Overview

By default, the eGauge will record Power registers as the "Net" (=) subtype. This means the register will record power flow in both directions. Positive readings will be graphed as a green line, and negative readings as a red line.

However, it is possible to record other subtypes as well. Some of these are needed for basic calculations (such as positive-only subtypes) while others can be used in advanced calculations (the apparent power subtype).

Prerequisites

• Access to your eGauge meter interface and have valid login credentials to make changes.
• Before beginning you should have at least one configured Power register, or be in the process of adding Power registers.

Instructions

Step 1: Access the Installation Settings page from the Main Menu by navigating to Setup → Other settings, then click Installation to the left.

Step 2: To add a power register subtype to a Power register, click the button immediately after the register type dropdown.  This will always show P for a power register.

Step 3: When the subtype option box is displayed, check the options for the subtype(s) you want to add. and click ‘OK’. 

• net (=) - Records both positive and negative power readings. Default, recommended setting for all power registers.
• positive-only (+) - Records only positive values. Negative values are converted to zeros. Cannot be selected at the same time as negative-only (-).
• negative-only (-) - Records only negative values. Positive values are converted to zeros. Cannot be selected at the same time as positive-only (+).
• absolute (|) - Records the absolute value of the total power calculation. Be aware, the order of operation is to calculate the total power of all components in the register and then record the absolute value of that. For example, if the register calculation is CT1*L1 + CT2*L2, and CT1*L1 is -500 W and CT2*L2 is +300 W, the absolute value recorded will be 200 W (not 800 W).
• apparent (*) - Records apparent power (VA), does not take power factor into account

Step 4: After clicking OK in the previous step you'll see the chosen options on the button you clicked to access the subtype option box.  Repeat these steps to add power subtypes to additional power registers, if desired.