2.
Adjust the poises on the beams to bring the scale into balance.
3.
To determine the weight of the unknown mass, add the weight(s) on the right hand platform to the amounts indicated
on the two beams.
Use of the Tare Poise
(Models 1510-DT and 1560-SD)
For those models which are equipped with the Tare Beam Assembly a patented tare poise can be used to tare off
containers which weigh less than 200 grams.
With the container on the left hand platform slide the tare poise to a position on the tare beam which indicates
approximate balance. Rotate the poise in either direction to position it precisely on the tare beam.
When not in use, the tare poise is to be moved all the way to the left to the tare beam.
Specific Gravity Determination
A Clamp and Rod Support Ohaus part number 183-00, is an accessory used to elevate the balance for suspending a
specimen in water. The rod is inserted into the 1/2 inch recess on the underside of the base. By means of a fine wire or
thread, the specimen is attached to the check pin which connects the platform loop to the check rod. The procedure for
weighing a suspended specimen is the same as that for weighing an unknown mass on the platform.
Care and Maintenance
The following practices will assure that your balance will give you years of satisfactory and trouble-free service.
When the balance is not in use, remove any mass or weights from the platform(s). Move one of the poises away from
zero so that the balance is not in equilibrium. This will stop the balance from oscillating and prevent unnecessary wear.
Use and store the balance in places free of vibration.
Never lubricate the scale bearings. The bearings in these balances are high grade polished agate V-blocks and the knife
edges are hardened, precision-ground steel. This type of bearing works most efficiently when clean and dry.
Keep the balance clean at all times, being particularly careful not to let dirt accumulate in the vicinity of the bearings. If
the bearings should become dirty, first try to clean them by using an air syringe. If this is not satisfactory, the bearing
covers will have to be removed. When the bearing covers are returned, it is essential that the hardened blue steel
friction plates are replaced in the recesses provided.
Cleaning Magnet Faces
In general, most foreign matter may be easily removed by an air syringe. If the damper vane still does not move freely,
proceed as follows:
1.
CAREFULLY turn the balance on its side.
2.
Remove the four (4) screws that mount the magnet case to the underside of the base.
3.
Remove the magnet case.
4.
Clean the magnet faces by pressing a piece of adhesive-backed tape against them.
5.
Reinstall the magnet case.
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