Introduction and Specifications
Introduction 1
1-3
Introduction
The Fluke 5320A and 5320A/VLC are Multifunction Electrical Tester Calibrators
(hereafter referred to as the Calibrator), designed for full calibration and testing of
electrical safety testers. Some examples of these testers are:
• Megohm meters
• Ground bond testers
• Loop testers
• RCD testers
• Appliance testers
• Electrical installation testers
• Earth resistance meters
• High voltage safety testers (Hipots)
Calibrator Functions
The Calibrator performs output and measurement functions.
Output Functions:
• Insulation resistance
• Earth resistance and continuity
• Loop, line, and ground bond resistance
• Residual Current Device (RCD) and Ground Fault Circuit Interrupter (GFCI) testing
• Leakage current source
• AC/DC voltage generation (5320A/VLC only)
Measurement functions:
• AC/DC voltage and current measuring
• Load current and power consumption
Function Descriptions
The following sections describe various functions of the Calibrator. Unless otherwise
noted, the descriptions apply to both 5320A and 5320A/VLC.
Insulation Resistance
For insulation resistance calibration, the Calibrator acts as a high resistance source from
10 kΩ to 10 GΩ with 4½ digit resolution. A single value 100 GΩ selection is available as
well. Depending on the selected resistance value, maximum applied test voltages range
from 50 to 1500 volts peak.
Earth Resistance and Continuity
The Calibrator sources low resistance values from 100 mΩ to 10 kΩ with 3½ digits of
resolution. This function is used in either 2-wire or 4-wire mode to calibrate continuity
testers and earth resistance testers that source currents from 5 to 400 mA.
Loop, Line and Ground Bond Resistance
The Calibrator sources high power rated low resistance standards from 25 mΩ to 1.8 kΩ,
which are especially suited for loop impedance, line impedance, and ground bond
resistance testing. The Calibrator senses and displays Unit Under Test (UUT) test
conditions, types of test current, and current levels up to 40 amps. In the 5320A/VLC, an