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HP_3457A.py
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HP_3457A.py
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import serial # pySerial
import time
class hp(object):
def readline(self):
result = bytearray()
c = 0
while c != b'\r':
c = self.ser.read()
result += c
return result.decode()
def __init__(self, com):
self.unit = "dcv"
self.gotPlc = False
self.plc = 10
self.digits = '7.5'
self.ser = serial.Serial(com, 460800, parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE,
bytesize=serial.EIGHTBITS, timeout=3)
self.ser.write(b'++rst\r\n')
time.sleep(2)
self.ser.write(b'++addr 22\r\n')
self.ser.write(b'++eoi 0\r\n')
self.ser.write(b'++eos 0\r\n')
self.ser.write(b'++read_tmo_ms 5000\r\n')
self.ser.write(b'END ALWAYS\r\n')
self.ser.write(b'ID?\r\n')
if "HP3457" not in self.readline():
print("check connections and settings")
self.ser.write(b'DCV\r\n')
self.ser.write(b'TRIG SYN\r\n')
def get_offset(self, unit, value):
digit = self.get_digits()
plc = str(self.get_plc())
if float(plc) >= 1:
plc = "1"
elif float(plc) == float(.1):
plc = ".1"
elif float(plc) == float(.005):
plc = ".005"
elif float(plc) == float(.0005):
plc = ".0005"
if float(digit) > 6.5:
digit = '6.5'
# DC Volts Spec
dcv_res = {'30mv': {'6.5': 10e-9, '5.5': 100e-9, '4.5': 1e-6, '3.5': 10e-6},
'300mv': {'6.5': 100e-9, '5.5': 1e-6, '4.5': 10e-6, '3.5': 100e-6},
'3v': {'6.5': 1e-6, '5.5': 10e-6, '4.5': 100e-6, '3.5': 1e-3},
'30v': {'6.5': 10e-6, '5.5': 100e-6, '4.5': 1e-3, '3.5': 10e-3},
'300v': {'6.5': 100e-6, '5.5': 1e-3, '4.5': 10e-3, '3.5': 100e-3}
}
dcv_acc = {'30mv': {'100': {'acc': .0045, 'counts': 365}, '10': {'acc': .0045, 'counts': 385},
'1': {'acc': .0045, 'counts': 500}, '.1': {'acc': .0045, 'counts': 70},
'.005': {'acc': .0045, 'counts': 19}, '.0005': {'acc': .0045, 'counts': 6}},
'300mv': {'100': {'acc': .0035, 'counts': 39}, '10': {'acc': .0035, 'counts': 40},
'1': {'acc': .0035, 'counts': 50}, '.1': {'acc': .0035, 'counts': 9},
'.005': {'acc': .0035, 'counts': 4}, '.0005': {'acc': .0035, 'counts': 4}},
'3v': {'100': {'acc': .0025, 'counts': 6}, '10': {'acc': .0025, 'counts': 7},
'1': {'acc': .0025, 'counts': 7}, '.1': {'acc': .0025, 'counts': 4},
'.005': {'acc': .0025, 'counts': 4}, '.0005': {'acc': .0025, 'counts': 4}},
'30v': {'100': {'acc': .0040, 'counts': 19}, '10': {'acc': .0040, 'counts': 20},
'1': {'acc': .0040, 'counts': 30}, '.1': {'acc': .0040, 'counts': 7},
'.005': {'acc': .0040, 'counts': 4}, '.0005': {'acc': .0040, 'counts': 4}},
'300v': {'100': {'acc': .0055, 'counts': 6}, '10': {'acc': .0055, 'counts': 7},
'1': {'acc': .0055, 'counts': 7}, '.1': {'acc': .0055, 'counts': 4},
'.005': {'acc': .0055, 'counts': 4}, '.0005': {'acc': .0055, 'counts': 4}}
}
# DC Current Spec
dci_res = {'300ua': {'6.5': 100e-12, '5.5': 1e-9, '4.5': 10e-9, '3.5': 100e-9},
'3ma': {'6.5': 1e-9, '5.5': 10e-9, '4.5': 100e-9, '3.5': 1e-6},
'30ma': {'6.5': 10e-9, '5.5': 100e-9, '4.5': 1e-6, '3.5': 10e-6},
'300ma': {'6.5': 100e-9, '5.5': 1e-6, '4.5': 10e-6, '3.5': 100e-6},
'1a': {'6.5': 1e-6, '5.5': 10e-6, '4.5': 100e-6, '3.5': 1e-3}
}
dci_acc = {'300ua': {'100': {'acc': .04, 'counts': 104}, '10': {'acc': .04, 'counts': 104},
'1': {'acc': .04, 'counts': 115}, '.1': {'acc': .04, 'counts': 14},
'.005': {'acc': .04, 'counts': 5}, '.0005': {'acc': .04, 'counts': 4}},
'3ma': {'100': {'acc': .04, 'counts': 104}, '10': {'acc': .04, 'counts': 104},
'1': {'acc': .04, 'counts': 115}, '.1': {'acc': .04, 'counts': 14},
'.005': {'acc': .04, 'counts': 5}, '.0005': {'acc': .04, 'counts': 4}},
'30ma': {'100': {'acc': .04, 'counts': 104}, '10': {'acc': .04, 'counts': 104},
'1': {'acc': .04, 'counts': 115}, '.1': {'acc': .04, 'counts': 14},
'.005': {'acc': .04, 'counts': 5}, '.0005': {'acc': .04, 'counts': 4}},
'300ma': {'100': {'acc': .08, 'counts': 204}, '10': {'acc': .08, 'counts': 204},
'1': {'acc': .08, 'counts': 215}, '.1': {'acc': .08, 'counts': 24},
'.005': {'acc': .08, 'counts': 6}, '.0005': {'acc': .08, 'counts': 4}},
'1a': {'100': {'acc': .08, 'counts': 604}, '10': {'acc': .08, 'counts': 604},
'1': {'acc': .08, 'counts': 615}, '.1': {'acc': .08, 'counts': 64},
'.005': {'acc': .08, 'counts': 10}, '.0005': {'acc': .08, 'counts': 5}}
}
# 2-wire and 4-wire ohms
ohms_res = {'30': {'6.5': 10e-6, '5.5': 100e-6, '4.5': 1e-3, '3.5': 10e-3},
'300': {'6.5': 100e-6, '5.5': 1e-3, '4.5': 10e-3, '3.5': 100e-3},
'3k': {'6.5': 1e-3, '5.5': 10e-3, '4.5': 100e-3, '3.5': 1},
'30k': {'6.5': 10e-3, '5.5': 100e-3, '4.5': 1, '3.5': 10},
'300k': {'6.5': 100e-3, '5.5': 1, '4.5': 10, '3.5': 100},
'3m': {'6.5': 1, '5.5': 10, '4.5': 100, '3.5': 1e3},
'30m': {'6.5': 10, '5.5': 100, '4.5': 1e3, '3.5': 10e3},
'300m': {'6.5': 100, '5.5': 1e3, '4.5': 10e3, '3.5': 100e3},
'3g': {'6.5': 1e3, '5.5': 10e3, '4.5': 100e3, '3.5': 1e6}
}
ohms4_acc = {'30': {'100': {'acc': .0075, 'counts': 315}, '10': {'acc': .0075, 'counts': 335},
'1': {'acc': .0075, 'counts': 450}, '.1': {'acc': .0075, 'counts': 65},
'.0075': {'acc': .0075, 'counts': 18}, '.0005': {'acc': .0075, 'counts': 6}},
'300': {'100': {'acc': .0055, 'counts': 34}, '10': {'acc': .0055, 'counts': 35},
'1': {'acc': .0055, 'counts': 45}, '.1': {'acc': .0055, 'counts': 8},
'.0055': {'acc': .0055, 'counts': 4}, '.0005': {'acc': .0055, 'counts': 4}},
'3k': {'100': {'acc': .005, 'counts': 6}, '10': {'acc': .005, 'counts': 7},
'1': {'acc': .005, 'counts': 7}, '.1': {'acc': .005, 'counts': 4},
'.005': {'acc': .005, 'counts': 4}, '.0005': {'acc': .005, 'counts': 4}},
'30k': {'100': {'acc': .005, 'counts': 6}, '10': {'acc': .005, 'counts': 7},
'1': {'acc': .005, 'counts': 7}, '.1': {'acc': .005, 'counts': 4},
'.005': {'acc': .005, 'counts': 4}, '.0005': {'acc': .005, 'counts': 4}},
'300k': {'100': {'acc': .005, 'counts': 7}, '10': {'acc': .005, 'counts': 8},
'1': {'acc': .005, 'counts': 9}, '.1': {'acc': .005, 'counts': 4},
'.005': {'acc': .005, 'counts': 4}, '.0005': {'acc': .005, 'counts': 4}},
'3m': {'100': {'acc': .0065, 'counts': 12}, '10': {'acc': .0065, 'counts': 14},
'1': {'acc': .0065, 'counts': 16}, '.1': {'acc': .0065, 'counts': 7},
'.0065': {'acc': .0065, 'counts': 5}, '.0005': {'acc': .0065, 'counts': 5}},
'30m': {'100': {'acc': .04, 'counts': 80}, '10': {'acc': .04, 'counts': 83},
'1': {'acc': .04, 'counts': 93}, '.1': {'acc': .04, 'counts': 14},
'.04': {'acc': .04, 'counts': 6}, '.0005': {'acc': .04, 'counts': 5}}
}
ohms2_acc = {'30': {'100': {'acc': .0075, 'counts': 20315}, '10': {'acc': .0075, 'counts': 20335},
'1': {'acc': .0075, 'counts': 20450}, '.1': {'acc': .0075, 'counts': 20065},
'.0075': {'acc': .0075, 'counts': 20018}, '.0005': {'acc': .0075, 'counts': 20006}},
'300': {'100': {'acc': .0055, 'counts': 2034}, '10': {'acc': .0055, 'counts': 2035},
'1': {'acc': .0055, 'counts': 2045}, '.1': {'acc': .0055, 'counts': 2008},
'.0055': {'acc': .0055, 'counts': 2004}, '.0005': {'acc': .0055, 'counts': 2004}},
'3k': {'100': {'acc': .005, 'counts': 206}, '10': {'acc': .005, 'counts': 207},
'1': {'acc': .005, 'counts': 207}, '.1': {'acc': .005, 'counts': 204},
'.005': {'acc': .005, 'counts': 204}, '.0005': {'acc': .005, 'counts': 204}},
'30k': {'100': {'acc': .005, 'counts': 26}, '10': {'acc': .005, 'counts': 27},
'1': {'acc': .005, 'counts': 27}, '.1': {'acc': .005, 'counts': 24},
'.005': {'acc': .005, 'counts': 24}, '.0005': {'acc': .005, 'counts': 24}},
'300k': {'100': {'acc': .005, 'counts': 9}, '10': {'acc': .005, 'counts': 10},
'1': {'acc': .005, 'counts': 11}, '.1': {'acc': .005, 'counts': 6},
'.005': {'acc': .005, 'counts': 6}, '.0005': {'acc': .005, 'counts': 6}},
'3m': {'100': {'acc': .0065, 'counts': 12}, '10': {'acc': .0065, 'counts': 14},
'1': {'acc': .0065, 'counts': 16}, '.1': {'acc': .0065, 'counts': 7},
'.0065': {'acc': .0065, 'counts': 5}, '.0005': {'acc': .0065, 'counts': 5}},
'30m': {'100': {'acc': .04, 'counts': 80}, '10': {'acc': .04, 'counts': 83},
'1': {'acc': .04, 'counts': 93}, '.1': {'acc': .04, 'counts': 14},
'.04': {'acc': .04, 'counts': 6}, '.0005': {'acc': .04, 'counts': 5}},
'300m': {'100': {'acc': 1.6, 'counts': 1000}, '10': {'acc': 1.6, 'counts': 1000},
'1': {'acc': 1.6, 'counts': 1000}, '.1': {'acc': 1.6, 'counts': 100},
'1.6': {'acc': 1.6, 'counts': 10}, '.0005': {'acc': 1.6, 'counts': 1}},
'3g': {'100': {'acc': 16, 'counts': 1000}, '10': {'acc': 16, 'counts': 1000},
'1': {'acc': 16, 'counts': 1000}, '.1': {'acc': 16, 'counts': 100},
'16': {'acc': 16, 'counts': 10}, '.0005': {'acc': 16, 'counts': 1}}
}
# AC Voltage Spec 90 day spec
acv_res = {'30mv': {'6.5': 10e-9, '5.5': 100e-9, '4.5': 1e-6, '3.5': 10e-6},
'300mv': {'6.5': 100e-9, '5.5': 1e-6, '4.5': 10e-6, '3.5': 100e-6},
'3v': {'6.5': 1e-6, '5.5': 10e-6, '4.5': 100e-6, '3.5': 1e-3},
'30v': {'6.5': 10e-6, '5.5': 100e-6, '4.5': 1e-3, '3.5': 10e-3},
'300v': {'6.5': 100e-6, '5.5': 1e-3, '4.5': 10e-3, '3.5': 100e-3}
}
acv_lo_acc = {
'20': {'1': {'acc': .62, 'counts': 1120}, '.1': {'acc': .62, 'counts': 116},
'.005': {'acc': .62, 'counts': 16},
'.0005': {'acc': .62, 'counts': 6}},
'45': {'1': {'acc': .21, 'counts': 1120}, '.1': {'acc': .21, 'counts': 116},
'.005': {'acc': .21, 'counts': 16},
'.0005': {'acc': .21, 'counts': 6}},
'100': {'1': {'acc': .13, 'counts': 1120}, '.1': {'acc': .13, 'counts': 116},
'.005': {'acc': .13, 'counts': 16}, '.0005': {'acc': .13, 'counts': 6}},
'400': {'1': {'acc': .14, 'counts': 1120}, '.1': {'acc': .14, 'counts': 550},
'.005': {'acc': .14, 'counts': 59}, '.0005': {'acc': .14, 'counts': 10}},
'20000': {'1': {'acc': .66, 'counts': 2100}, '.1': {'acc': .66, 'counts': 224},
'.005': {'acc': .66, 'counts': 27}, '.0005': {'acc': .66, 'counts': 7}},
'100000': {'1': {'acc': 3.16, 'counts': 9700}, '.1': {'acc': 3.16, 'counts': 974},
'.005': {'acc': 3.16, 'counts': 102}, '.0005': {'acc': 3.16, 'counts': 14}},
'300000': {'1': {'acc': 10.16, 'counts': 66400}, '.1': {'acc': 10.16, 'counts': 6640},
'.005': {'acc': 10.16, 'counts': 668}, '.0005': {'acc': 10.16, 'counts': 71}}
}
acv_hi_acc = {
'20': {'1': {'acc': .62, 'counts': 1120}, '.1': {'acc': .62, 'counts': 116},
'.005': {'acc': .62, 'counts': 16},
'.0005': {'acc': .62, 'counts': 6}},
'45': {'1': {'acc': .27, 'counts': 1120}, '.1': {'acc': .27, 'counts': 116},
'.005': {'acc': .27, 'counts': 16},
'.0005': {'acc': .27, 'counts': 6}},
'100': {'1': {'acc': .19, 'counts': 1120}, '.1': {'acc': .19, 'counts': 116},
'.005': {'acc': .19, 'counts': 16}, '.0005': {'acc': .19, 'counts': 6}},
'400': {'1': {'acc': .2, 'counts': 1120}, '.1': {'acc': .2, 'counts': 550},
'.005': {'acc': .2, 'counts': 59},
'.0005': {'acc': .2, 'counts': 10}},
'20000': {'1': {'acc': 1.06, 'counts': 3700}, '.1': {'acc': 1.06, 'counts': 374},
'.005': {'acc': 1.06, 'counts': 42}, '.0005': {'acc': 1.06, 'counts': 8}}
}
# AC DC coupled Voltage Spec 90 day spec
acdcv_lo_acc = {'20': {'1': {'acc': 1.36, 'counts': 3600}, '.1': {'acc': 1.36, 'counts': 364},
'.005': {'acc': 1.36, 'counts': 41}, '.0005': {'acc': 1.36, 'counts': 8}},
'45': {'1': {'acc': .17, 'counts': 3600}, '.1': {'acc': .17, 'counts': 364},
'.005': {'acc': .17, 'counts': 41}, '.0005': {'acc': .17, 'counts': 8}},
'100': {'1': {'acc': .17, 'counts': 3600}, '.1': {'acc': .17, 'counts': 364},
'.005': {'acc': .17, 'counts': 41}, '.0005': {'acc': .17, 'counts': 8}},
'400': {'1': {'acc': .44, 'counts': 3600}, '.1': {'acc': .44, 'counts': 2810},
'.005': {'acc': .44, 'counts': 285}, '.0005': {'acc': .44, 'counts': 33}},
'20000': {'1': {'acc': .66, 'counts': 4620}, '.1': {'acc': .66, 'counts': 466},
'.005': {'acc': .66, 'counts': 51}, '.0005': {'acc': .66, 'counts': 9}},
'100000': {'1': {'acc': 3.16, 'counts': 11400}, '.1': {'acc': 3.16, 'counts': 1144},
'.005': {'acc': 3.16, 'counts': 119}, '.0005': {'acc': 3.16, 'counts': 16}},
'300000': {'1': {'acc': 10.16, 'counts': 69600}, '.1': {'acc': 10.16, 'counts': 6960},
'.005': {'acc': 10.16, 'counts': 701}, '.0005': {'acc': 10.16, 'counts': 74}}
}
acdcv_hi_acc = {'20': {'1': {'acc': 1.36, 'counts': 3600}, '.1': {'acc': 1.36, 'counts': 364},
'.005': {'acc': 1.36, 'counts': 41}, '.0005': {'acc': 1.36, 'counts': 8}},
'45': {'1': {'acc': .23, 'counts': 3600}, '.1': {'acc': .23, 'counts': 364},
'.005': {'acc': .23, 'counts': 41}, '.0005': {'acc': .23, 'counts': 8}},
'100': {'1': {'acc': .23, 'counts': 3600}, '.1': {'acc': .23, 'counts': 364},
'.005': {'acc': .23, 'counts': 41}, '.0005': {'acc': .23, 'counts': 8}},
'400': {'1': {'acc': .5, 'counts': 3600}, '.1': {'acc': .5, 'counts': 2810},
'.005': {'acc': .5, 'counts': 285}, '.0005': {'acc': .5, 'counts': 33}},
'20000': {'1': {'acc': 1.16, 'counts': 6420}, '.1': {'acc': 1.16, 'counts': 650},
'.005': {'acc': 1.16, 'counts': 69}, '.0005': {'acc': 1.16, 'counts': 11}}
}
# AC Current Spec 90 day spec
aci_res = {'30ma': {'6.5': 10e-9, '5.5': 100e-9, '4.5': 1e-6, '3.5': 10e-6},
'300ma': {'6.5': 100e-9, '5.5': 1e-6, '4.5': 10e-6, '3.5': 100e-6},
'1a': {'6.5': 1e-6, '5.5': 10e-6, '4.5': 100e-6, '3.5': 1e-3}}
aci_lo_acc = {
'20': {'1': {'acc': .85, 'counts': 2800}, '.1': {'acc': .85, 'counts': 290},
'.005': {'acc': .85, 'counts': 32},
'.0005': {'acc': .85, 'counts': 7}},
'45': {'1': {'acc': .3, 'counts': 2800}, '.1': {'acc': .3, 'counts': 290},
'.005': {'acc': .3, 'counts': 32},
'.0005': {'acc': .3, 'counts': 7}},
'100': {'1': {'acc': .25, 'counts': 2800}, '.1': {'acc': .25, 'counts': 290},
'.005': {'acc': .25, 'counts': 32}, '.0005': {'acc': .25, 'counts': 7}},
'400': {'1': {'acc': .25, 'counts': 2800}, '.1': {'acc': .25, 'counts': 750},
'.005': {'acc': .25, 'counts': 80}, '.0005': {'acc': .25, 'counts': 12}},
'20000': {'1': {'acc': 1, 'counts': 4000}, '.1': {'acc': 1, 'counts': 400},
'.005': {'acc': 1, 'counts': 42},
'.0005': {'acc': 1, 'counts': 8}}}
aci_hi_acc = {
'20': {'1': {'acc': .95, 'counts': 2800}, '.1': {'acc': .95, 'counts': 290},
'.005': {'acc': .95, 'counts': 32},
'.0005': {'acc': .95, 'counts': 7}},
'45': {'1': {'acc': .4, 'counts': 2800}, '.1': {'acc': .4, 'counts': 290},
'.005': {'acc': .4, 'counts': 32},
'.0005': {'acc': .4, 'counts': 7}},
'100': {'1': {'acc': .35, 'counts': 2800}, '.1': {'acc': .35, 'counts': 290},
'.005': {'acc': .35, 'counts': 32}, '.0005': {'acc': .35, 'counts': 7}},
'400': {'1': {'acc': .35, 'counts': 2800}, '.1': {'acc': .35, 'counts': 750},
'.005': {'acc': .35, 'counts': 80}, '.0005': {'acc': .35, 'counts': 12}}}
# AC DC coupled Current Spec 90 day spec
acdci_lo_acc = {'20': {'1': {'acc': 1.55, 'counts': 16000}, '.1': {'acc': 1.55, 'counts': 1600},
'.005': {'acc': 1.55, 'counts': 165}, '.0005': {'acc': 1.55, 'counts': 20}},
'45': {'1': {'acc': .4, 'counts': 16000}, '.1': {'acc': .4, 'counts': 1600},
'.005': {'acc': .4, 'counts': 165}, '.0005': {'acc': .4, 'counts': 20}},
'100': {'1': {'acc': .3, 'counts': 16000}, '.1': {'acc': .3, 'counts': 1600},
'.005': {'acc': .3, 'counts': 165}, '.0005': {'acc': .3, 'counts': 20}},
'400': {'1': {'acc': .65, 'counts': 16000}, '.1': {'acc': .65, 'counts': 3750},
'.005': {'acc': .65, 'counts': 375}, '.0005': {'acc': .65, 'counts': 42}},
'20000': {'.95': {'acc': .95, 'counts': 17500}, '..95': {'acc': .95, 'counts': 1750},
'.005': {'acc': .95, 'counts': 180}, '.0005': {'acc': .95, 'counts': 22}}}
acdci_hi_acc = {'20': {'1': {'acc': 1.65, 'counts': 16000}, '.1': {'acc': 1.65, 'counts': 1600},
'.005': {'acc': 1.65, 'counts': 165}, '.0005': {'acc': 1.65, 'counts': 20}},
'45': {'1': {'acc': .5, 'counts': 16000}, '.1': {'acc': .5, 'counts': 1600},
'.005': {'acc': .5, 'counts': 165}, '.0005': {'acc': .5, 'counts': 20}},
'100': {'1': {'acc': .4, 'counts': 16000}, '.1': {'acc': .4, 'counts': 1600},
'.005': {'acc': .4, 'counts': 165}, '.0005': {'acc': .4, 'counts': 20}},
'400': {'1': {'acc': .75, 'counts': 16000}, '.1': {'acc': .75, 'counts': 3750},
'.005': {'acc': .75, 'counts': 375}, '.0005': {'acc': .75, 'counts': 42}}}
# Frequency Spec
freq_acc = {'10': .05, '400': .01}
if unit == "dcv":
if value < 30.3e-3:
dmm_range = '30mv'
elif value < 303e-3:
dmm_range = '300mv'
elif value < 3.03:
dmm_range = '3v'
elif value < 30.3:
dmm_range = '30v'
elif value < 303:
dmm_range = '300v'
return (value * dcv_acc[dmm_range][plc]['acc']) + (dcv_res[dmm_range][digit] * dcv_acc[dmm_range][plc]['counts'])
elif unit == "dci":
if value < 303e-6:
dmm_range = '300ua'
elif value < 3.03e-3:
dmm_range = '3ma'
elif value < 30.3e-3:
dmm_range = '30ma'
elif value < 303e-3:
dmm_range = '300ma'
else:
dmm_range = '1a'
return (value * dci_acc[dmm_range][plc]['acc']) + dci_res[dmm_range][digit] * dci_acc[dmm_range][plc]['counts']
elif unit == "ohms2":
if value < 30.3:
dmm_range = '30'
elif value < 303:
dmm_range = '300'
elif value < 3.03e3:
dmm_range = '3k'
elif value < 30.3e3:
dmm_range = '30k'
elif value < 303e3:
dmm_range = '300k'
elif value < 3.03e6:
dmm_range = '3m'
elif value < 30.3e6:
dmm_range = '30m'
elif value < 303e6:
dmm_range = '300m'
elif value < 3.03e12:
dmm_range = '3g'
return (value * ohms2_acc[dmm_range][plc]['acc']) + ohms_res[dmm_range][digit] * ohms2_acc[dmm_range][plc]['counts']
elif unit == "ohms4":
if value < 30.3:
dmm_range = '30'
elif value < 303:
dmm_range = '300'
elif value < 3.03e3:
dmm_range = '3k'
elif value < 30.3e3:
dmm_range = '30k'
elif value < 303e3:
dmm_range = '300k'
elif value < 3.03e6:
dmm_range = '3m'
elif value < 30.3e6:
dmm_range = '30m'
elif value < 303e6:
dmm_range = '300m'
elif value < 3.03e12:
dmm_range = '3g'
return (value * ohms4_acc[dmm_range][plc]['acc']) + ohms_res[dmm_range][digit] * ohms4_acc[dmm_range][plc]['counts']
elif unit == "acv":
if float(plc) > 1:
plc = '1'
freq = 60 # needs to be fixed
if freq < 45:
freq = '20'
elif freq < 100:
freq = '45'
elif freq < 400:
freq = '100'
elif freq < 20000:
freq = '400'
elif freq < 100000:
freq = '20000'
elif freq < 1000000:
freq = '300000'
if value < 32.5e-3:
dmm_range = '30mv'
elif value < 325e-3:
dmm_range = '300mv'
elif value < 3.25:
dmm_range = '3v'
elif value < 32.5:
dmm_range = '30v'
elif value < 303:
dmm_range = '300v'
if value > 32.5:
acvAcc = acv_hi_acc
else:
acvAcc = acv_lo_acc
return (value * acvAcc[freq][plc]['acc']) + acv_res[dmm_range][digit] * acvAcc[freq][plc]['counts']
elif unit == "acdcv":
if float(plc) > 1:
plc = '1'
freq = 60 # needs to be fixed
if freq < 45:
freq = '20'
elif freq < 100:
freq = '45'
elif freq < 400:
freq = '100'
elif freq < 20000:
freq = '400'
elif freq < 100000:
freq = '20000'
elif freq < 1000000:
freq = '300000'
if value < 32.5e-3:
dmm_range = '30mv'
elif value < 325e-3:
dmm_range = '300mv'
elif value < 3.25:
dmm_range = '3v'
elif value < 32.5:
dmm_range = '30v'
elif value < 303:
dmm_range = '300v'
if value > 32.5:
acdcv_acc = acdcv_hi_acc
else:
acdcv_acc = acdcv_lo_acc
return (value * acdcv_acc[freq][plc]['acc']) + acv_res[dmm_range][digit] * acdcv_acc[freq][plc]['counts']
elif unit == "aci":
if float(plc) > 1:
plc = '1'
freq = 60 # needs to be fixed
if freq < 45:
freq = '20'
elif freq < 100:
freq = '45'
elif freq < 400:
freq = '100'
elif freq < 20000:
freq = '400'
elif freq < 100000:
freq = '20000'
if value < 30.3e-3:
dmm_range = '30ma'
elif value < 303e-3:
dmm_range = '300ma'
if value > 303e-3:
dmm_range = '1a'
aci_acc = aci_hi_acc
else:
aci_acc = aci_lo_acc
return (value * aci_acc[freq][plc]['acc']) + aci_res[dmm_range][digit] * aci_acc[freq][plc]['counts']
elif unit == "acdci":
if float(plc) > 1:
plc = '1'
freq = 60 # needs to be fixed
if freq < 45:
freq = '20'
elif freq < 100:
freq = '45'
elif freq < 400:
freq = '100'
elif freq < 20000:
freq = '400'
elif freq < 100000:
freq = '20000'
if value < 30.3e-3:
dmm_range = '30ma'
elif value < 303e-3:
dmm_range = '300ma'
if value > 303e-3:
dmm_range = '1a'
acdci_acc = acdci_hi_acc
else:
acdci_acc = acdci_lo_acc
return (value * acdci_acc[freq][plc]['acc']) + aci_res[dmm_range][digit] * acdci_acc[freq][plc]['counts']
elif unit == "freq":
if value < 400:
dmm_range = '10'
else:
dmm_range = '400'
return value * freq_acc[dmm_range]
elif unit == "per":
freq = self.get_frequency()
if freq < 400:
dmm_range = '10'
else:
dmm_range = '400'
return value * freq_acc[dmm_range]
def get_frequency(self):
self.set_measure("freq")
freq = self.measure()
self.set_measure(self.unit)
return freq
def read(self):
self.ser.write(b'++read\r\n')
val = self.readline()
return val.rstrip('\r\n')
def measure(self):
if float(self.get_digits()) > 6.5:
value = self.read()
self.ser.write(b'RMATH HIRES\r\n')
time.sleep(.007)
self.ser.write(b'++read\r\n')
hire = self.readline().rstrip('\r\n')
try:
float(value)
float(hire)
if abs(float(hire)) == 0:
return float(value) + float(hire)
elif abs(float(value)) / abs(float(hire)) > 1e6:
return float(value) + float(hire)
else:
time.sleep(.1)
return float(value)
except ValueError:
return self.measure()
else:
value = self.read()
try:
float(value)
return float(value)
except ValueError:
return self.measure()
def get_plc(self):
if self.gotPlc:
return self.plc
else:
self.ser.write(b'NPLC?\r\n')
self.plc = self.readline().rstrip('\r\n')[1:]
try:
self.plc = float(self.plc)
self.gotPlc = True
return self.plc
except ValueError:
time.sleep(.1)
return self.get_plc()
def get_digits(self):
self.digits = self.get_plc()
if float(self.digits) <= .0005:
self.digits = '3.5'
elif float(self.digits) <= .005:
self.digits = '4.5'
elif float(self.digits) <= .1:
self.digits = '5.5'
elif float(self.digits) <= 1:
self.digits = '6.5'
elif float(self.digits) <= 10:
self.digits = '7.5'
elif float(self.digits) <= 100:
self.digits = '7.5'
return self.digits
def set_measure(self, units):
self.unit = units
if self.unit == "dcv":
self.ser.write(b'F10\r\n')
elif self.unit == "dci":
self.ser.write(b'DCI\r\n')
elif self.unit == "ohms2":
self.ser.write(b'F40\r\n')
elif self.unit == "ohms4":
self.ser.write(b'F50\r\n')
elif self.unit == "acv":
self.ser.write(b'ACV\r\n')
elif self.unit == "acdcv":
self.ser.write(b'ACDCV\r\n')
elif self.unit == "aci":
self.ser.write(b'ACI\r\n')
elif self.unit == "acdci":
self.ser.write(b'ACDCI\r\n')
elif self.unit == "freq":
self.ser.write(b'FREQ\r\n')
elif self.unit == "per":
self.ser.write(b'PER\r\n')
time.sleep(.2)
def set_plc(self, plc):
try:
float(plc)
if not (float(plc) == float(100) or float(plc) == float(10) or float(plc) == float(1) or float(
plc) == float(.1) or float(plc) == float(.005) or float(plc) == float(.0005)):
print("PLC incorrect!")
return
except ValueError:
print("PLC incorrect!")
return
if float(plc) == float(100):
plc = 100
elif float(plc) == float(10):
plc = 10
elif float(plc) == float(1):
plc = 1
elif float(plc) == float(.005):
plc = .005
elif float(plc) == float(.0005):
plc = .0005
self.plc = plc
nplc = "NPLC " + str(plc) + "\r\n"
self.ser.write(nplc.encode())
time.sleep(1)
def set_terminals(self, term):
if term == "Rear":
self.ser.write(b"TERM 2\r\n")
else:
self.ser.write(b"TERM 1\r\n")
time.sleep(.5)