2.3Reverse Acting Calibration
2.3.1When calibrated to operate in the reverse acting mode the minimum input signal produces the maximum output pressure and increasing the input signal results in decreasing the output pressure. Setting the unit to operate in the reverse acting mode is accomplished by positioning internal electrical switches.
CAUTION Do not reverse the input leads.
2.3.2Disconnect input signal and supply pressure. Take off the top cover by removing the four screws.
CAUTION Avoid touching circuit board. Shorting possible.
2.3.3Position switches as illustrated in figure 8. Replace cover.
2.3.4Set the input signal to the minimum valve being used. Turn the zero screw to set the maximum output pressure.
2.3.5Set the span by applying the maximum input signal. Turn the span screw to set the minimum output pressure.
2.3.6It may be necessary to repeat steps 2.3.4 – 2.3.5 until both end points are at desired values.
Figure 8 - Position of switches for Reverse Acting Operation
Note: Switches not shown match Direct Acting Settings (see figure 7).
2.4Split Range
2.4.1When calibrated to operate in the split range mode, a full input signal (i.e.
2.4.2Disconnect input signal and supply pressure. Take off the top cover of the unit by removing the four screws.
CAUTION Avoid touching circuit board. Shorting possible.
2.4.3Position switches as illustrated in figure 9. Replace cover
2.4.4After setting switches, refer to the appropriate calibration procedure (Direct Acting or Reverse Acting) to get to desired output range (i.e.
Figure 9 - Position of switches for Split Range Operation
Note: Switches not shown match Direct Acting Settings (see figure 7).
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