Merge pull request #194 from thennen/fix_ps6000a_voltage_offset

VOffset converted to c_double instead of c_float

Author: hmaarrfk

picoscope/ps6000a.py

@@ -453,7 +453,7 @@ def _lowLevelSetChannel(self, chNum, enabled, coupling, VRange, VOffset,
         if enabled:
             m = self.lib.ps6000aSetChannelOn(c_int16(self.handle),
                                              c_enum(chNum), c_enum(coupling),
-                                             c_enum(VRange), c_float(VOffset),
+                                             c_enum(VRange), c_double(VOffset),
                                              c_enum(BWLimited))
         else:
             m = self.lib.ps6000aSetChannelOff(c_int16(self.handle),