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duration [s] specifies how many seconds of data are acquired to calibrate the selected channel.
The actual duration of the calibration process could be longer than this value, especially if you select self calibrate device.
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sampling frequency [Hz] specifies the sampling frequency for data acquisition in hertz.
If you are using a DAQ device, confirm that the device supports this frequency.
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DAQmx physical channel specifies the name of the physical channel on which to perform an end-to-end calibration. The DAQmx physical channel constant lists all physical channels for devices and modules installed in the system.
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calibration settings specifies settings used during calibration.
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calibration value [EU rms] specifies the reference signal level generated by the calibrator.
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calibration frequency [Hz] specifies the frequency of the reference signal in hertz.
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channel configuration specifies the input limits and terminal configuration to use on the specified DAQmx physical channel.
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maximum value (V) specifies the maximum scaled data the device measures for the selected channel. The default is 1.0 V.
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minimum value (V) specifies the minimum scaled data the device measures for the selected channel. The default is -1.0 V.
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terminal configuration specifies the input terminal configuration of the selected channel.
| Default | Default is the default device terminal configuration. Refer to the device documentation for information about the default terminal configuration. |
| RSE | The referenced single-ended (RSE) configuration measures the signal with respect to a ground directly connected to the measurement system ground. |
| NRSE | The nonreferenced single-ended (NRSE) configuration measures the signal with respect to a single ground, but the potential may differ from the measurement system ground. |
| Differential | The differential configuration has neither of its inputs tied to a fixed reference, such as earth or building ground. |
| Pseudodifferential | The pseudodifferential configuration references the positive and negative inputs for the channel to measurement system ground through different impedances. The pseudodifferential terminal configuration measures the difference between the positive and negative inputs. |
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enable IEPE excitation (T) specifies whether or not to enable the onboard current excitation to power integrated electronic piezoelectric (IEPE) sensors. The default setting is TRUE and enables 4.0 mA of current excitation.
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channel info contains information about the measurement system used before the signal reaches the DAQ device.
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sensor sensitivity [mV/EU] specifies the sensitivity of the sensor in mV/EU.
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engineering units specifies the engineering units.
If you are using a microphone, select Pa. If you are using an accelerometer, select g, m/s^2, or in/s^2. If the units you need are not listed, select custom and enter the unit to use in custom label.
| custom... | | V | A
| Pa
| N
| g
| m/s^2
| m/s
| m
| mm/s
| mm
| micron/s
| micron
| in/s^2
| in/s
| in
| mil/s
| mil
| rad/s^2
| rad/s
| rad
| strain
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dB reference [EU] is the reference value used when results are computed in decibels.
dB reference [EU] is expressed in the selected engineering units. The typical decibels reference for sound pressure level is 20E–6 Pa. When engineering units is set to Pa, the dB reference [EU] is automatically set to 20E–6 Pa.
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custom label is the string used for units when engineering units is set to custom.
If engineering units is not set to custom, this parameter is ignored.
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weighting filter specifies if any weighting filter has been applied to the signal. This control does not apply any weighting to the signal. weighting filter should always return linear for calibration measurements.
Use weighting filter only if the acquired signal has been weighted by an external device before it is acquired by a DAQ device. If a weighting filter was applied to the signal before reaching the DAQ device, using weighting filter prevents subsequent VIs from applying any additional weighting to the weighted signal.
| Linear |
| A-weighting |
| B-weighting |
| C-weighting |
| ITU-R 468.4 |
| Dolby |
| CCITT |
| C-message |
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pregain [dB] is the pregain applied by an external amplifier expressed in decibels. A value of 0 dB specifies no pregain.
Use pregain [dB] only if an external device amplifies the signal before a DAQ device acquires the signal. If you apply any gain with the DAQ device itself, the driver software takes this into account and you do not need to enter the information.
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error in describes error conditions that occur before this VI or function runs.
The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use exception control to treat what is normally an error as no error or to treat a warning as an error. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node.
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status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE.
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code is the error or warning code. The default is 0.
If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code.
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source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
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self calibrate device (F) specifies whether a device level calibration is performed before the system calibration. The default is FALSE.
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time to settle [s] specifies the amount of time to wait, in seconds, to allow the measurement hardware to settle. Specify a value for this parameter if you change input coupling or integrated electronic piezoelectric (IEPE) excitation.
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power spectrum returns the power spectrum.
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spectrum info returns information about the spectrum that you can pass to another VI.
If you want to view the information, you can create a custom probe.
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calibrated sensor sensitivity [mV/g] returns the measured sensor sensitivity in mV/g.
The VI also returns this value as sensor sensitivity [mV/EU] in calibrated channel info.
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calibrated channel info contains the calibrated sensor sensitivity. All other information is identical to channel info.
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sensor sensitivity [mV/EU] contains the sensitivity of the sensor expressed in mV/EU.
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engineering units specifies the engineering units.
If you are using a microphone, select Pa. If you are using an accelerometer, select g, m/s^2, or in/s^2. If the units you need are not listed, select custom and enter the unit to use in custom label.
custom...
| V
| A
| Pa
| N
| g
| m/s^2
| m/s
| m
| mm/s
| mm
| micron/s
| micron
| in/s^2
| in/s
| in
| mil/s
| mil
| rad/s^2
| rad/s
| rad
| strain
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dB reference [EU] is the reference value used when results are computed in decibels. dB reference [EU] is expressed in the selected engineering units.
The typical decibels reference for sound pressure level is 20E–6 Pa. When engineering units is set to Pa, the dB reference [EU] is automatically set to 20E–6 Pa.
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custom label returns the string used for units when engineering units is set to custom.
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weighting filter specifies if any weighting filter has been applied to the signal.
| Linear |
| A-weighting |
| B-weighting |
| C-weighting |
| ITU-R 468.4 |
| Dolby |
| CCITT |
| C-message |
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pregain [dB] is the pregain applied by an external amplifier expressed in decibels.
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amplitude [V rms] returns the measured amplitude of the calibration signal in volts root-mean-square (V rms). This is the measured amplitude of the signal at the calibration frequency only.
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frequency [Hz] returns the measured frequency of the calibration signal in hertz.
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error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces.
Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error.
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status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred.
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code is the error or warning code.
If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code.
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source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.
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