We all know that electronic balances are precision electronic instruments, so we must check their accuracy before using electronic balances. Below we will briefly describe several inspection methods for electronic balances:
1. Inspection of mechanical parts
(1) Check the switch (whether it is too tight, too loose, the eccentric shaft rotation is less than the minimum point or exceeds the minimum point)
(2) Inspection of the column part (column verticality, level, base plate)
(3) Check the beam part of the electronic balance (whether the agate blade is worn, whether there is a slipping phenomenon of the sensing and balance mounds, and whether the pointer is perpendicular to the beam)
(4) Check the suspension system (whether the lugs are hooked, tilted, or front, and the damper is hooked inside or outside the cylinder, or front, said the disk is tilted).
(5) Whether the coder is stuck.
2. Inspection of optical system
(1) Whether the light bulb is off, the brightness is not enough or the lamp is steady.
(2) Whether the optical screen is normal (no light, weak light, black and red light or bar light)
(3) Whether the scale is normal (whether the scale is clear, the scale cannot be seen, the scale is inclined, and the score line is bent).
3. Inspection of measurement performance
(1) Whether the empty zero point has changed.
(2) Whether the empty sense and the full sense are consistent.
(3) Compare the balance deviation with two full weights. After the two full weights are exchanged, eliminate the weight difference and calculate the deviation from the balance.
(4) Add the same small weight to the left and right plates, and compare the sensitivity difference between the two plates.
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