Dwyer Mark II - Manual

Mark II Series Molded Plastic Manometers
Specifications - Installation and Operating Instructions
Bulletin D-58
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000 www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: [email protected]
Dwyer Mark II Manometers come in a variety of ranges. Make
sure the fluid being used is for the correct manometer.
Mark II #25, 27, MM-80 and M-700 Pa use red gage fluid
(specific gravity 0.826).
Mark II #26, 28 and MM180 use blue gage fluid (specific gravity
1.9).
If additional fluid is required, call, fax or email the Dwyer office
listed at bottom of page.
INSTALLATION
Position manometer on a vertical surface. Drill two 1/8˝ or 9/64˝
holes on a vertical line 3-15/16˝ apart. Loosely mount
manometer with self-tapping screws provided. Adjust gage until
level bubble is centered in level vial, then secure the manometer
tightly.
For portable use, order optional A-612 Portable Stand.
FILLING
Turn the zero set knob counterclockwise until it stops, then turn
clockwise 3 full turns. This puts zero in approximately the middle
of the travel adjustment in either direction. Remove the fill plug
and fill with gage fluid until fluid reaches zero on scale. Minor
adjustments can be made to adjust zero by adjusting zero knob.
Replace fill plug. If gage is overfilled, remove excess by inserting
pipe cleaner through the fill port to blot up excess fluid.
Mark II Model No. 25 inclined-vertical manometer,
(shown with optional A-612 portable stand)
MAINTENANCE
Check fluid level regularly and adjust zero with zero adjust knob.
Be sure tubing connections are disconnected and gage is open
to atmosphere before adjusting zero.
Clean with mild soap and water. Avoid any cleaning fluids which
may result in damaging the gage.
ACCESSORIES
Each Mark II manometer includes two tubing connectors for 1/8˝
pipe or sheet metal ducts, two mounting screws, 1 oz. bottle of
indicating fluid, red and green pointer flags, 8´ of double column
tubing and instructions.
1-7/16
[35.53]
1-1/4
[31.75]
1-1/8
[28.58]
2-1/4
[57.15] MAX
Ø7/32 [5.56] HOLE
5-29/32
[150.02]
4-23/32
[119.86]
3-11/16
[93.66]
5/8
[15.88]
7-13/32 [188.12]
25/32 [19.84]
4-25/32
[121.44]
25/32
[19.84]
7/32 X 13/32
[5.56 X 10.32]
MOUNTING SLOT
SPECIFICATIONS
Accuracy: ±3% FS.
Temperature Limits: 140°F (60°C).
Pressure Limits: 10 psi (70 kPa).
Weight: 1.04 lb (472 g).
Model
Mark II 25
Mark II 26
Mark II 27*
Mark II MM-80
Mark II M-700PA Range
0-3 in w.c
0-7 in w.c.
0-7000 fpm
0-80 mm w.c.
10-0-700 Pa Fluid Used
Red fluid, .826 s.g.
Blue oil, 1.91 s.g.
Red fluid, .826 s.g.
Red fluid, .826 s.g.
Red fluid, .826 s.g.