Keithley 2110 User Manual

Model 2110
5½ Digit Multimeter Reference Manual Section 4:
Theory of operation
2110-901-01 Rev. C/August 2013 4-5
Accuracy calculations
The following information discusses how to calculate accuracy for both DC and AC characteristics.
Calculating DC and AC characteristics accuracy
DC characteristics accuracy is calculated as follows:
Accuracy =
% of reading + % of range
As an example of how to calculate the actual reading limits, assume that you are measuring 5V on
the 10V range. You can compute the reading limit range from one-year DCV accuracy specifications
as follows:
Accuracy =
0.012% of reading + 0.004% of range
0.012% * 5 V + 0.004% * 10 V
0.0006 V + 0.0004 V
0.0010 V
Thus, the actual reading range is 5 V ± 1 mV or from 4.999 V to 5.001 V.
DC current, AC voltage, AC current, and resistance calculations are performed in exactly the same
manner using the pertinent specifications, ranges, and input signal values.

Keithley 2110 Specifications

General

Model	2110
DC Voltage Range	100 mV to 1000 V
AC Voltage Range	100 mV to 750 V
Continuity	Yes
Diode Test	Yes
Category	Digital Multimeter
Display	5.5 digit
DC Current Range	100 µA to 3 A
AC Current Range	100 µA to 3 A
Resistance Range	100 MΩ
Frequency Range	3 Hz to 300 kHz
Frequency Accuracy	0.01% + 1 count
Capacitance Range	1 nF to 100 µF
Capacitance Accuracy	1% + 5 counts
Connectivity	USB, GPIB (optional)
Dimensions	88 mm
Power Supply	100 V to 240 V AC, 50/60 Hz
DC Voltage Accuracy	±0.012% + 2 counts