C58D DC DC0-50A digital digital display three 0.56 inch LED display ammeter head 1% error
1、This DC ammeter range is DC0-50A.
2, this ammeter must be used with 50A/75mV shunt, but this price does not include the shunt
3, must use external power supply, power supply voltage DC4.5-28V.
4、Special Note:In order to take power from the measured line to the ammeter, this ammeter is designed to have a common ground between the power supply and the input, i.e., the black line in the sampling line (thick line) is the ground line, while the other thick line is connected to the input of the amplifier circuit in the ammeter. Therefore, the sampling line (thick wire) and the shunt connected to it should never be connected to the positive pole, and must be connected after the appliance (i.e., the negative of the appliance load.). Otherwise, it will burn the ammeter instantly, causing no display or display---. Please buyers must confirm the pole before purchase) The two thick wires of the ammeter and the shunt connected to them must be connected between the two negative poles! Please refer to the wiring diagram on the webpage for the specific connection. The store has already made a prominent position in the web page, will be re-emphasized in Want, but also because of the wiring error caused by burning the table, the store is not responsible.
5, ammeter input impedance is high, the power supply ripple requirements are high, and easily disturbed. Please do not use poor power converter (especially DC/DC switching power supply). Don't put the ammeter and shunt close to the interference source (such as electric car charger), the lead between the shunt and the ammeter should not be too long, if you have to be long, please use shielded wire!
6, the current shown on the ammeter is the measurement current, the loss can be ignored.
6, the ammeter is not suitable for use in electric vehicles. 1, electric vehicles in outdoor use, the ammeter is easy to moisture into the water leading to damage: 2, the ammeter and the shunt on the line between the ammeter and the shunt, the signal is very weak, the maximum is only a few tens of millivolts. Such a small signal, especially easy to be interfered with. Coupled with the use of electric vehicles, this connection will be very long, attenuation and interference will seriously affect the work of the ammeter. So it is not recommended to use the ammeter on the electric car.
7, Note: This kind of electrical instrumentation needs to be installed by professionals who understand electrical and electronic, the installation of the use of unknown ordinary consumers, please be careful to buy!