Teaching instrument is the material base of experiment teaching, and it is the important guarantee to improve the quality of experiment teaching. In recent years, because of the change of educational concept, the school has a new comprehensive understanding of the status and function of experimental teaching. Actively invest funds to purchase instruments. With the increasing of the teaching instrument, the management mode should be changed from extensive management to the deep scientific management and prolong the service life of the instrument.

  Shan anti-deformation

  The storage of teaching instrument should be sorted according to the catalogue order of the instrument, according to the type of fixed cabinet, the cabinet is layered and the cabinets are stored. Also according to the geometrical size, the shape of the performance of the use of flat, vertical, hanging, can not be stacked, inverted, should also be based on the principle of light weight. Main parts, accessories, components to be put together, to maintain the complete set of equipment. For example: inclined car, wooden ruler, spring and other instruments should be placed or suspended horizontally to prevent damp or extrusion after bending deformation. meters, balances, microscopes and other instruments should be vertical. Mechanical instruments on the transmission belt, tape, spring clockwork, etc. should be removed after use to relieve tension is free State, so as not to cause elastic fatigue and loss of elasticity. Rubber plastic products should not be oily, acid-base substances, should keep dry and clean. The rubber hose can be placed in the paper or basin, sprinkle talcum powder, in case of brittle cracking or adhesion. Plastic parts need to prevent impact, the sun is easy to deform after heating.

  Shan Corrosion Protection

  The dim humidity or poor ventilation of the instrument room often causes some metal instruments to rust and cause losses. Water vapor in a variety of instruments metal surface formation of a film, and metal oxidation reaction, so that the appearance of rust on the surface of the metal coating off, the circuit board on the copper foil long patina and circuit, circuit capacitance decay. So the instrument should be used Bushi swab, remove the sticky acid and alkali, salt and perspiration. A part of the metal surface is coated with a neutral Vaseline or paraffin and wrapped in oil paper to insulate the metal parts from direct contact with the air. The movement part of the instrument should be coated with oil, the precious precision instrument to be coated with the oil, the knob coated with butter.

  The electronic instrument has a direct effect on the insulation strength and life after damp, so it should be electrified once a quarter to prevent leakage of the insulator. The electronic components rust causes the component tube foot rust to break, if to damp should first use the infrared lamp to illuminate or uses the hair dryer to bake, must in the internal completely dry before the access circuit use. Spiral micrometer, meter and other equipment should be paid attention to regularly smear anti-rust oil. Optical instrument surface moisture easily adsorbed water molecules after the production of Mildew point, dissolution of glass affect its optical properties, require commonly used mirror paper or flannel wipe stains, do not touch the optical elements directly with the hand, lest grease, sweat sticky stain produce mildew, damage components. In addition, you must regularly open the instrument room doors and windows, so that indoor air convection to exclude moisture. Conditional school, the instrument room can install the automatic dehumidifier to drive the tide.

  Shan dustproof

  The movement of the dust accumulation instrument will accelerate the wear, the metal surface will be sticky with water vapor to cause corrosion. The general method of dust removal is: Wood parts can be varnish, bakelite paint part can be waxed with a soft cloth sassafras, other instruments of dust can be used soft brush brush, can not brush the part can be used rubber balloon, trachea blown.

  Oscilloscope, projector and other equipment to add dust cover, in case the dust falls around the blowhole and affect its performance, electrostatic instrument adhesion dust, the surface of a number of micro-cutting-edge, charge directly from the tip through corona discharge, insulation performance is affected, resulting in experimental phenomenon is not obvious, after use must be wiped with cloth sweat, coated with thin oil dust and rust. The adhesion of the optical instrument to the dust will affect the transmittance and require that the surface be kept very smooth and clean. The instrument must be covered or placed in a box at any time after use. Dust application brush, with gas source blowing, not with wet cloth sassafras. The indoor floor of the instrument should be constantly mop clean.

  Shan Shockproof

  Some of the instruments in the moving, require a smooth movement, light handle, avoid collisions. Multimeter, galvanometer, etc. in the process of moving to prevent violent vibration, or the pointer swing too big easy to touch. The balance of the general requirements of the single layer, both sides of the pallet under the rubber to advance, a single pad or no plastic pad should be around the tray of two overlap after putting together, to avoid the balance in the moving process and make the blade wear. Put in or remove objects, weights, should be in the balance of the beam was braking, the absolute value can not exceed the maximum weighing of the balance, to prevent the shaking edge wear, affect the sensitivity of the balance.

  Some instruments in the use of a period of time, can not be moved immediately, such as the projector, projectors and other work temperature is very high, after the power off immediately moving, the filament is easy to break, resulting in equipment can not be used.

  Shan non-magnetic

  When the magnetic instrument is stored, it is necessary to note that the closed loop magnet of the outer magnetic field itself is not identical to the polar phase, to the opposite extreme, the direction of the best is north and south side, and in the magnetic extreme surface adsorption on the armature, but also the opposite pole phase suction storage, in order to facilitate the formation of magnetic circuit, to prevent degaussing, not to stack clutter. The magnetic needle should be kept free to rotate away from other instruments with magnets. Electromagnetic Iron equipment storage, do not put strong magnet and magnetoelectric meter together, to avoid the electric meter in the external strong magnetic field influence, and reduce the sensitivity, so the electromagnetic instrument storage to consider the impact of other instruments.

  Shan Moth

  Biological specimens and patterns must be placed in the dry moth-proofing place, in order to prevent the stripping of specimens of feathers or fur deterioration, must be regularly stripped of the specimen storage cabinets to add desiccant and preservatives. Immersion specimens must be fully immersed in preservatives for a long time, such as the preservative liquid surface or preservative discoloration (under normal circumstances, the preservative should be colorless and transparent), must be added or replaced in time.

  Shan specification Use

  In addition to scientific management of the life of the instrument, it also depends on whether the operation conforms to the specification.

  The use of power: according to the experimental requirements and the power of the rated current value of the election, in order to avoid overload avoid short-circuit, general requirements should be connected to the circuit after the check is correct, the power supply. Open the power when the general low voltage power supply preheating, after opening high-pressure, to ensure the safety of the instrument. After the experiment, the source should be cut off and then the circuit should be dismantled. Electrical appliances: Before use to understand the instrument's rated voltage, current value (generally in the instrument nameplate or instructions on the note), use do not exceed the rated value, so as not to shorten the life of electrical appliances, or even damage electrical appliances. In the experiment, the induction motor and other electrostatic instruments should be farther away, because the electrical spark discharge will make the air ionization, affecting other electrostatic instruments of normal electrification.

  The use of instrumentation: to root Shan power supply, circuit conditions, select the appropriate range, first selection of high-grade range test in the gradual use of low-grade range. If the scale is too large, it will affect the accuracy of measurement, the scale is too small, it is easy to damage the meter, resulting in severe impact or burnout of the head coil. In addition to the above-mentioned management of teaching instruments, some of the malfunctioning instruments such as electric meters, microscopes, projectors and so on should be regularly inspected to maintain accuracy.