Specifications

3 Signametrics
TABLE OF CONTENTS
1.0 INTRODUCTION.................................................................................................................................................7
1.1 S AFETY C ONSIDERATIONS ..........................................................................................................................7
1.2 M INIMUM R EQUIREMENTS .........................................................................................................................8
1.3 F EATURE S ET .............................................................................................................................................8
2.0 SPECIFICATIONS...............................................................................................................................................9
2.1 DC V OLTAGE M EASUREMENT ...................................................................................................................9
2.2 DC C URRENT M EASUREMENT ....................................................................................................................9
2.3 AC V OLTAGE M EASUREMENTS ..................................................................................................................9
2.3.1 AC Voltage True RMS Measurement.......................................................................................9
2.3.2 AC Peak-to-Peak Measurement (SMX2044)..........................................................................10
2.3.3 AC Crest Factor Measurement (SMX2044)...........................................................................10
2.3.4 AC Median Value Measurement (SMX2044).........................................................................11
2.4 AC C URRENT M EASUREMENT , T RUE RMS..............................................................................................11
2.5 R ESISTANCE M EASUREMENTS ..................................................................................................................12
2.5.1 2-wire and 4-wire...................................................................................................................12
2.5.2 6-wire Guarded Resistance Measurement (SMX2044)..........................................................12
2.6 L EAKAGE M EASUREMENT (SMX2044)....................................................................................................12
2.7 RTD T EMPERATURE M EASUREMENT (SMX2044)...................................................................................12
2.8 A DDITIONAL C OMPONENT M EASUREMENTS ............................................................................................13
2.8.1 Diode Characterization .........................................................................................................13
2.8.2 Capacitance Measurement (SMX2042, 44) ...........................................................................13
2.8.3 Inductance Measurement (SMX2044)....................................................................................13
2.8.4 In Circuit AC-Based Capacitance Measurements (SM2044) ................................................13
2.9 T IMING M EASUREMENTS (SMX2042, 44)................................................................................................14
2.9.1 Threshold DAC ......................................................................................................................14
2.9.2 Frequency and Period Measurement.....................................................................................14
2.9.3 Duty Cycle Measurement.......................................................................................................14
2.9.4 Pulse Width............................................................................................................................14
2.9.5 Totalizer.................................................................................................................................15
2.10 T RIGGER F UNCTIONS ..............................................................................................................................15
2.10.1 External Hardware Trigger (at DIN-7 connector) ..............................................................15
2.10.2 PXI Bus Hardware Trigger Inputs (at PXI J2)....................................................................15
2.10.3 PXI Bus Hardware Trigger Output (to PXI J2)...................................................................15
2.10.4 Analog Threshold Trigger....................................................................................................15
2.11 S OURCE F UNCTIONS (SMX2044)...........................................................................................................16
2.11.1 DC Voltage Source ..............................................................................................................16
2.11.2 AC Voltage Source...............................................................................................................16
2.11.3 DC Current Source ..............................................................................................................16
2.12 A CCURACY N OTES .................................................................................................................................17
2.13 O THER S PECIFICATIONS .........................................................................................................................18
3.0 GETTING STARTED.........................................................................................................................................19
3.1 S ETTING THE DMM..................................................................................................................................19
3.2 I NSTALLING THE DMM M ODULE .............................................................................................................19
3.3 I NSTALLING THE DMM SOFTWARE PACKAGE ...........................................................................................19
3.4 DMM I NPUT C ONNECTORS ......................................................................................................................19
3.5 S TARTING THE C ONTROL P ANEL ..............................................................................................................21
3.6 U SING THE C ONTROL P ANEL ....................................................................................................................22
4.0 DMM OPERATIONS AND MEASUREMENTS.............................................................................................24
4.1 V OLTAGE M EASUREMENT ........................................................................................................................24
4.1.1 DC Voltage Measurements ....................................................................................................24
4.1.2 True RMS AC Voltage Measurements ...................................................................................25
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