Picowatt¶

`PicowattAVS47` Resistance Bridge¶

class instruments.picowatt.PicowattAVS47(filelike)¶

The Picowatt AVS 47 is a resistance bridge used to measure the resistance of low-temperature sensors.

Example usage:

>>> import instruments as ik
>>> bridge = ik.picowatt.PicowattAVS47.open_gpibusb('/dev/ttyUSB0', 1)
>>> print bridge.sensor[0].resistance

class InputSource¶

Enum containing valid input source modes for the AVS 47

class PicowattAVS47.Sensor(parent, idx)¶

Class representing a sensor on the PicowattAVS47

Warning

This class should NOT be manually created by the user. It is designed to be initialized by the PicowattAVS47 class.

resistance¶

Gets the resistance. It first ensures that the next measurement reading is up to date by first sending the “ADC” command.

Units:	\(\Omega\) (ohms)
Return type:	`Quantity`

PicowattAVS47.display¶

Gets/sets the sensor that is displayed on the front panel.

Valid display sensor values are 0 through 7 (inclusive).

Type:	`int`

PicowattAVS47.excitation¶

Gets/sets the excitation sensor number.

Valid excitation sensor values are 0 through 7 (inclusive).

Type:	`int`

PicowattAVS47.input_source¶

Gets/sets the input source.

Type:	`PicowattAVS47.InputSource`

PicowattAVS47.mux_channel¶

Gets/sets the multiplexer sensor number. It is recommended that you ground the input before switching the multiplexer channel.

Valid mux channel values are 0 through 7 (inclusive).

Type:	`int`

PicowattAVS47.remote¶

Gets/sets the remote mode state.

Enabling the remote mode allows all settings to be changed by computer interface and locks-out the front panel.

Type:	`bool`

PicowattAVS47.sensor¶

Gets a specific sensor object. The desired sensor is specified like one would access a list.

Return type:	`Sensor`