Metadata-Version: 2.1
Name: dcps
Version: 0.5.3
Summary: Control of DC Power Supplies through python
Home-page: https://github.com/sgoadhouse/dcps
Author: Stephen Goadhouse
Author-email: sgoadhouse@virginia.edu
Maintainer: Stephen Goadhouse
Maintainer-email: sgoadhouse@virginia.edu
License: MIT
Keywords: Rigol,DP800,DP832A,AimTTI,BK,9115,PyVISA,VISA,SCPI,INSTRUMENT
Platform: UNKNOWN
Classifier: Development Status :: 4 - Beta
Classifier: Intended Audience :: Developers
Classifier: Intended Audience :: Education
Classifier: Intended Audience :: Science/Research
Classifier: License :: OSI Approved :: MIT License
Classifier: Programming Language :: Python
Classifier: Topic :: Scientific/Engineering
Classifier: Topic :: Scientific/Engineering :: Physics
Classifier: Topic :: Software Development
Classifier: Topic :: Software Development :: Libraries
Classifier: Topic :: Software Development :: Libraries :: Python Modules
Description-Content-Type: text/markdown
Requires-Dist: pyvisa
Requires-Dist: pyvisa-py

# dcps
Control of DC Power Supplies through python

This is intended to be a generic package to control various DC power
supplies using various access methods with a common API. For now, this
supports only the Rigol DP832A DC Power Supply, the Aim TTi PL-P
Series of power supplies and the BK Precision 9115 DC power supply
through pyVISA and the SCPI command set. For the RigolDP800 class,
this should work with all Rigol DP8xx power supplies although it is
only tested with the DP832A. Likewise, for the BK Precision supplies,
several model numbers are similar to the 9115 and the command set is
likely compatible.

As new power supplies are added, they should each have their own sub-package.


# Installation
You need to install the pyvisa and pyvisa-py packages. 

To install the dcps package, run the command:

```
python setup.py install
```

Alternatively, can add a path to this package to the environment
variable PYTHONPATH or even add the path to it at the start of your
python script. Use your favorite web search engine to find out more
details.

Even better, dcps is now on PyPi, so you can simply use the following
and the required depedancies should get installed for you:

```
pip install dcps
```

## Requirements
* [python](http://www.python.org/) [Works with 2.7+ and 3+]
* [pyvisa 1.9](https://pyvisa.readthedocs.io/en/stable/)
* [pyvisa-py 0.2](https://pyvisa-py.readthedocs.io/en/latest/)

With the use of pyvisa-py, should not have to install the National
Instruments NIVA driver.

If using the USB communications method, must also install:
* [PyUSB 1.0.2](https://github.com/pyusb/pyusb)
* [libusb](http://www.libusb.info/)

# WARNING!
Be *really* careful since you are controlling a power supply that may be
connected to something that does not like to go to 33V when you
meant 3.3V and it may express its displeasure by exploding all over
the place. So be sure to do ALL testing without a device connected,
as much as possible, and make use of the protections built into the
power supply. For example, you can set voltage and current limits that
the power supply will obey and ignore requests by these commands to go
outside the allowable ranges. There are even SCPI commands to set
these limits, but they are not in this class because I think it is
safer that they be set manually. Of course, you can easily add those
commands and do it programatically if you like living dangerously.

## Usage
The code is a very basic class for controlling and accessing the
supported power supplies. Before running any example, be extra sure
that the power supply is disconnected from any device in case voltsges
unexpectedly go to unexpected values.

If running the examples embedded in the individual package source
files, be sure to edit the resource string or VISA descriptor of your
particular device. For RigolDP800.py, you can also set an environment
variable, DP800\_IP to the desired resource string before running the
code. For AimTTiPLP.py, there is a similar environment variable,
TTIPLP\_IP.

```python
# Lookup environment variable DP800_IP and use it as the resource
# name or use the TCPIP0 string if the environment variable does
# not exist
from dcps import RigolDP800
from os import environ
resource = environ.get('DP800_IP', 'TCPIP0::172.16.2.13::INSTR')

# create your visa instrument
rigol = RigolDP800(resource)
rigol.open()

# set to channel 1
rigol.channel = 1

# Query the voltage/current limits of the power supply
print('Ch. {} Settings: {:6.4f} V  {:6.4f} A'.
         format(rigol.channel, rigol.queryVoltage(),
                    rigol.queryCurrent()))

# Enable output of channel
rigol.outputOn()

# Measure actual voltage and current
print('{:6.4f} V'.format(rigol.measureVoltage()))
print('{:6.4f} A'.format(rigol.measureCurrent()))

# change voltage output to 2.7V
rigol.setVoltage(2.7)

# turn off the channel
rigol.outputOff()

# return to LOCAL mode
rigol.setLocal()

rigol.close()
```

## Taking it Further
This implements a small subset of available commands.

For information on what is possible for the Rigol DP8xx, see the
[Rigol DP800 Programming Guide](http://beyondmeasure.rigoltech.com/acton/attachment/1579/f-03a1/1/-/-/-/-/DP800%20Programming%20Guide.pdf)

For information on what is possible for the Aim TTi PL-P power
supplies, see the [New PL & PL-P Series Instruction Manual](http://resources.aimtti.com/manuals/New_PL+PL-P_Series_Instruction_Manual-Iss18.pdf)

For information on what is possible for the BK Precision 9115 power
supplies, see the [Model: 9115 Multi-Range DC Power Supply PROGRAMMING MANUAL](https://bkpmedia.s3.amazonaws.com/downloads/programming_manuals/en-us/9115_series_programming_manual.pdf)

For what is possible with general power supplies that adhere to the
IEEE 488 SCPI specification, like the Rigol DP8xx, see the
[SCPI 1999 Specification](http://www.ivifoundation.org/docs/scpi-99.pdf)
and the
[SCPI Wikipedia](https://en.wikipedia.org/wiki/Standard_Commands_for_Programmable_Instruments) entry.

## Contact
Please send bug reports or feedback to Stephen Goadhouse



