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: Any

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 – 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 – 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 – List of error entries.

clear()

Clears the instrument status byte

Return type:

None

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: Any

Get the configuration

property frequency: Any

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: Any

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.

Return type:

str

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).

Return type:

bytes

reset()

Resets the instrument.

shutdown()

Brings the instrument to a safe and stable state

Return type:

None

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: Any

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=None)

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

Parameters:

query_delay (Optional[float]) – Delay between writing and reading in seconds. None is default delay. (default: None)

Return type:

None

write(command, **kwargs)

Write a string command to the instrument appending write_termination.

Parameters:

• command (str) – command string to be sent to the instrument

• kwargs – Keyword arguments for the adapter.

Return type:

None

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

Write binary values to the device.

Parameters:

• command (str) – Command to send.

• values (Sequence[Union[int, float]]) – The values to transmit.

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

Return type:

None

write_bytes(content, **kwargs)

Write the bytes content to the instrument.

Return type:

None