can’t coincident, re-adjust the contact screw according to above method. Until the two zero line
coincident.
Release the lock nut (14) and (16), move the small and big counter-balance, let the big lever (17) in
the balance as far as possible, then turn the lock screw, lock the big counter-balance (15) on to the
big lever, move the nut (13), in order to move small counter-balance (12), Until the big lever in balance,
then lock the screw, lock the small counter-balance on to the big lever.
Note: the big and small counter-balance must lock reliable, to avoid the adjusted balance damaged
during the test.
Put the specimen in to the flexural clamp, aimed at the alignment plate, turn the hand wheel under
the clamp(1), let the load shaft (4) contact the specimen, and continue to turn a certain angle, let
the big lever have a rise angle, the data determined by the deformation when the specimen fracture,
the principle is that to keep the big lever in balance when the specimen at breaking, rise angle value
can be read from rise angle indicator plate (each cell is 2°). Press the “start” button in the electric
control cabinet, the motor (10) turns the screw rod to drive the cursor counterweight move to right,
the machine start to load, the big lever sink gradually, When the big lever close to balance, the
specimen fracture, the limit switch bump plate (29) push the limit switch, disconnect the motor power,
the motor stop work, at this time, you can read the flexural strength value from cursor scribed line
and scale.
Press the button (21), shift the cursor counterweight to the left, reset the cursor counterweight, you
can do the second test.
V. Maintenance
Keep the machine clean and day, especially, to avoid rusting, so as not to reduce the sensitivity
and accuracy.
The blade and blade bearing can’t have any lubricating oil, in order to avoid sticking dirt, block
the lever movement, impact the sensitivity, dust cover should be put after use.
The right limit switch bump plate in the big lever must be adjusted to let the limit switch start to
work when the big lever fall to the bottom, avoid to adjust it to let the limit switch work location
too early, so as not to damaged the limit switch.
