photons.equipment.dmm_34401a module

Hewlett Packard 34401A digital multimeter.

class photons.equipment.dmm_34401a.HP34401A(record, **kwargs)

Bases: DMM

Hewlett Packard 34401A digital multimeter.

Parameters:

• record (EquipmentRecord) – The equipment record.

• **kwargs – Keyword arguments. Can be specified as attributes of an XML element in a configuration file (with the tag of the element equal to the alias of record).

abort()

Abort a measurement in progress.

Return type:

None

check_errors()

Query the error queue.

Raises an exception if there is an error.

Return type:

None

configure(*, function=Function.DCV, range=10, nsamples=10, nplc=10, auto_zero=Auto.ON, trigger=Mode.IMMEDIATE, edge=Edge.FALLING, ntriggers=1, delay=None)

Configure the digital multimeter.

Parameters:

• function (Function | str) – The measurement function.

• range (Range | str | float) – The range to use for the measurement.

• nsamples (int) – The number of samples to acquire after a trigger event.

• nplc (float) – The number of power-line cycles.

• auto_zero (Auto | bool | int | str) – The auto-zero mode.

• trigger (Mode | str) – The trigger mode.

• edge (Edge | str) – The edge to trigger on.

• ntriggers (int) – The number of triggers that are accepted before returning to the wait-for-trigger state.

• delay (float) – The number of seconds to wait after a trigger event before acquiring samples. If None, then the auto-delay feature is enabled where the digital multimeter automatically determines the delay based on the function, range and NPLC.

Return type:

Settings

Returns:

The result of settings() after applying the configuration.

disconnect_equipment()

Set the digital multimeter to be in LOCAL mode and then close the connection.

Return type:

None

fetch(initiate=False)

Fetch the samples.

Parameters:

initiate (bool) – Whether to call initiate() before fetching the data.

Return type:

Samples

local_mode()

Set the multimeter to be in LOCAL mode for the RS-232 interface.

All keys on the front panel are fully functional.

Return type:

None

remote_mode()

Set the multimeter to be in REMOTE mode for the RS-232 interface.

All keys on the front panel, except the LOCAL key, are disabled.

Return type:

None

settings()

Returns the configuration settings of the digital multimeter.

Return type:

Settings