Agilent Technologies B2901 Manual de usuario

Agilent B2901/02/11/12A Precision Source/Measure Unit

How to make a list sweep measurement

This material shows how to perform a list sweep measurement through an example of the Photovoltaic Cell IV

measurement. Figure 1 illustrates the connection and condition supposed in the example of measuring Photovoltaic Cell

using the B2901/02/11/12A.

Figure 1. Connection and condition supposed in the example

Figure 2 shows the timing chart for the list sweep measurement with the front panel operation. In this case, the specified

source value is sourced immediately after turning on . Then, when you press , the instrument will

make a list sweep measurement. If it is necessary, you can specify any measurement trigger delay time which is the wait

time after sourcing each source value and before making a measurement. The measurement time consists of

Measurement Speed and some overhead time. Measurement Speed is the parameter specified by the user. Overhead

time includes the time to change the measurement range, etc.

Figure 2. Timing chart for the list sweep measurement

High Force

Low Force

B2901/02/11/12A

DUT

Output ON

Source Value

Output

Off State

:Measurement

V or I

Time

V1 Value

Press

Trigger

Internal

Trigger

Internal

Trigger

V2 Value

TMD

TPTPTP

TMD TM

TMD : Measurement Trigger

Delay Time

: Trigger Period

: Measurement Time

V3 Value

V4 Value

Internal

Trigger

Agilent B2901/02/11/12A Precision Source/Measure Unit

Preparing the list data in advance

When you source some complicated waveform with the List Sweep Mode of the B2901/02/11/12A, it is convenient to

create the data list on a PC using the software of your choice and then transfer the data list file to the B2901/02/11/12A

via USB flash memory. TXT, PRN and CSV file format are available for data list file.

Step 1. Develop CSV file which includes the following source list data.

(From 0 to 0.7 with 0.1 step, and from 0.71 to 1.30 with 0.01 step, and from 1.4 to 1.7 with 0.1 step)

Step 2. Save CSV file as “listdata.csv”to the root folder of your USB flash memory device.

Step 3. Attach the USB flash memory device which “listdata.csv”file is saved to the USB port on the front panel of the

B2901/02/11/12A.

Agilent B2900A Quick I/V Measurement Software is also available to edit the data list for List Sweep Mode. Please refer

to the Agilent Web Site below for the detailed information about Agilent B2900A Quick I/V Measurement Software.

http://www.agilent.com/find/b2900a

Agilent B2901/02/11/12A Precision Source/Measure Unit

Performing a list sweep measurement

Step 1. Press repeatedly until Single View for Channel 1 is shown in the display.

Step 2. Press to edit the source function, and then select to set the source function to the voltage

source.

Step 3. Press to edit the source value, and then enter 0 V to set the source value to 0 V.

Step 4. Press to edit the limit value, and then enter 100 mA to set the limit value to 100 mA.

Step 5. Press to configure the measurement parameter, and then select to set the measurement

parameter to the current.

(1) Press Mode (2) Press VOLTS (V)

(1) Press Source (2) Enter Source Value

(1) Press Limit (2) Enter Limit Value

(1) Press Measure (2) Press AMPS (I)

Agilent B2901/02/11/12A Precision Source/Measure Unit

Step 6. Press to change the keys shown in Assist keys, and then press to show Sweep

Sub-Panel.

Step 7. Press , then press to change the keys shown in Assist keys.

Step 8. Press to turn on List Sweep Mode. After turning on List Sweep Mode, you can see Source Shape

which shows the list sweep mode.

Step 9. Rotate and press to edit Start value and press to open Load List Sweep Data dialogue.

(1) Press Show Sweep (2) Sweep Sub-Panel appears

(2) Press More...(1) Press

(1) Press LIST Source Shape

(1) Rotate and press

Start value

to edit (2) Press Load

Agilent B2901/02/11/12A Precision Source/Measure Unit

Step 10. Rotate and press to select “listdata.csv”file, and then press to load “listdata.csv”file.

Now you have configured List Sweep Source Setup and can see the parameters bellow.

Step 11. Press repeatedly until Graph View is shown in the display.

Step 12. Press to source the voltage, and then press to perform a measurement.

(The status information will show during the measurement.)

Step 13. Press to adjust the scale of the graph after finishing the measurement. Now you can see the

measurement result on the GUI of the B2901/02/11/12A as bellow.

(2) Press OK to load listdata.csv file

(1) Rotate and press

listdata.csv file

to select

Agilent B2901/02/11/12A Precision Source/Measure Unit

Step 14. Rotate and press to edit the Y-axis maximum value, and then enter 0 A to adjust the graph scale.

Step 15. Rotate and press to edit the Y-axis minimum value, and then enter -80 mA to adjust the graph scale.

Now you can see the measurement result scaled on the GUI of the B2901/02/11/12A as bellow.

(2) Enter the scale such as 0 A(1) Rotate and press

Y-axis maximum value

to select

(2) Enter the scale such as -80 mA(1) Rotate and press

Y-axis minimum value

to select

Agilent B2901/02/11/12A Precision Source/Measure Unit

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 GUI of the B2901/02/11/12A 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 repeatedly until Single View for Channel 1 is shown in the display.

Step 2. Press to edit the measurement speed, and then select to set the measurement speed to

NORMAL. (If you can’t see in Assist keys, press to change the keys shown in Assist keys.)

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 B2901/02/11/12A performs the current

measurement using 1 uA current minimum measurement range with AUTO range operation. With AUTO range operation,

the B2901/02/11/12A 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. Press to show Range Sub-Panel. (If you can’t see in Assist keys, press to

change the keys shown in Assist keys.)

(1) Press Speed (2) Press NORMAL

(1) Press More... (if necessary) (2) Press Hide Sweep

Agilent B2901/02/11/12A Precision Source/Measure Unit

Step 2. Rotate and press to edit the current minimum measurement range, and then select to set

it to 10 nA.

If you’d like to fix the measurement range, you can select FIXED range operation as below.

Step 3. Rotate and press to edit the current measurement range operation. Then Select to set the

current measurement range operation to FIXED.

Configuring the measurement trigger delay time

The trigger parameters including the measurement trigger delay time and the trigger period can be displayed in Trigger

Sub-panel in Single View, although Range Sub-Panel is shown at this moment. In the default setting, the trigger type is set

to the automatic trigger type (AUTO) so that you don’t need to specify these trigger parameters.

If you’d like to specify the measurement trigger delay time, take the following steps.

Step 1. Press to show Trigger Sub-Panel. (If you can’t see in Assist keys, press to

change the keys shown in Assist keys.)

(1) Rotate and press

Current Minimum Measurement Range

to edit

(2) Press 10nA

(2) Press FIXED(1) Rotate and press

Current Measurement Range Operation

to edit

(1) Press More... (if necessary) (2) Press Show Trigger

Agilent B2901/02/11/12A Precision Source/Measure Unit

Step 2. Press to edit the trigger type, and then select to set the trigger type to MANUAL.

Step 3. Rotate to select Channel 1 Trigger Parameters and set them up as below.

(Source Trigger Count: 72, Measurement Trigger Count: 72, Measurement Trigger Delay Time: 100ms)

Note) Source and Measurement Trigger Count should be the same number as Sweep Points.

Now you’ve configured 100 ms measurement trigger delay time.

Configuring the trigger period

If you need to control the source and measurement period strictly, the trigger period is useful to make it. In order to specify

the trigger period, take the following steps.

Step 1. Rotate and press to edit the trigger type, and then select to set the trigger type to TIMER.

(2) Press MANUAL(1) Press

(2) Press TIMER(1) Rotate and press

Trigger Type

to edit

Agilent B2901/02/11/12A Precision Source/Measure Unit

Step 2. Rotate to select Channel 1 Trigger Parameters and set them up as below.

(Source Trigger Period 400 ms, Measurement Trigger Period: 400 ms)

Note) Source and Measurement Period should be the same as each other.

Now you’ve configured 400 ms trigger period. However, please note that FIXED current measurement range operation will

be used to control the trigger period strictly. The measurement range is selected by Limit value. In this example, 100 mA

measurement range will be used. If using AUTO measurement range operation is prior to controlling the trigger period

strictly, you may specify MANUAL trigger type with AUTO source and measurement trigger source by the following steps.

Step 3. Press to edit the trigger type, and then select to set the trigger type to MANUAL.

Step 4. Rotate to select Channel 1 Trigger Parameters and set them up as below.

(Source Trigger Source: AUTO, Measurement Trigger Source: AUTO)

(2) Press MANUAL(1) Rotate and press

Trigger Type

to edit

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