Aneroid barometer Weight 1.5 (kg) Dimensions 156 * 156 * 115 (mm) resolution is a measurement accuracy of the measurement object 1hpa atmospheric pressure measurement range 800-1064hpa Model DYM3 brand ?? Huayu use a characteristic ??? DYM3 Empty Box barometer based on a deformable element for sensing the atmospheric pressure measuring instrument. It is easy to carry, accurate measurement, wide load range, easy maintenance, no mercury pollution, etc., are widely used in meteorology, military, aviation, marine, agriculture, surveying, geology, industrial and mining enterprises and scientific research fields, as the measurement atmospheric pressure of conventional instruments. 2 ?? works ??? aneroid barometer is made of an elastic metal thin film sensing element as an empty box, it will be converted into an empty box atmospheric pressure flexible shift, driven by a lever and the transmission mechanism pointer. When deflected clockwise direction, the pointer indicates the outlet pressure is increased the amount of change, on the contrary, when the pointer counterclockwise direction, indicates the amount of change in pressure reduction. When an empty cassette elastic stress and atmospheric pressure equilibrium, the pointer stops rotating, then the pressure value indicated by the pointer is then the atmospheric pressure value. 3 ?? technical performance and specifications 3.1 Measuring range: 800 ~ 1064hpa 3.2 Operating temperature range: -10 ~ + 40 ℃ 3.3 through temperature, showing the degree of measurement error or supplement and after no more than 2.0hpa 3.4 shows the minimum score dial: 1hpa 3.5 attached table minimum temperature scores: 1 ℃ 3.6 Instrument weight of not more than 1.5Kg 3.7 Instrument Size 156mm * 156mm * 115mm 4 ?? Please use 4.1 aneroid barometer used horizontally. 4.2 reading buckle with your fingers gently knock the instrument housing or glass surface to eliminate the transmission mechanism of friction. 4.3 observe pointer pointers overlap with the mirror, then the pointer value is the number represents the value of barometric pressure readings accurate to one decimal place. 4.4 represents the value of the barometer read the temperature, accurate to one decimal place. 4.5 Number of demand pressure values: pressure represents the value of the instrument to read only after these revisions before using. 4.5.1 Temperature revised: due to environmental temperature changes, will have an impact on the elasticity of the metal instrument, so the temperature must be revised. Positive temperature set by the following calculation:? △ Pt = at where △ Pt-- temperature set a-- positive temperature coefficient (with verification * on) t-- thermometer readings 4 shows the degree of revision 5.2, due to air Nonlinear box and drive, when the index finger pressure change will produce an error, it must be shown in the revised degree. Demand calculation method: * according to the indication on the test set comes in the pressure represents the value of the corresponding pressure range: value obtained by interpolation revised indication △ ps 4.5.3 Additional Corrections: In order to eliminate the remaining empty boxes Deformation of the indication generated to obtain pressure values ??supplement provides positive △ pd revised after the test * on by the following equation shows: p = ps + (△ pt + △ ps + △ pd) 5 ?? Notes 5.1 Instrumentation When must be horizontal, in order to prevent the reading error caused by tilt. 5.2 Users Do not remove the plastic housing of the instrument, so as to avoid unnecessary damage. Please pay meteorological measurement agency or repair work when there is a fault. 5.3 As the instrument supplementary set positive change at any time, and therefore provide a positive complement not exceed six months period of use, you must re-test when exceeded. 5.4 users are not allowed to mobilize the adjusting screw, to avoid increasing the error of the instrument. 6 ?? storage, transport and packaging 6.1 The instrument should be stored in a dry, ventilated, non-corrosive gases and severe vibration. 6.2 instrument using any other method other than by air transport outside. 6.3 Instrument must fill the box with cushioning material, outside the box should be marked "Handle with Care," "precision instrument," "non-inverted" and so forth. 7 ?? complete sets of equipment 7.1 7.2 Taiwan aneroid barometer Product Manual 1 7.3 qualified products manufactured instrument box * 1 7.4 1