Danfysik 8500 Power Supply
- class pymeasure.instruments.danfysik.Danfysik8500(adapter, name='Danfysik 8500 Current Supply', **kwargs)
Bases:
Instrument
Represents the Danfysik 8500 Electromanget Current Supply and provides a high-level interface for interacting with the instrument
To allow user access to the Prolific Technology PL2303 Serial port adapter in Linux, create the file:
/etc/udev/rules.d/50-danfysik.rules
, with contents:SUBSYSTEMS=="usb",ATTRS{idVendor}=="067b",ATTRS{idProduct}=="2303",MODE="0666",SYMLINK+="danfysik"
Then reload the udev rules with:
sudo udevadm control --reload-rules sudo udevadm trigger
The device will be accessible through the port
/dev/danfysik
.- add_ramp_step(current)
Adds a current step to the ramp set.
- Parameters
current – A current in Amps
- clear_ramp_set()
Clears the ramp set.
- clear_sequence(stack)
Clears the sequence by the stack number.
- Parameters
stack – A stack number between 0-15
- property current
Control the actual current in Amps. This property can be set through
current_ppm
.
- property current_ppm
Control the current in parts per million..
- property current_setpoint
Get the setpoint for the current, which can deviate from the actual current (
current
) while the supply is in the process of setting the value.
- disable()
Disables the flow of current.
- enable()
Enables the flow of current.
- property id
Get the idenfitication information.
- is_current_stable()
Returns True if the current is within 0.02 A of the setpoint value.
- is_enabled()
Returns True if the current supply is enabled.
- is_ready()
Returns True if the instrument is in the ready state.
- is_sequence_running(stack)
Returns True if a sequence is running with a given stack number
- Parameters
stack – A stack number between 0-15
- local()
Sets the instrument in local mode, where the front panel can be used.
- property polarity
Control the polarity of the current supply, being either -1 or 1. This property can be set by supplying one of these values.
- ramp_to_current(current, points, delay_time=1)
Executes
set_ramp_to_current()
and starts the ramp.
- read()
Read the device and raise exceptions if errors are reported by the instrument.
- Returns
String ASCII response of the instrument
- Raises
An
Exception
if the Danfysik raises an error
- remote()
Sets the instrument in remote mode, where the the front panel is disabled.
- reset_interlocks()
Resets the instrument interlocks.
- set_ramp_delay(time)
Sets the ramp delay time in seconds.
- Parameters
time – The time delay time in seconds
- set_ramp_to_current(current, points, delay_time=1)
Sets up a linear ramp from the initial current to a different current, with a number of points, and delay time.
- Parameters
current – The final current in Amps
points – The number of linear points to traverse
delay_time – A delay time in seconds
- set_sequence(stack, currents, times, multiplier=999999)
Sets up an arbitrary ramp profile with a list of currents (Amps) and a list of interval times (seconds) on the specified stack number (0-15)
- property slew_rate
Get the slew rate of the current sweep.
- start_ramp()
Starts the current ramp.
- start_sequence(stack)
Starts a sequence by the stack number.
- Parameters
stack – A stack number between 0-15
- property status
Get a list of human-readable strings that contain the instrument status information, based on
status_hex
.
- property status_hex
Get the status in hexadecimal. This value is parsed in
status
into a human-readable list.
- stop_ramp()
Stops the current ramp.
- stop_sequence()
Stops the currently running sequence.
- sync_sequence(stack, delay=0)
Arms the ramp sequence to be triggered by a hardware input to pin P33 1&2 (10 to 24 V) or a TS command. If a delay is provided, the sequence will start after the delay.
- Parameters
stack – A stack number between 0-15
delay – A delay time in seconds
- wait_for_current(has_aborted=<function Danfysik8500.<lambda>>, delay=0.01)
Blocks the process until the current has stabilized. A provided function
has_aborted
can be supplied, which is checked after each delay time (in seconds) in addition to the stability check. This allows an abort feature to be integrated.- Parameters
has_aborted – A function that returns True if the process should stop waiting
delay – The delay time in seconds between each check for stability
- wait_for_ready(has_aborted=<function Danfysik8500.<lambda>>, delay=0.01)
Blocks the process until the instrument is ready. A provided function
has_aborted
can be supplied, which is checked after each delay time (in seconds) in addition to the readiness check. This allows an abort feature to be integrated.- Parameters
has_aborted – A function that returns True if the process should stop waiting
delay – The delay time in seconds between each check for readiness