Model | 3720A | 3721A |
Input Ratings |
Current Voltage Power*1 | 0~30A 0~80V 250W at 40oC | 0~40A 0~80V 400W at 40oC |
Input Characteristics |
Input Characteristics | 
| 
|
Minimum Operation Voltage @Full Scale Current | 0.6V | 0.6V |
Constant Current Mode |
LowRange Resolution Accuracy | 0~3A 0.1mA 0.1β
+5mA | 0~4A 0.1mA 0.1β
+5mA |
HighRange Resolution Accuracy | 0~40A 1mA 0.1β
+10mA | 0~40A 1mA 0.1β
+10mA |
|
|
Constant Voltage Mode |
Range Resolution Accuracy | 0~80V 1mV 0.1β
+10mV | 0~80V 1mV 0.1β
+10mV |
Constant Resistance Mode |
LowRange Resolution Accuracy @I>4A | 0.02~2Ξ© 0.1mΞ© 0.5β
+12mΞ© | 0.02~2Ξ© 0.1mΞ© 0.5β
+12mΞ© |
MiddleRange Resolution Accuracy @V>8V | 2~200Ξ© 8.6uS*2 0.3β
+1.25mS | 2~200Ξ© 8.6uS 0.3β
+1.25mS |
|
|
HighRange Resolution Accuracy @V>8V | 20~2000Ξ© 0.96uS 0.3β
+0.625mS | 20~2000Ξ© 0.96uS 0.3β
+0.625mS |
|
Constant Power Mode |
Range Resolution @P<100W @Pβ₯100W Accuracy | 0~250W 1mW 10mW 0.2β
+600mW | 0~400W 1mW 10mW 0.2β
+600mW |
Current Measurement |
LowRange Resolution Accuracy | 0~4A 0.1mA 0.05β
+4mA | 0~4A 0.1mA 0.05β
+4mA |
|
|
HighRange Resolution Accuracy | 0~40A 1mA 0.05β
+8mA | 0~40A 1mA 0.05β
+8mA |
|
|
Voltage Measurement |
Range Resolution Accuracy | 0~80V 1mV 0.1β
+8mV | 0~80V 1mV 0.1β
+8mV |
Power Measurement |
Range Resolution @P<100W @Pβ₯100W Accuracy | 0~250W 1mW 10mW 0.1β
+600mW | 0~400W 1mW 10mW 0.1β
+600mW |
Current Slew Rates |
RangeCCH CCL*3 | 1mA/us~4A/us 100uA/us~400mA/us | 1mA/us~4A/us 100uA/us~400mA/us |
Resolution | 1mA/us | 1mA/us |
Accuracy*4 | 3% + 10us | 3% + 10us |
Transient Operation |
Transient Mode | Continuous, Pulse, Toggled | Continuous, Pulse, Toggled |
FrequencyRange *5 | 0.38Hz~50kHz | 0.38Hz~50kHz |
High/Low Time Resolution Accuracy | 0~655.35ms 10us 0.2β
+10us | 0~655.35ms 10us 0.2β
+10us |
Rising/Falling Time Resolution Accuracy | 10us~655.35ms 10us 0.2β
+10us | 10us~655.35ms 10us 0.2β
+10us |
List Characteristics |
Step Time Resolution Accuracy | 10us~100000s 10us 0.2β
+10us | 10us~100000s 10us 0.2β
+10us |
Number of Steps | 1~50 | 1~50 |
Cycle | 1~65535 | 1~65535 |
StoreCapacity | 7 lists | 7 lists |
Expanded Functions | Chain | Chain |
Battery Discharge |
Discharge Time Resolution Accuracy | 1s~100h 1s 0.2β
+1s | 1s~100h 1s 0.2β
+1s |
BatteryCapacity Resolution Accuracy | 1mAh~4000Ah 1mAh 0.3β
+0.01Ah | 1mAh~4000Ah 1mAh 0.3β
+0.01Ah |
Short Circuit |
CCL Mode CCH Mode CV Mode CRL Mode CRM Mode CRH Mode CPV Mode CPC Mode | 4.4A 44A 0V 0.018Ξ© 1.8Ξ© 18Ξ© 270W 0W | 4.4A 44A 0V 0.018Ξ© 1.8Ξ© 18Ξ© 420W 0W |
Maximum Slew Rate | Β |
Current Voltage | 4A/us 0.6V/us | 4A/us 0.6V/us |
Programmable Open Circuit | β₯20kΞ© | β₯20kΞ© |
Trigger Input |
Trigger Level Trigger Pulse Width | TTL falling edge β₯10us | TTL falling edge β₯10us |
Maximum Input Levels |
Current Voltage | 44A 84V | 44A 84V |
Protection Features | OV, OC,OP,OT, RV | OV, OC,OP,OT, RV |
Reverse Current Capacity |
Input OFF InputON | 30A 50A | 30A 50A |
Ripple and Noise |
Current(rms/p-p) Voltage(rms) | 3mA/30mA 5mV | 3mA/30mA 5mV |
Environmental Conditions |
Temperature Relative Humidity | 0~50oC β€85β
| 0~50oC β€85β
|
Remote Interface*6 | RS232, GPIB, USB | RS232, GPIB, USB |
Programming Language | SCPI | SCPI |
AC Input |
Voltage Frequency | AC110V or AC220VΒ±15β
48 to 63Hz | AC110V or AC220VΒ±15β
48 to 63Hz |
Net Weight | 5.8kg | 5.8kg |
