pcdsdevices.lakeshore.Lakeshore336

class pcdsdevices.lakeshore.Lakeshore336(*args, **kwargs)

This class supports the Lakeshore Model 336 Temperature controller.

It includes: 2 loops for setting the temperature 2 range controls for the heater 2 sets of controls for manual and analog output 4 temperature sensors Various read-only signals.

Ophyd Device Components

Attribute	Class	Suffix	Docs	Kind	Notes
set_temp_loop_1	EpicsSignal	:GET_SOLL_1		normal
set_temp_loop_2	EpicsSignal	:GET_SOLL_2		normal
man_loop_1	EpicsSignal	:GET_MOUT_1		normal
man_loop_2	EpicsSignal	:GET_MOUT_2		normal
an_loop_3	EpicsSignal	:GET_AOUT_3		normal
an_loop_4	EpicsSignal	:GET_AOUT_4		normal
set_heater_1	Heater			normal
set_heater_2	Heater			normal
temp_A	TemperatureSensor			normal
temp_B	TemperatureSensor			normal
temp_C	TemperatureSensor			normal
temp_D	TemperatureSensor			normal
mode	EpicsSignal	GET_MODE	control mode	normal
loop_ramp_1	EpicsSignalRO	:GET_RAMP_1		normal
loop_ramp_2	EpicsSignalRO	:GET_RAMP_2		normal
htr_out_1	EpicsSignalRO	:GET_HTR_1		normal
htr_out_2	EpicsSignalRO	:GET_HTR_2		normal

Methods

configure(d: Dict[str, Any]) → Tuple[Dict[str, Any], Dict[str, Any]]

Configure the device for something during a run

This default implementation allows the user to change any of the configuration_attrs. Subclasses might override this to perform additional input validation, cleanup, etc.

Parameters:

d (dict) – The configuration dictionary. To specify the order that the changes should be made, use an OrderedDict.

Returns:

• (old, new) tuple of dictionaries

• Where old and new are pre- and post-configure configuration states.

describe() → OrderedDictType[str, Dict[str, Any]]

Provide schema and meta-data for read().

This keys in the OrderedDict this method returns must match the keys in the OrderedDict return by read().

This provides schema related information, (ex shape, dtype), the source (ex PV name), and if available, units, limits, precision etc.

Returns:

data_keys (OrderedDict) – The keys must be strings and the values must be dict-like with the event_model.event_descriptor.data_key schema.

get(**kwargs)

Get the value of all components in the device

Keyword arguments are passed onto each signal.get(). Components beginning with an underscore will not be included.

post_elog_status()

Post device status to the primary elog, if possible.

read() → OrderedDictType[str, Dict[str, Any]]

Read data from the device.

This method is expected to be as instantaneous as possible, with any substantial acquisition time taken care of in trigger().

The OrderedDict returned by this method must have identical keys (in the same order) as the OrderedDict returned by describe().

By convention, the first key in the return is the ‘primary’ key and maybe used by heuristics in bluesky.

The values in the ordered dictionary must be dict (-likes) with the keys {'value', 'timestamp'}. The 'value' may have any type, the timestamp must be a float UNIX epoch timestamp in UTC.

Returns:

data (OrderedDict) – The keys must be strings and the values must be dict-like with the keys {'value', 'timestamp'}

read_configuration() → OrderedDictType[str, Dict[str, Any]]

Dictionary mapping names to value dicts with keys: value, timestamp

To control which fields are included, change the Component kinds on the device, or modify the configuration_attrs list.

screen()

Open a screen for controlling the device.

Default behavior is the typhos screen, but this method can be overridden for more specialized screens.

classmethod set_defaults(*, connection_timeout=10.0)

Set class-wide defaults for device communications

This may be called only before any instances of Device are made.

This setting applies to the class it is called on and all its subclasses. For example,

>>> Device.set_defaults(...)

will apply to any Device subclass.

Parameters:

connection_timeout (float, optional) – Time (seconds) allocated for establishing a connection with the IOC.

Raises:

RuntimeError – If called after EpicsSignalBase has been instantiated for the first time.

status() → str

Returns a str with the current pv values for the device.

stop(*, success=False)

Stop the Device and all (instantiated) subdevices

summary()

trigger() → StatusBase

Trigger the device and return status object.

This method is responsible for implementing ‘trigger’ or ‘acquire’ functionality of this device.

If there is an appreciable time between triggering the device and it being able to be read (via the read() method) then this method is also responsible for arranging that the StatusBase object returned by this method is notified when the device is ready to be read.

If there is no delay between triggering and being readable, then this method must return a StatusBase object which is already completed.

Returns:

status (StatusBase) – StatusBase object which will be marked as complete when the device is ready to be read.

Attributes

configuration_attrs

connected

connection_timeout

hints

kind

subscriptions: ClassVar[FrozenSet[str]] = frozenset({'acq_done'})