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alicat-0.4.0
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مشاهده بیشتر
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مشاهده بیشتر
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مشاهده بیشترتوضیحات
Python driver for Alicat mass flow controllers.
| ویژگی | مقدار |
|---|---|
| سیستم عامل | - |
| نام فایل | alicat-0.4.0 |
| نام | alicat |
| نسخه کتابخانه | 0.4.0 |
| نگهدارنده | [] |
| ایمیل نگهدارنده | [] |
| نویسنده | Patrick Fuller |
| ایمیل نویسنده | pat@numat-tech.com |
| آدرس صفحه اصلی | http://github.com/numat/alicat/ |
| آدرس اینترنتی | https://pypi.org/project/alicat/ |
| مجوز | GPLv2 |
alicat
======
Serial driver and command line tool for
[Alicat mass flow controllers](http://www.alicat.com/products/mass-flow-meters-and-controllers/mass-flow-controllers/).
<p align="center">
<img src="http://www.alicat.com/wpinstall/wp-content/uploads/2012/01/gas-mass-flow-controller1.jpg" height="400" />
</p>
*If you are using Analyt-MTC flow controllers, go to [this repository](https://github.com/schlenzmeister/AnalytMTC/wiki) for more info.*
Example Connections
===================
| Type | Usage |
| --- | --- |
| The standard [DB9 cable](http://www.alicat.com/wpinstall/wp-content/uploads/2013/07/MD8DB9.jpg) connected directly to a computer (unix: `/dev/ttyS0`, windows: `COM1`). | Good with older computers that still have the connector. |
| The cable connected to a computer through a [USB converter](https://www.amazon.com/gp/product/B0007T27H8) (unix: `/dev/ttyUSB0`, windows: `COM1`). | Good for newer computers and maker boards such as Raspberry Pis. |
| Multiple cables connected to one port via a [splitter](https://www.amazon.com/gp/product/B007F2E188) and Alicat's addressing (`A`-`Z`). | Good when number of ports is limited. |
Installation
============
```
pip install alicat
```
Usage
=====
## Command Line
For basic tasks, this driver includes a command-line interface. Read the help
for more.
```
alicat --help
```
## Python
For more complex projects, use python to automate your workflow.
```python
from alicat import FlowController
flow_controller = FlowController(port='/dev/ttyUSB0')
print(flow_controller.get())
```
If the flow controller is communicating on the specified port, this should
return a dictionary of the form:
```python
{
'setpoint': 0.0, # Setpoint, either mass flow rate or pressure
'control_point': 'flow', # Either 'flow' or 'pressure'
'gas': 'Air', # Can be any option in `flow_controller.gases`
'mass_flow': 0.0, # Mass flow (in units specified at time of purchase)
'pressure': 25.46, # Pressure (normally in psia)
'temperature': 23.62, # Temperature (normally in C)
'total_flow': 0.0, # Optional. If totalizer function purchased, will be included
'volumetric_flow': 0.0 # Volumetric flow (in units specified at time of purchase)
}
```
On flow controllers, you can set the flow or pressure setpoints.
```python
flow_controller.set_flow_rate(1.0)
flow_controller.set_pressure(20)
```
### Gas Type
You can set the gas type by name or by index. For more on setting by index, see the gas table in your Alicat's manual.
```python
flow_controller.set_gas('N2')
flow_controller.set_gas(8)
```
For firmware 5v and greater, you can create and set gas mixes. Mixes can contain up to five gases and are stored in gas indices 236-255.
```python
flow_controller.create_mix(mix_no=236, name="Mix1", gases={'N2': 50, 'O2': 30, 'CO2': 20})
flow_controller.set_gas(236)
flow_controller.delete_mix(236)
```
### PID Parameters
For flow controllers, read and write PID loop settings for device tuning.
```python
flow_controller.set_pid(p=4000, i=4000, d=10, loop_type='PD2I')
print(flow_controller.get_PID())
{
'loop_type': 'PD2I',
'P': '4000',
'I': '4000',
'D': '10',
}
```
### Other Features
Additional features include override commands to increase device functionality.
```python
flow_controller.lock() # Lock the front display.
flow_controller.unlock() # Unlock the front display.
flow_controller.hold() # Hold the valve in its current position.
flow_controller.cancel_hold() # Cancel the valve hold.
flow_controller.tare_volumetric() # Tare volumetric hold.
flow_controller.tare_pressure() # Tare pressure.
flow_controller.reset_totalizer() # Reset totalizer, if totalizer functionality included.
```
### Addressing
You can have multiple controllers on the same port by using Alicat's `A`-`Z` addresses
and an [RS-232 splitter](https://www.amazon.com/gp/product/B007F2E188).
```python
flow_controller_1 = FlowController(address='A')
flow_controller_2 = FlowController(address='B')
flow_controller_1.set_flow_rate(1.0)
flow_controller_2.set_flow_rate(0.5)
flow_controller_1.close() # /dev/ttyUSB0 is still open!
flow_controller_2.close()
```
TCP Support
===
The last version with working TCP support is [here](https://github.com/numat/alicat/tree/8af92647cb396401c0d604d83fb95a49d9a82be9) and can be installed with:
```
pip install alicat==0.3.1
```
If you use the TCP driver, please let us know and we'll add it back to the current version.
نیازمندی
| مقدار | نام |
|---|---|
| - | pyserial |
نحوه نصب
نصب پکیج whl alicat-0.4.0:
pip install alicat-0.4.0.whl
نصب پکیج tar.gz alicat-0.4.0:
pip install alicat-0.4.0.tar.gz