Does it work with positive or negative current?
740140
you will need a positive wire from the battery. You can also make this work on your head lights with a TPST switch and a SPST switch.
2070009
Connecting the negative (black) first is the safest approach. This cable does work well with a small compressor. Enjoy!
1550327
I have 3 in service and I just tested one on the bench by reversing the source and load. They DO NOT read current in the reverse direction.There is info on the Amazon Site as how to hook up the amp meter. The yellow wire goes to the load negative
1098681
If you switch the input polarity the unit will not function at all. It has a diode. The unit will not light up. It will not turn on. It will not work. DC polarity must be connected as shown on diagram. Can you tell me why you wanted to change there polarity?
1068501
by the look of the drawing on the side, 4 goes to the positive on the coil on the SSR and 3 goes to the negative to the coil of the SSR. but I would be surprised if it polarity matters on the Solid State Relay.
1627408
Check if the source of 12v positive and negative of the monitor and the camera when you put reverse are reading the adequate current simustaniosly.
789074
The meter supply with polarity connector, black and red wire, which represent minus and plus. The unit does not work at all if change polarity.i do not know what will happen if connect minus 5 v and plus 5 v. without ground. I assume it will not work or just show something wrong. Also, I take a look on surface mount parts and see that red wire via connector goes to diode. You may order this little thing just for few $ and blew up it under your desire in many different ways.
795333
Yes. My understanding, reading the instructions, is that it will tolerate reverse current. It just will not register the reverse amperage. So two wired in opposing each other would allow one to log incoming amps and the other to log outgoing amps.
2198658
No, this produces no negative voltage. The "-" terminal is marked to indicate what you would normally refer to as DC ground
939307
The photo is wrong. I think they just used a generic photo and didn't think to blur out the polarity as well as the output voltage and current. The polarity of the adapter is actually "negative polarity". The output voltage and current is listed as 8V - 10V; 1A - 2A. This is a pretty big range, and I think it is causing the adapter to work for some people and not work for others. Mine works with my PT-1090.
1649917
It all depends on the type of DC motor you use.If the motor will run directly from DC power source, such as a small battery, in both directions (by reversing + and -) then it will also work in both directions with controller. I am using this controller with dad switch. HOWEVER THE SWITCH TO CHANG POLARITY NEEDS TO BE PLACED BETWEEN CONTROLLER OUTPUT AND MOTOR. IT WILL MOST LIKELY NOT WORK IF DPDT SWITCH IS PLACED BETWEEN POWER SOURCE AND CONTROLLER. I MYSELF DID FIND A DC MOTOR THAT THANKS WORKS VERY WELL.I CAN CHANGE THE DIRECTION OF SHAFT WITH DPDT SWITCH AND VERY THE SPEED IN EITHER DIRECTION WITH THE CONTROLER. I HOPE THIS HELPS. It all depends on the type of DC motor you use.If the motor will run directly from DC power source, such as a small battery, in both directions (by reversing + and -) then it will also work in both directions with controller. I am using this controller with dad switch. HOWEVER THE SWITCH TO CHANG POLARITY NEEDS TO BE PLACED BETWEEN CONTROLLER OUTPUT AND MOTOR. IT WILL MOST LIKELY NOT WORK IF DPDT SWITCH IS PLACED BETWEEN POWER SOURCE AND CONTROLLER. I MYSELF DID FIND A DC MOTOR THAT THANKS WORKS VERY WELL.I CAN CHANGE THE DIRECTION OF SHAFT WITH DPDT SWITCH AND VERY THE SPEED IN... » Read More It all depends on the type of DC motor you use.If the motor will run directly from DC power source, such as a small battery, in both directions (by reversing + and -) then it will also work in both directions with controller. I am using this controller with dad switch. HOWEVER THE SWITCH TO CHANG POLARITY NEEDS TO BE PLACED BETWEEN CONTROLLER OUTPUT AND MOTOR. IT WILL MOST LIKELY NOT WORK IF DPDT SWITCH IS PLACED BETWEEN POWER SOURCE AND CONTROLLER. I MYSELF DID FIND A DC MOTOR THAT THANKS WORKS VERY WELL.I CAN CHANGE THE DIRECTION OF SHAFT WITH DPDT SWITCH AND VERY THE SPEED IN EITHER DIRECTION WITH THE CONTROLER. I HOPE THIS HELPS. « Show Less
2206718
john it works using 110-120 volts ac current. buy it and enjoy using it but remember to use good bits using cheap bits won't do a good job.
1849286
I selected "no" but should have selected "yes" This only works with 110v. Sorry for the confusion.
479466
Electrical current no matter where you live is positive to Negative.Because current is not affected by Gravity like water is. You will need an adaptor because the plugs feet are stright up and down not slanted like in Australian plugs
1618218
Yes polarity matters. I don't know which is + or - however. I tested it one way, didn't work, reversed the polarity, worked.
1846092
When testing polarized parts, such as a diode. It should only allow current in one direction. When you try to push current through it in the wrong direction it will read .0L, because it wont let anything through. I had to check diodes for a power supply. When I connected it in the correct direction, it read .5, but in the wrong direction, .0L.
739243
Yes it will. AC or DC. Just clamp unit around positive conductor and select proper current on meter.