diff options
Diffstat (limited to 'qolab')
| -rw-r--r-- | qolab/hardware/power_supply/keysight_e3612a.py | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/qolab/hardware/power_supply/keysight_e3612a.py b/qolab/hardware/power_supply/keysight_e3612a.py index 6793088..cb0b5de 100644 --- a/qolab/hardware/power_supply/keysight_e3612a.py +++ b/qolab/hardware/power_supply/keysight_e3612a.py @@ -11,6 +11,7 @@ class KeysightE3612A(PowerSupplySCPI): self.numberOfChannels = 3 self.deviceProperties = {'OpMode', }; self.channelProperties = {'IsOn', 'Regulation', 'Vout', 'Vlimit', 'Iout', 'Ilimit', 'dV', 'dI', } + self.deffaultChannelR = 47; # used if no empirical way to calculate it via Vout/Iout def getChandV(self, chNum): """ @@ -141,7 +142,10 @@ class KeysightE3612A(PowerSupplySCPI): Vo = vLimit - vOut else: Vo=0 - R=vOut/iOut + if (iOut == 0) or (vOut <= 0.001): # when vOut set to 0 the numbers are misreported + R = self.deffaultChannelR # some default + else: + R=vOut/iOut vDesired = R*iDesired self.setChanVlimit(chNum, vDesired+Vo) time.sleep(dwellTime) |