Measuring  Series  Amperage 

1. Set mini-board to correct position, shown below.

2. Set DMM to measure amperage and connect leads as shown*

3. Read DMM

 

In order to take amperage readings a method of using power from a neighboring circuit is necessary.

For example to measure P1 current draw you must switch the dial to P2 position this powers up P2, since an ammeter must be connected in series with a circuit, the red lead of the ammeter is connected to the supply voltage of the P2 circuit and the black lead to P1 circuit. This uses the power from the P2 circuit to power up P1.  This will give the ammeter reading for P1.  

For the rest of the remaining circuit measurement, switch the Rotary Dial to P1 position and use this power source for the remaining circuits as shown below. Note red lead is always connected to the power supply to the circuit and the black lead always goes to the circuit needing power. Note, think of the DMM as a jumper wire with an ammeter in it.

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*For amperage readings care should be taken to protect your meter.  

• It is always a good Idea to set your meter on the highest setting and work back till reading is shown

• The mini-boards are protected to 300mA.

• If the circuit is shorted out and pulls over 300 mA the red light will come on and the green light will go out or flicker.  

• If your meter is set lower than this value the DMM fuse could blow.  

• Each brand of meters is unique and the reference manual should be thouroughly read prior to operation.