APPLICATION NOTES
Testing Resistor Suitability for AMETRIX Picoammeters
With the exception of the 500 MΩ resistor, all the Model 101 resistors are known to have great long-term stability and low-temperature coefficients. The 500 MΩ, is a metal oxide of questionable stability. This paper describes the tests performed to prove or disprove one resistor’s suitability for use in the Model 100 Series calibrator. Read more.
Using the AMETRIX Model 101 to Investigate Leakage Currents in Clamp Diodes
Clamp diodes are widely used in analog electronic circuits. Like all real-world components, these diodes have some non-ideal characteristics; this paper investigates some of these characteristics for a few diode candidates. The AMETRIX® Instruments’ Model 101 picoammeter is used for measuring these small currents. Read more.
Relay Leakage Testing with the AMETRIX Model 101 Picoammeter
Relay manufacturers’ specs are usually warranted minimums, and frequently are much better than actual performance. This is a report summarizing the results of testing a sampling of reed relays, and the variation among samples. Read more.
An In-Depth Discussion of Digital Filter Options in the AMETRIX Model 100 Series Picoammeters
This paper is focused on the additional filtering provided by those prominently located on the opening Measurements Tab of the Soft Front Panel (SFP) in the Filter section. There are three types of filters from which to choose; averaging, median, and exponential. Read more.
Characterizing AutoZero Repeatability with the AMETRIX Model 100 Series Picoammeter
How well does the Model 100 Series Picoammeter AutoZero itself? This is a study of measurements taken on multiple units to assess how well AutoZero actually performs. Read more.
Noise-Gain Errors, the Dark Side of Feedback Ammeters
Users of feedback ammeters or trans-impedance amplifiers (TIA), appreciate the fact that they have essentially zero voltage drop, unlike the more typical DMM ammeters. TIAs also offer much better sensitivity, with full-scale ranges as low as ±2.0 nA with single-digit femto amps resolution. But there is a dark side to these TIA ammeters. Read more.
