TB 9-6685-330-35
Figure 3. High pressure check - equipment setup.
a. Performance Check
NOTE
It is possible that the TI has been in storage prior to
installation. Prior to actual operation of the TI, it is advised
that the TI be exercised to ensure correct indication. To
exercise the unit, sequentially apply maximum and minimum
differential pressure to the high side of the TI for at least 10
cycles.
(1) Zero the TI at atmospheric pressure and connect PNEUMATIC PRESSURE
(2) The LOW PRESSURE SIDE (fig.3) of the TI is vented to the atmosphere.
(3) Adjust WATER PUMP NITROGEN REGULATOR (fig. 3) fully ccw.
(4) Carefully open NITROGEN TANK VALVE (fig. 3).
(5) Adjust WATER PUMP NITROGEN REGULATOR (fig. 3) to apply 25, 50, 75,
100, and 110 PERCENT OF FULL SCALE pressure to the high side of TI.
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