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#
# This file is part of the PyMeasure package.
#
# Copyright (c) 2013-2024 PyMeasure Developers
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
from pymeasure.instruments import Instrument, SCPIUnknownMixin
from pymeasure.instruments.validators import strict_discrete_set, strict_range
from pyvisa.errors import VisaIOError
class AgilentE4980(SCPIUnknownMixin, Instrument):
"""Represents LCR meter E4980A/AL"""
ac_voltage = Instrument.control(":VOLT:LEV?", ":VOLT:LEV %g",
"AC voltage level, in Volts",
validator=strict_range,
values=[0, 20])
ac_current = Instrument.control(":CURR:LEV?", ":CURR:LEV %g",
"AC current level, in Amps",
validator=strict_range,
values=[0, 0.1])
frequency = Instrument.control(":FREQ:CW?", ":FREQ:CW %g",
"AC frequency (range depending on model), in Hertz",
validator=strict_range,
values=[20, 2e6])
# FETCH? returns [A,B,state]: impedance returns only A,B
impedance = Instrument.measurement(
":FETCH?",
"Measured data A and B, according to :attr:`~.AgilentE4980.mode`",
get_process=lambda x: x[:2])
mode = Instrument.control("FUNCtion:IMPedance:TYPE?", "FUNCtion:IMPedance:TYPE %s",
"""
Select quantities to be measured:
* CPD: Parallel capacitance [F] and dissipation factor [number]
* CPQ: Parallel capacitance [F] and quality factor [number]
* CPG: Parallel capacitance [F] and parallel conductance [S]
* CPRP: Parallel capacitance [F] and parallel resistance [Ohm]
- CSD: Series capacitance [F] and dissipation factor [number]
- CSQ: Series capacitance [F] and quality factor [number]
- CSRS: Series capacitance [F] and series resistance [Ohm]
* LPD: Parallel inductance [H] and dissipation factor [number]
* LPQ: Parallel inductance [H] and quality factor [number]
* LPG: Parallel inductance [H] and parallel conductance [S]
* LPRP: Parallel inductance [H] and parallel resistance [Ohm]
- LSD: Series inductance [H] and dissipation factor [number]
- LSQ: Seriesinductance [H] and quality factor [number]
- LSRS: Series inductance [H] and series resistance [Ohm]
* RX: Resistance [Ohm] and reactance [Ohm]
* ZTD: Impedance, magnitude [Ohm] and phase [deg]
* ZTR: Impedance, magnitude [Ohm] and phase [rad]
* GB: Conductance [S] and susceptance [S]
* YTD: Admittance, magnitude [Ohm] and phase [deg]
* YTR: Admittance magnitude [Ohm] and phase [rad]
""",
validator=strict_discrete_set,
values=["CPD", "CPQ", "CPG", "CPRP",
"CSD", "CSQ", "CSRS",
"LPD", "LPQ", "LPG", "LPRP",
"LSD", "LSQ", "LSRS",
"RX", "ZTD", "ZTR", "GB", "YTD", "YTR", ])
trigger_source = Instrument.control("TRIG:SOUR?", "TRIG:SOUR %s",
"""
Select trigger source; accept the values:
* HOLD: manual
* INT: internal
* BUS: external bus (GPIB/LAN/USB)
* EXT: external connector""",
validator=strict_discrete_set,
values=["HOLD", "INT", "BUS", "EXT"])
def __init__(self, adapter, name="Agilent E4980A/AL LCR meter", **kwargs):
super().__init__(
adapter, name, **kwargs
)
self.timeout = 30000
# format: output ascii
self.write("FORM ASC")
def freq_sweep(self, freq_list, return_freq=False):
"""
Run frequency list sweep using sequential trigger.
:param freq_list: list of frequencies
:param return_freq: if True, returns the frequencies read from the instrument
Returns values as configured with :attr:`~.AgilentE4980.mode`
"""
# manual, page 299
# self.write("*RST;*CLS")
self.write("TRIG:SOUR BUS")
self.write("DISP:PAGE LIST")
self.write("FORM ASC")
# trigger in sequential mode
self.write("LIST:MODE SEQ")
lista_str = ",".join(['%e' % f for f in freq_list])
self.write("LIST:FREQ %s" % lista_str)
# trigger
self.write("INIT:CONT ON")
self.write(":TRIG:IMM")
# wait for completed measurement
# using the Error signal (there should be a better way)
while 1:
try:
measured = self.values(":FETCh:IMPedance:FORMatted?")
break
except VisaIOError:
pass
# at the end return to manual trigger
self.write(":TRIG:SOUR HOLD")
# gets 4-ples of numbers, first two are data A and B
a_data = [measured[_] for _ in range(0, 4 * len(freq_list), 4)]
b_data = [measured[_] for _ in range(1, 4 * len(freq_list), 4)]
if return_freq:
read_freqs = self.values("LIST:FREQ?")
return a_data, b_data, read_freqs
else:
return a_data, b_data
# TODO: maybe refactor as property?
def aperture(self, time=None, averages=1):
"""
Set and get aperture.
:param time: integration time as string: SHORT, MED, LONG (case insensitive);
if None, get values
:param averages: number of averages, numeric
"""
if time is None:
read_values = self.ask(":APER?").split(',')
return read_values[0], int(read_values[1])
else:
if time.upper() in ["SHORT", "MED", "LONG"]:
self.write(f":APER {time}, {averages}")
else:
raise Exception("Time must be a string: SHORT, MED, LONG")
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