2X Standing Wave Ratio SWR Watt Meter Radio Power Meter Transmitter with Backlight

2X Standing Wave Ratio SWR Watt Meter Radio Power Meter Transmitter with Backlight Popis

Movable part: Movable coil type
The meter placement position: Vertical
Wire: 2 X 200mm#28 wires, one black and one red. They are used to solder LED positive/negative poles. The end of the wire needs 5mm of copper to be exposed for easy soldering.
Backlight type 1: Two LED are connected in series "6V, 20mA", connected to a resistor, 620ohm1/2W
Type 2: Two LED in series "6V, 20mA", connect a resistor, 1.3Kohm1/2W

Electrical performance:
Standard test conditions: Temperature 20 degree, humidity 70%.
If there is no difference in the test results, it can also be carried out in a normal temperature and humidity environment.
1 Current sensitivity: The direct current required for the pointer to be at the zero scale to the position shown the scale plate.
2 Maximum current sensitivity: 200uA 8% of the current required by the pointer at the zero scale to the full scale position of the scale.
3 Internal impedance: 750ohm 8%.
4 Insulation resistance: Test its insulation value with a 500V voltage, and the insulation resistance between the meter casing and the electrical circuit is above 50Mohm.
5 Friction: After adding the sensitivity current to the meter, it is slowly reduced to zero. The error between the pointer indication position and the zero scale center is 1mm.
6 Zero position: The meter is in the standard position, the zero-scale center is the reference, and the deviation between the pointer position and the zero-scale center is 1mm.
7 Balance: When the meter is tilted forward and backward 90 degrees relative to the standard position, the deviation between the position of the pointer and the center of the zero scale is 1mm.
Colour: White
Material: plastic

Package Contents:
2 x SWR Watt Meter