diff options
Diffstat (limited to 'qolab/hardware/power_supply')
| -rw-r--r-- | qolab/hardware/power_supply/keysight_e3612a.py | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/qolab/hardware/power_supply/keysight_e3612a.py b/qolab/hardware/power_supply/keysight_e3612a.py index 8000c56..69f6f4a 100644 --- a/qolab/hardware/power_supply/keysight_e3612a.py +++ b/qolab/hardware/power_supply/keysight_e3612a.py @@ -138,14 +138,17 @@ class KeysightE3612A(PowerSupplySCPI): """ iDesired = val # self.setChanIlimit(chNum, val+currentHeadRoom) - # Here, we assume that hook up is already made, so we can estimate source resistance + # Here, we assume that hook up is already made, + # so we can estimate source resistance. # So the protocol is the following: # find R -> calculate required Vout for the desired Idesired # -> set Vlimit to reach desired Vout and Iout - # In general, once we estimate resistance of the load + source, we do not need to - # anything extra. But there is a problem: for a given Vlimit setting, the actual Vout + # In general, once we estimate resistance of the load + source, + # we do not need to anything extra. + # But there is a problem: for a given Vlimit setting, the actual Vout # is slightly off. - # We will assume that Vlimit = R*Iout + Vo = Vout + Vo, i.e. linear approximation + # We will assume that Vlimit = R*Iout + Vo = Vout + Vo, + # i.e. linear approximation for i in range(10): iOut = self.getChanIout(chNum) if abs(iOut - iDesired) <= self.getChandI(chNum): |