Ohaus TRIPLE BEAM MECHANICAL BALANCES User Manual

Balance Cup

Balance
Compensator
Assembly

Bearing Cover

ACCESSORIES

Model No. Item No. Description

183-00

703-00

703-S0

706-00

707-00

80250400

1101-20

80780011

80780014

80780015

80780017

80780108

80250400

80780006

Specific Gravity Rod and Clamp

Footed Polypropylene Scoop,
12” x 6” x 2¾” and Counterweight

Footed Stainless Steel Scoop,
12” x 6” x 2¾” and Counterweight

Vinyl Dust Cover

Metric Attachment Weight Set:
two 1000g and one 500g

Scoop, Stainless Steel,
12” x 6” x 2¾”

Footed Polypropylene Scoop.
12” x 6” x 2¾”

Scale Plate

Poise

Tare Bar

Tare Poise

Holder for Optional
Attachment Weights

SPECIFICATIONS

CAPACITY
With Attachment Weights
Without Attachment Weights

READABILITY

BEAM CALIBRATIONS
Center Beam
Rear Beam

2610g
610g

0.1g

500g x 100g
100g x 10g

REPLACEMENT PARTS:

Contact Ohaus Corporation
or your authorized dealer.

LIMITED WARRANTY

Ohaus products are warranted against defects in
materials and workmanship from the date of delivery
through the duration of the warranty period. During the
warranty period Ohaus will repair, or, at its option, replace
any component(s) that proves to be defective at no
charge, provided that the product is returned, freight
prepaid, to Ohaus.

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 result of service or
modification by other than Ohaus. The warranty period
shall begin on the date of shipment to the authorized
dealer or on the date of a properly returned warranty
registration card. No other express or implied warranty is
given by Ohaus Corporation. Ohaus Corporation shall not
be liable for any consequential damages.

As warranty legislation differs from state to state and
country to country, please contact Ohaus or your local
Ohaus dealer for further details.

1600 Series
Balance

Instruction Manual

Please read this manual before
unpacking, setting up and
using your balance.

Ohaus Corporation
19A Chapin Road
P.O. Box 2033
Pine Brook, NJ 07058, USA
Tel: [phone]
Fax: [phone]
www.ohaus.com

With offices worldwide

*80253380*

P/N 80253380 © 2010 Ohaus Corporation All rights reserved

(sliding weight) from the carton and place the balance on

UNPACKING

Your new precision balance was protected during
shipment by a specially designed carton. Carefully
remove the balance, the attachment weights (included
with some models) and the separately packaged Poise

a reasonably flat and level surface.

Remove the slit rubber washer, which is lodged under­neath the platform support, and the plain rubber washer
that is located above the pointer.

SET UP

Locate the bevel on the back of the center beam and
slide the separate Poise up into it. Tilt the Poise over
into place on the beam.

It is recommemded that the zero balance be checked
peri-odically to ensure accurate weight readings.

WEIGHING

When exact zero balance has been obtained, proceed as
follows:

1. Place the specimen in the center of the Platform.

2. Starting with the largest capacity beam (500 gram),
move the 500 gram Poise toward the right to the first
notch that causes the Pointer to drop, then move it
back one notch, which causes the Pointer to rise.

3. Repeat the above procedure with the 100 gram Poise.

To use the Tare Poise, slide it to a position of
approximate balance, and then rotate the Poise to obtain
exact zero balance.

CARE AND MAINTENANCE

Keep the balance clean at all times. In general, most
foreign matter may be easily removed by using an air
syringe. A piece of adhesive-backed tape pressed
against the Magnet faces will keep them free from dirt.

SPECIFIC GRAVITY DETERMINATION

The net weight of the contents of the container may then
be determined in the usual manner.

FEATURES

• CONVENIENT DIAL READING
Enables weighing to 0.1 gram without the need for an
added poise.

Ohaus Model 183 clamp and Rod Support is an
accessory which elevates the balance for suspending
specimens in water.

The rod is inserted into half inch (12.7 mm) diameter
recess on the underside of the base. The specimen
is attached to the check pin by means of a fine wire
or thread. The check pin connects the check rod
assembly to the platform loop under the base.

Place both sliding Poises and the Dial at their zero
positions.

Move the Tare Poise to the extreme left.

The Pointer should come to rest near the zero balance
position.

ZEROING

To obtain exact zero balance, adjust the Balance Com­pensator (knurled knob) which is located at the left end
of the beam.

4. Turn the Dial until the Pointer comes to rest at zero.

The weight of the specimen is the sum of the values of
the Poise positions, read directly from the Graduated
Beams and the position of the Dial.

OPTIONAL ATTACHMENT WEIGHTS

The total capacity of the balance when Attachment
Weights are suspended from the pivots is 2610 grams.

Without attachment weights, the capacity is 610 grams.

USE OF THE TARE

All models are equipped with a patented Tare Poise
which will counterbalance empty containers up to and
including 225 grams

.

• TIERED BEAM VISIBILITY AND ZERO ADJUST
Combination provides high speed efficiency and
reduces
errors.

• MAGNETIC DAMPING
Based on the principle of a permanent magnetic field
resisting the motion of the non-magnetic aluminum
damper vane. The damping force is proportional to the
velocity of the damper vane and reduces to zero when
the vane comes to rest.

Speeds up weighing by causing the beam to come to
rest quickly without affecting sensitivity or accuracy.
The system is permanent, self-regulating, frictionless
and effective at all loads.

• TARE BEAM AND POISE
Simplifies repetitive weighings and chemical
formulations by eliminating the container weight from
calculations.

• OPTIONAL ATTACHMENT WEIGHTS
store conveniently in the base when not in use.

FORMULAS

• Solids denser than water.
First weigh the specimen in air and then weigh it
immersed in water.

. Weight in air .
Weight in air minus weight in water

• Solids less dense than water.

It is necessary to attach a sinker and then make the
following weighings:

a. Weight of specimen in air
b. Combined weight of specimen in air plus sinker

c. Weight of both specimen and sinker in water.

a
b - c

SG=

in water.

SG=