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This review is for the "Watts Up? Pro" meter.
PROS:
------
(1)
Excellent Current Wattage, Cumulative Watt Hours, and Max/Min Watts measurement EVEN AT LOW WATTAGE (<5w, <10w) when Amp measurement error increases.
Wattage is furthermore measured 2,500 times per second regardless of how frequently you choose to log. Thus Cumulative Watt Hours and Max/Min Watts figures are going to be fairly accurate regardless of your log frequency.
(2)
The ability to position the meter at a COMFORTABLE READ POSITION and fit the plug into tight spots is very nice.
(3)
It has a measurement available called POWER CYCLE which counts up each time power is lost/regained, which of course if not accounted for could greatly affect accuracy.
(4)
It automatically puts the information into its own built in spreadsheet making my CUT AND PASTE INTO EXCEL easy. Of course it creates a delimited text file for import, too.
(5)
Found the meter EASY TO LEARN AND USE, and the software took at most 5-10 minutes to learn.
(6)
Most expected values tracked, though most folks will perhaps be mostly interested in:
- Cumulative Watt Hours
- Current Watts
- Power Cycle (which tracks when power went off during measurement).
Others measures: Min/Max Watts, Power Factor, Volt Amp (apparent PWR), Avg Mthly Kwh, Elapsed Time, Duty Cycle, Frequency (Hz), Cumulative Cost, Avg Mthly $, Line Voltage, Min/Max Volts, Current Amps, Min/Max Amps.
CONS/SUGGESTIONS:
--------------------
- Please add a built-in clock like most other data loggers. Right now you note down the start or end time of the sampling and enter it in the program, or just put it into your spreadsheet as I do, however, a product like this should have a built-in clock to date/time tag the log. I will raise it to 5 stars when time logging is added.
- More records storage would be nice. I'd like to sample with 10 second frequency for over a week, for example.
TECH SUPPORT:
---------------
I called twice with a few questions, their tech support was both FRIENDLY and TECHNICALLY KNOWLEDGEABLE.
NOTES:
-------
- To increase the logging points and thus the time it has to log, reduce the variety of measured values (for example, to just Cumulative Watt Hours, Current Watts, and Power Cycle).
- If you didn't note it from above, the Current Watts is an instantaneous measure, it isn't using the 2,500 samples/sec data that the cumulative watts and min/max watts are using.
GET TO KNOW THE OTHER
WATTS PRO METERS:
-------------------------
I suggest reviewing all models of the Watts Up line-up on their website before choosing a model. The models are:
- Watts Up?
- Watts Up? Pro
- Watts Up? Pro ES
- Watts Up? .Net
I think of the "Pro" version as a sweet spot in the line-up. There are 4 models (listed above), 1 below it and 2 above it feature-wise. I would assume anyone interested in this kind of product would want at least the "Pro"'s features.
If you expect to measure power that is either (A) sourced from an inverter sometimes or (B) affected by the source or environment by extreme levels of line noise, then you probably want the ".Net" model version (or for the latter buy a line filter). It has more shielding, more strategic separation of components, etc. If you have a problem with either case you will know right away as the data will go bonkers in an obvious way, I'm told.
The "Pro ES" and ".Net" models store 4x the records of a "Pro" (120,000 vs. 30,000). For example, if you wanted to only track Cumulative Watt Hours, Current Watts, and Power Cycle then you can save 40,000 data points (120,000/3). With 1,440 mins and 86,400 secs in a day, you can determine which you need. Remember that the Cumulative Watt Hours and Min/Max Watts calculation is always based on the 2,500 samples/sec no matter the logging frequency.
SUMMARY:
----------
Highly recommend these meters if they meet your needs.
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