Performance Verification
N2780/1/2/3B User’s Guide
43
Performance Verification
The procedure in this section measures the accuracy of the current probe.
Test Coils
Depending on your current probe, construct a coil using transformer wire with the
following number of turns. The coil should be about 4 inches (10 cm) in diameter.
N2780B; . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 turns
N2781B; . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 turns
N2782B; . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 turns
N2783B; . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 turns
Table 7
Required Test Equipment
Description
Critical Specifications
Recommended
Probe Power Supply
No substitute
Keysight N2779A
Digital Multimeter (DMM)
AC/DC voltage and current measurement accuracy
better than ±0.1% of reading at 10 mA
Input resistance in AC/DC voltage mode
¡
1 M
Ω
Keysight 34401A
Signal Generator
DC to 66 Hz sine waves able to generate more than 10A
in the test coil (e.g. an inductive load).
Keysight 6813B
Adapter
BNC (f) to dual stacking banana plug
Pomona 1269
Test Coil
5, 50, or 77 turns. (See coil construction instructions in
this section.)
16-AWG 155C CU round magnetic
wire (NEMA MW 35-C); Red enamel
(transformer wire)
