Fluke 5320A User Manual

Applications
Calibrating Residual Current Device (RCD) Testers 7
7-19
6. Press O.
The Calibrator connects the L and N terminals directly to the mains voltage and waits
for an external load to be connected by the UUT. If no load is sensed within 10
seconds, the Calibrator will switch to STBY.
7. On the UUT, push Start.
The Calibrator measures the current, after the nominal trip current is reached, the
Calibrator starts a timer, and then disconnects the output terminals when the nominal
trip time has elapsed.
8. Compare the nominal trip time on the Calibrator display with the trip time displayed
on the UUT.
Calibrating using 1.4XI, 2 X I, and 5 X I Multipliers
The 1.4 X, 2 X, and 5 X multipliers are used to test RCDs under current overloading
conditions, with 1.4 times, 2 times or 5 times higher current than the nominal current
setting. To perform an RCD trip time calibration with 1.4 X, 2 X, or 5 X multiplier:
1. Using Figure 7-17, connect the UUT to the Calibrator’s L, PE, and N terminals.
2. Press R.
3. If RCD Trip Time does not already appear in the Output area of the display, press
the Mode softkey. Then, using the cursor keys or rotary knob, highlight Trip Time
and select it by pressing the Select softkey or pushing in on the rotary knob.
4. On the UUT, set the following parameters:
I multiplier set to 1.4XI, 2xI, or 5xI
Nominal trip current (I
TRIP
) set.
S or G type RCD not set
AC or DC sensitive testing not set
Phase polarity not set
Maximum touch voltage not set
Note
Not all parameters can be accessed on the UUT, however, nominal trip
current must always be set or known.
5. On the Calibrator, make the following settings:
Nominal trip time in ms
Nominal trip current (I
TRIP
) set to the same value the RCD is set to.
I multiplier coefficient set to 1.4xI, 2xI, or 5xI, same as that on the UUT.
I level coefficient. Default set to 90%.
Series resistance of touch voltage will be simultaneously tested. The default
series resistance is set to the minimum value.
6. Press O.
7. On the UUT, push Start.
The Calibrator measures the current. After the nominal trip current is reached, the
Calibrator starts a timer, and then disconnects the output terminals when the nominal
trip time has elapsed.

Fluke 5320A Specifications

General

Brand	Fluke
Model	5320A
Category	Test Equipment
Language	English