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Model: SD-GC96A    SD-GC72A  SD-GC48A     DC Ammeter

Model: SD-GC96V    SD-GC72V  SD-GC48V     DC Voltmeter

Accuracy class: For SD-GC96 and SD-GC72, the accuracy class is 1.5. For SD-GC48, the accuracy is 2.5.

For through current: 100uA 200uA 300uA 500uA 1mA 5mA 10mA 20mA 4-20mA 50mA 100mA 200mA 300mA 500mA 1A 2A 3A 5A 6A 10A 15A 20A 25A 30A 40A 50A. The up limit of though current for SD-GC48A is 15A.

For transformation ratio: the meters should be used with a shunt of which primary voltage is 5A 10A 15A 20A 25A 30A 40A 50A 60A 75A 10…10KA and external secondary voltage is 60mV or 75mV. As long as overload as overload rate and the incoming voltage keep the same, dial scales of all models in this series can be exchanges yet remain the accuracy.

Overload rate of ammeters: ①non-overload ②1.2 times

For through voltage: 50mV 60mV 75mV 100mV 200mV 300mV 500mV 1V 5V 10V 30V 50V 100V 150V 200V 300V 400V 500V 600V.

For transformation ratio: Primary voltage is 450V 500V 600V 1000V 1500V 2000V 3000V 5000V and incoming rated current is 5mA. It should be used with an external fixed resistor.

Overload rate of voltmeters: ①non-overload ②1.2 times

Product performance: All the meters are equipped with pure white silk-screen printing dial scale. The movement is made of high-performance magnetic materials and permanent magnet steel so that it is of good stability. The case is made of oridinary ABS plastics or flame retardant ABS plastics, of which the resistant temperature can be up to 85℃. The base is made of PC plastics or flame retardant PC plastics, of which the resistant temperature can be up to 120℃. The resistant voltage is higher than 2000V. This kind of meter is easy to install which high-strengthen plastic grip piece by screwing down the nut so that the meter is of high immobility.

Principles of measurement and the fearures: Each 240°magneto-electrical meter consists of permanent magnet steel, a high performance magnetizer and a moving coil with two tractive balance springs. When low current flows through the moving coil, magnetic field appears, and then pointer deflects with the movement of magnet coil. When the torque and the restoring torque keep a balance, the pointer on the moving iron will point to a scale mark, which is the measured value.

240°magneto-electrical meters can be merely used for DC measurement. The advantage are high accuracy and sensitivity, low power consumption, wide angle of deflection and easy to read the indication, as well as insensitivity to temperature and external magnetic field, while the disadvantage is the low overload capacity.