Ohaus 310 Service Manual

DIAL-O-GRAM® BALANCE
Model 310
and
CENT-O-GRAM® BALANCE
Model 311

Instruction Manual

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INTRODUCTION

This manual covers Installation and Operation for the Ohaus Dial-O-Gram® Balance
Model 310 and Cent-O-Gram® Balance Model 311.

DESCRIPTION

Ohaus Dial-O-Gram® Balance Model 310 and Cent-O-Gram® Balance Model 311 are
manufactured from high grade precision zinc castings for the base and precision
aluminum castings for the beam. Agate bearings, hardened steel knife edges, and
stainless steel pans ensure a high standard of quality for these products.

The 3-point base together with the special floating bearing principle and beam design
eliminates the need to have a level adjustment. 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 readings
due to their damping mechanism. Both balances can also be used to make specific
gravity measurements. Model 310 has two beams, each with a sliding poise, and a
graduated dial and vernier which enables readings of 0.01 g. Capacity of the Model
310 is 310 grams. Model 311 has four beams, each with a sliding poise. Capacity
of the Model 311 is 311 grams with a readability of 0.01 g.

Figure 1. Model 310.

Figure 2. Model 311.

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UNPACKING AND ASSEMBLY INSTRUCTIONS

The balance has been shipped with each component packed securely in a protective,
expanded polystyrene container. Follow these instructions and you can assemble
your balance in just a few minutes.

1. Remove the poly-container from the shipping carton and place it so that you
can see the base and specific gravity stand. See Figure 3.

2. Cut the strap and lift off the upper half of the poly-container. Remove the base
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 rotate it as soon as the round end clears the
opening. When the base and the specific gravity stand are upright, the OHAUS
on the stand must be facing down.

Figure 3.

Figure 4.

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