Zeroing The Balance - OHAUS DIAL-O-GRA 310 Instruction Manual

ZEROING THE BALANCE

ZEROING THE BALANCE ZEROING THE BALANCE ZEROING THE BALANCE ZEROING THE BALANCE
Slide all poises to their respective zero positions. Turn dial to zero position. You can
now zero the balance by rotating the knurled balance compensator knob at the left end
of the beam until the pointer on the right lines up with zero. (Note how quickly the
magnetic damping brings the pointer to rest.)
Check the balance periodically since foreign material may accumulate on the beam
or pan and cause a slight change in the zero balance position of the pointer. Whenever
the balance is moved to a new location, the balance should be checked and zeroed
again, if necessary.
WEIGHING WEIGHING WEIGHING WEIGHING WEIGHING
Weighing is a very simple and rapid operation. 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 beam to the first notch which causes the
pointer to drop, then move it back one notch, causing the pointer to rise.
2. Repeat this procedure with the 100 gram poise.
3. Turn the knob slowly until the pointer is exactly centered on the zero indicator.
4. The weight of the specimen is the sum of the values of both poise positions, the
dial position and the vernier reading.
NOTE: With a little practice, you will become proficient in learning exactly how fast to
turn the dial to come exactly to balance position the first time.
Shortcut procedures may be used in instances where approximate weight of the
specimen is known, as follows:
For specimens less than 100 grams, omit step 1.
For specimens less than 10 grams, omit steps 1and 2.
Figure 7. Example of 146.74 Gram Reading.
5