diff options
Diffstat (limited to 'qolab/hardware/power_supply')
| -rw-r--r-- | qolab/hardware/power_supply/keysight_e3612a.py | 26 |
1 files changed, 14 insertions, 12 deletions
diff --git a/qolab/hardware/power_supply/keysight_e3612a.py b/qolab/hardware/power_supply/keysight_e3612a.py index 76d568e..8000c56 100644 --- a/qolab/hardware/power_supply/keysight_e3612a.py +++ b/qolab/hardware/power_supply/keysight_e3612a.py @@ -26,8 +26,8 @@ class KeysightE3612A(PowerSupplySCPI): # used if no empirical way to calculate it via Vout/Iout def getChandV(self, chNum): - """ - Voltage precision per channel. + """Get voltage precision per channel. + Obtained from data sheet. Alternative estimate is by assuming 14 bit precision from the maximum reading. """ @@ -36,8 +36,8 @@ class KeysightE3612A(PowerSupplySCPI): return 1.5e-3 def getChandI(self, chNum): - """ - Current precision per channel. + """Current precision per channel. + Obtained from data sheet. Alternative estimate is by assuming 14 bit precision from the maximum reading. """ @@ -46,8 +46,8 @@ class KeysightE3612A(PowerSupplySCPI): return 0.160e-3 # see specification for high current > 20mA def getOpMode(self): - """ - Queries power supply operation mode, returns OFF|PAR|SER|TRAC + """ Queries power supply operation mode, returns OFF|PAR|SER|TRAC. + OFF stands for independent channels """ qstr = "OUTP:PAIR?" @@ -120,17 +120,19 @@ class KeysightE3612A(PowerSupplySCPI): return float(rstr) def setChanIout_mA(self, chNum, val, **kwds): - """ - Set current in mA. - Calls setChanIout with val converted from mA to A + """Set current in mA. + + Calls setChanIout with val converted from mA to A. """ return self.setChanIout(chNum, val / 1000.0, **kwds) @BasicInstrument.tsdb_append def setChanIout(self, chNum, val, currentHeadRoom=1e-3, dwellTime=0.3): - """ - Tuning Vout to achieve desired Iout. - Generally setting current limit will maintain current near but not exact to desired. + """Set current in the channel. + + We will tune Vout to achieve desired Iout. + Generally setting current limit will maintain current near + but not exact to desired value. Since Vlimit can be set with good precision, this function will try tune Vlimit until the Idesired is reached. """ |