How to source current without affecting the bias condition

How to source current without affecting the bias condition
Agilent B2900A Series Precision Source/Measure Unit
How to measure current without affecting the bias condition
In the default setting, the low terminal of the channels in the Agilent B2900A Series is grounded internally. However, the
low terminal can be disconnected from the ground and kept floating. Configuring the low terminal state to FLOATING and
sourcing 0 V from the channel make it possible to make a current measurement without affecting the bias condition at the
measurement point.
B2900A Series
A
-
High Force
In
DUT
V
Common
Step 1.
Step 2.
Low Force
If you aren’t on the top of the Function menu, press
Press
Out
repeatedly to return to the top level.
On the top level of the Function menu
Any tree structure can’t be seen
In the middle level of the Function menu
Some tree structure can be seen
,
, and then press
to open Output Connection dialogue.
(1) Press Config
(2) Press Source
(3) Press Connection
Step 3.
Press
and select
(1) Press
to specify the channel which the low terminal state is configured for.
(2) Press Ch 1
Agilent B2900A Series Precision Source/Measure Unit
Step 4.
Press
and select
, and then press
to configure the low terminal state to
FLOATING.
(1) Press
(2) Press FLOAT
(3) Press OK
If the low terminal state of the channel is set to FLOATING, you can see the status indicator on GUI as below, although no
indicator can be seen on being set to GROUNDED.
GROUNDED
Step 5.
Press
Step 6. Press
source.
repeatedly until Single View for Channel 1 is shown in the display.
to edit the source function, and then select
(1) Press Mode
Step 7.
Press
FLOATING
to set the source function to the voltage
(2) Press VOLTS (V)
to edit the source value, and then enter 0 V to set the source value to 0 V.
(1) Press Source
(2) Enter Source Value
Agilent B2900A Series Precision Source/Measure Unit
Step 8.
Press
to edit the limit value, and then enter 100 mA to set the limit value to 100 mA for example.
(1) Press Limit
(2) Enter Limit Value
Step 9. Press
to configure the measurement parameter, and then select
parameter to the current.
(1) Press Measure
Step 10. Rotate and press
to set the measurement
(2) Press AMPS (I)
to edit the voltage source range operation. Then Select
to set the voltage
source range operation to FIXED.
(1) Rotate and press
to edit
Voltage Source Range Operation
Step 11. Rotate and press
(2) Press FIXED
to edit the voltage source range, and then select
(1) Rotate and press
Voltage Source Range
to edit
(2) Press 200mV
to set it to 200 mV.
Agilent B2900A Series Precision Source/Measure Unit
Step 12. Press
Step 13. Press
to switch on its output terminal.
to perform a measurement repeatedly. Now you can see the measurement result on the
B2900A Series’ GUI as bellow.
Configuring the measurement speed
In the default setting, the instrument selects the appropriate measurement speed and range automatically to get the fine
accuracy. However, you can also specify these parameters on the B2900A Series’ GUI to meet a variety of the
requirement to the measurement conditions.
For example, let’s try to change the measurement speed to NORMAL to make a measurement more carefully. If you select
NORMAL, the aperture time is set to 1 PLC. Here, PLC stands for power line cycle and the specified number of power line
cycles is used per a measurement.
Step 1.
Press
to edit the measurement speed, and then select
NORMAL. (If you can’t see
(1) Press Speed
in Assist keys, press
to set the measurement speed to
to change the keys shown in Assist keys.)
(2) Press NORMAL
Agilent B2900A Series Precision Source/Measure Unit
Configuring the measurement range operation
The parameters which configure the measurement range operation can be displayed in Range Sub-panel in Single View,
although Sweep Sub-Panel is shown at this moment. In the default setting, the B2900A Series performs the current
measurement using 1 uA current minimum measurement range with AUTO range operation. With AUTO range operation,
the B2900A Series selects the proper range for the measurement with specified minimum measurement range so that
you don’t need to take care about it. To know how to change the measurement range setting, try to configure to use 10
nA current minimum measurement range with AUTO range operation.
Step 1.
Rotate and press
to edit the current minimum measurement range, and then select
to set
it to 10 uA.
(1) Rotate and press
to edit
Current Minimum Measurement Range
(2) Press 10uA
If you’d like to fix the measurement range, you can select FIXED range operation as below.
Step 2.
Rotate and press
to edit the current measurement range operation. Then Select
current measurement range operation to FIXED.
(1) Rotate and press
to edit
Current Measurement Range Operation
(2) Press FIXED
to set the
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