Windy Nation 100 AMP DC Watt Meter - Manual (Page 7)

Watt Meter User Manual
Revision 1.0
If an auxiliary power source of 4.0 VDC or more is used (e.g. small receiver battery pack), the meter
operates independently of power sources on the LOAD or SOURCE leads. This allows measurements down
to 0VDC.
CAUTION: The Red leads and the Black leads of the Watt Meter are connected to each other so either side
can be electrically "hot" when a battery or other power source is connected to one side.
3.2.1 Auxiliary Power
By connecting a power source of at least 4.0 VDC to the 3-pin connector on the SOURCE side, the Meter
can measure down to 0 V (e.g. standard 9V battery). The 3-pin connector’s socket will accept a Futaba J
type, JR or HiTec type servo plug connector. Pin 1 is Negative and pin 2 (middle pin) is Positive. Pin 1 is the
pin farthest from the meter’s SOURCE wires. Pin 3, is to reset accumulated readings. See Section 4.2 for
reset operation.
When using Auxiliary power, you may see small measurement values when the SOURCE and LOAD leads
are not connected or are shorted together (e.g. 0.01 Volts). It is normal for small “shorted lead” voltage
values to be displayed in this situation and this will NOT affect the accuracy of real measurements.
CAUTION: Never short leads for testing with a power source connected to either set of leads!
3.2.2 Initial Verification
• No exposed wires or bare connectors that can short circuit prior to connecting a battery or
power source.
• Wire and connector insulation are not damaged with no bare spots that can short.
o Properly insulate any exposed areas with electrical tape or shrink tubing.
• LOAD wires are safely routed and any unused wires are capped with connectors.
3.2.3 Problems
When power is applied correctly, the meter display will show the "Startup Screen" and then begin
measurements. If the Startup Screen does not appear, immediately remove the power sources and refer to
the troubleshooting section of this manual.
4 OPERATION
4.1 D ISPLAY I NFORMATION
4.1.1 Start-Up Screen
When power is first applied to the meter SOURCE leads, a startup screen with the firmware revision number
is briefly displayed, prior to measurement beginning.
4.1.2 Measurements
The measurement screen is displayed after the startup screen. All data values are identified by their units
(e.g. Ah, Wh, Ap, Vm, Wp) and are updated every 400 mS.
Amps, Volts, and Watts values are continuously displayed while other all other measured values (Ah, Wh,
Ap, Vm, Wp) are presented sequentially, every 2 seconds, in the "Cycle" position of the display.
Page 7 of 11 Windy Nation 04/19/2012