Fluke 5730A User Manual

Front-Panel Operation
Instrument Setup 4
4-55
The second method is called “true value”. Both methods can be used in this Calibrator.
The nominal method of error calculation uses the formula:
reference value – edit value
reference value
The nominal method is useful to check the error of the Calibrator itself, when its
performance is verified against a more accurate measuring device.
The true value method of error calculation uses the formula:
Reference value – edit value
edit value
With either the nominal or true value method, small changes in output value result in a
calculated error that is the same. In the example above, the display will show the error as
-30.0 ppm.
The true value method is useful for large changes in output value. For example, if
10.0000 V is applied to an analog meter, and then the Calibrator output is adjusted to
11.0000 V so that the analog meter now reads exactly 10 V, the true value method will
show:
nominal= +10.0000 V
rel err= -9.0909 %
-9.0909 % represents the relative error of the analog meter when compared to the true
value (11.0000 V in this case).
To select the UUT error calculation method:
1. Touch Setup>Instrument Setup.
2. Touch Error Reference until it shows the desired choice. The choices are "Nominal
Value" or "True Value."

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)