0.56inch 0-100V Three Wire DC Voltmeter
This voltmeter’s measurement range is 0-100V，this voltage is just measurement signal and it can’t be regarded as voltmeter’s working power supply. This voltmeter need outer working power supply which can supply DC4.5-30V as working power supply. About three wires，the black wire is communal negative pole，the white wire is connected to measuring voltage’s positive pole，the red wire is connect to working power supply’s positive pole，the measuring circuit and power circuit’s negative pole are communal.
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