Magnetic flap at the scene of the thermometer calibration method is explored

Magnetic flap thermometer does not need to use other means can intuitively reflect the advantages of the actual status of the tank level has been increasingly recognized by people, various manufacturers use some additional technology to enable it to apply to the actual production control. (in a wide range More than 2 m) Magnetic flap the measurement accuracy of the thermometer is often not contrast pressure transmitter is low, so the user is in when using is becoming more and more attention. But the restriction of the actual conditions, maintenance-free advantages of each manufacturer brand couldn't be reflected, detection of demand also will increase. GPQ magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer

1, the structure principle of

magnetic flap thermometer was developed according to the principle of buoyancy and magnetic coupling. When the measured liquid level fluctuation of the container, the thermometer ontology tube also subsequently rise and fall, the magnetic float in the float in the permanent magnets by magnetic coupling to a magnetic column indicator, driven column turn red, white, so as to realize level clear instructions. Through the opening of the built-in dry reed pipe contacts, current or voltage signal transmission. Magnetic flap thermometer in the factory (usually by simulation method This method didn't explain) in this discipline To carry on the adjustment, to ensure that supply match with the actual medium.

2, field calibration concrete step side put thermometer, for example, as shown in figure 1. Figure 1 field calibration line connection and test the basic principle of figure

A scribe lines for thermometer zero; B for the thermometer with the scribed line; C for connecting pipe flange on the mouth of tank or obligate mouth;

D as the liquid level transmitter; E for manual ball valve connecting flange mouth; F for the tank with a thermometer connecting flange; A is the saliva line; B level zero level; For the measured water level c

( 1) Determine medium density

medium density can be measured with standard density meter, can also according to the user to provide specific data collect, medium density should be recorded for the record, to ensure that the medium density can accord with the requirement of thermometer operating instructions. Although in theory have an impact on the value of the thermometer, medium density but the actual use of the zero and full value of the thermometer can directly adjust potentiometer.

( 2) Liquid level adjustment of zero and full

in determining the reference zero point at the same time, adjust the zero potentiometer, makes the output signal is shown as 4 ma; Full adjustment in the upper limit of standard level, increase full range potentiometer, makes the output electric signal display to 20 ma. Under schedule measurement output if there is a deviation, with reference to this method to adjust. Field calibration need repeat the above steps 3 return measurement.

the calibration instrument is simple and practical, the maneuverability is strong, solved the difficult problem of instrument laboratory cannot be detected in a wide range, more practical value. In the case of not direct contact with the liquid medium, if the inclination of tiny, measuring point surface level of tank, also can be replaced with a laser range finder depth steel tape measure, in spite of this, the test also has certain limitation, this method is not applicable to pressure vessel or volatile medium level calibration. GPQ magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer

GPQ magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer

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