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21 Washington AveScarborough, ME 04074
Type B Air Meter Operating Manual
Note: Please refer to ASTM C231 and AASHTO T152 for complete and
detailed test protocol. The following instruc-tions are intended as
a guide for general operation. Note: Type B air meters are not to
be used for concrete with lightweight or porous aggregate
1. Wet the meter bowl and fill the bowl in 3 equal layers. After
each layer is poured, use a tamping rod to tamp the concrete 25
times, penetrating 1” into the previous layer. After tamping, hit
the sides of the bucket 10-15 times with a standard 1lb rubber
mallet.2. Strike off with a metal strike off bar, clean the contact
sur-face and dampen the rubber gasket on the air meter lid. 3.
Clamp on cover securely and insure both petcocks are open, and that
the bleeder valve cap is tightened.4. Using the bulb syringe,
inject water through one petcock until all the air is expelled
(water ejected) through the opposite petcock. Do not tilt meter.
Leave the petcocks open.5. Using the built in pump, pump air into
the meter until the dial on the gauge hits the calibrated initial
pressure line.6. Tap the gauge or wait a few seconds for the gauge
hand to stabilize, then pump additional air or bleed off as
necessary using the bleeder valve cap.7. Close both petcocks, then
press down on the needle valve lever to release pressurized air
into the base. Tap the gauge, while holding the lever down for a
few seconds until the gauge dial stabilizes.8. Read the air content
on the gauge and subtract the aggre-gate correction factor (see
ASTM C231)9. Carefully open petcocks to release air pressure, then
re-move the lid. Immediately clean and flush the bucket, lid, and
petcock openings with clean water to keep your meter cleaner
longer.
Operating Instructions:
CA-0500
ACM-6
H-2786P
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21 Washington AveScarborough, ME 04074
Calibration Instructions:1. Fill the base with water (room
temperature).2. Thread the short piece of straight tubing into the
threaded petcock opening under the cover. Clamp the cover onto the
base with the tube extending down into the water.3. Using the
syringe, add water to the base through the threaded petcock until
all air is expelled through the opposite petcock.4. Pump air
pressure to beyond the initial pressure line and wait a few seconds
while the gauge hand stabilizes. Then add or release air as needed
until the gauge hand is stabilized at the initial pressure line.5.
Close both petcocks and quickly press the needle valvelever. Using
your finger, tap the gauge lightly while holding down the lever
until the gauge hand reads zero. (Follow specification protocol if
two or more tests show a variation greater than 0.1% from
zero).
6. Screw on the curved tube into the threaded petcock. Carefully
fill the calibration vessel full by pressing on the needle valve
lever and controlling the flow with the petcock lever. 7. Open the
free petcock to release air pressure. Allow water from the tube to
run back into the base by opening the other petcock (there should
be 5% air in the base).8. While both petcocks are open, follow the
procedure from step 4 to pressurize the meter to the initial
pressure line. Close the petcocks and quickly press the needle
valve lever. Stabilize the gauge hand. (The gauge should read
5.0%).9. If two or more tests indicate more than 0.1% variation,
reset the gauge pointer. Remove bezel ring, gauge lens, and gasket.
10. Once gauge hand reads 5.0%, additional tests can be run in
increments of 5% by withdrawing additional water with the
calibration vessel
Carrying Cases:
Gauge Options:
Air Meter Gauge with Rubber ProtectorACM-6-07A
Standard Air Meter GaugeACM-6-07
ACM-6-36
ACM-6-36ACM-6-32
ACM-6-32
ACM-6-34A
ACM-6-34A
ACM-6-31
RM-1
ACM-6-33
ACM-6-33
ACM-6-38PAM-0176
ACM-33AACM-33A
ACM-6-33
ACM-6-32
ACM-6-34A ACM-6-34A
ACM-6-36
CA-0500-30
H-2785.38HP
H-2783.31
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21 Washington AveScarborough, ME 04074
Parts Diagram:
Part# Description Qty.ACM-6-60 Ultra Pump 1
ACM-60-1 Top Knob 1
ACM-6-60-2 Steel Nut 1
ACM-6-60-3 Vinyl Shielding 1
ACM-6-60-4 Top Housing 1
ACM-6-60-5 Housing O-Ring 1
ACM-6-60-6 Pump Shaft 1
ACM-6-60-7 Internal Rod 1
ACM-6-60-8 Rod Shock O-Ring (Optional) 1
ACM-6-60-9 Plunger O-Ring 1
ACM-6-60-10 Plunger Spool 1
ACM-6-60-61 Check Valve with Gasket 1
ACM-6-60-PK Pump Repair Kit 1
Item # Part# Description Qty.
01 ACM-6-01 Pressure Chamber 1
02 ACM-6-02 Pressure Chamber Cap 1
03 ACM-6-03 45° Elbow 1
04 ACM-6-04 Chamber Gasket 2
05 ACM-6-05 Bleeder Valve Stem 1
06 ACM-6-06 Bleeder Cap & Gasket 1
07 ACM-6-07 Air Meter Gauge 1
11 ACM-6-11 Needle Valve Stem 1
12 ACM-6-12 Needle Valve Nut 1
13 ACM-6-13 Needle Valve Lever 1
14 ACM-6-14 Needle Valve Spacer 1
15 ACM-6-15 Needle Valve O-Ring 1
16 ACM-6-16 Needle Valve Spring 1
17 ACM-6-17 Spring Retainer Nut/Clip 1
18 ACM-6-18 Valve Seat Assembly 1
19 ACM-6-19 Air Meter Lid 1
20 ACM-6-20 Cover Lid O-Ring 1
21 ACM-6-21 Petcock-Ball Valve Type 2
22 ACM-6-22A ACM Style Clamp Assembly 4
29 ACM-6-29 Meter Base 1
