National Instruments NI PXI-5122 Скачать руководство пользователя страница 21

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NI 5122/5124/5142 Calibration Procedure

15. Fetch a waveform from the digitizer and perform a voltage average measurement using the

niScope Fetch Measurement (poly) VI. Select the Measurement Scalar DBL instance of the
VI. This value is the

Measured Negative Voltage

used in step 16.

16. Calculate the error in the programmable vertical offset as a percentage of input using the

following formula:

error = (((

) / 1.5) - 1) * 100

where

= the

Measured Positive Voltage

= the

Measured Negative Voltage

Compare the resulting percent to the

Calibration Test Limits

or the

Published

Specifications

listed in Table 9 (NI 5122/5142) and Table 10 (NI 5124). If the result is

within the selected test limit, the device has passed this portion of the verification.

LabVIEW VI

C/C++ Function Call

Call

niScope_Initiate

Acquisition

with the

following parameter:

: The instrument handle from

niScope_init

LabVIEW VI

C/C++ Function Call

Call

niScope_FetchMeasurement

with the following parameters:

timeout

1.0

: The instrument handle from

niScope_init

channelList

"0"

scalarMeasFunction

NISCOPE_VAL_VOLTAGE_AVER
AGE

Table 9.

NI 5122/5142 Programmable Vertical Offset Accuracy Limits

NI PXI/PXIe-5122 and NI PXI-5142

NI PCI-5122/5142

Calibration Test

Limits

Published

Specifications

Calibration Test

Limits

Published

Specifications

±0.36%

±0.4%

±0.36%

±0.5%

Содержание NI PXI-5122

Страница 1: ...th and Flatness 26 Trigger Sensitivity 34 Adjustment 39 Appendix A Calibration Options 42 Complete Calibration 43 Optional Calibration 43 Appendix B Calibration Utilities 45 MAX 45 NI SCOPE 45 Worldwi...

Страница 2: ...ncludes detailed information about the digitizer and NI SCOPE VIs and functions NI PXI PXIe PCI 5122 Specifications NI PXI PCI 5142 Specifications or NI PXI PCI 5124 Specifications includes detailed i...

Страница 3: ...libration Always connect the calibrator test head directly to the input BNC of the digitizer or use a short 50 BNC coaxial cable if necessary Long cables and wires act as antennae picking up extra noi...

Страница 4: ...the device is operating within the published specifications prior to adjustment 4 Adjustment Perform an external adjustment of the device that adjusts the calibration constants of the device The adju...

Страница 5: ...E To self calibrate the digitizer programmatically using NI SCOPE complete the following steps 1 Disconnect or disable all AC inputs to the digitizer 2 Open a session and obtain a session handle using...

Страница 6: ...ble 3 for channel 0 then repeat the procedures for channel 1 The Calibration Test Limits and Published Specifications for vertical gain accuracy are shown in Table 7 NI 5122 5142 and Table 8 NI 5124 T...

Страница 7: ...0 000 0 4 28 1 M 35 000 000 60 000 000 1 29 1 M 35 000 000 60 000 000 2 30 1 M 35 000 000 60 000 000 4 31 1 M 35 000 000 60 000 000 10 32 1 M 35 000 000 60 000 000 20 33 1 M 20 000 000 20 000 000 0 2...

Страница 8: ...aximum input frequency using the niScope Configure Chan Characteristics VI 3 Configure the common vertical properties using the niScope Configure Vertical VI LabVIEW VI C C Function Call Call niScope_...

Страница 9: ...probeAttenuation 1 0 vi The instrument handle from niScope_init channelList 0 range The Range value in Table 3 for the current iteration offset 0 0 enabled NISCOPE_VAL_TRUE LabVIEW VI C C Function Cal...

Страница 10: ...NI 5122 Table 5 NI 5124 or Table 6 NI 5142 that corresponds to the vertical range used Note The inputImpedance and maxInputFrequency do not affect the test limit value If the result is within the sel...

Страница 11: ...ublished Specifications V Calibration Test Limits V Published Specifications V 0 2 0 00058 0 001 0 00114 0 002 0 4 0 00056 0 001 0 00114 0 002 1 0 00076 0 0012 0 00114 0 002 2 0 0008 0 0016 0 00114 0...

Страница 12: ...ts V Published Specifications V Calibration Test Limits V Published Specifications V 0 2 0 00058 0 001 0 00114 0 002 0 4 0 00056 0 001 0 00114 0 002 1 0 00076 0 0012 0 00114 0 002 2 0 0008 0 0016 0 00...

Страница 13: ...C C Function Call Call niScope_ConfigureChan Characteristics with the following parameters channelList 0 inputImpedance The Input Impedance value in Table 3 for the current iteration maxInputFrequenc...

Страница 14: ...iScope Initiate Acquisition VI 9 Fetch a waveform from the digitizer and perform a voltage average measurement using the niScope Fetch Measurement poly VI Select the Measurement Scalar DBL instance of...

Страница 15: ...Measurement poly VI Select the Measurement Scalar DBL instance of the VI This value is the Measured Negative Voltage used in step 14 LabVIEW VI C C Function Call Call niScope_Fetch Measurement with t...

Страница 16: ...portion of the verification 15 Repeat steps 2 through 14 for each iteration in Table 3 Table 7 NI 5122 5142 Vertical Gain Stimuli and Limits Range V Positive Input V Negative Input V Calibration Test...

Страница 17: ...gitizer channel 1 Open a session and obtain a session handle using the niScope Initialize VI 2 Configure the input impedance and the maximum input frequency using the niScope Configure Chan Characteri...

Страница 18: ...onfigureChan Characteristics with the following parameters vi The instrument handle from niScope_init channelList 0 inputImpedance NISCOPE_VAL_1_MEG_OHM maxInputFrequency 100 000 000 for NI 5122 5142...

Страница 19: ...age average measurement using the niScope Fetch Measurement poly VI Select the Measurement Scalar DBL instance of the VI This value is the Measured Positive Voltage used in step 16 LabVIEW VI C C Func...

Страница 20: ...nitiate Acquisition VI LabVIEW VI C C Function Call Call niScope_FetchMeasuremen t with the following parameters timeout 1 0 vi The instrument handle from niScope_init channelList 0 scalarMeasFunction...

Страница 21: ...ts or the Published Specifications listed in Table 9 NI 5122 5142 and Table 10 NI 5124 If the result is within the selected test limit the device has passed this portion of the verification LabVIEW VI...

Страница 22: ...y for the NI 5122 5124 5142 1 Open a session and obtain a session handle using the niScope Initialize VI 2 Configure the input impedance and the maximum input frequency using the niScope Configure Cha...

Страница 23: ...ming VI LabVIEW VI C C Function Call Call niScope_ConfigureChan Characteristics with the following parameters channelList 0 inputImpedance NISCOPE_VAL_50_OHM maxInputFrequency 20 000 000 LabVIEW VI C...

Страница 24: ...cquisition VI 9 Retrieve a waveform using the niScope Fetch poly VI Select the WDT instance of the VI Use the default value for the timestamp Type parameter LabVIEW VI C C Function Call Call niScope_C...

Страница 25: ...n Test Limits or the Published Specifications listed in Table 11 If the result is within the selected test limit the device has passed this portion of the verification Note The same time source is use...

Страница 26: ...tion listed in Table 12 NI 5122 5142 or Table 13 NI 5124 1 Open a session and obtain a session handle using the niScope Initialize VI 2 Configure the input impedance and the maximum input frequency us...

Страница 27: ...nit channelList 0 inputImpedance The Input Impedance value in Table 12 NI 5122 5142 or Table 13 NI 5124 for the current iteration maxInputFrequency The Maximum Input Frequency value in Table 12 NI 512...

Страница 28: ...Initiate Acquisition VI 9 Fetch a waveform from the digitizer and perform a voltage RMS measurement using the niScope Fetch Measurement poly VI Select the Measurement Scalar DBL instance of the VI Th...

Страница 29: ...the impedance matching and frequency of the calibrator to settle c Initiate a waveform acquisition using the niScope Initiate Acquisition VI LabVIEW VI C C Function Call Call niScope_Fetch Measuremen...

Страница 30: ...rom Table 12 NI 5122 5142 or Table 13 NI 5124 the device has passed this portion of the verification 12 Repeat steps 2 through 11 for each iteration in Table 12 NI 5122 5142 or Table 13 NI 5124 13 Mov...

Страница 31: ...5122 5142 Bandwidth and Flatness Stimuli and Published Specifications Iteration Max Input Frequency Input Impedance Range V Input Frequency Hz NI 5122 5142 Published Specifications Max Level dB Min L...

Страница 32: ...uded in device specifications documents Warranted value Other values are typical For definitions of warranted specifications and typical specifications refer to the specifications document for your de...

Страница 33: ...50 000 000 3 3 3 150 MHz 1 M 0 2 20 100 000 0 6 0 6 40 100 000 1 5 1 5 75 000 000 3 3 4 150 MHz 1 M 0 4 20 100 000 0 5 0 5 50 100 000 1 1 100 100 000 1 7 1 7 145 000 000 3 3 5 60 MHz 50 4 22 100 000 2...

Страница 34: ...input impedance and the maximum input frequency using the niScope Configure Chan Characteristics VI 3 Configure the common vertical properties using the niScope Configure Vertical VI LabVIEW VI C C F...

Страница 35: ...EW VI C C Function Call Call niScope_Configure Vertical with the following parameters coupling NISCOPE_VAL_DC probeAttenuation 1 0 vi The instrument handle from niScope_init channelList 0 range 0 2 of...

Страница 36: ...uisition using the niScope Initiate Acquisition VI LabVIEW VI C C Function Call Call niScope_Configure TriggerEdge with the following parameters triggerCoupling NISCOPE_VAL_DC slope The Slope value in...

Страница 37: ...verify the trigger sensitivity on the external trigger channel repeat steps 2 through 11 using the values in Table 14 iterations 9 through 12 Make the following changes Change the channelList to 0 Co...

Страница 38: ...25 NISCOPE_VAL_ POSITIVE 4 84 mVpk pk 50 MHz sine wave with 50 load impedance 6 84 mVpk pk 50 MHz sine wave with 50 load impedance 6 1 1 25 NISCOPE_VAL_ NEGATIVE 7 1 1 25 NISCOPE_VAL_ POSITIVE 9 70 m...

Страница 39: ...ration test limits and you do not want to perform an adjustment you can update the calibration date and onboard calibration temperature without making any adjustments by completing only steps 2 and 12...

Страница 40: ...ncy is enabled and set to 10 MHz If you are not using a Fluke 9500B Wavetek 9500 calibrator connect a precise 10 MHz 1 Vpk pk sine or square wave source to channel 0 9 Adjust the sample rate using the...

Страница 41: ...wever you should repeat the entire verification procedure to verify a successful adjustment LabVIEW VI C C Function Call Call niScope_CalAdjust VCXO with the following parameters sessionHandle The ins...

Страница 42: ...ment errors determined during verification fall within the calibration test limits the device is guaranteed to meet or exceed its published specifications for a full calibration interval two years For...

Страница 43: ...ng the first verification fall within the calibration test limits the device is guaranteed to meet or exceed its published specifications for a full calibration interval In this case you can update th...

Страница 44: ...bration Figure 2 Optional Calibration Programming Flow Meets Calibration Test Limits Yes No Meets Published Specifications Yes No Adjust Anyway No Calibration Verification Complete Yes Document Post A...

Страница 45: ...ty functions include niScope Cal Change Password VI niScope_CalChangePassword niScope Cal Fetch Count VI niScope_CalFetchCount niScope Cal Fetch Date VI niScope_CalFetchDate niScope Cal Fetch Misc Inf...

Страница 46: ...RESS OR IMPLIED WARRANTIES AS TO THE ACCURACY OF THE INFORMATION CONTAINED HEREIN AND SHALL NOT BE LIABLE FOR ANY ERRORS U S Government Customers The data contained in this manual was developed at pri...

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