_VAL_IVIDMM_MODE | Single or multipoint measurements—when the NIDMM_ATTRIBUTE_TRIGGER_COUNT and NIDMM_ATTRIBUTE_SAMPLE_COUNT attributes are both set to 1, the NI 4065 and NI 4070/4071/4072 take a single-point measurement; otherwise, NI-DMM takes multipoint measurements. |
---|---|
NIDMM_VAL_WAVEFORM_MODE | Waveform Mode configures the NI 4070/4071/4072 to take waveform measurements. |
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViReal64 | R/W | None | None |
Specifies the settling time in seconds. To override the default settling time, set this attribute. To return to the default, set this attribute to NIDMM_VAL_SETTLE_TIME_AUTO (-1).
Note The NI 4050 and NI 4060 are not supported
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViReal64 | RO | None | niDMM_GetAutoRangeValue |
Specifies the value of the range. If auto ranging is enabled, shows the actual value of the active range. The value of this attribute is set during a read operation.
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViReal64 | R/W | None | niDMM_ConfigureMeasurementDigits niDMM_ConfigureMeasurementAbsolute |
Specifies the measurement resolution in digits. Setting this attribute to higher values increases the measurement accuracy. Setting this attribute to lower values increases the measurement speed.
Note NI-DMM ignores this attribute for capacitance and inductance measurements on the NI 4082 and NI 4072. To achieve better resolution for such measurements, use the NIDMM_ATTRIBUTE_LC_NUMBER_MEAS_TO_AVERAGE attribute
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViInt32 | R/W | None | niDMM_ConfigureMeasurementDigits niDMM_ConfigureWaveformAcquisition |
Specifies the measurement function.
Note If you are setting this attribute directly, you must also set the NIDMM_ATTRIBUTE_OPERATION_MODE attribute, which controls whether the DMM takes standard single or multipoint measurements, or acquires a waveform. If you are programming attributes directly, you must set the NIDMM_ATTRIBUTE_OPERATION_MODE attribute before setting other configuration attributes. If the NIDMM_ATTRIBUTE_OPERATION_MODE attribute is set to NIDMM_VAL_WAVEFORM_MODE, the only valid function types are NIDMM_VAL_WAVEFORM_VOLTAGE and NIDMM_VAL_WAVEFORM_CURRENT. Set the NIDMM_ATTRIBUTE_OPERATION_MODE attribute to NIDMM_VAL_IVIDMM_MODE to set all other function values
Name | Default Value | Description | Devices supported |
---|---|---|---|
NIDMM_VAL_DC_VOLTS | 1 | DC Voltage | All |
NIDMM_VAL_AC_VOLTS | 2 | AC Voltage with AC Coupling | All |
NIDMM_VAL_DC_CURRENT | 3 | DC Current | All |
NIDMM_VAL_AC_CURRENT | 4 | AC Current | All |
NIDMM_VAL_2_WIRE_RES | 5 | 2-Wire Resistance | All |
NIDMM_VAL_4_WIRE_RES | 101 | 4-Wire Resistance | NI 4060, NI 4065, NI 4070/4071/4072, NI 4080/4081/4082 |
NIDMM_VAL_FREQ | 104 | Frequency | NI 4070/4071/4072 and NI 4080/4081/4082 |
NIDMM_VAL_PERIOD | 105 | Period | NI 4070/4071/4072 and NI 4080/4081/4082 |
NIDMM_VAL_AC_VOLTS_DC_COUPLED | 1001 | AC Voltage with DC Coupling | NI 4070/4071/4072 and NI 4080/4081/4082 |
NIDMM_VAL_DIODE | 1002 | Diode | All |
NIDMM_VAL_WAVEFORM_VOLTAGE | 1003 | Waveform Voltage | NI 4070/4071/4072 and NI 4080/4081/4082 |
NIDMM_VAL_WAVEFORM_CURRENT | 1004 | Waveform Current | NI 4070/4071/4072 and NI 4080/4081/4082 |
NIDMM_VAL_CAPACITANCE | 1005 | Capacitance | NI 4072 and NI 4082 |
NIDMM_VAL_INDUCTANCE | 1006 | Inductance | NI 4072 and NI 4082 |
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViInt32 | R/W | None | niDMM_ConfigureADCCalibration |
For the NI 4080/4081/4082 and the NI 4070/4071/4072, specifies the ADC calibration mode.
NIDMM_VAL_ADC_CALIBRATION_AUTO (default) | -1.0 | The DMM enables or disables ADC calibration based on the configured function and resolution. |
---|---|---|
NIDMM_VAL_ADC_CALIBRATION_OFF | 0 | The DMM does not compensate for changes to the gain. |
NIDMM_VAL_ADC_CALIBRATION_ON | 1 | The DMM measures an internal reference to calculate the correct gain for the measurement. |
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViInt32 | R/W | None | niDMM_ConfigureAutoZeroMode |
Specifies the Auto Zero mode.
NIDMM_VAL_AUTO_ZERO_AUTO (default) | -1 | NI-DMM chooses the Auto Zero setting based on the configured function and resolution. |
---|---|---|
NIDMM_VAL_AUTO_ZERO_OFF | 0 | Disables Auto Zero. |
Note The NI 4065 does not support this setting
Defined Values | ||
---|---|---|
NIDMM_VAL_AUTO_ZERO_ON | 1 | The DMM internally disconnects the input signal following each measurement and takes a zero reading. It then subtracts the zero reading from the preceding reading. |
Note For NI 4065 devices, Auto Zero is always ON. Auto Zero is an integral part of the signal measurement phase and adds no extra time to the overall measurement
Defined Values | ||
---|---|---|
NIDMM_VAL_AUTO_ZERO_ONCE | 2 | The DMM internally disconnects the input signal following each measurement and takes a zero reading. It then subtracts the zero reading from the preceding reading. |
Note The NI 4060/4065 does not support this setting
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViInt32 | R/W | None | None |
For the NI 4082 and NI 4072 only, controls the available DC bias for capacitance measurements.
NIDMM_VAL_DC_BIAS_OFF | 0 | NI-DMM programs the device not to use the DC bias. |
---|---|---|
NIDMM_VAL_DC_BIAS_ON | 1 | NI-DMM programs the device to use the DC bias. |
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViInt32 | R/W | None | None |
For the NI 4082 and NI 4072 only, specifies the type of algorithm that the measurement processing uses for capacitance and inductance measurements.
NIDMM_VAL_CALC_MODEL_AUTO | -1 | NI-DMM chooses the algorithm based on function and range. |
---|---|---|
NIDMM_VAL_CALC_MODEL_SERIES | 0 | NI-DMM uses the series impedance model to calculate capacitance and inductance. |
NIDMM_VAL_CALC_MODEL_PARALLEL | 1 | NI-DMM uses the parallel admittance model to calculate capacitance and inductance. |
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViInt32 | R/W | None | niDMM_ConfigureCableCompType |
For the NI 4082 and NI 4072 only, specifies the type of cable compensation that is applied to the current capacitance or inductance measurement for the current range.
Note Changing the function or the range through this attribute or through niDMM_ConfigureMeasurementDigits resets the value of this attribute to the default value
NIDMM_VAL_CABLE_COMP_NONE (default) | 0 | No Cable Compensation |
---|---|---|
NIDMM_VAL_CABLE_COMP_OPEN | 1 | Open Cable Compensation |
NIDMM_VAL_CABLE_COMP_SHORT | 2 | Short Cable Compensation |
NIDMM_VAL_CABLE_COMP_OPEN_AND_SHORT | 3 | Open and Short Cable Compensation |
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViReal64 | R/W | None | niDMM_ConfigureOpenCableCompValues |
For the NI 4082 and NI 4072 only, specifies the active part (conductance) of the open cable compensation. The valid range is any real number >0. The default value (-1.0) indicates that compensation has not taken place.
Note Changing the function or the range through this attribute or through niDMM_ConfigureMeasurementDigits resets the value of this attribute to the default value
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViInt32 | R/W | None | niDMM_ConfigureOpenCableCompValues |
For the NI 4082 and NI 4072 only, specifies the reactive part (susceptance) of the open cable compensation. The valid range is any real number >0. The default value (-1.0) indicates that compensation has not taken place.
Note Changing the function or the range through this attribute or through niDMM_ConfigureMeasurementDigits resets the value of this attribute to the default value
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViInt32 | R/W | None | None |
For the NI 4082 and NI 4072 only, specifies the number of LC measurements that are averaged to produce one reading.
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViInt32 | R/W | None | niDMM_ConfigureShortCableCompValues |
For the NI 4082 and NI 4072 only, represents the reactive part (reactance) of the short cable compensation. The valid range is any real number >0. The default value (-1) indicates that compensation has not taken place.
Note Changing the function or the range through this attribute or through niDMM_ConfigureMeasurementDigits resets the value of this attribute to the default value
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViInt32 | R/W | None | [ConfigureShortCableCompValues |
For the NI 4082 and NI 4072 only, represents the active part (resistance) of the short cable compensation. The valid range is any real number >0. The default value (-1) indicates that compensation has not taken place.
Note Changing the function or the range through this attribute or through niDMM_ConfigureMeasurementDigits resets the value of this attribute to the default value
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViReal64 | R/W | None | niDMM_ConfigureCurrentSource |
Specifies the current source provided during diode measurements.
Note The NI 4050 and NI 4060 are not supported
NIDMM_VAL_1_MICROAMP | 1 µA | NI 4080/4081/4082 and NI 4070/4071/4072 only | 0.000001 |
---|---|---|---|
NIDMM_VAL_10_MICROAMP | 10 µA | NI 4080/4081/4082 and NI 4070/4071/4072 only | 0.00001 |
NIDMM_VAL_100_MICROAMP | 100 µA | NI 4080/4081/4082, NI 4070/4071/4072, and NI 4065 | 0.0001 |
NIDMM_VAL_1_MILLIAMP (default) | 1 mA | NI 4080/4081/4082, NI 4070/4071/4072, and NI 4065 | 0.001 |
Note These defined values are currently not supported for gRPC, instead pass the raw values specified alongside, directly.
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViInt32 | R/W | None | None |
Specifies the DC noise rejection mode.
Note The NI 4050 and NI 4060 are not supported
NIDMM_VAL_DCNR_AUTO | -1 | The driver chooses the DC noise rejection setting based on the configured function and resolution. |
---|---|---|
NIDMM_VAL_DCNR_NORMAL | 0 | NI-DMM weighs all samples equally. |
NIDMM_VAL_DCNR_SECOND_ORDER | 1 | NI-DMM weighs the samples taken in the middle of the aperture time more than samples taken at the beginning and the end of the measurement using a triangular weighing function. |
NIDMM_VAL_DCNR_HIGH_ORDER | 2 | NI-DMM weighs the samples taken in the middle of the aperture time more than samples taken at the beginning and the end of the measurement using a bell-curve weighing function. |
Note The NI 4065 does not support this setting.
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViReal64 | RO | None | None |
For the NI 4080/4081/4082 and the NI 4070/4071/4072, specifies the value of the frequency voltage range. If Auto Ranging, shows the actual value of the active frequency voltage range. If not Auto Ranging, the value is the same as that of NIDMM_ATTRIBUTE_FREQ_VOLTAGE_RANGE.
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViReal64 | R/W | Yes | niDMM_ConfigureFrequencyVoltageRange |
For the NI 4070/4071/4072, specifies the maximum amplitude of the input signal for frequency measurements.
|NIDMM_VAL_AUTO_RANGE_ON (default)|-1.0|Configures the DMM to take an Auto Range measurement to calculate the voltage range before each frequency or period measurement :- | |NIDMM_VAL_AUTO_RANGE_OFF|-2.0|Disables Auto Ranging. NI-DMM sets the voltage range to the last calculated voltage range.|
Note Not supported on the NI 4080/4081/4082. These devices must be set to a valid value
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViReal64 | R/W | Yes | None |
Specifies the input resistance of the instrument.
Note The NI 4050 and NI 4060 are not supported
NIDMM_VAL_1_MEGAOHM | 1000000.00 | 1 MΩ |
---|---|---|
NIDMM_VAL_10_MEGAOHM | 10000000.00 | 10 MΩ |
NIDMM_VAL_GREATER_THAN_10_GIGAOHM | 10000000000.00 | >10 GΩ |
Note These defined values are currently not supported for gRPC, instead pass the raw values specified alongside, directly.
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViReal64 | R/W | Yes | niDMM_ConfigureACBandwidth |
Specifies the maximum frequency component of the input signal for AC measurements. This attribute is used only for error checking and verifies that the value of this parameter is less than the maximum frequency of the device. This attribute affects the DMM only when you set the NIDMM_ATTRIBUTE_FUNCTION attribute to AC measurements. The valid range is 1 Hz–300 kHz for the NI 4080/4081/4082 and NI 4070/4071/4072, 10 Hz–100 kHz for the NI 4065, and 20 Hz–25 kHz for the NI 4050 and NI 4060.
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViReal64 | R/W | None | niDMM_ConfigureACBandwidth |
Specifies the minimum frequency component of the input signal for AC measurements. This attribute affects the DMM only when you set the NIDMM_ATTRIBUTE_FUNCTION attribute to AC measurements. The valid range is 1 Hz–300 kHz for the NI 4080/4081/4082 and NI 4070/4071/4072, 10 Hz–100 kHz for the NI 4065, and 20 Hz–25 kHz for the NI 4050 and NI 4060.
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViInt32 | R/W | None | niDMM_ConfigureOffsetCompOhms |
For the NI 4080/4081/4082 and NI 4070/4071/4072 only, enables or disables offset compensated ohms.
NIDMM_VAL_OFFSET_COMP_OHMS_OFF (default) | 0 | Off disables Offset Compensated Ohms. |
---|---|---|
NIDMM_VAL_OFFSET_COMP_OHMS_ON | 1 | On enables Offset Compensated Ohms. |
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViReal64 | R/W | None | niDMM_ConfigurePowerlineFrequency |
Specifies the powerline frequency. The NI 4050 and NI 4060 use this value to select an aperture time to reject powerline noise by selecting the appropriate internal sample clock and filter. The NI 4065, NI 4070/4071/4072, and the NI 4080/4081/4082 use this value to select a timebase for setting the NIDMM_ATTRIBUTE_APERTURE_TIME attribute in powerline cycles (PLCs).
After configuring powerline frequency, set the NIDMM_ATTRIBUTE_APERTURE_TIME_UNITS attribute to PLCs. When setting the NIDMM_ATTRIBUTE_APERTURE_TIME attribute, select the number of PLCs for the powerline frequency. For example, if powerline frequency = 50 Hz (or 20ms) and aperture time in PLCs = 5, then aperture time in Seconds = 20ms * 5 PLCs = 100 ms. Similarly, if powerline frequency = 60 Hz (or 16.667 ms) and aperture time in PLCs = 6, then aperture time in Seconds = 16.667 ms * 6 PLCs = 100 ms.
NIDMM_VAL_50_HERTZ | 50 Hz |
---|---|
NIDMM_VAL_60_HERTZ | 60 Hz |
Note For 400 Hz powerline frequency, use the 50 Hz setting
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViReal64 | R/W | None | None |
For the NI 4050 only, specifies the shunt resistance value.
Note The NI 4050 requires an external shunt resistor for current measurements. This attribute should be set to the value of shunt resistor
Data type | Access | Coercion | High-Level Function |
---|---|---|---|
ViReal64 | R/W | None | None |
Specifies the Callendar-Van Dusen A coefficient for RTD scaling when the RTD Type property is set to Custom. The default value is 3.9083e-3 (Pt3851).
Data type | Access | Coercion | High-Level Function |
---|---|---|---|
ViReal64 | R/W | None | None |
Specifies the Callendar-Van Dusen B coefficient for RTD scaling when the RTD Type property is set to Custom. The default value is -5.775e-7(Pt3851).
Data type | Access | Coercion | High-Level Function |
---|---|---|---|
ViReal64 | R/W | None | None |
Specifies the Callendar-Van Dusen C coefficient for RTD scaling when the RTD Type property is set to Custom. The default value is -4.183e-12(Pt3851).
Data type | Access | Coercion | High-Level Function |
---|---|---|---|
ViReal64 | R/W | None | None |
Specifies the RTD resistance at 0 degrees Celsius. This applies to all supported RTDs, including custom RTDs. The default value is 100 (Ω).
Data type | Access | Coercion | High-Level Function |
---|---|---|---|
ViInt32 | R/W | None | None |
Specifies the type of RTD used to measure temperature. The default value is NIDMM_VAL_TEMP_RTD_PT3851.
Enum | Standards | Material | TCR | Typical R0 (Ω) | Callendar-Van Dusen Coefficient | Notes |
---|---|---|---|---|---|---|
NIDMM_VAL_TEMP_RTD_CUSTOM | — | Varies | Varies | 100 Ω | A = user defined B = user defined C = user defined |
User defines Callendar-Van Dusen A, B, and C coefficients with the NIDMM_ATTRIBUTE_TEMP_RTD_A, NIDMM_ATTRIBUTE_TEMP_RTD_B, and NIDMM_ATTRIBUTE_TEMP_RTD_C attributes, respectively. |
NIDMM_VAL_TEMP_RTD_PT3851 | IEC-751 DIN 43760 BS 1904 ASTM-E1137 EN-60751 |
Platinum | 3851 | 100 Ω 1000 Ω |
A = 3.9083 × 10–3 B = –5.775×10–7 C = –4.183×10–12 |
Most common RTDs |
NIDMM_VAL_TEMP_RTD_PT3750 | Low-cost vendor compliant RTD* | Platinum | 3750 | 1000 Ω | A = 3.81 × 10–3 B = –6.02×10–7 C = –6.0×10–12 |
Low-cost RTD |
NIDMM_VAL_TEMP_RTD_PT3916 | JISC 1604 | Platinum | 3916 | 100 Ω | A = 3.9739 × 10–3 B = –5.870×10–7 C = –4.4 ×10–12 |
Used primarily in Japan |
NIDMM_VAL_TEMP_RTD_PT3920 | US Industrial Standard D-100 American |
Platinum | 3920 | 100 Ω | A = 3.9787 × 10–3 B = –5.8686×10–7 C = –4.167 ×10–12 |
Low-cost RTD |
NIDMM_VAL_TEMP_RTD_PT3911 | US Industrial Standard American |
Platinum | 3911 | 100 Ω | A = 3.9692 × 10–3 B = –5.8495×10–7 C = –4.233 ×10–12 |
Low-cost RTD |
NIDMM_VAL_TEMP_RTD_PT3928 | ITS-90 | Platinum | 3928 | 100 Ω | A = 3.9888 × 10–3 B = –5.915×10–7 C = –3.85 ×10–12 |
The definition of temperature |
*No standard. Check the Temperature Coefficient of Resistance (TCR). |
Data type | Access | Coercion | High-Level Function |
---|---|---|---|
ViReal64 | R/W | None | None |
Specifies the reference junction temperature when a fixed reference junction is used to take a thermocouple measurement. The default value is 25.0 (°C).
Data type | Access | Coercion | High-Level Function |
---|---|---|---|
ViInt32 enum | R/W | None | None |
Specifies the type of reference junction to be used in the reference junction compensation of a thermocouple. The only supported value, NIDMM_VAL_TEMP_REF_JUNC_FIXED, is fixed.
Data type | Access | Coercion | High-Level Function |
---|---|---|---|
ViInt32 enum | R/W | None | None |
Specifies the type of thermocouple used to measure the temperature. The default value is NIDMM_VAL_TEMP_TC_J.
NIDMM_VAL_TEMP_TC_B | Thermocouple type B |
---|---|
NIDMM_VAL_TEMP_TC_E | Thermocouple type E |
NIDMM_VAL_TEMP_TC_J | Thermocouple type J |
NIDMM_VAL_TEMP_TC_K | Thermocouple type K |
NIDMM_VAL_TEMP_TC_N | Thermocouple type N |
NIDMM_VAL_TEMP_TC_R | Thermocouple type R |
NIDMM_VAL_TEMP_TC_S | Thermocouple type S |
NIDMM_VAL_TEMP_TC_T | Thermocouple type T |
Data type | Access | Coercion | High-Level Function |
---|---|---|---|
ViReal64 | R/W | None | None |
Specifies the Steinhart-Hart A coefficient for thermistor scaling when the Thermistor Type property is set to Custom. The default value is 0.0010295 (44006).
Data type | Access | Coercion | High-Level Function |
---|---|---|---|
ViReal64 | R/W | None | None |
Specifies the Steinhart-Hart B coefficient for thermistor scaling when the Thermistor Type proerty is set to Custom. The default value is 0.0002391 (44006).
Data type | Access | Coercion | High-Level Function |
---|---|---|---|
ViReal64 | R/W | None | None |
Specifies the Steinhart-Hart C coefficient for thermistor scaling when the Thermistor Type property is set to Custom. The default value is 1.568e-7 (44006).
Data type | Access | Coercion | High-Level Function |
---|---|---|---|
ViInt32 | R/W | None | None |
Specifies the type of thermistor used to measure the temperature. The default value is NIDMM_VAL_TEMP_THERMISTOR_44006.
Defined Values | Thermistor Type | Value | 25 °C |
---|---|---|---|
NIDMM_VAL_TEMP_THERMISTOR_CUSTOM | Custom | 0 | — |
NIDMM_VAL_TEMP_THERMISTOR_44004 | 44004 | 1 | 2.25 k |
NIDMM_VAL_TEMP_THERMISTOR_44006 | 44006 | 2 | 10 k |
NIDMM_VAL_TEMP_THERMISTOR_44007 | 44007 | 3 | 5 k |
Data type | Access | Coercion | High-Level Function |
---|---|---|---|
ViInt32 | R/W | None | None |
Specifies the type of device used to measure the temperature. The default value is NIDMM_VAL_4_THERMOCOUPLE.
NIDMM_VAL_2_WIRE_RTD | 2-wire RTD |
---|---|
NIDMM_VAL_4_WIRE_RTD | 4-wire RTD |
NIDMM_VAL_4_THERMISTOR | Thermistor |
NIDMM_VAL_4_THERMOCOUPLE | Thermocouple |
Data type |
Access | Coercion | High-Level Function |
---|---|---|---|
ViInt32 | R/W | Yes | niDMM_ConfigureMeasurementDigits niDMM_ConfigureMeasurementAbsolute |
Specifies the measurement range. Use positive values to represent the absolute value of the maximum expected measurement. The value is in units appropriate for the current value of the NIDMM_ATTRIBUTE_FUNCTION attribute. For example, if NIDMM_ATTRIBUTE_FUNCTION is set to NIDMM_VAL_DC_VOLTS, the units are volts.
Note The NI 4050, NI 4060, and NI 4065 only support Auto Range when the trigger and sample trigger are set to IMMEDIATE
(-1.0) | NIDMM_VAL_AUTO_RANGE_ON | NI-DMM performs an Auto Range before acquiring the measurement. |
---|---|---|
(-2.0) | NIDMM_VAL_AUTO_RANGE_OFF | NI-DMM sets the Range to the current NIDMM_ATTRIBUTE_AUTO_RANGE_VALUE and uses this range for all subsequent measurements until the measurement configuration is changed. |
(-3.0) | NIDMM_VAL_AUTO_RANGE_ONCE | NI-DMM performs an Auto Range before acquiring the next measurement. The NIDMM_ATTRIBUTE_AUTO_RANGE_VALUE is stored and used for all subsequent measurements until the measurement configuration is changed. |