When operating the float ball gauge, adjust the air source pressure first, then open the air source valve and output valve and put the weight frame on the float ball. After the float ball floats, the pressure gauge outputs a weight frame. Marked on (0.001MPa or
0.005 MPa) pressure value. Press the weight of the required pressure value on the weight frame according to the requirements of the instrument to be tested. When the float floats again, the pressure gauge can output the required calibration pressure.
Float pressure gauge operation must pay attention to:
(1) When adding or subtracting weights - it should not be too much;
(2) It is not necessary to rotate the weight of the float type pressure gauge, and excessive rotation will affect the accuracy of the instrument;
(3) After the inspection process is completed, the weight should be removed, the float ball pressure gauge valve should be closed, and then the instrument to be removed should be removed.
It is not possible to micro-divide the instrument under test under pressure to avoid impacting the float ball;
(4) The output pressure value of the float type pressure gauge is the sum of the pressure values indicated on the added weight and the weight frame, and the output pressure
The error of the force value does not exceed +0.05% of the value. When the output pressure value is less than 10% of the upper limit of the pressure gauge, the error does not exceed +0.05% of the upper limit of 10%. About the cleanliness of the float gauge:
The float ball gauge should check the cleanliness of the float and nozzle before use. The low cleanliness will affect the output accuracy of the gauge. Floats and nozzles should always be cleaned with Freon or alcohol and dried with clean soft silk. When cleaning, the nozzle can be gently removed from the pressure gauge by hand, and the float will always hit the ground when unplugged. When installing the nozzle, pay attention to the mark of the nozzle outer cylinder, which must be installed in the forward direction. The nozzle can be gently rotated during loading and unloading to overcome the friction of the "O"-shaped seal. The float gauge can be used as follows - the cleanliness test is performed as follows: open the air supply valve, close the output valve, and place it on the float With a certain number of weights, the clean float and nozzle can be flexibly rotated when the float floats.