Low-Level Measurements Resource Kit |
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Webcasts and Tutorials
- Interactive Tutorial: Eliminating Errors in Low Resistance Measurements
A self-paced, multimedia-based technical presentation designed to help you understand how to reduce errors in low resistance measurements and how the NI 4070 FlexDMM improves measurement accuracy.
- Webcast: Developing Precision DC Test Systems in PXI (NITS presentation)
Learn techniques for low-level voltage, current, and resistance measurements, guarding, voltage/current sweeps, and high-performance switching in the PXI platform. After presenting the theory behind these techniques, demonstrations will include the new PXI-4110 programmable power supply, PXI-4022 guard and current amplifier, and PXI-4071 7½-digit DMM.
- Interactive Tutorial: Digital Multimeter Measurement Techniques and Definitions
Learn how you can use a National Instruments digital multimeter (DMM) to build the most accurate measurement system possible. In this tutorial, you learn how the NI 4070 can operate as both a 6½ digit digital multimeter and a fully isolated, high-voltage digitizer, capable of acquiring waveforms at sample rates up to 1.8 MS/s at ±300 V input. This section of the tutorial covers the topics below.
White Papers
- How To Reduce Errors When Switching Low-Voltage Signals (Part 1 of 3)
Part of a three part series that discusses switching low-level voltage, current, and resistances. Part 1 introduces and discusses the techniques and challenges when switching low-voltage signals.
- How To Reduce Errors When Switching Low-Current Signals (Part 2 of 3)
Part of a three part series that discusses switching low-level voltage, current, and resistances. Part 2 introduces and discusses the techniques and challenges when switching low-current signals.
- How To Reduce Errors When Switching Low Resistances (Part 3 of 3)
Part of a three part series that discusses switching low-level voltage, current, and resistances. Part 3 introduces and discusses the techniques and challenges when switching low-resistances.
- Improve Resistance Measurement Accuracy with 6-Wire Technique
Learn how to make 6-wire resistance measurements to reduce measurement errors in applications where the resistor under test is in parallel with another resistance or when automated test probes become contaminated from particles or solvents (and therefore provide a parallel resistance themselves).
- How to Minimize Errors for Low-Current Measurements
Measuring currents in the nanoamp and picoamp ranges requires greater attention to detail when setting up your measurement system. Simply assuming that the value returned from your instrument is infallible can often be a costly mistake. You should understand two factors in particular to ensure accurate measurements – the ammeter measurement method and the impact of measurement cabling.
- Removing Thermal Offset Errors from Contact, Switch, and Relay Resistance Measurements Tutorial
Learn about raditional methods and how to use the NI 4070 FlexDMM Offset Compensated Ohms (OCO) feature to remove thermal offset errors from low-level contact, switch, and relay resistance measurements.
- Calculating Thermocouple Measurement Error in DMM/Switch Temperature Measurement Systems
Temperature measurements are by definition low-voltage measurements, so great care must be taken to ensure the accuracy of a temperature measurement system. Learn key considerations for creating a temperature measurement system and how to characterize its accuracy.
- Performing High-Accuracy Temperature Measurements Using a NI Digital Multimeter and Switch
Learn to take high-accuracy temperature measurements using thermocouples and RTDs.
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