Humboldt H-4167 User Manual

11.09

product manual

H-4166 & H-4167

Voluvessel

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This unit has been calibrated and is ready for use as received.

After set-up, calibration is recommended.

Calibration Check:

Verify the procedure to be used and the accuracy of the volume indicator by using the
apparatus to measure containers or molds of determinable volume that dimensionally
simulate test holes that will be used in the field. The apparatus and procedure shall be
such that these volumes will be measured to within 1.0 percent. Containers of different
volumes shall be used so that calibration of the volume indicator covers the range of
anticipated test hole sizes.

Note: The H- 4141 four-inch mold and the H-4161 six-inch mold described in ASTM
D698 and D1557 test for moisture/density relations of soils or other molds prepared
to simulate actual test holes may be used. Where several sets of apparatus are
used, it may be desirable to cast duplicates of actual test holes. These sets should
represent the range of sizes and irregularities in the walls of the test holes that will
be encountered. These fabricated holes call be used as standards for the calibration
check of the Voluvessel. This can be accomplished by forming plaster of Paris
negatives in the test holes and using these forms as forms for Portland cement
concrete castings, after removing the plaster of Paris negative from the concrete
castings, the inside surface of the fabricated holes should be sealed watertight, and
their volume determined as indicated.

Method to obtain volume of container or mold to be used to
check the accuracy of the voluvessel:

Determine the mass of water, in grams, required to fill one of the containers. Slide a
glass plate carefully over the top of the surface of the container in such a manner as to
ensure the container is filled completely with water. Determine the temperature of the
water in the container. A thin film of cup grease smeared on the top surface of
the container will make a watertight joint between the glass plate and the top of the
container. Calculate the volume of the container in cubic feet (or cubic meters) by
multiplying the mass of the water, in grams used to fill the container by the unit
volume of water, in milliliters per gram, at the observed temperature taken from
Table 1, and dividing the result by 28317 ml/ft3 (or 1 x 10 (6) ml/m3. Repeat this
procedure until three values are secured for the volume of the container having a
maximum range of variation 0.0001 ft3 or (2.8 x10(-5) m3), Repeat this procedure for
each of the containers to be used in the calibration check.

Calibration check tests

Place the rubber-balloon apparatus on a relatively smooth horizontal surface.
Pressurize it to 5psi and then adjust the water level up or down until it's at
zero on the scale. Transfer the apparatus to one of the containers and take the
reading on the volume indicator when the rubber balloon completely fills the
container (Notes 1 & 2).
Apply pressure to the liquid in the apparatus until there is no change indicated,

on the volume indicator. Note and record the pressure. Depending upon
the type of apparatus, this pressure may be as high as 5 psi (34.5 kPA). It will
usually be necessary to add load (surcharge) to the apparatus to prevent it from
rising (Note 3). Note and record the total amount of load added. The difference
between the initial and the final readings of the volume indicator is the indicator
volume value for the container.

The membrane may be withdrawn from the container by applying a partial
vacuum to the liquid in the apparatus. Repeat the procedure for the other
containers.

Note 1:

If the calibration container or mold is airtight, it may be necessary to
provide an air escape, since the rubber membrane can entrap air within the
container and cause an erroneous volume measurement. After the volume of
the container has been determined with water and prior to the insertion of the
rubber balloon, small air escape holes may be provided by placing lengths of
small diamter string over the edge of the container and down inside the wall
slightly beyond the bottom center. This will permit air leakage during the filling
o the conter with the membrane. If such a procedure is necessay in the labora­tory, it may be necessary to use a similar procedure on tightly-bonded soil in
the field.

Note 2:

Before any measurements are made, it may be necessary to distend the
rubber balloon and remove air bubbles adhering to the inside of the membrane
by kneading.

Note 3:
In field tests, additional loads (surcharge) will increase the stress in the
unsupported soil surrounding the test hole and will tend to cause it to deform.
Using a base plate may reduce the stress.

Table 1: Volume of water per gram based on Temperature

°C °F Water Volume ml/g

12 53.6 1.00048

14 57.2 1.00073

16 60.6 1.00103

18 64.4 1.00138

20 68 1.00177

22 71.6 1.00221

24 75.2 1.00268

26 78.8 1.0032

28 82.4 1.00375

30 86 1.00435

32 89.6 1.00497

Values other than show may be obtained by referring to:
Handbook of Chemistry and Physics
Chemical Rubber Publishing Co.
Cleveland, Ohio

Table 2: Maximum Field Test Hole Volumes and
Minimum Moisture Content Samples
based on Maximum Size of Particle

Maximum

Particle Size

No.4 (4.75mm) 0.025 (0.0007) 100

1/2" (12.5mm) 0.050 (0.0014) 250

1" (25mm) 0.075 (0.0021) 500

2" (50mm) 0.100 (0.0028) 1000

2-1/2" (63mm) 0.135 (0.0038) 1500

Minimum Test Hole

Volume ft3 (m3)

Water Volume

ml/g

Warranty

Humboldt Mfg. Co. warrants its products to be free from defects in material or
workmanship. The exclusive remedy for this warranty is Humboldt Mfg. Co.,
factory replacement of any part or parts of such product, for the warranty of this
product please refer to Humboldt Mfg. Co. catalog on Terms and Conditions
of Sale. The purchaser is responsible for the transportation charges. Humboldt
Mfg. Co. shall not be responsible under this warranty if the goods have been
improperly maintained, installed, operated or the goods have been altered or
modified so as to adversely affect the operation, use performance or durability
or so as to change their intended use. The Humboldt Mfg. Co. liability under
the warranty contained in this clause is limited to the repair or replacement of
defective goods and making good, defective workmanship.

Humboldt Mfg. Co.

875 Tollgate Road
Elgin, Illinois 60123 U.S.A.

Testing Equipment for

HUMBOLDT

www.humboldtmfg.com

U.S.A. Toll Free: 1.800.544.7220

Voice: 1.708.456.6300

Fax: [phone]

Email: [e-mail]

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