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SERVICE INFORMATION

SERVICE INFORMATION

SERVICE INFORMATION

SERVICE INFORMATION

SERVICE INFORMATION

For Service assistance in the United States, please call Ohaus Corporation toll-free
at (800) 526-0659.  An Ohaus Product Service Specialist will be available to help you.

OPTIONAL ACCESSORIES

OPTIONAL ACCESSORIES

OPTIONAL ACCESSORIES

OPTIONAL ACCESSORIES

OPTIONAL ACCESSORIES

DESCRIPTION

PART NO

Balance Cover

110-00

Gem Holder Kit

113-00

Test Tube Kit

76912-01

     CARE AND MAINTENANCE

CARE AND MAINTENANCE

CARE AND MAINTENANCE

CARE AND MAINTENANCE

CARE AND MAINTENANCE

With reasonable care, your Balance can be kept in good working order.  Keep it clean
and do not drop it.  Foreign matter can be most easily removed with an air syringe.
When the balance is not used, it should be protected by a balance cover.  (Part No.
110).  Never apply oil or any lubricant to the knife edges  or bearings; this will lower
the accuracy of the balance.  From time to time, it may be necessary to clean the
damping magnet faces.  This is best done by inserting a piece of adhesive-backed
tape into the damper vane slot (right side of beam), and pressing it against the magnet
face.  The tape will pick up foreign material and prevent it from interfering with
movement of the damper vane.

The specimen can then be suspended from a fine wire or thread from the lower hook
of the end loop into a beaker or other suitable container of water or other liquid.  If a
great number of determinations are to be made on small solids, the use of a Model
# 113 gem Holder, Counter Weight and Beaker is recommended.  This provides a rapid
method of weighing the object under water and eliminates the cumbersome task of
tying a string or piece of fine metal to the object.

SOLIDS - (denser than water)

SOLIDS - (denser than water)

SOLIDS - (denser than water)

SOLIDS - (denser than water)

SOLIDS - (denser than water)

To determine specific gravity of solids denser than water, the specimen should be first
weighed in air and then weighed immersed in water.
S. G. =             Weight in air

     Weight in air minus weight in water

SOLIDS - (less dense than water)

SOLIDS - (less dense than water)

SOLIDS - (less dense than water)

SOLIDS - (less dense than water)

SOLIDS - (less dense than water)

To determine the specific gravity of solids less dense than water, it is necessary to
attach a sinker and then make the following weighings:

a.   Weight of body in air.
b.   Combined weight of body in air plus sinker in water .
c.   Weight of both body and sinker in water.

Specific Gravity =    a

      b-c

Summary of Contents for CENT-O-GRAM 311

Page 1: ...tion Manual DIAL O GRAM BALANCE Model 310 and CENT O GRAM BALANCE Model 311 Ohaus Corporation Ohaus Corporation Ohaus Corporation Ohaus Corporation Ohaus Corporation 29 Hanover Road Florham Park NJ 07...

Page 2: ...ustment Zeroing is easily and quickly achieved by means of a counter balancing knob at the end of the beam The balances are intended for use in education and industry applications They produce quick r...

Page 3: ...e and specific gravity stand Hold the base upside down Insert the round flat end of the stand through the slot in the base Rotate stand into position as shown in Figure 4 It will turn easily if you ro...

Page 4: ...eaded rod into the recessed area of the base Tighten the nut securely with the throw away wrench 7 Turn the balance over If the specific gravity stand is not already nested in the base lift the round...

Page 5: ...Place the specimen on the pan of the balance Proceed as follows for the fastest method of weight determination Model 310 Model 310 Model 310 Model 310 Model 310 1 Move the 200 gram poise on the rear...

Page 6: ...y lines up with any of the other dial graduations Figure 8 indicates a reading of 6 74 grams Figure 8 Vernier Dial Reading of 6 74 Grams 6 70 gram Graduation Zero Vernier Graduation 0 04 gram Vernier...

Page 7: ...he magnet face The tape will pick up foreign material and prevent it from interfering with movement of the damper vane The specimen can then be suspended from a fine wire or thread from the lower hook...

Page 8: ...This warranty does not apply if the product has been damaged by accident or misuse exposed to radioactive or corrosive materials has foreign material penetrating to the inside of the product or as a...

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