Minor changes

Source/Program/Threads/PowerSupplyUpdateThread.cs

@@ -131,7 +131,6 @@ namespace ProgramLib
 
             EventGroup<Events, EventWaitHandle> eventGroup = new EventGroup<Events, EventWaitHandle>(eventDict);
 
-            Random rnd = new Random();
             while (true)
             {
                Events id = eventGroup.WaitAny(pollRateMs);
@@ -140,7 +139,7 @@ namespace ProgramLib
                {
                   PowerSupplyData data = Program.Instance()._powerSupplySharedData.GetData(PowerSupplyConstants.POWER_DEVICE.STE_PVM_5V.ToString());
 
-                  if (data._initialized)
+                  if (data != null && data._initialized)
                   {
                      _powerModuleToPowerDataModelDict["UUT_P20V"].ActualVoltage = data._voltage.ToString("0.00");
                      _powerModuleToPowerDataModelDict["UUT_P20V"].ExpectedVoltage = data._powerSupplyModuleInfo.voltageSetpoint_.ToString("0.00");