Using the Main (Bottom) Board:Pins 11 and 12 on the main board are the excitation pins (shown below). Make sure that your -Excitation wire is connected with pin 11 and that your +Excitation wire is connected with pin 12. The second picture is of the jumper inside of the meter. The picture shows the location of the jumper in order to obtain specific excitation voltages. The excitation does change depending on if you have the RS232 board installed. The RS232 board is also shown in the top picture (located to the right of the jumper) in order for you to recognize which set of jumper selections is appropriate for your meter. Once you have selected your excitation voltage, find it on the picture below and connect your jumper accordingly. Once you have reassembled your meter it is ready for use.
Using the Optional (Top) Board:On the optional board there are four excitation pins. Pins 2 and 3 are for your -Excitation and you can use either pins 5 or H for the +Excitation (depending on the desired excitation). If you want +10 VDC, then you simply need to attach your +Excitation to pin 5 and your -Excitation to either pin 2 or 3. However, if you desire an excitation voltage of +5, +15, or +24 then it is necessary to use pin H for your +Excitation. When using pin H it is also necessary to connect the jumper in the desired location for your specific voltage. Below is a diagram of the connections and following that is a picture illustrating the jumper positions for the various excitation voltages.