def doUnitConversions(self):
        """WF3 IR data come out in electrons, and I imagine  the
         photometry keywords will be calculated as such, so no image
         manipulation needs be done between native and electrons """
         # Image information
        _handle = fileutil.openImage(self._filename, mode='readonly', memmap=False)

        for chip in self.returnAllChips(extname=self.scienceExt):
            conversionFactor = 1.0
            if '/S' in chip._bunit:
                conversionFactor = chip._exptime
            else:
                print("Input %s[%s,%d] already in units of ELECTRONS"
                      %(self._filename,self.scienceExt,chip._chip))

            chip._effGain = 1.0# chip._gain #1.
            chip._conversionFactor = conversionFactor #1.

        _handle.close()
        self._effGain= 1.0
WF3 IR data come out in electrons, and I imagine  the
         photometry keywords will be calculated as such, so no image
         manipulation needs be done between native and electrons