devices.lakeshore:Lakeshore340

Interface for Lakeshore 340 temperature controller.

Usage

Source

devices.lakeshore:Lakeshore340(
    interface,
    **kwargs,
)

Extends the base Lakeshore3xx class with specific features for the Lakeshore 340 model.

Methods

Name Description
__init__() Initialize Lakeshore 340 temperature controller.
getHeaterRange() Get the heater range setting.
setHeaterRange() Set the heater range.
writeCurveToIndex() Write a calibration curve to the device.
writeZonePID() Write Zone PID settings to the controller.

__init__()

Initialize Lakeshore 340 temperature controller.

Usage

Source

__init__(
    interface,
    **kwargs,
)

Parameters

interface: str

VISA resource string for the instrument.

**kwargs: dict
Additional keyword arguments.
  • baud_rate: Serial communication baud rate (default: 19200)

getHeaterRange()

Get the heater range setting.

Usage

Source

getHeaterRange()

Returns

int
Current heater range setting (0-5).

setHeaterRange()

Set the heater range.

Usage

Source

setHeaterRange(heaterRange)

Parameters

heaterRange: int
Heater range to set (0-5). 0: Off, 1: Low, 2: Medium, 3: High, etc.

writeCurveToIndex()

Write a calibration curve to the device.

Usage

Source

writeCurveToIndex(
    index,
    name,
    sn,
    rList,
    tList,
)

Parameters

index: int

Index to store the curve at (21-60).

name: str

Name of the curve.

sn: str

Serial number of the sensor.

rList: List[float]

List of resistance values.

tList: List[float]
List of temperature values.

Notes

Only supports Cernox sensors currently. Maximum length of tList and rList is 199.

writeZonePID()

Write Zone PID settings to the controller.

Usage

Source

writeZonePID(
    templist,
    plist,
    ilist,
    dlist,
    rangelist,
    loop=1,
)

Parameters

templist: List[float]

Upper temperature limits for each zone (must be sorted from low to high).

plist: List[float]

P (proportional) parameters for each temperature zone.

ilist: List[float]

I (integral) parameters for each temperature zone.

dlist: List[float]

D (derivative) parameters for each temperature zone.

rangelist: List[int]

Heater range settings for each temperature zone (0-5).

loop: int = 1
Control loop number, by default 1.

Notes

All lists can have at most 10 entries. Enables automatic adjustment of PID parameters based on temperature.