Topward 6302A Dual-Tracking Analog DC Power Supply.  Unit powers up but has a noisy fan and is missing rear foot - no further testing has been done. 

Features: 

• Twin power output with tracking function for automatic selection of parallel or serial connection
• Short-circuit protection against external input while poviding constant voltage and constant current
• Allows seral or parallel connection with the same power supply model 
• 5V/5A constant-voltage output

 Specifications:

Output Voltage:            0-30V x 2

Output Current:            0-2A x 2

CONSTANT VOLTAGE CHARACTERISTICS

Load Regulation           ±0.01% + 2mV

Line Regulation            ±0.01% + 2mV

Ripple & Noise (=200W)       =0.5mVrms

Ripple & Noise (=200W)       =1mVrms

CONSTANT CURRENT CHARACTERISTICS

Load Regulation (=200W)     =10mA

Load Regulation (=200W)     =15mA

Line Regulation            ±0.01% +2mA

Ripple & Noise    (=200W)    =1mArms

Ripple & Noise    (=200W)    =3mArms

DISPLAY ACCURACY

Analog Display (A)       Full-scale 3%

Digital Display (D)                =0.1% + 2d

PROGRAMMING SPEED

Rise Time (no load)      =100mS

            (load)                       =200mS(<6A), =500mS(<10A), =1S(=10A)

Fall Time (no load)       =2.5S

             (load)                      = 250mS

OUTPUT IMPEDANCE         =2mO + 2µH

RECOVERY TIME                 =100 µS to with 0.1% of set voltage(50%-100% load change)

FUNCTIONS

Series Connection       Different models can be connected in series (=240V)

Parallel Connection     Same models can be connected in parallet (=24A)

Master - Slave              N/A

 REMOTE CONTROL

Voltage Programmable

 by external DC Voltage        N/A

 by external Resistance        N/A

Current Programmable

 by external DC Voltage        N/A

 by external Resistance         N/A

 TRACKING OPERATION

Tracking Error                ±0.2% + 10mV

Series Regulation                 ±0.3% + 10mV

 5V FIXED OPERATION

Load Regulation           =10mV

Line Regulation            =5mV

Ripple & Noise             =2mVrms

Voltage Accuracy                 5V±0.25V

Output Current             5A

SN: 002664