Picowatt

`PicowattAVS47` Resistance Bridge

class instruments.picowatt.PicowattAVS47(filelike)[source]

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(*values)[source]

Enum containing valid input source modes for the AVS 47

class Sensor(parent, idx)[source]

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.

property resistance

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

property display

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

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

property excitation

Gets/sets the excitation sensor number.

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

property input_source

Gets/sets the input source.

property 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).

property 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.

property sensor

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