3720A and 3721A Electronic Loads provide an adaptable, and functional asset wherever power sources need to be tested.These units are designed to provide high reliability, great performance, and ease of operation with multiple functionality.
- 4 basic functions: CC, CV, CR, and CP ; and 8 basic test modes: CCL, CCH, CV, CRL, CRM, CRH, CPV, CPC
- High-speedsequence, high-speed transient, short-circuit, battery discharge and other auxiliary functions
- Minimum operating voltage is less than 0.6V at the load's full rated current
- Optional zero-voltage test accessories are available
- Programmable current slew rate
- Perfect protection assures high reliability in the most complicated of test environments
- Multiple groups of parameters and lists can be saved and recalled
- Ruggedized structure, exquisite user-friendly design and convenient operation
- Supports SCPI (Standard Commands for Programmable Instrumentation) and Labview, and provides necessary PC software
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Model
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3720A
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3721A
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Input Ratings
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Current
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0~30A
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0~40A
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Voltage
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0~80V
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0~80V
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Power*1
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250W at 40℃
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400W at 40℃
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Input Characteristics
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Input Characteriistiics
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Min. Operation Voltage
@Full Scale Current
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0.6V
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0.6V
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Constant Current Mode
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Low Range
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0~3A
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0~4A
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Resolution
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0.1mA
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0.1mA
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Accuracy
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0.1% + 5mA
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0.1% + 5mA
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High Range
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0~40A
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0~40A
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Resolution
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1mA
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1mA
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Accuracy
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0.1% + 10mA
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0.1% + 10mA
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Constant Voltage Mode
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Range
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0~80V
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0~80V
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Resolution
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1mV
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1mV
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Accuracy
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0.1% + 10mV
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0.1% + 10mV
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Constant Resistance Mode
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Low Range
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0.02~2Ω
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0.02~2Ω
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Resolution
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0.1mΩ
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0.1mΩ
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Accuracy @I>4A
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0.5% + 12mΩ
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0.5% + 12mΩ
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Middle Range
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2~200Ω
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2~200Ω
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Resolution
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8.6uS*2
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8.6uS
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Accuracy @V>8V
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0.3% + 1.25mS
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0.3% + 1.25mS
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High Range
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20~2000Ω
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20~2000Ω
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Resolution
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0.96uS
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0.96uS
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Accuracy @V>8V
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0.3% + 0.625mS
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0.3% + 0.625mS
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Constant Power Mode
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Range
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0~250W
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0~400W
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Resolution @P<100W
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1mW
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1mW
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@P≥100W
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10mW
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10mW
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Accuracy
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0.2% + 600mW
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0.2% + 600mW
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Current Measurement
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Low Range
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0~4A
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0~4A
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Resolution
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0.1mA
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0.1mA
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Accuracy
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0.05% + 4mA
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0.05% + 4mA
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High Range
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0~40A
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0~40A
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Resolution
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1mA
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1mA
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Accuracy
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0.05% + 8mA
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0.05% + 8mA
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Voltage Measurement
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Range
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0~80V
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0~80V
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Resolution
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1mV
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1mV
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Accuracy
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0.1% + 8mV
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0.1% + 8mV
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Power Measurement
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Range
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0~250W
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0~400W
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Resolution @P<1000W
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1mV
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1mV
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@P≥1000W
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10mV
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10mV
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Accuracy
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0.1% + 600mV
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0.1% + 600mV
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Current Slew Rates
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RangeCCH
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1mA/us~4A/us
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1mA/us~4A/us
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CCL*3
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100uA/us~400mA/us
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100uA/us~400mA/us
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Resolution
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1mA/us
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1mA/us
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Accuracy*4
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3% + 10us
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3% + 10us
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Transient Operation
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Transient Mode
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Continuous, Pulse, Toggled
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Continuous, Pulse, Toggled
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Frequency Range*5
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0.38Hz~50kHz
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0.38Hz~50kHz
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High/Low Time
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0~655.35ms
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0~655.35ms
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Resolution
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10us
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10us
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Accuracy
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0.2% + 10us
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0.2% + 10us
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Riising/Falling Time
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10us~655.35
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10us~655.35
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Resolution
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10us
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10us
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Accuracy
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0.2@ + 10us
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0.2@ + 10us
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List Characteristics
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Step Time
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10us~100000s
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10us~100000s
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Resolution
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10us
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10us
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Accuracy
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0.2% + 10us
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0.2% + 10us
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Number of Steps
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1~50
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1~50
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Cycle
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1~65535
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1~65535
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Store Cpacity
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7 lists
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7 lists
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Expanded Functions
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Chain
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Chain
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Battery Discharge
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Discharge Time
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1s~100h
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1s~100h
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Resolution
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1s
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1s
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Accuracy
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0.2% + 1s
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0.2% + 1s
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Battery Capacity
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1mAh~3000Ah
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1mAh~3000Ah
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Resolution
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1mAh
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1mAh
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Accuracy
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0.3% + 0.01Ah
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0.3% + 0.01Ah
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Short Circuit
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CCL Mode
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3.3A
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4.4A
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CCH Mode
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33A
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44A
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CV Mode
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0V
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0V
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CRL Mode
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0.018Ω
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0.018Ω
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CRM Mode
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1.8Ω
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1.8Ω
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CRH Mode
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18Ω
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18Ω
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CPV Mode
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270W
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420W
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CPC Mode
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0W
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0W
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Maximum Slew Rate
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Current
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3A/us
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4A/us
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Voltage
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0.6V/us
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0.6V/us
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Programmable open Circuit
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≥20kΩ
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≥20kΩ
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Trigger Input
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Trigger Level
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TTL falling edge
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TTL falling edge
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Tirgger Pulse Width
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≥10us
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≥10us
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Maximum Input Levels
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Current
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33A
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44A
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Voltage
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84V
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84V
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Protection Features
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OV, OC, OP, OT, RV
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OV, OC, OP, OT, RV
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Reverse Current Capacity
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Input OFF
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25A
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30A
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Input ON
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40A
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50A
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Ripple and Noise
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Current(rms/p-p)
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3mA/30mA
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3mA/30mA
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Voltage(rms)
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5mV
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5mV
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Environmental Conditions
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Temperature
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0~50℃
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0~50℃
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Relative Humidity
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≤85%
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≤85%
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Remote Interface*6
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RS232, GPIB, USB(예정)
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RS232, GPIB, USB(예정)
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Programming Language
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SCPI
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SCPI
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AC Input
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Voltage
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AC110V or AC220V±15%
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AC110V or AC220V±15%
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Frequency
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48 to 63Hz
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48 to 63Hz
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*1 Maximum continuous power available is derated linearly from 100% of maximum at 40ºC, to 75% of maximum at 50 ºC.
*2 Conductance (S) = 1 / Resistance (Ω). The siemens is the SI derived unit of conductance, and the symbol is "S".
*3 The set level is 10 times larger than the slew rate in CCL mode.
*4 The actual transition time is defined as the time required for the input to change from 10% to 90% or from 90% to 10% of the programmed excursion.
*5 Transient frequency depends on the time for high/low level and rising/falling edge.
*6. Full remote control via RS232 with optional GPIB and USB(예정).
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