KH89-DYM3barometerUsed for physics and mathematics experiments
barometerWorking Principle:
The empty box group, which moves axially with changes in atmospheric pressure, serves as an sensing element. It drives the pointer through a rod and transmission mechanism to indicate the atmospheric pressure value at that time.
aneroid barometer/barometer
The instrument consists of the following parts:
The pressure sensing component is a set of vacuum membrane boxes, and the transmission mechanism consists of connecting rods, intermediate shafts, sector gears, and spur gears. The balance spring is used to eliminate transmission clearances,
The indicator part consists of a pointer and a dial installed on the upper support plate. The atmospheric pressure value at that time can be read based on the position of the pointer on the dial. A thermometer is used for temperature correction of atmospheric pressure values.
The adjustment part consists of an adjuster, an adjusting screw, an eccentric axial screw, and an installation screw. The adjuster and the adjusting screw are used to adjust the sensitivity of the instrument. The adjusting installation screw can change the indication of the pointer to conform to the atmospheric pressure at that time. The eccentric axial screw is used to adjust the distance between the spur gear and the sector gear to ensure good meshing.
When the atmospheric pressure increases, the vacuum box is compressed and the pointer is rotated clockwise by a certain angle through a transmission mechanism. When the atmospheric pressure decreases, the vacuum box expands and the pointer is rotated counterclockwise by a certain angle through a transmission mechanism.
aneroid barometer/barometer
barometerPerformance Overview:
1Measurement pressure range:800～1060hPa（80-106Kpa）；
2Temperature range for use:-10℃～+40℃
The scale range of the instrument thermometer ranges from:-11℃～+41℃
3Within the entire range, the indication error of the barometer shall not exceed2.5hpa（0.25kpa）Within the entire range, after increasing or decreasing the air pressure, the pointer returns to its original position with an error not greater than2.5hpa（0.25kpa）
4The smallest division value of the dial is1hPa（0.1kpa）The division value of the thermometer is1℃.
5The weight of the instrument shall not exceed1.5kg
6Instrument size156mm×156mm×86mm
aneroid barometer/barometer
barometerInstructions for use:
Installation: The instrument must be placed horizontally during operation to prevent reading errors caused by tilting.
When reading air pressure and temperature, the following precautions should be taken:1）When reading, lightly tap the instrument housing to eliminate friction from the rotating mechanism.
2）The observer's line of sight must be perpendicular to the plane of the dial.
3）The air pressure reading must be read to the next digit of the fractional value.
4）The temperature reading must be read to the next digit of the division value.
5）Calibrate the pressure reading, temperature, and make additional corrections. The instrument temperature correction value can be calculated using the following formula:P=△p*t
Where:p--Temperature correction value
△p：--temperature change1℃Correction value of air pressure at time
t--Temperature gauge reading.

aneroid barometer/Barometer inspection and maintenance:
When using, it is forbidden to take out the instrument from the housing. If correction is needed, the mounting screw can be adjusted from the small hole in the housing. When pressurizing, it shall not exceed106KpaTo prevent glass from bursting.
Storage of instruments:
The instrument must be stored indoors with good air circulation and no corrosive gases.
The instrument can be transported by any method other than air freight