EF-Series Instruction Manual
Rev 2/01 4-7
CAUTION
To protect the differential cell of the Flow Sensor, do not close the by-pass valve on
the valve manifold until after process pressure has been reapplied. This will keep
one side of the differential sensor from being subjected to high pressure while the
other side has no pressure applied. Refer to Figure 4-2.
1a
Close
LH
3
Open
LH
4
Close
LH
start2
LH
Pre-Startup
1b
Close
2
Open
Startup Sequence
Figure 4-2. Returning the Sensor to Service
NOTE
If you calibrated the Differential Pressure input, refer to Section 4.6.3, Zero Shift,
before completing the last step.
17.
Finally, select the OK (or Done) pushbutton to cause the calibration window to close,
freeze values to be canceled (unfrozen), and live readings to resume being used for the flow
calculations. All calibration settings that were changed are automatically recorded into the
Event Log of the flow computer.
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