Here is the review of: "Watt's Up" RC Watt Meter & Power Analyzer WU100 Version 2
Product link:
http://www.all-battery.com/index.asp...OD&ProdID=1514
Price: $$59.95 from All-Battery.com
Overall: Excellent product.
Shipping: USPS. Fast, aprox. 3 business days
The Watts up wattmeter and DC ammeter is an in-flight data monitoring device designed to provide the user with a lot of information regarding their power systems vital statistics. The device records the highest values of certain key parameters and the average values.
The unit itself weighs 2.3 ounces and is 2.8 x 1.7 x 0.83 inches in size.
The Watts up DC Ammeter is very simple in terms of how it is connected into the power system. The lithium pack connects to the wires labeled as source and the speed controller connects to the wires labeled as load. Upon connection to a battery the Watts up ammeter immediately starts monitoring the power system after going through it's very short initialisation. The device displays at all times a real-time view of the amps volts and Watts currently being consumed by the power system. In the bottom left of the display the device cycles through various monitored or calculated values. These values are minimum volts, watt hours, amp hours, peak watts and peak amps. The cycle time on the display of these values is two seconds.
The unit has a very clear and easily readable liquid crystal display which is on at all times whilst the ammeter is connected to a power supply.
The full specification for the DC ammeter is as follows:
0-100A, resolution 0.01A
0-60V, res. 0.01V
0-6000W, res. 0.1W
0-65Ah, res. 0.01Ah
0-6500Wh, res 0.1Wh
The ammeter has a very low resistance (0.001 Ohm) and the circuitry only draws 0.007A, this means the ammeter has no more affect on the power system than an ordinary piece of wire.
Conclusion
The 'Watt's Up' Watt Meter and DC ammeter is a straight forward in flight data monitor. It is designed for use at the field giving immediate feedback on flight performance using it's nice large LCD display. It monitors all the important functions of the power system providing both real time, peak and accumulated values. It does this simply, clearly and is by far the easiest device I have used for flight time monitoring.