Sub-station

Aneroid barometer usage

by:HoldPeak     2020-06-08
Aneroid barometer use method 1, please place the aneroid barometer level. 2, please knock gently with fingers screw machine shell or on the surface of glass, in order to eliminate the friction transmission mechanism. 3, observe the pointer with mirror pointer overlap, referred to in the pointer value number is the pressure said, reading to a decimal Numbers. (4), read the gauge temperature value, to a decimal Numbers. 5, air pressure value of a number: read instrument air pressure said value can be used only after the following corrections. 5. 1 temperature correction: due to the change of environmental temperature, will influence on the instrument metal elastic, so the temperature correction must be conducted. Order when the temperature can be calculated by the following: delta Pt = a. Delta Pt - t type - - - - - - Temperature as a - - - - - - - Temperature coefficient values ( Verification certificate attached) 第t - - - - - - - The thermometer reading 5. 2 degrees correction, because the supers and nonlinear transmission, when the air pressure change is produced in error, so the corrections must be indicated in degrees. Calculate method: according to the order as shown in degrees, on the calibration certificate within the scope of air pressure values corresponding to said: with the interpolation method to find the value reduction of delta value for ps5). 3 supplementary correction: in order to eliminate the residual deformation of aneroid on the impact of value from the calibration certificate replenished order when the delta pd after reduction of the pressure value can be made of the type shows: p = ps + ( △pt +△p +△pd)
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