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Home ⊙ other ⊙ QB1T & QB2T proportion INSTALLATION & MAINTENANCE INSTRUCTIONS

QB1T & QB2T proportion INSTALLATION & MAINTENANCE INSTRUCTIONS

From: | Author:kongjiang | Time :2025-06-16 | 60 Browse: | Share:

QB2 VALVES This section assumes there is a properly scaled and calibrated   transducer for use as 2nd loop feedback signal.  For information on re-calibrating Proportion-Air DS series pressure transducers see sheet BR060.

  1. Follow, in order, steps 1-5 as noted in the section titled QB1 VALVES .

  2.  Make correct electrical connections as noted.   Make sure there is a proper meter in place to measure the command input to the QB2.   Make sure  the 2nd loop signal is connected.

  3.  Set the electrical command input to MAXIMUM value.

  4.  Adjust the SPAN pot until MAXIMUM desired pressure is reached (clockwise increases pressure).

  5.  Set the electrical command input to MINIMUM value.

  6.  Adjust the ZERO pot until MINIMUM desired pressure is reached (clockwise increases pressure).

  7.  Repeat ZERO and SPAN adjustments, which interact slightly, until QB2 valve is calibrated back to proper range.  Steps 3 - 6.

  8.   Replace calibration access cap.

proportion-AIR  QB1TFIE140

PROPORTION-AIR QB1TFIC100

PROPORTION-AIR QB1XANEXZP80PSG

PROPORTION-AIR QB2TFEE235





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