hantek-pps2116A

Controlling a Hantek PPS 2116A Power Supply using Python 3.

Introduction

In www.enertronicsar.com, we have a Hantek PPS 2116A Power Supply. Some characteristics of this power supply are:

. Low ripple . High resolution: 10mV, 1mA . Features selectable auto-serial or parallel function . Convenient software calibration for use with PC . High-stability . Low drift . Built in over voltage and over current protection . Cooling by internal thermostatically controlled fan . Voltage Output: 0-32VDC . Current Output: 0-5 amps . Source Effect: CV≤0.01%+3mV(mA) . Load Effect: . CV≤0.01%+3mV(I≤3A) . CC≤0.2%+3mA(I≤3A) . CV≤0.02%+5mV(I>3A) . CC≤0.2%+5mA(I>3A) . Ripple and Noise: . CV≤l.0mVrms(I≤3A) . CC≤3mArms(I≤3A) . CV≤2.0mVrms(I>3A) . CC≤6mArms(I>3A) . Read accuracy: . Read accuracy voltage: <±(read values 0.5% + 2bit) . Read accuracy current: <±(read values 1% + 2bit) . Temperature: 0-- + 40 deg C . Humidity: ≤80% . Power: 110VAC, 60Hz . Dimensions: 350mm x 150mm x 210mm . Weight: 5.44kg, 12 lbs

We're using it in a testbench of some power electronics componentes that are likely to explode (yes, you read it right), so we decided to use all the instruments involved in this testbench remotely.

Requirements

1. Python 3.
2. PySerial. python3 -m pip install pyserial
3. A Hantek PPS 2116A Power Supply.
4. A USB port available.
5. Linux OS. (We use it in Debian Stretc so far).

How to use it...

Explore the Hantek_PPS2116A class in power.py. There you can find some usefull methods to turn on and off, set current and voltage, and some other interesting tools.

The test.py program is under development.

Some issues about usb devices

USB to UART devices ( /dev/ttyUSB0 in our system) are loaded with "rw-rw----" permissions by default. In order to use it properly with this script, you should change this devices permissions to "rwxrwxrwx". You can do that using: # chmod 777 /dev/ttyUSB0 (Use your device number if different from 0).

The steps descrived previously has the disadvantage that the permissions are forgoten when the device is unplugged. We found a different aproach in this website to make a change permanent.