KEITHLEY 2182A MANUAL PDF

Voltage Only Connections Programming example The following program fragment performs limit tests on a voltage input to Channel 1: Handling and cleaning To avoid contaminating PC board traces with body oil or other foreign matter, avoid touching the PC board maanual while you are repairing the instrument. PRESet defaults Description This command returns the instrument to states optimized for front panel operation. STEP commands are intended to be one-time manufacturing calibration steps, and are only allowed if the STEP key was held in at power-up. Key SCPI commands are included in the trigger model. Remote Operation Condition registers Figure shows, some register sets have a condition register. Description query may be used to determine the total number of times the: Perform the following steps to set the integration rate: I Delta, Pulse Delta, and Differential Conductance Figure I-5 Pulse timing The three available sweeps include 1 staircase sweep, 2 logarithmic sweep and 3 cus- tom sweep.

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Intercomparisons of standard cells Null meter for resistance bridge measurements The Keithley A Nanovoltmeter is optimized for making stable, low noise voltage measurements and for characterizing low resistance materials and devices reliably and repeatably. It provides higher measurement speed and significantly better noise performance than alternative low voltage measurement solutions. The A represents the next step forward in Keithley nanovoltmeter technology, replacing the original Model and offering enhanced capabilities including pulse capability, lower measurement noise, faster current reversals, and a simplified delta mode for making resistance measurements in combination with a reversing current source.

Low noise levels are assured over a wide range of useful response times, e. Figure 1. DC Noise Performance Figure 2. Delta Mode Figure 3. The A reduces this interference by synchronizing its measurement cycle to line, which minimizes variations due to readings that begin at different phases of the line cycle. The result is exceptionally high immunity to line interference with little or no shielding and filtering required. An Easy-to-Use Delta Mode Keithley originally created the delta mode method for measuring voltage and resistance for the Model and a triggerable external current source.

Basically, the delta mode automatically triggers the current source to alternate the signal polarity, and then triggers a nanovoltmeter reading at each polarity. This current reversal technique cancels out any constant thermoelectric offsets, so the results reflect the true value of the voltage being measured. The new technique can cancel thermoelectric offsets that drift over time not just static offsets , produces results in half the time of the original technique, and allows the current source to control and configure the A.

The improved cancellation and higher reading rates reduce measurement noise to as little as 1nV. Figure 4. Transient Currents Figure 5. Metrology Applications The A combines the accuracy of a digital multimeter with low noise at high speeds for high-precision metrology applications.

Its low noise, high signal observation time, fast measurement rates, and 2ppm accuracy provide the most cost-effective meter available today for applications such as intercomparison of voltage standards and direct measurements of resistance standards.

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