Powers 900X I/P Flowrite II Pressure Regulators User Manual

Page 3

Output:
Connect output to 1/4 NPT port marked "OUT" on base of unit.

The two unmarked 1/4 NPT ports may be used as alternate out-

put ports or for a gauge to measure output pressure. Unused

ports must be plugged.

Electrical Connections:
Connect electrical signal to leads exiting side of unit through 1/2

NPT conduit fitting. For direct acting (where increasing signal

increases output pressure), connect positive signal to black

lead and negative to white. For reverse acting (increasing signal

decreases output pressure), connect positive signal to white

lead and negative to black.

4. Set signal to high end of the signal scale. (For reverse acting,

set to low end of the signal scale).

5. Adjust "SPAN" screw until output pressure is set to the high

end of the output scale.

6. Repeat steps 2, 3, 4, and 5 until no further readjustment is

necessary.

7. Replace protective caps.

Transducer should be calibrated after mounting. If transducer is

calibrated in an upright position, then mounted at an angle, read-

justment of the "ZERO" is necessary.
1. Remove plastic cap from "ZERO" and "SPAN" adjustment

screw access holes.

2. Set signal to low end of the signal scale. (For reverse acting,

set to high end of the signal scale).

3. Adjust "ZERO" screw until output pressure is set to the low

end of the output scale. Turn counterclockwise to increase

pressure, clockwise to decrease pressure. If output pressure

does not change when screw is turned, turn screw counter-

clockwise until pressure starts to rise.

Calibration

Maintenance

Figure 2

If internal clogging occurs due to improper filtering of the supply

air, the orifice can be cleaned without removing the unit from

its mounting or plumbing. Turn off the supply air. Unscrew and

remove the orifice assembly. Clean the orifice through the side

of the orifice assembly using a wire that has a smaller diameter

than 0.015 in. (0.38 mm). Shake out any loose particles inside of

the orifice assembly. Screw orifice assembly back into unit.