Care And Maintenance; Optional Accessories; Service Information - OHAUS DIAL-O-GRA 310 Instruction Manual

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

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.

OPTIONAL ACCESSORIES

OPTIONAL ACCESSORIES OPTIONAL ACCESSORIES OPTIONAL ACCESSORIES OPTIONAL ACCESSORIES
DESCRIPTION
Balance Cover
Gem Holder Kit
Test Tube Kit

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.
7
PART NO
110-00
113-00
76912-01