Fluke 5730A User Manual

Front-Panel Operation
Introduction to Offset, Scale, and Linearity Errors 4
4-37
The example in Figure 4-8 assumes no offset error. The formula for scale error yields:
Scale Error=
19.9 -19.903
= -0.000151= -0.0151 %
19.9
Calibrator Setting
0
Meter Reading
19.903 V
19.9 V
Scale
Error =
-3 mV
19.9 V
Ideal
Actual
hhp018.eps
Figure 4-8. Scale Error
Linearity Error
Linearity error occurs when the response curve of a meter deviates from a straight line.
This type of error is measured by fixing zero and near-full-scale endpoints on the
response curve, drawing a line through the points, then measuring how far the meter
response deviates from the straight line at various points. The error value is computed
relative to the selected full-scale point. The formula for linearity error is:
Linearity Error=
(Nominal setting) – (Adjusted 5730A Setting)
(Nominal Full Scale)
Where the “nominal setting” is calculated by subtracting the offset error and a
proportional part of the scale error.

Fluke 5730A Specifications

General

Type	Multifunction Calibrator
Resistance Range	0 to 1 GΩ
AC Voltage Frequency	10 Hz to 1 MHz
Display	Color LCD
Interfaces	RS-232, Ethernet
Weight	18 kg
DC Voltage Range	0 to ±1100 V
Dimensions	172 mm H x 432 mm W x 457 mm D (6.8 in H x 17 in W x 18 in D)