满足光伏组件IEC61215各项试验...

Current-Voltage Measurement System （IV Tester） -
20W Version for Continuous Solar Simulators
Main Features:
? Designed for use with continuous or pulse solar simulators
? An output trigger TTL signal is used to synchronize its data acquisition with pulse solar
simulators
? Variable resistive load
? Max Electrical Power Reading: 20W base model, 60W high power model
? Base Model Voltage range 200V （can be modified with additional shunt to suit
application）
? Base Model Current range 1A （can be modified with additional coil to suit application）
? High Power Model Voltage range 60V （can be modified with additional shunt to suit
application）
? High Power Model Current range 3A （can be modified with additional coil to suit
application）
? Separate terminal interface for voltage ａnd current measurements
? Interfaces to PC via GPIB cable for display ａnd data storage （hence GPIB card required
in computer）
? Saves each IV curve dataset in separate ASCII text file
? I-V range selectable
? Number of sample points selectable （between 10-100 points）
? Sci-IVTest Windows based control software
Parameters Measured by IV Software
Voc, Ioc
Vsc, Isc
Vmax, Imax, Pmax
efficiency （%）
Light ａnd dark I-V characteristics
上海市闵行区莘朱路903号（甲）厂区,201100
Tel: 021-54387376,54380568 Fax: 021-54997016 E-mail:br.sci@263.net http://www.br17.com
上海泊睿科学仪器有限公司
Voc Slope （similar to Rs）
Rp or Rshunt （system measures slope near Isc for this value）
FF or Fill Factor
JSc （mA/cm2）
Forward ａnd Reverse Sweep Feature
SKU: SSIVT-20C
The SSIVT is an electrical current-voltage measurement system used to characterize
photovoltaic cell performance. This current-voltage tester works by sampling various current
versus voltage combinations of the photovoltaic cell with a variable impedance load. The
performance of the photovoltaic cell is determined by measuring this output I-V relationship
while it is being illuminated by light. This relationship is typically called an "I-V curve" ａnd can
be obtained by exposing the photovoltaic cell to a constant level of light while varying an
external impedance load such that its current-voltage values change. Since multiple I-V data
points are required to create an I-V curve, an external trigger function model is available for
use with pulse solar simulators. This allows the tester to create multiple sequential pulses
（typically 10-100 points selectable） to complete the IV curve measurements. Universal input
100-240VAC, 50/60Hz. Software ａnd GPIB Board is included. An external computer （sold
separately） such as the PC computer controller is required to control this current-voltage
measurement system.
Purpose of Current Vs Voltage Measurement Test
A solar cell may be operated over a wide range of voltage ａnd current combinations, but there
is generally an optimum combination for maximum energy collection efficiency. By varying an
external load resistance from zero to infinity, the optimum I-V combination where the solar cell
delivers the most power can be found.
Current ａnd Voltage Measurement Range
The standard I-V Test system can measure electrical power from photovoltaic cells up to 20W.
The voltage envelope is limited to 200V ａnd the current is limited to 1A. A higher powered
60W version is available where the voltage is limited to 60V ａnd the current is limited to 3A.
For higher loads, shunts to measure a portion of the current can be used. In general, the
limitation of the standard model is the 1A current limit. If your solar cell can generate more
current than 1A, then we recommend upgrading to the 60W model.
Voltage Scaling Factor
Although the maximum voltage of the base unit is 200V, the software can rescale its scanning
range to 2V, 10V, 20V or 200V. Once the scale is selected, the maximum number of I-V
measurement points that can be taken in that selected range is 100 points.
Current Density - Voltage （J-V） Measurements
The software currently only measures I-V characteristics ａnd JSc （mA/cm2）, but other J-V
上海市闵行区莘朱路903号（甲）厂区,201100
Tel: 021-54387376,54380568 Fax: 021-54997016 E-mail:br.sci@263.net http://www.br17.com
上海泊睿科学仪器有限公司
values can be derrived as J=I/area. The software outputs the I-V characteristics in an ASCII
file which can then be read to derrive current density values.
Software
Software is written in Labview, but a Labview Runtime engine allows it to run on Windows XP
without the Labview development toolkit.
System Notes
The I-V Measurement System sweeps the IV curve with an automatically adjustable resistive
load ａnd records multiple I-V data points along the way. The voltage ａnd current ranges are
software selectable ａnd so is the number of points taken, from 10-100 points depending on
the time length of the test allowable. The I-V data point values are then recorded ａnd plotted
on a computer display ａnd saved in an ASCII text file. The points are selected by voltage,
hence the voltage readings are evenly spaced.
I-V Measurement Basics
Fill Factor: Fill factor refers to the "squareness" of the I-V curve. It describes how closely
matched the voltage is at its maximum power point ａnd the current is also at its maximum
power point. The higher the fill factor match, the more square the I-V curve.
Conversion Efficiency: The conversion efficiency of a solar cell is the percentage of light
energy that gets converted to electrical power.
References:
The U.S. Department of Energy maintains a good website on how to use I-V measurement
systems in solar cell testing. Please see www.eere.energy.gov/solar/current_voltage.html
Technical Specifications
? Base unit 200V max. （scale to 2V or 10V, but 20V ａnd 200V scales possible please ask）
? Dwell time （wait time between each I-V reading） - programable, but cannot be below
3ms
? Number of I-V scanned points - 10 to 100 programable
? Hardware Voltage Resolution: 50μv @ 2V scale, 500μV @ 20V scale （accuracy per
reading）
? Hardware Current Resolution: 50μA @ 1A scale （accuracy per reading）
? I-V Measurement Sweep Resolution: （voltage scale selected / number of I-V scanned
points）
? Software Display Resolution: typically mV ａnd mA （but 3 decimals shown, so can be
3.456E-1 A for addition decimal）
上海市闵行区莘朱路903号（甲）厂区,201100
Tel: 021-54387376,54380568 Fax: 021-54997016 E-mail:br.sci@263.net http://www.br17.com
上海泊睿科学仪器有限公司
Current-Voltage Measurement System （IV Tester） -
20W Version for Flash Solar Simulators
Main Features:
? Designed for use with continuous or pulse solar simulators
? An output trigger TTL signal is used to synchronize its data acquisition with pulse solar
simulators
? Variable resistive load
? Max Electrical Power Reading: 20W base model, 60W high power model
? Base Model Voltage range 200V （can be modified with additional shunt to suit
application）
? Base Model Current range 1A （can be modified with additional coil to suit application）
? High Power Model Voltage range 60V （can be modified with additional shunt to suit
application）
? High Power Model Current range 3A （can be modified with additional coil to suit
application）
? Separate terminal interface for voltage ａnd current measurements
? Interfaces to PC via GPIB cable for display ａnd data storage （hence GPIB card required
in computer）
? Saves each IV curve dataset in separate ASCII text file
? I-V range selectable
? Number of sample points selectable （between 10-100 points）
? Sci-IVTest Windows based control software
Parameters Measured by IV Software
Voc, Ioc
Vsc, Isc
Vmax, Imax, Pmax
efficiency （%）
Light ａnd dark I-V characteristics
上海市闵行区莘朱路903号（甲）厂区,201100
Tel: 021-54387376,54380568 Fax: 021-54997016 E-mail:br.sci@263.net http://www.br17.com
上海泊睿科学仪器有限公司
Voc Slope （similar to Rs）
Rp or Rshunt （system measures slope near Isc for this value）
FF or Fill Factor
JSc （mA/cm2）
Forward ａnd Reverse Sweep Feature
SKU: SSIVT-20F
The SSIVT is an electrical current-voltage measurement system used to characterize
photovoltaic cell performance. This current-voltage tester works by sampling various current
versus voltage combinations of the photovoltaic cell with a variable impedance load. The
performance of the photovoltaic cell is determined by measuring this output I-V relationship
while it is being illuminated by light. This relationship is typically called an "I-V curve" ａnd can
be obtained by exposing the photovoltaic cell to a constant level of light while varying an
external impedance load such that its current-voltage values change. Since multiple I-V data
points are required to create an I-V curve, an external trigger function model is available for
use with pulse solar simulators. This allows the tester to create multiple sequential pulses
（typically 10-100 points selectable） to complete the IV curve measurements. Universal input
100-240VAC, 50/60Hz. Software ａnd GPIB Board is included. An external computer （sold
separately） such as the PC computer controller is required to control this current-voltage
measurement system.
Purpose of Current Vs Voltage Measurement Test
A solar cell may be operated over a wide range of voltage ａnd current combinations, but there
is generally an optimum combination for maximum energy collection efficiency. By varying an
external load resistance from zero to infinity, the optimum I-V combination where the solar cell
delivers the most power can be found.
Current ａnd Voltage Measurement Range
The standard I-V Test system can measure electrical power from photovoltaic cells up to 20W.
The voltage envelope is limited to 200V ａnd the current is limited to 1A. A higher powered
60W version is available where the voltage is limited to 60V ａnd the current is limited to 3A.
For higher loads, shunts to measure a portion of the current can be used. In general, the
limitation of the standard model is the 1A current limit. If your solar cell can generate more
current than 1A, then we recommend upgrading to the 60W model.
Voltage Scaling Factor
Although the maximum voltage of the base unit is 200V, the software can rescale its scanning
range to 2V, 10V, 20V or 200V. Once the scale is selected, the maximum number of I-V
measurement points that can be taken in that selected range is 100 points.
Current Density - Voltage （J-V） Measurements
The software currently only measures I-V characteristics ａnd JSc （mA/cm2）, but other J-V
上海市闵行区莘朱路903号（甲）厂区,201100
Tel: 021-54387376,54380568 Fax: 021-54997016 E-mail:br.sci@263.net http://www.br17.com
上海泊睿科学仪器有限公司
values can be derrived as J=I/area. The software outputs the I-V characteristics in an ASCII
file which can then be read to derrive current density values.
Software
Software is written in Labview, but a Labview Runtime engine allows it to run on Windows XP
without the Labview development toolkit.
System Notes
The I-V Measurement System sweeps the IV curve with an automatically adjustable resistive
load ａnd records multiple I-V data points along the way. The voltage ａnd current ranges are
software selectable ａnd so is the number of points taken, from 10-100 points depending on
the time length of the test allowable. The I-V data point values are then recorded ａnd plotted
on a computer display ａnd saved in an ASCII text file. The points are selected by voltage,
hence the voltage readings are evenly spaced.
I-V Measurement Basics
Fill Factor: Fill factor refers to the "squareness" of the I-V curve. It describes how closely
matched the voltage is at its maximum power point ａnd the current is also at its maximum
power point. The higher the fill factor match, the more square the I-V curve.
Conversion Efficiency: The conversion efficiency of a solar cell is the percentage of light
energy that gets converted to electrical power.
References:
The U.S. Department of Energy maintains a good website on how to use I-V measurement
systems in solar cell testing. Please see www.eere.energy.gov/solar/current_voltage.html
Technical Specifications
? Base unit 200V max. （scale to 2V or 10V, but 20V ａnd 200V scales possible please ask）
? Dwell time （wait time between each I-V reading） - programable, but cannot be below
3ms
? Number of I-V scanned points - 10 to 100 programable
? Hardware Voltage Resolution: 50μv @ 2V scale, 500μV @ 20V scale （accuracy per
reading）
? Hardware Current Resolution: 50μA @ 1A scale （accuracy per reading）
? I-V Measurement Sweep Resolution: （voltage scale selected / number of I-V scanned
points）
? Software Display Resolution: typically mV ａnd mA （but 3 decimals shown, so can be
3.456E-1 A for addition decimal）
上海市闵行区莘朱路903号（甲）厂区,201100
Tel: 021-54387376,54380568 Fax: 021-54997016 E-mail:br.sci@263.net http://www.br17.com
上海泊睿科学仪器有限公司
Current-Voltage Measurement System （IV Tester） -
60W Version for Continuous Solar Simulators
Main Features:
? Designed for use with continuous or pulse solar simulators
? An output trigger TTL signal is used to synchronize its data acquisition with pulse solar
simulators
? Variable resistive load
? Max Electrical Power Reading: 20W base model, 60W high power model
? Base Model Voltage range 200V （can be modified with additional shunt to suit
application）
? Base Model Current range 1A （can be modified with additional coil to suit application）
? High Power Model Voltage range 60V （can be modified with additional shunt to suit
application）
? High Power Model Current range 3A （can be modified with additional coil to suit
application）
? Separate terminal interface for voltage ａnd current measurements
? Interfaces to PC via GPIB cable for display ａnd data storage （hence GPIB card required
in computer）
? Saves each IV curve dataset in separate ASCII text file
? I-V range selectable
? Number of sample points selectable （between 10-100 points）
? Sci-IVTest Windows based control software
Parameters Measured by IV Software
Voc, Ioc
Vsc, Isc
Vmax, Imax, Pmax
efficiency （%）
Light ａnd dark I-V characteristics
上海市闵行区莘朱路903号（甲）厂区,201100
Tel: 021-54387376,54380568 Fax: 021-54997016 E-mail:br.sci@263.net http://www.br17.com
上海泊睿科学仪器有限公司
Voc Slope （similar to Rs）
Rp or Rshunt （system measures slope near Isc for this value）
FF or Fill Factor
JSc （mA/cm2）
Forward ａnd Reverse Sweep Feature
SKU: SSIVT-60C
The SSIVT is an electrical current-voltage measurement system used to characterize
photovoltaic cell performance. This current-voltage tester works by sampling various current
versus voltage combinations of the photovoltaic cell with a variable impedance load. The
performance of the photovoltaic cell is determined by measuring this output I-V relationship
while it is being illuminated by light. This relationship is typically called an "I-V curve" ａnd can
be obtained by exposing the photovoltaic cell to a constant level of light while varying an
external impedance load such that its current-voltage values change. Since multiple I-V data
points are required to create an I-V curve, an external trigger function model is available for
use with pulse solar simulators. This allows the tester to create multiple sequential pulses
（typically 10-100 points selectable） to complete the IV curve measurements. Universal input
100-240VAC, 50/60Hz. Software ａnd GPIB Board is included. An external computer （sold
separately） such as the PC computer controller is required to control this current-voltage
measurement system.
Purpose of Current Vs Voltage Measurement Test
A solar cell may be operated over a wide range of voltage ａnd current combinations, but there
is generally an optimum combination for maximum energy collection efficiency. By varying an
external load resistance from zero to infinity, the optimum I-V combination where the solar cell
delivers the most power can be found.
Current ａnd Voltage Measurement Range
The standard I-V Test system can measure electrical power from photovoltaic cells up to 20W.
The voltage envelope is limited to 200V ａnd the current is limited to 1A. A higher powered
60W version is available where the voltage is limited to 60V ａnd the current is limited to 3A.
For higher loads, shunts to measure a portion of the current can be used. In general, the
limitation of the standard model is the 1A current limit. If your solar cell can generate more
current than 1A, then we recommend upgrading to the 60W model.
Voltage Scaling Factor
Although the maximum voltage of the base unit is 200V, the software can rescale its scanning
range to 2V, 10V, 20V or 200V. Once the scale is selected, the maximum number of I-V
measurement points that can be taken in that selected range is 100 points.
Current Density - Voltage （J-V） Measurements
The software currently only measures I-V characteristics ａnd JSc （mA/cm2）, but other J-V
上海市闵行区莘朱路903号（甲）厂区,201100
Tel: 021-54387376,54380568 Fax: 021-54997016 E-mail:br.sci@263.net http://www.br17.com
上海泊睿科学仪器有限公司
values can be derrived as J=I/area. The software outputs the I-V characteristics in an ASCII
file which can then be read to derrive current density values.
Software
Software is written in Labview, but a Labview Runtime engine allows it to run on Windows XP
without the Labview development toolkit.
System Notes
The I-V Measurement System sweeps the IV curve with an automatically adjustable resistive
load ａnd records multiple I-V data points along the way. The voltage ａnd current ranges are
software selectable ａnd so is the number of points taken, from 10-100 points depending on
the time length of the test allowable. The I-V data point values are then recorded ａnd plotted
on a computer display ａnd saved in an ASCII text file. The points are selected by voltage,
hence the voltage readings are evenly spaced.
I-V Measurement Basics
Fill Factor: Fill factor refers to the "squareness" of the I-V curve. It describes how closely
matched the voltage is at its maximum power point ａnd the current is also at its maximum
power point. The higher the fill factor match, the more square the I-V curve.
Conversion Efficiency: The conversion efficiency of a solar cell is the percentage of light
energy that gets converted to electrical power.
References:
The U.S. Department of Energy maintains a good website on how to use I-V measurement
systems in solar cell testing. Please see www.eere.energy.gov/solar/current_voltage.html
Technical Specifications
? Base unit 200V max. （scale to 2V or 10V, but 20V ａnd 200V scales possible please ask）
? Dwell time （wait time between each I-V reading） - programable, but cannot be below
3ms
? Number of I-V scanned points - 10 to 100 programable
? Hardware Voltage Resolution: 50μv @ 2V scale, 500μV @ 20V scale （accuracy per
reading）
? Hardware Current Resolution: 50μA @ 1A scale （accuracy per reading）
? I-V Measurement Sweep Resolution: （voltage scale selected / number of I-V scanned
points）
? Software Display Resolution: typically mV ａnd mA （but 3 decimals shown, so can be
3.456E-1 A for addition decimal）
上海市闵行区莘朱路903号（甲）厂区,201100
Tel: 021-54387376,54380568 Fax: 021-54997016 E-mail:br.sci@263.net http://www.br17.com
上海泊睿科学仪器有限公司
Current-Voltage Measurement System （IV Tester） -
60W Version for Flash Solar Simulators
Main Features:
? Designed for use with continuous or pulse solar simulators
? An output trigger TTL signal is used to synchronize its data acquisition with pulse solar
simulators
? Variable resistive load
? Max Electrical Power Reading: 20W base model, 60W high power model
? Base Model Voltage range 200V （can be modified with additional shunt to suit
application）
? Base Model Current range 1A （can be modified with additional coil to suit application）
? High Power Model Voltage range 60V （can be modified with additional shunt to suit
application）
? High Power Model Current range 3A （can be modified with additional coil to suit
application）
? Separate terminal interface for voltage ａnd current measurements
? Interfaces to PC via GPIB cable for display ａnd data storage （hence GPIB card required
in computer）
? Saves each IV curve dataset in separate ASCII text file
? I-V range selectable
? Number of sample points selectable （between 10-100 points）
? Sci-IVTest Windows based control software
Parameters Measured by IV Software
Voc, Ioc
Vsc, Isc
Vmax, Imax, Pmax
efficiency （%）
Light ａnd dark I-V characteristics
上海市闵行区莘朱路903号（甲）厂区,201100
Tel: 021-54387376,54380568 Fax: 021-54997016 E-mail:br.sci@263.net http://www.br17.com
上海泊睿科学仪器有限公司
Voc Slope （similar to Rs）
Rp or Rshunt （system measures slope near Isc for this value）
FF or Fill Factor
JSc （mA/cm2）
Forward ａnd Reverse Sweep Feature
SKU: SSIVT-60F
The SSIVT is an electrical current-voltage measurement system used to characterize
photovoltaic cell performance. This current-voltage tester works by sampling various current
versus voltage combinations of the photovoltaic cell with a variable impedance load. The
performance of the photovoltaic cell is determined by measuring this output I-V relationship
while it is being illuminated by light. This relationship is typically called an "I-V curve" ａnd can
be obtained by exposing the photovoltaic cell to a constant level of light while varying an
external impedance load such that its current-voltage values change. Since multiple I-V data
points are required to create an I-V curve, an external trigger function model is available for
use with pulse solar simulators. This allows the tester to create multiple sequential pulses
（typically 10-100 points selectable） to complete the IV curve measurements. Universal input
100-240VAC, 50/60Hz. Software ａnd GPIB Board is included. An external computer （sold
separately） such as the PC computer controller is required to control this current-voltage
measurement system.
Purpose of Current Vs Voltage Measurement Test
A solar cell may be operated over a wide range of voltage ａnd current combinations, but there
is generally an optimum combination for maximum energy collection efficiency. By varying an
external load resistance from zero to infinity, the optimum I-V combination where the solar cell
delivers the most power can be found.
Current ａnd Voltage Measurement Range
The standard I-V Test system can measure electrical power from photovoltaic cells up to 20W.
The voltage envelope is limited to 200V ａnd the current is limited to 1A. A higher powered
60W version is available where the voltage is limited to 60V ａnd the current is limited to 3A.
For higher loads, shunts to measure a portion of the current can be used. In general, the
limitation of the standard model is the 1A current limit. If your solar cell can generate more
current than 1A, then we recommend upgrading to the 60W model.
Voltage Scaling Factor
Although the maximum voltage of the base unit is 200V, the software can rescale its scanning
range to 2V, 10V, 20V or 200V. Once the scale is selected, the maximum number of I-V
measurement points that can be taken in that selected range is 100 points.
Current Density - Voltage （J-V） Measurements
The software currently only measures I-V characteristics ａnd JSc （mA/cm2）, but other J-V
上海市闵行区莘朱路903号（甲）厂区,201100
Tel: 021-54387376,54380568 Fax: 021-54997016 E-mail:br.sci@263.net http://www.br17.com
上海泊睿科学仪器有限公司
values can be derrived as J=I/area. The software outputs the I-V characteristics in an ASCII
file which can then be read to derrive current density values.
Software
Software is written in Labview, but a Labview Runtime engine allows it to run on Windows XP
without the Labview development toolkit.
System Notes
The I-V Measurement System sweeps the IV curve with an automatically adjustable resistive
load ａnd records multiple I-V data points along the way. The voltage ａnd current ranges are
software selectable ａnd so is the number of points taken, from 10-100 points depending on
the time length of the test allowable. The I-V data point values are then recorded ａnd plotted
on a computer display ａnd saved in an ASCII text file. The points are selected by voltage,
hence the voltage readings are evenly spaced.
I-V Measurement Basics
Fill Factor: Fill factor refers to the "squareness" of the I-V curve. It describes how closely
matched the voltage is at its maximum power point ａnd the current is also at its maximum
power point. The higher the fill factor match, the more square the I-V curve.
Conversion Efficiency: The conversion efficiency of a solar cell is the percentage of light
energy that gets converted to electrical power.
References:
The U.S. Department of Energy maintains a good website on how to use I-V measurement
systems in solar cell testing. Please see www.eere.energy.gov/solar/current_voltage.html
Technical Specifications
? Base unit 200V max. （scale to 2V or 10V, but 20V ａnd 200V scales possible please ask）
? Dwell time （wait time between each I-V reading） - programable, but cannot be below
3ms
? Number of I-V scanned points - 10 to 100 programable
? Hardware Voltage Resolution: 50μv @ 2V scale, 500μV @ 20V scale （accuracy per
reading）
? Hardware Current Resolution: 50μA @ 1A scale （accuracy per reading）
? I-V Measurement Sweep Resolution: （voltage scale selected / number of I-V scanned
points）
? Software Display Resolution: typically mV ａnd mA （but 3 decimals shown, so can be
3.456E-1 A for addition decimal）
上海市闵行区莘朱路903号（甲）厂区,201100
Tel: 021-54387376,54380568 Fax: 021-54997016 E-mail:br.sci@263.net http://www.br17.com
上海泊睿科学仪器有限公司
Current-Voltage Measurement System （IV Tester） -
1000W Version for Flash Solar Simulators
Main Features:
? Designed for use with continuous or pulse solar simulators
? An output trigger TTL signal is used to synchronize its data acquisition with pulse solar
simulators
? Variable resistive load
? Max Electrical Power Reading: 20W base model, 60W high power model
? Base Model Voltage range 200V （can be modified with additional shunt to suit
application）
? Base Model Current range 1A （can be modified with additional coil to suit application）
? High Power Model Voltage range 60V （can be modified with additional shunt to suit
application）
? High Power Model Current range 3A （can be modified with additional coil to suit
application）
? Separate terminal interface for voltage ａnd current measurements
? Interfaces to PC via GPIB cable for display ａnd data storage （hence GPIB card required
in computer）
? Saves each IV curve dataset in separate ASCII text file
? I-V range selectable
? Number of sample points selectable （between 10-100 points）
? Sci-IVTest Windows based control software
Parameters Measured by IV Software
Voc, Ioc
Vsc, Isc
Vmax, Imax, Pmax
efficiency （%）
Light ａnd dark I-V characteristics
上海市闵行区莘朱路903号（甲）厂区,201100
Tel: 021-54387376,54380568 Fax: 021-54997016 E-mail:br.sci@263.net http://www.br17.com
上海泊睿科学仪器有限公司
Voc Slope （similar to Rs）
Rp or Rshunt （system measures slope near Isc for this value）
FF or Fill Factor
JSc （mA/cm2）
Forward ａnd Reverse Sweep Feature
SKU: SSIVT-1KF
The SSIVT is an electrical current-voltage measurement system used to characterize
photovoltaic cell performance. This current-voltage tester works by sampling various current
versus voltage combinations of the photovoltaic cell with a variable impedance load. The
performance of the photovoltaic cell is determined by measuring this output I-V relationship
while it is being illuminated by light. This relationship is typically called an "I-V curve" ａnd can
be obtained by exposing the photovoltaic cell to a constant level of light while varying an
external impedance load such that its current-voltage values change. Since multiple I-V data
points are required to create an I-V curve, an external trigger function model is available for
use with pulse solar simulators. This allows the tester to create multiple sequential pulses
（typically 10-100 points selectable） to complete the IV curve measurements. Universal input
100-240VAC, 50/60Hz. Software ａnd GPIB Board is included. An external computer （sold
separately） such as the PC computer controller is required to control this current-voltage
measurement system.
Purpose of Current Vs Voltage Measurement Test
A solar cell may be operated over a wide range of voltage ａnd current combinations, but there
is generally an optimum combination for maximum energy collection efficiency. By varying an
external load resistance from zero to infinity, the optimum I-V combination where the solar cell
delivers the most power can be found.
Current ａnd Voltage Measurement Range
The standard I-V Test system can measure electrical power from photovoltaic cells up to 20W.
The voltage envelope is limited to 200V ａnd the current is limited to 1A. A higher powered
60W version is available where the voltage is limited to 60V ａnd the current is limited to 3A.
For higher loads, shunts to measure a portion of the current can be used. In general, the
limitation of the standard model is the 1A current limit. If your solar cell can generate more
current than 1A, then we recommend upgrading to the 60W model.
Voltage Scaling Factor
Although the maximum voltage of the base unit is 200V, the software can rescale its scanning
range to 2V, 10V, 20V or 200V. Once the scale is selected, the maximum number of I-V
measurement points that can be taken in that selected range is 100 points.
Current Density - Voltage （J-V） Measurements
The software currently only measures I-V characteristics ａnd JSc （mA/cm2）, but other J-V
上海市闵行区莘朱路903号（甲）厂区,201100
Tel: 021-54387376,54380568 Fax: 021-54997016 E-mail:br.sci@263.net http://www.br17.com
上海泊睿科学仪器有限公司
上海市闵行区莘朱路903号（甲）厂区,201100
Tel: 021-54387376,54380568 Fax: 021-54997016 E-mail:br.sci@263.net http://www.br17.com
values can be derrived as J=I/area. The software outputs the I-V characteristics in an ASCII
file which can then be read to derrive current density values.
Software
Software is written in Labview, but a Labview Runtime engine allows it to run on Windows XP
without the Labview development toolkit.
System Notes
The I-V Measurement System sweeps the IV curve with an automatically adjustable resistive
load ａnd records multiple I-V data points along the way. The voltage ａnd current ranges are
software selectable ａnd so is the number of points taken, from 10-100 points depending on
the time length of the test allowable. The I-V data point values are then recorded ａnd plotted
on a computer display ａnd saved in an ASCII text file. The points are selected by voltage,
hence the voltage readings are evenly spaced.
I-V Measurement Basics
Fill Factor: Fill factor refers to the "squareness" of the I-V curve. It describes how closely
matched the voltage is at its maximum power point ａnd the current is also at its maximum
power point. The higher the fill factor match, the more square the I-V curve.
Conversion Efficiency: The conversion efficiency of a solar cell is the percentage of light
energy that gets converted to electrical power.
References:
The U.S. Department of Energy maintains a good website on how to use I-V measurement
systems in solar cell testing. Please see www.eere.energy.gov/solar/current_voltage.html
Technical Specifications
? Base unit 200V max. （scale to 2V or 10V, but 20V ａnd 200V scales possible please ask）
? Dwell time （wait time between each I-V reading） - programable, but cannot be below
3ms
? Number of I-V scanned points - 10 to 100 programable
? Hardware Voltage Resolution: 50μv @ 2V scale, 500μV @ 20V scale （accuracy per
reading）
? Hardware Current Resolution: 50μA @ 1A scale （accuracy per reading）
? I-V Measurement Sweep Resolution: （voltage scale selected / number of I-V scanned
points）
? Software Display Resolution: typically mV ａnd mA （but 3 decimals shown, so can be
3.456E-1 A for addition decimal）
上海泊睿科学仪器有限公司