# devices.keithley:Keithley2450


Class for controlling Keithley 2450 SourceMeter.


Usage

``` python
devices.keithley:Keithley2450(
    interface,
    **kwargs,
)
```


Provides methods to configure and control the Keithley 2450 source measurement unit for various sourcing and measurement operations.


## Methods

| Name | Description |
|----|----|
| [__init__()](#__init__) | Initialize the Keithley 2450 SourceMeter. |
| [configure()](#configure) | Configure the Keithley 2450 to source current and sense voltage. |
| [getSense()](#getSense) | Get the current sense value from the instrument. |
| [getSource()](#getSource) | Get the current source value from the instrument. |
| [setSource()](#setSource) | Set the source value. |

------------------------------------------------------------------------


### \_\_init\_\_()


Initialize the Keithley 2450 SourceMeter.


Usage

``` python
__init__(
    interface,
    **kwargs,
)
```


#### Parameters


`interface: str`  
VISA resource name for the instrument

`**kwargs: dict`  
Additional arguments to pass to the VISA device initialization


------------------------------------------------------------------------


### configure()


Configure the Keithley 2450 to source current and sense voltage.


Usage

``` python
configure(
    sourceMode=None,
    senseMode=None,
    fourWire=None,
    senseAutoRange=None,
    senseRange=None,
    sourceAutoRange=None,
    sourceRange=None,
    senseLimit=None,
    output=None,
    delayAuto=None,
    delay=None,
    resetUnits=True,
    reset=False,
)
```


#### Parameters


`sourceMode: str = None`  
"VOLT" or "CURR", physical parameter to source.

`senseMode: str = None`  
"VOLT" or "CURR", parameter to measure.

`fourWire: bool = None`  
Four wire measurement; None uses the current configuration.

`senseAutoRange: bool = None`  
Autodetect the sense range.

`senseRange: float = None`  
Largest expected measurement value; the device picks the next inclusive range.

`sourceAutoRange: bool = None`  
Autodetect the source range.

`sourceRange: float = None`  
Largest expected source current; the device picks the next inclusive range.

`senseLimit: float = None`  
Voltage limit.

`output: bool = None`  
Turn the output on.

`delayAuto: bool = None`  
Automatically choose the delay for stabilizing the output.

`delay: float = None`  
Delay in seconds for stabilizing the output before doing an internal measurement. Does not affect other devices.

`resetUnits: bool = ``True`  
If True, Ampere and Volt are restored as default units for current and voltage measurements. Default is True.

`reset: bool = ``False`  
If True, reset the device.


#### Examples

``` python
>>> device.configure(sourceMode="CURR", senseMode="VOLT",
...                 fourWire=True, senseAutoRange=True,
...                 sourceRange=0.001, output=True)
```


#### Notes

The output will initially be turned off during configuration. This will configure the Keithley to be in 4W sense mode, detect the sense range automatically. The range is chosen to include 1mA and the output is turned on.

------------------------------------------------------------------------


### getSense()


Get the current sense value from the instrument.


Usage

``` python
getSense()
```


#### Returns


`float`  
The measured sense value


------------------------------------------------------------------------


### getSource()


Get the current source value from the instrument.


Usage

``` python
getSource()
```


#### Returns


`float`  
The measured source value


------------------------------------------------------------------------


### setSource()


Set the source value.


Usage

``` python
setSource(current)
```


#### Parameters


`current: float`  
The value to set for the source, either voltage or current depending on the source mode