Fluke 5320A User Manual

Calibrating Instruments
Setting the Loop and Line Impedance Output 4
4-15
Note
The maximum residual impedance correction value that can be entered
manually is between 0 and 10
Ω .
To use this manually entered value, you must select the manual residual impedance
compensation mode as described in the “Selecting the Residual Correction Mode” section
earlier in this chapter. When the Residual Impedance Correction mode is set to
MANUAL, the stored manual value entered in this section is added to the selected loop
or line impedance value and their sum displayed as the calibration value.
Setting the Scanned Residual Impedance Correction Value
The Calibrator has a built-in circuit for measuring the actual residual impedance. The
SCAN function provides a residual impedance value that not only includes the power line
socket, but the power line cord impedance, the appliance entry contact resistance, and
some of the interconnection inside the Calibrator. The lowest residual line or loop
impedance is limited by the Calibrator’s measured residual line or loop impedance. The
measured residual impedance is added to the selected resistor value.
Note
If the loop or line residual impedance exceeds 10
Ω , an error message is
displayed and the scan mode is turned off.
To SCAN for a residual impedance correction value:
1. Press the Setup softkey.
2. Select either Loop Impedance or Line Impedance
3. Using the cursor keys or rotary knob, move the cursor to Line imp. SCAN value
(Loop imp. SCAN value for Loop impedance function) and either press the
Select softkey or press in on the rotary knob.
The Calibrator automatically measures the residual impedance without connecting
the front-panel connectors and stores the value. The SCAN impedance value cannot
be entered manually.
Note
The Calibrator scans residual Line and Loop impedance only as a
symmetrical parameter, that is, both positive and negative half-wave
configurations are measured and the average value displayed.
Note
When the SCAN function is used in the Loop or Line impedance mode, 2.5
amps of current flows between the L and N mains wires. Therefore, this
function can be used on mains with residual current circuit breakers.
4. Using the cursor keys or rotary knob, highlight Loop imp. correction and either
press the Select softkey or press in on the rotary knob.
5. Using the cursor keys or rotary knob, highlight MAN and either press the Select
softkey or press in on the rotary knob.
6. Press the Exit softkey repeatedly to return to the main screen.
To use this scanned value, you must select the SCAN or COMP residual impedance
compensation mode as described in the Selecting the Residual Correction Mode section
earlier in this chapter. When the Residual Impedance Correction mode is set to SCAN,

Fluke 5320A Specifications

General

Brand	Fluke
Model	5320A
Category	Test Equipment
Language	English