Originally Posted by bridor15
I have a 1973 Tradewind with a univolt converter that had served its time. I replaced it with a new intellipower converter. Everything works fine with the exception of the ammeter and battery condition indicator. I have a fused black and a fused red wire that I think went to the ammeter in the control panel. The black wire was hooked to the negative battery post and the red wire to a positive battery connection on the univolt. There is no shunt that I can see on the univolt. Does anyone have an idea how the connection should be made? Is there an internal shunt somewhere in the control panel?
Sorry for the confusion so let me try again. Amp meter in simple words; It is a meter which reads VOLUME of current flow [number of electrons flowing in a wire which is measured in Ampere units when any circuit is activated. Most function based on electrical flux field in a wire and will read charge or discharge pending the hook up polarity. In a DC circuit amp meter reads the volume differential between amps used, vs the number of amps supplied by the charger back into the battery circuit. If your rate of charge is higher than the rate of amperage you are using it will show the difference in number of amps on positive side as charge. When the demand for amps exceeds the number supplied by the charger, it will read Negative or discharge. Delivery of amperage [volume] is depended on type and size of the wire, much like the diameter of pipe supplying water. The larger the pipe the bigger volume of water it can pass through.
Voltmeter; Is a unit measure of pressure. In case of 12 VDC circuit, that pressure is preset at about 12-13.5 Volts. Since the volume is required to build up pressure within a storage container [battery], there cannot be pressure [voltage] without volume. Pending the size of storage container [battery], it will determine how much volume [amps] you can store within that pressure. Volume under preset level [not pressurized to 13.5 Volts] will be indicated by Volt meter as low battery voltage. If that pressure in a container [battery] is exceeded, the Volt meter will indicate high voltage at at some point the battery may burst under pressure. This is why the pressure [voltage] must be regulated.
Much the same applies to Amperage in reference to the size of the wire.
If the demand for amperage [volume] under specific pressure [voltage] exceeds the capability of the wire to pass high volume of flow, it will create resistance which heats up the wire until it [bursts] melts the wire.
Since you are installing the Intellipower substitute the Amp meter with Voltmeter. Unlike the Amp meter, the Voltmeter is a much better instrument to monitor the condition of the battery. In case of a dual battery set up use two voltmeters wired via individual switches separately to each battery. If one battery is going down [not holding charge] you can disconnect it before it drags down the working battery. Remember this no Volts no Amperage. If the Voltage drops below 12.5 Volts, Huston, you have a problem, Thanks, "Boatdoc"