Texasmark
Elite Member
- Joined
- Apr 24, 2012
- Messages
- 3,758
- Location
- N. Texas
- Tractor
- Ford: '88 3910 Series II, '80 3600, '65 3000; '07 6530C Branson with FEL, 2020 LS MT225S. Case-IH 395 and 895 with cab. All Diesels
If you want to check resistance you put a lead on one end of the circuit/wire/component and the other lead on the other end/terminal/connection. Set the Ohms scale (resistance scale...the Ohm character looks like a tiny pair of headsets on the meter scale) to the lowest Ohm value....probably 200 on your meter...if like mine (Cen-Tech P30756, yellow in color....I think they are red these days.
Turn the dial to 200 ohms scale (which turns the meter on).....don't forget you need a battery in the meter to read ohms.....Touch the meter leads together and read your lead wiring resistance. In the (room temperature) house mine reads 00.4. I just went and got my meter which was outside and with the 30 degree weather, the reading was 00.0....copper has a temperature coefficient which raises its resistance with temperature.
So you have zero checked your meter for a value.... remember it. Then put the leads across the wiring/circuit/component as mentioned above and read the number. Let's say your zero value was 00.4 and you read 01.4 on the scale. That means that you have one ohm of resistance in that circuit. if your reading is 05.4 you have 5 Ohms.
"Ohms law" is described on the www. Pull it up and read it. I don't know the wattage of the TS but since you have the coil wire, as large as it is, glowing red orange (about 500F or so) you are going to be consuming 50 "Volt"-"Amperes" or "Watts" in electrical terms or more (my guess)....look those terms up too.
With the load needing 50 watts to operate correctly and a 12v battery, you will need 50watts/12volts - 4.2 amperes of current flowing from the energizing switch (whatever that is) through the wire to the TS device......that's assuming the interconnecting wiring has zero ohms of resistance....which it won't.
If the wiring circuit resistance is 5 ohms and the needed 4.2 amperes are flowing through it, the wire itself will drop: Voltage drop = ohms x amperes = 5 x 4.2 = 21 volts..........guess what, that isn't going to happen since you only have 12v to start with and the TS device is going to need voltage and current too. I did that deliberately so that you could see the importance of low wiring resistance (ohms) when you are supplying power....watts...volts x amperes......to a load like a TS device that requires a lot of electrical current....amperes.
Now that you have (hopefully) an idea as to what the TS needs, the interconnect from the battery + through the TS complete circuit needs to be on the order of "zero" ohms...theoretically. A 12 gauge (American Wire Gauge) wire will provide that for you with clean crimped contacts that are clean and shiny where they make contact...internal connecting surfaces......a 14 gauge will probably do.
Questions, ask.
Turn the dial to 200 ohms scale (which turns the meter on).....don't forget you need a battery in the meter to read ohms.....Touch the meter leads together and read your lead wiring resistance. In the (room temperature) house mine reads 00.4. I just went and got my meter which was outside and with the 30 degree weather, the reading was 00.0....copper has a temperature coefficient which raises its resistance with temperature.
So you have zero checked your meter for a value.... remember it. Then put the leads across the wiring/circuit/component as mentioned above and read the number. Let's say your zero value was 00.4 and you read 01.4 on the scale. That means that you have one ohm of resistance in that circuit. if your reading is 05.4 you have 5 Ohms.
"Ohms law" is described on the www. Pull it up and read it. I don't know the wattage of the TS but since you have the coil wire, as large as it is, glowing red orange (about 500F or so) you are going to be consuming 50 "Volt"-"Amperes" or "Watts" in electrical terms or more (my guess)....look those terms up too.
With the load needing 50 watts to operate correctly and a 12v battery, you will need 50watts/12volts - 4.2 amperes of current flowing from the energizing switch (whatever that is) through the wire to the TS device......that's assuming the interconnecting wiring has zero ohms of resistance....which it won't.
If the wiring circuit resistance is 5 ohms and the needed 4.2 amperes are flowing through it, the wire itself will drop: Voltage drop = ohms x amperes = 5 x 4.2 = 21 volts..........guess what, that isn't going to happen since you only have 12v to start with and the TS device is going to need voltage and current too. I did that deliberately so that you could see the importance of low wiring resistance (ohms) when you are supplying power....watts...volts x amperes......to a load like a TS device that requires a lot of electrical current....amperes.
Now that you have (hopefully) an idea as to what the TS needs, the interconnect from the battery + through the TS complete circuit needs to be on the order of "zero" ohms...theoretically. A 12 gauge (American Wire Gauge) wire will provide that for you with clean crimped contacts that are clean and shiny where they make contact...internal connecting surfaces......a 14 gauge will probably do.
Questions, ask.
) Of course, the UPS guy leaves the box on the ground like always and the one barn dog chews it all to **** and I find the valve in the middle of the driveway getting covered in snow....That dog is such a pita, its not the first package hes torn up. 
