UPD3305S

Python class for controlling Uni-T UDP3305S or UDP3305S-E lab power supply units.

Example script

#!/bin/env python3
import time, datetime
from UDP3305S import UDP3305S

psu = UDP3305S("TCPIP::192.168.0.66::INSTR")

# setup voltage and current limits
psu.ch1.set_voltage(13.5)
psu.ch1.set_current(3)
psu.ch2.set_voltage(24)
psu.ch2.set_current(4.5)

# activate the first two channels
psu.ch1.on()
psu.ch2.on()

# log current and power for about 30 seconds
print("timestamp, A1, P1, A2, P2")
for i in range(30):
    print(", ".join([str(x) for x in [
            datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S"),
            psu.ch1.read_current(),
            psu.ch1.read_power(),
            psu.ch1.read_current(),
            psu.ch1.read_power(),
    ]]))
    time.sleep(1)

# turn off all channels
psu.off()

Reference

You can get this from pydoc anytime.

class UDP3305S(builtins.object)
 |  UDP3305S(RID)
 |  
 |  Uni-T UDP3305S Lab power supply
 |  
 |  Features 5 channels:
 |  
 |      ch1     channel1
 |      ch2     channel2
 |      ch3     channel3
 |      chSER   virtual channel vor serial mode
 |      chPAR   virtual channel for parallel mode
 |  
 |  Methods defined here:
 |  
 |  __del__(self)
 |  
 |  __init__(self, RID)
 |      Initialize PSU instance
 |      
 |      RID (Resource ID) as defined by pyVISA. E.g.:
 |      
 |          TCPIP::192.168.0.66::INSTR
 |          TCPIP::PowerSupply::INSTR
 |          GPIB1::10
 |          USB::0x1234::125::A22-5::INSTR
 |      
 |          See pyVISA documentation for details.
 |  
 |  __str__(self)
 |      Return str(self).
 |  
 |  get_mode(self)
 |      return output mode (NORMAL | SER | PARA)
 |  
 |  lock(self)
 |      lock keys on instrument panel
 |  
 |  off(self)
 |      turn off all outputs
 |  
 |  on(self)
 |      turn on all outputs
 |  
 |  set_mode(self, mode)
 |      set output mode (NORMAL | SER | PARA)
 |  
 |  unlock(self)
 |      unlock keys on instrument panel
 |  
 |  ----------------------------------------------------------------------
 |  Data descriptors defined here:
 |  
 |  __dict__
 |      dictionary for instance variables (if defined)
 |  
 |  __weakref__
 |      list of weak references to the object (if defined)

class channel(builtins.object)
 |  channel(name, connection, V_max, A_max)
 |  
 |  PSU channel
 |  Implementaton of all channel features.
 |  
 |  Methods defined here:
 |  
 |  __init__(self, name, connection, V_max, A_max)
 |      Initialize channel object
 |      
 |      name        name of the channel
 |      connection  connection object to read/write from/to
 |      V_max       max voltage supported
 |      A_max       max current supported
 |  
 |  get_OCP(self)
 |      return over current protection (OCP) value [A]
 |  
 |  get_OVP(self)
 |      return over voltage protection (OVP) value [V]
 |  
 |  get_current(self)
 |      get current limit [A]
 |  
 |  get_voltage(self)
 |      get output voltage [V]
 |  
 |  off(self)
 |      turn output off
 |  
 |  on(self)
 |      turn output on
 |  
 |  read_all(self)
 |      read (measure) output values: Volts [V], current [A], Power[W]
 |  
 |  read_current(self)
 |      read (measure) output current [A]
 |  
 |  read_power(self)
 |      read (measure) output power [W]
 |  
 |  read_voltage(self)
 |      read (measure) output voltage [V]
 |  
 |  set_OCP(self, value, state=1)
 |      set over current protection (OCP) value [A]
 |  
 |  set_OVP(self, value, state=1)
 |      set over voltage protection (OVP) value [V]
 |  
 |  set_current(self, value)
 |      set current limit [A]
 |  
 |  set_voltage(self, value)
 |      set output voltage [V]