Andeen Hagerling AH2700A capacitance bridge

class pymeasure.instruments.andeenhagerling.AH2700A(adapter, name='Andeen Hagerling 2700A Precision Capacitance Bridge', timeout=5000, **kwargs)

Bases: AH2500A

Andeen Hagerling 2700A Precision Capacitance Bridge implementation

property caplossvolt

Get the result of a single capacitance, loss measurement and return the values in units of pF and nS. The used measurement voltage is returned as third value.

check_errors()

Read all errors from the instrument and log them.

Returns

List of error entries.

check_get_errors()

Check for errors after having gotten a property and log them.

Called if check_get_errors=True is set for that property.

If you override this method, you may choose to raise an Exception for certain errors.

Returns

List of error entries.

check_set_errors()

Check for errors after having set a property and log them.

Called if check_set_errors=True is set for that property.

If you override this method, you may choose to raise an Exception for certain errors.

Returns

List of error entries.

clear()

Clears the instrument status byte

property complete

Get the synchronization bit.

This property allows synchronization between a controller and a device. The Operation Complete query places an ASCII character 1 into the device’s Output Queue when all pending selected device operations have been finished.

property config

Get the configuration

property frequency

Control test frequency used for the measurements. Allowed are values between 50 and 20000 Hz. The device selects the closest possible frequency to the given value.

property id

Get the instrument identification

property next_error

Get the next error of the instrument (tuple of code and message).

property options

Get the device options installed.

read(**kwargs)

Read up to (excluding) read_termination or the whole read buffer.

read_binary_values(**kwargs)

Read binary values from the device.

read_bytes(count, **kwargs)

Read a certain number of bytes from the instrument.

Parameters

• count (int) – Number of bytes to read. A value of -1 indicates to read the whole read buffer.

• kwargs – Keyword arguments for the adapter.

Returns bytes

Bytes response of the instrument (including termination).

reset()

Resets the instrument.

shutdown()

Brings the instrument to a safe and stable state

property status

Get the status byte and Master Summary Status bit.

trigger()

Triggers a new measurement without blocking and waiting for the return value.

triggered_caplossvolt()

reads the measurement value after the device was triggered by the trigger function.

property vhighest

Control maximum RMS value of the used measurement voltage. Values of up to 15 V are allowed. The device will select the best suiting range below the given value.

wait_for(query_delay=0)

Wait for some time. Used by ‘ask’ to wait before reading.

Parameters

query_delay – Delay between writing and reading in seconds.

write(command, **kwargs)

Write a string command to the instrument appending write_termination.

Parameters

• command – command string to be sent to the instrument

• kwargs – Keyword arguments for the adapter.

write_binary_values(command, values, *args, **kwargs)

Write binary values to the device.

Parameters

• command – Command to send.

• values – The values to transmit.

• **kwargs (*args,) – Further arguments to hand to the Adapter.

write_bytes(content, **kwargs)

Write the bytes content to the instrument.