Danfysik 8500 Power Supply¶
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class
pymeasure.instruments.danfysik.
Danfysik8500
(port)¶ Bases:
pymeasure.instruments.instrument.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
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add_ramp_step
(current)¶ Adds a current step to the ramp set.
Parameters: current – A current in Amps
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clear_ramp_set
()¶ Clears the ramp set.
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clear_sequence
(stack)¶ Clears the sequence by the stack number.
Parameters: stack – A stack number between 0-15
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current
¶ The actual current in Amps. This property can be set through
current_ppm
.
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current_ppm
¶ The current in parts per million. This property can be set.
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current_setpoint
¶ The setpoint for the current, which can deviate from the actual current (
current
) while the supply is in the process of setting the value.
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disable
()¶ Disables the flow of current.
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enable
()¶ Enables the flow of current.
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id
¶ Reads the idenfitication information.
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is_current_stable
()¶ Returns True if the current is within 0.02 A of the setpoint value.
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is_enabled
()¶ Returns True if the current supply is enabled.
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is_ready
()¶ Returns True if the instrument is in the ready state.
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is_sequence_running
(stack)¶ Returns True if a sequence is running with a given stack number
Parameters: stack – A stack number between 0-15
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local
()¶ Sets the instrument in local mode, where the front panel can be used.
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polarity
¶ The polarity of the current supply, being either -1 or 1. This property can be set by suppling one of these values.
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ramp_to_current
(current, points, delay_time=1)¶ Executes
set_ramp_to_current()
and starts the ramp.
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remote
()¶ Sets the instrument in remote mode, where the the front panel is disabled.
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reset_interlocks
()¶ Resets the instrument interlocks.
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set_ramp_delay
(time)¶ Sets the ramp delay time in seconds.
Parameters: time – The time delay time in seconds
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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
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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)
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slew_rate
¶ The slew rate of the current sweep.
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start_ramp
()¶ Starts the current ramp.
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start_sequence
(stack)¶ Starts a sequence by the stack number.
Parameters: stack – A stack number between 0-15
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status
¶ A list of human-readable strings that contain the instrument status information, based on
status_hex
.
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stop_ramp
()¶ Stops the current ramp.
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stop_sequence
()¶ Stops the currently running sequence.
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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
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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
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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
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