Instructions for use:The module is wired as defined, and the supply voltage is 7-36V (if the output is to 10V, the supply voltage must be greater than 12V).After power-on, the D2 light should be on, otherwise check the line connection. The board is reversely protected, and the reverse connection does not burn.When the current input is at the minimum value (0 mA or 4 mA), adjust the ZERO potentiometer to make the VOUT output the minimum value (0.0V or other voltage).When the current input is at the maximum value (20mA), adjust the SPAN potentiometer to make the VOUT output the maximum (3.3V or 5V or 10V, when the input is 4-20ma, the output can be as small as 2.5V).According to your needs, select the appropriate range through the jumper cap:4 20ma:0 2.5V range: J1 1, 2 feet shorted, 3, 4 feet shorted0 3.3V range: J1 1, 2 feet are disconnected, 3, 4 feet are disconnected0 5.0V range: J1 1, 2 feet shorted, 3, 4 feet shorted0 10.0V range: J1 1, 2 feet shorted, 3, 4 feet disconnected0 20ma:0 3.3V range: J1 1, 2 feet shorted, 3, 4 feet shorted0 5.0V range: J1 1, 2 feet shorted, 3, 4 feet shorted0 10.0V range: J1 1, 2 feet shorted, 3, 4 feet disconnectedNote:Light shooting and different displays may causethe color of the item in the picture a little different from the real thing.The measurement allowed error is+/-1-3cm.We highly appreciate all custome rsopinions to improvethe selling, also if anything you unsatisfied, please contact us for probable best solution. Thank youPackage Included:4PcsCurrent to Voltage Converter Module 0/4-20mA to 0-3.3V 0-5V 0-10V Voltage Transmitter Signal Conversion Conditioning Board(If there are any problems with the product, please send us pictures.Tell us more details about this problem)