frappy_psi.furnace: special classes PTXgauge and PRtransmitter

move some initialization from cfg file to source code
+ make 'out of calibrated range' and 'sensor break' more generic

Change-Id: I3e92100fdb9c983f82665de9d8e063609cd7af5a

frappy_psi/furnace.py

@@ -25,6 +25,7 @@ from frappy.core import Module, Writable, Attached, Parameter, FloatRange, Reada
 from frappy.mixins import HasControlledBy
 from frappy_psi.picontrol import PImixin
 from frappy_psi.convergence import HasConvergence
+from frappy_psi.ionopimax import CurrentInput, LogVoltageInput
 import frappy_psi.tdkpower as tdkpower
 import frappy_psi.bkpower as bkpower
 
@@ -99,3 +100,14 @@ class TdkOutput(HasControlledBy, tdkpower.Output):
 
 class BkOutput(HasControlledBy, bkpower.Output):
     pass
+
+
+class PRtransmitter(CurrentInput):
+    rawrange = (0.004, 0.02)
+    extendedrange = (0.0036, 0.021)
+
+
+class PKRgauge(LogVoltageInput):
+    rawrange = (1.82, 8.6)
+    valuerange = (5e-9, 1000)
+    extendedrange = (0.5, 9.5)