Dwyer 300 - Manual

1. Mount panel securely on a vertical surface, avoiding excessive heat.
(Temperatures over 135ºF. will damage the gage.)
2. Vent gage to atmosphere.
3. With an inclined manometer, release level adjustment screw, center
bubble between cross hairs on spirit level and tighten level screw
securely.
4. Slide scale to zero mark lies directly behind fluid meniscus, as shown
below.
Align fluid meniscus and the reflected image to eliminate parallax error.
5. Add or remove fluid as necessary.
6. Run connection provided to left side of gage or plus (above
atmospheric) pressures. Connect to right side for minus (below
atmospheric) pressures. Connect to both sides for differential
pressures, as with a Pitot tube.
CAUTION:
Use only Dwyer ® gage fluid. Clean with mild soap and water only. Other
fluids, solvents or cleaning agents may damage the gage.
AIR VELOCITY
The total pressure of an air stream flowing in a duct is the sum of the static
or bursting pressure exerted upon the sidewalls of the duct and the impact
or velocity pressure of the moving air. Through the use of a Pitot tube
connected differentially to a manometer, the velocity pressure alone is
indicated and the corresponding air velocity determined.
Inclined and Vertical Stationary Manometers
Operating Instructions and Parts List
Bulletin D-3
DWYER INSTRUMENTS INC.
MICHIGAN CITY, IN 46360 U.S.A.
(-1) Panel
(-2) Gage Body
(-3) Scale
(-4) Scale Screw and Washer
(-5) Leveling Screw, Nut and
Washer
(-6) Mounting Screw and Washer
(-7) Molded Nylon Connector –
Rapid shut off type
(-8) 1 oz. bottle Red Gage Fluid
(not shown)
Parts list. Contact factory for ordering information.