11 | Keysight | Low Current Semiconductor Measurements
Using the B2980A Series Ammeter - Technical Overview
Example 2. LED forward diode I/V characteristics
(continued)
Step 5. Press the [Single] key. The Trigger indicator changes to [ARM], and the sweep measurement begins.
By pressing the [Auto Scale] function key, intermediate measurement data can be seen on the 10 X-Y graph.
Step 6. An I/V curve of the LED’s forward characteristics is displayed with the Y-axis using a linear scale.
Select and click on the Y-axis scale [LINEAR] and change it to [LOG] by pressing the [LOG] assist key.
Step 7. The Y-axis is changed to a log scale.
You can easily export the measurement data in CSV format to a PC using the B2985A/87A’s USB port.
Conclusion
The Keysight B2980A Series Picoammeter/Electrometer ammeter is an easy-to use, high performance and stable picoammeter that
can measure down to 100 aA with 10 aA effective resolution.The B2980A Series employs a loating ammeter design, which provides
considerable freedom to use the ammeter in various ways depending on the measurement requirements. The user friendly graphical
interface supports four viewing modes: Meter View, Graph View, Histogram View and Roll View. When used with the Null and Filter
functions these features enable you to optimize the quality of your measurement data.
Using the B2985A/B2987A’s built-in voltage source, it is easy to plot the I/V characteristics of two terminal semiconductor devices.
Auto Scale fits the I/V X-Y
plot to the display
Click on the [LINEAR] scale using .
Press key to change the Y axis to the
LOG scale.
1.00E-14
1.00E-12
1.00E-10
1.00E-08
1.00E-06
1.00E-04
1.00E-02
1.00E+00
0.00E+00
5.00E-01
1.00E+00
1.50E+00
2.00E+00
A
n
o
d
e
cu
rr
en
t
(A
)
Forward voltage (V)
LED I/V characteristics
LED's forward I/V characteristics (Log scale)
Spread sheet graph plotted on a PC.
