Common problems in the use of wireless vibrating wire acquisition instrument

VS Common problems of wireless vibrating wire mixed signal acquisition instrument

 

1 Can't power on
（ 1） Check whether the power connection is correct , The voltage range should be DC10~24V, The output capacity is no less than 2A, The positive and negative electrodes are connected correctly . If the polarity of the battery is reversed , Even if the power on operation has not been carried out, it will cause permanent damage to the equipment .
（ 2） If battery power is used , Measure whether the battery voltage is too low while keeping the power on button pressed .
（ 3） Check the button battery voltage , Or replace it with a new battery .
2 No communication
（ 1） Check whether the digital interface type and connection are correct , This equipment has RS232 and RS485 Two interfaces , The upper computer should use the correct interface connection to communicate normally .
（ 2） Check whether the wiring sequence is correct .
（ 3） The communication rate does not match , Try to use different communication rates for receiving and sending tests .
3 Automatic mode fails
（ 1） Try turning it on manually and check whether the date and time are correct , If the date and time are incorrect, replace the internal button battery .
（ 2） Check whether the value setting of the time register related to the automatic mode is correct , Pay attention to the data unit .
4 The frequency value of vibrating wire sensor is 0
（ 1） The sensor is not connected or the contact is poor , Or the sensor circuit is open or short circuited , Please disconnect the sensor and measure whether the resistance value of the sensor is normal （ The coil resistance of most vibrating wire sensors is 100~2kΩ Between ）.
（ 2） Incorrect incentive method , Some sensors must use specific excitation methods to start vibration .
5 The frequency value of vibrating wire sensor is unstable
（ 1） Shorten the cable length of sensor and equipment , Or use a cable with low resistivity and good shielding performance .
（ 2） The equipment shell or the negative terminal of the power supply must be connected with the earth （ Ground wire ） Reliable connection .
（ 3） Replace the linear power supply or use the battery power supply and disconnect any AC related lines .
（ 4） Disconnect all connections except the vibrating wire sensor （ Other kinds of sensors 、 Power output load, etc ）, Connect only a single sensor if necessary , To eliminate the crosstalk between different sensors .
（ 5） Check the measuring system （ This device 、 Cable 、 sensor ） Whether there is strong electromagnetic interference and large AC equipment around （ Such as ： Power distribution frame 、 The motor 、 Large engineering equipment 、 Radio, etc ）.
（ 6） The return signal of some sensors is very weak , It is easily affected by the excitation signals of other channels , This will cause the data of this channel to be close to that of other channels .
6 You cannot send wireless data using the mobile network
（ 1） Check SIM Whether the card is in arrears .
（ 2） Whether the signal of the equipment is normal .
（ 1） If you use SMS to send , Please make sure the SIM Whether it supports short message function and has opened short message service .
（ 2） If you use GPRS send out , Please use a third-party tool to check whether the server address and port can be accessed normally .
7 The frequency value is unstable due to the mutual interference between the vibrating wire channels
Modifying registers 20 by 1（ Use “ Slow measurement ”）, Slow measurement can avoid mutual interference between different channels , But the measurement time will increase .