Keithley 6517B Reference Manual

In this appendix:
Introduction ............................................................................... A-1
Introduction
This section discusses front panel triggering, trigger configuration, and external triggering, including
example setups.
Calculating volts accuracy
From the specifications, volts is calculated as follows:
Accuracy = ± (% rdg + counts)
The following example shows how to compute accuracy for the 2 V range:
Assume that the voltage you are measuring is reading exactly 1.00000 V on the 2 V range.
From the specifications:
Accuracy = ± (0.025 % of 1 V + 4 counts)
= ± (0.00025 V + 4 counts)
= ± (0.00025 V + 0.00004 V)
= ± 0.00029 V
Four counts on the 2 V range equals 0.00004 V.
Therefore, the accuracy range for the 1.00000 V reading is 0.99971 V to 1.00029 V.
Appendix A
Accuracy calculations

Keithley 6517B Specifications

General

Input Impedance	>200 TΩ
Electrometer Type	Electrometer/High Resistance Meter
Current Measurement Range	20 fA to 20 mA
Display	Vacuum Fluorescent Display
Communication Interfaces	IEEE-488 (GPIB), RS-232
Power Supply	100 V / 120 V / 220 V / 240 V; 50 Hz / 60 Hz
Resistance Measurement Range	Up to 200 TΩ