The electromagnetic dot timer is a timing instrument that uses AC
power. Its working voltage is 4-6V, and the frequency of the power
supply is 50Hz. It beats once every 0.02s.
Working principle: When the coil of the electromagnetic timer is
energized, the coil generates a magnetic field, the vibrating plate in
the coil is magnetized, and the vibrating plate moves up or down
under the action of the permanent magnet magnetic field. The direction
of the alternating current changes every cycle Twice, so the magnetic
poles of the vibrating plate will change after being magnetized, and
the direction of the force applied by the permanent magnet to it will
also change. When the vibrating plate is subjected to a downward
force, it strikes once, and when the vibrating plate is subjected to an
upward force, it does not Dot, so do it once in a cycle of alternating
current, that is, the time interval between every two points is equal to
the cycle of alternating current.
The electric spark timer is a timing instrument that uses spark discharge
to make small holes on the paper tape to show dots. It uses 220V AC
voltage. When the frequency is 50Hz, it hits once every 0.02s. When
the electric spark timer works , The resistance to the guiding exercise
is relatively small, and the test error is smaller than that of the
electromagnetic dotting timer.
Working principle: The electric spark dotting timer is a timing instrument
that uses spark discharge to make the toner print ink dots on the paper
tape and show dots. Connect the electric spark dotting timer to 220V
power supply, press the pulse output switch, and time The pulse current
sent by the generator connects the discharge needle of the positive pole
and the toner paper plate to the paper plate shaft of the negative pole,
generating a spark discharge, so a series of dots are printed on the paper
tape, and it is discharged once in each cycle of alternating current. The
time interval between the firing points of the electric spark timer is equal to
the cycle of alternating current.
The kitchen timer is a high-end timing device, mainly used in large back kitchen
bases. Eight different food heating time settings can be set at the same time. It
is a convenient and practical back kitchen senior "secretary"! 8 segment timers
with 8 display screens to see the display time of each segment! The appearance
of the timer was made into burgers, ketchup, and cola.
Using such a timer can not only help you better master the time to cook more
delicious dishes, but also integrate well with the kitchen environment. Kitchen
timer, this kind of thing is to prevent things from being boiled on the pot, but
forget to run to do something else until there is a peculiar smell in the house,
it is too late. But with the kitchen timer, this kind of thing will no longer happen.