Keysight Technologies B2901A Manuale utente

DEMO GUIDE

Making Current-Voltage

Measurement Using SMU

B2901A/02A/11A/12A Precision Source/Measure Unit

Required Instrument and Accessories

Keysight 11059A Kelvin Probe Set and LED Lamp are equipped as a demo kit with a demo unit

of the Keysight B2900A Series of SMU.

Keysight 11059A Kelvin Probe Set

LED Lamp

Keysight B2901A/02A/11A/12A

Precision Source/Measure Unit

The Keysight B2901A/02A/11A/12A

Precision Source/Measure Units are

compact and cost-effective bench-

top Source/Measure Units (SMUs)

with the capability to output and

measure both voltage and current.

The B2901A/02A/11A/12A enables

you to make a wide range of current

versus voltage (IV) measurements more

accurately and quickly than ever before. In

addition, the B2901A/02A/11A/12A comes

with an intuitive graphical user interface

(GUI) and PC-based application software

that make it easy for you to begin making

productive measurements immediately.

This demonstration guide shows how

easily basic voltage current measurement

can be made using the Keysight

B2901A/02A/11A/12A.

The demonstration includes not only a

single point measurement where current is

measured with sourcing constant voltage,

but also a sweep measurement where

currents are measured each voltage with

stepping the source voltage.

Introduction

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Measurement concept

– Sourcing voltage to turn the LED on.

– Limit value feature prevent the instrument from sourcing too much

even if Source value is increased.

– Stepping voltages from start voltage to stop voltage with making

current measurement at each voltage step.

– Voltage steps are sourced from an internal voltage source.

– Current measurements are made by an internal current meter.

– The complicated measurement as above can be configured and

made easily with Intuitive Graphical User Interface (GUI).

– Current-voltage curve can be seen easily by changing View mode.

Setup

1. Connect the yellow banana plug to Ch 1 Low Force Terminal.

2. Connect the red banana plug to Ch1 High Force Terminal.

3. Clip the LED cathode terminal with the black gold-plated tweezers.

4. Clip the LED anode terminal with the red gold-plated tweezers.

0.00

0.05

0.10

0.15

0.20

0.0 0.5 1.0 1.5 2.0 2.5 3.0

Current [A]

Voltage [V]

LED Current-Voltage Characteristics

High Force

Low Force

B2900A Series

VSource

IMeas

LED

Ch 1

Cathode

Anode

Red (11059A)

Yellow (11059A) Black (11059A)

Red (11059A)

Page 3

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Objective

This demo shows how easily a

current-voltage measurement

can be made with the B2900A

Series through the Light Emitting

Diode (LED) characteristics

measurement.

Procedure overview

1. Change View mode to

Single View

2. Source voltage to turn on

the LED

3. Make measurement of the

LED current

4. Turn off the channel output

LAB 1: Turn on the LED and Measure LED Current

Demonstration

1. Change View mode to Single View

a. Press repeatedly until Single View

for Channel 1 is shown in the display.

2. Source voltage to turn on the LED

a. Press to edit Channel 1 Source value, and then enter 2 V to set

Source value to 2 V.

b. Press and set Channel 1 Limit value to 100 mA.

c. Press Ch1 to turn on Channel 1 Output relay.

(1) Press Limit (2) Enter 100 mA

(1) Press Source (2) Enter 2 V

You will see LED is turned on because

voltage is sourced by the channel

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d. Press and rotate until Source value achieves 3 V. You will

see the measurement parameters turn orange, which means they reach

Limit value.

e. Rotate until Source value achieves 2 V and then press to

set Source value to 2 V.

3. Make measurement of the LED current

a. Press to perform a single point measurement.

b. Press to repeat single point measurements periodically.

LAB 1: Turn on the LED and Measure LED Current (continued)

(1) Press Source and rotate

until Source value achieves 3 V

Measurement parameters

will turn orange

(1) Rotate

achieves 2 V

until Source value (2) Press

to 2 V

to set Source value

Measurement parameters are updated

whenever Trigger Button is pressed

Measurement parameters

are updated periodically

“Auto” indicator is turned on

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LAB 1: Turn on the LED and Measure LED Current (continued)

c. Press to stop making measurements periodically.

4. Turn off the channel output

a. Press to edit Channel 1 Source value, and then enter 0 V to set

Source value to 0 V.

b. Press Ch1 to turn off Channel 1 Output relay.

“Auto” indicator is

turned off

(1) Press Source (2) Enter 0 V

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Objective

This demo shows how easily

current-voltage characteristics

can be obtained with the B2900A

Series through the Light Emitting

Diode (LED) characteristics

measurement.

Procedure overview

1. Change View mode to Single

View

2. Configure the condition to

source and measure

3. Change View mode to Graph

View

4. Perform the measurement

5. View the measurement result

graph

6. Change the graph scale

7. View the list of the measure-

ment data

Lab 2: Make Current – Voltage (I – V) Sweep Measurement to get

LED I – V Characteristics

Demonstration

1. Change View mode to Single View

a. Press repeatedly until Single View for

Channel 1 is shown in the display.

2. Configure the condition to source and measure

a. Press , then press to set Channel 1 V/I Source Function

to V Source. (If can’t be found on the Assist keys, press to

change the keys.)

b. Press and set Channel 1 Limit value to 100 mA.

c. Press , then press to set Channel 1 Measurement

Parameter to Current.

(2) Press VOLTS (V)

(1) Press Mode

(1) Press Limit (2) Enter 100 mA

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

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Lab 2: Make Current – Voltage (I – V) Sweep Measurement to get

LED I – V Characteristics

d. Press , and then press to show Sweep Sub-Panel.

e. Press , then press to turn on Single Linear Sweep Mode.

After turning on Single Linear Sweep Mode, you can see Source

Shape which shows the single linear sweep mode.

f. Rotate to select Channel 1 Sweep Parameters and set them up as

below. (Start: 0 V, Stop: 2 V, Points: 101, Step: 20 mV)

3. Change View mode to Graph View

a. Press repeatedly until Graph View is

shown in the display.

(1) Press More… (2) Press Show Sweep

(1) Press

and then press LINEAR SINGLE Source Shape

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4. Performing the measurement

a. Press Ch1 to turn on Channel 1 Output relay, and then press

to perform a sweep measurement. During the measurement, the status

information will show

5. View the measurement result graph

a. Press to adjust the scale of the graph after finishing the

measurement.

6. Change the graph scale

a. To change the graph scaling of Y-axis from LINEAR to LOG, rotate and

press to select Y-axis scaling.

b. To change the graph scale value of Y-axis, rotate and press to

modify Y-axis scale value.

Lab 2: Make Current – Voltage (I – V) Sweep Measurement to get

LED I – V Characteristics

(2) Press LOG(1) Rotate

then press

to select Y-axis scaling

(2) Enter the scale such as 1 nA(1) Rotate

value then press

to select Y- axis scale

Page 9

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7. View the list of the measurement data

a. If you’d like to see the list of the measurement result, press,

then press to open Measure Result dialogue.

b. Rotate and press to select List Area. Then rotate to scroll

the data list.

Lab 2: Make Current – Voltage (I – V) Sweep Measurement to get

LED I – V Characteristics

(1) Press Result

(2) Press Measure

(1) Rotate and press

List Area

to select (2) Rotate

to scroll the list

or press Assist key

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