Dwyer 1212 - Manual (Page 2)

FILLING
Using 1 quart distilled water, add 1 oz bottle of A-
126 Fluorescein green color concentrate.
Remove a tubing connector from the manometer
and pour fluid in to mid-point level. Shake to
remove air bubbles and slide scale so zero mark
is in line with the meniscus of the two fluid
columns.
For readings in inches of mercury, fill with 13.6
sp. gr. triple distilled mercury. When used with
mercury, some discoloration of the vinyl tubing
will normally occur.
READING
Connect the manometer to the source of
pressure, vacuum or differential pressure. When
the pressure is imposed add the number of
inches one column travels up to the amount the
other column travels down to obtain the pressure
reading. If the reading is desired in other units
the conversion chart may be used.
Should one column travel further than the other
column, due to minor variations in the tube I.D. or
to pressure imposed, the accuracy of the
pressure reading thus obtained is not impaired.
The U-tube manometer is a primary measuring
device indicating pressure by the difference in
the height of two columns of fluid. The fact that
one column travels further than the other does
not affect the accuracy of the reading.
CLEANING
Cleaning can best be accomplished with a little
pure soap and water. Avoid liquid soaps and
solvents. Flush thoroughly with clear water to
remove all soap. Dry completely before refilling
with mercury.
OPERATING RANGES
Model
1211-8
1211-12
1211-16
1211-24
1211-30
1211-36
1211-48
1211-60
1211-72
1211-120
Metric
1211-50
1211-100
1211-200 Range, In.
4-0-4
6-0-6
8-0-8
12-0-12
15-0-15
18-0-18
24-0-24
30-0-30
36-0-36
60-0-60
Range,CM
25-0-25
50-0-50
100-0-100 Hg Req’d (oz.)
6
7
9
12-1/2
15
17-1/2
22-1/2
27
32
57
Hg Req'd (oz.)
11
18-
1
⁄2
35
Slack Tube ® Manometer extended
with cross-sectional view of molded
unbreakable Acrylic plastic top,
connectors and over pressure traps.