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        Nanjing Nanzi Electric Instrument Co., Ltd.
         
         
        Welcome to our company, we will be happy to serve you ?     2014-05-19
         
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        Tel: +86-25-51858260
        Fax: +86-25-83412307
        QQ: 2640529080
         
             
         

        1, electricity does not display instrument

        Possible reasons: the auxiliary power source is not added to the instrument
        Solution: if there is a voltage corresponding to use multimeter measuring instrument auxiliary power supply end; auxiliary power supply terminal connection is reliable.

        2, the instrument power flash

        Possible reasons: supply voltage is beyond the scope of work lead instrument, instrument power supply protection
        Solution: the auxiliary power supply disconnected; test whether the auxiliary power beyond the range of instrument tagging; whether the test input signal exceeds 120% of the rated value; testing whether the environment temperature exceeds the use environment temperature limit; the auxiliary power supply to power.

        3, the instrument is energized garbled

        Possible reasons: instrument disturbed
        Solution: the auxiliary power supply disconnected after power on;

        4, showed no

        Possible reasons: transformer ratio is set incorrectly, the mismatched parameters
        Solution: check the ratio Ratio and PT, CT instrument settings are the same; voltage, current ratings are the same;

        5, with no signal response

        Possible reasons: signal was not added to the instrument
        Solution: test instrument terminal is a signal, the terminal connection is reliable.

        6, three-phase meter

        Possible reasons: signal was not added to the instrument, the settings do not match
        Solution: the test input to the instrument terminal has no signal, the terminal connection is reliable; a signal line will show the normal to the terminal phase corresponding to verify whether the instrument problems or peripheral circuit problem; whether the wiring checking an instrument set is consistent with the field wiring.

        7, electrical energy measurement uncertainty

        Possible reasons: voltage and current phase.
        Solution: check the voltage, current, phase sequence is correct

        8, the analog output is not allowed

        Possible reasons: analog output range, corresponding relation between the wrong project
        Solution: to confirm the analog output range bound correspondence; electric parameter confirmation analog output corresponding correctly, such as the U, I, P, Q, ensure the test equipment is normal, if the use of PLC, ensure that the PLC analog input connection settings are correct.

         
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