Making Measurements Introduction - Keysight N2820A User Manual

2 Making Measurements
Introduction
Introduction
N2822A and N2824A
Probe Heads
Description
R Resistor
SENSE
R Tolerance
SENSE
a
Maximum Power Dissipation
Current Range
Added Benefit
a Temperature coefficient is 20 ppm / °C
CAUTION
Probe Head
20
The probes are supplied with three interchangeable R
heads: N2822A, N2824A, and N2825A. To begin using the probe,
refer to
the relative merits of using the three different heads with the
different sensor leads.
The N2822A and N2824A heads include built-in internal R
resistors. Because the oscilloscope recognizes when these probes
are connected, the oscilloscope automatically knows the value of
the R
SENSE
Table 3
20 mΩ
±1%
500 mW
250 µA to 5A
Smaller voltage drop (lower burden voltage).
The maximum sensor resistor power rating is 500 mW. The maximum
acceptable average current for the N2822A is 5 A
A .
rms
N2825A
The N2825A user-defined head does not include an R
and is selected in situations when you want to use your own
external DUT-mounted R
Probe Heads", provides additional information on using the
N2825A head.
"Quick Start" on page 23.
resistor when calculating measurements.
Description of Heads
N2822A
SENSE
Figure 3 on page 21 illustrates
N2824A
100 mΩ
±1%
500 mW
50 µA to 2.2A
For higher sensitivity (ie. lower noise).
and N2824A is 2.2
rms
resistor. Chapter 3, "Using N2825A
N2820/1A User's Guide
probe
SENSE
SENSE
resistor
SENSE