Archive for October, 2018

19
Oct

   Posted by: RobPatton   in Tech

Dell manufactured two generations of the PowerEdge R710 server model and therefore two different revisions of the PowerEdge R710 system board. It is important to understand the differences between the system boards prior to upgrading or replacing system components.

All system boards support either PC3-8500 (1066MHz) or PC3-10600 (1333MHz) DDR3 memory DIMMS. All system boards feature eighteen (18) slots; nine (9) for each processorand will accommodate up for a maximum of 288GB of RAM.

Generation I system boards (motherboards) support Intel Xeon 5500/5600 series dual and quad-core processors up to 95W. They will NOT work with any of the quad or six-core 130W CPUs in the Intel Xeon X5600 series. Part numbers for generation I system boards include YDJK3N047H7THW3, VWN1R and 0W9X3.

Generation II system boards added support for Intel Xeon X5600 series 130W processors such as the X5680 and X5690 CPUs. If the front of your PowerEdge R710 has a Roman numeral “II”, it likely has a generation II system board. Part numbers for generation II system boards include XDX060NH4P and YMXG9.

 

My R710s, I have motherboards:

2G7C1L1  Ship date: November 18, 2009  Motherboard 0W9X3 Gen1
5XWYLL1  Ship date: March 03, 2010  Motherboard YDJK3 Gen1
B9T8FP1  Ship date: January 04, 2011  Motherboard NNTTH Gen1
4S361Q1  Ship date: February 18, 2011  Motherboard XDX06 Gen2
6
Oct

   Posted by: RobPatton   in Fixing broken stuff, Restorations

Hi, I’m Rob, and I’m a hoarder collector

I have a lot of batteries.

Sealed lead acid, AGM, Gel, Lipo, Li-ion

The things they all have in common:

Needed to keep things running

Not cheap

Harder to test

They don’t come with a gas gauge (usually)

Batteries are rated in mAh, of Ah  and voltage.   For the sake of this post, we’ll be dealing with only 12v batteries, like a car battery, but not.

Formula is (mAh)*(V)/1000 = (Wh). For example, if you have a 300mAh battery rated at 5V, the power is 300mAh * 5V / 1000 = 1.5Wh.

In TODAY’S case:

I have a 26000mAh battery rated at 12V, the power is 26000mAh * 12V / 1000 = 312Wh.

But how does one tell if its ACTUALLY 312Wh, or 31 Wh?

My testing process:

*disclaimer*

MY testing process will just be “good enough”  I don’t work for NASA building things that go into space.  I just need to be “close”


Step 1:  Charge the battery till complete with my CTEK 25000 12V 25Amp Battery Charger

 

 

This process allows me to remove the bottom of the barrel packs right away – If the CTEK can’t charge it, it goes to the recycle pile, quick and easy.  If the get the green light from the CTEK, we move on to step 2

 

Step2: Build a load.

For my load, I’m using a 400 watt inexpensive 120v power converter.  I’m looking to waste as much power as I can, so it doesn’t need to be pretty.  Today, I have a pair of lights plugged into the inverter.  This load is about 12v @ 6amp, which seems to work pretty well..

 

Now, the gas gauge for this project: Power Analyzer

The link isn’t exactly the same model, I have several, and they all seem to work about the same, and look the same.

Step3: Test.

I connect the meter to the battery (source)

Connect the inverter load to (load)

Turn on the inverter power switch.

Wait.

You’ll have to excuse the scribble that is my handwriting, but the key part is to note the results on the pack

As you can see, the first 3 packs differ greatly.

 

 

 

 

Glad I only have 10 to do, these can take from 2 mins, all the way to an hour each.

Battery # AmpHour WattHour Rated Wh % of Capacity
1 0.00 0.00 312 0.00%
2 0.00 0.00 312 0.00%
9 0.00 0.00 312 0.00%
3 0.50 4.90 312 1.57%
4 1.12 13.38 312 4.29%
5 3.90 47.00 312 15.06%
6 4.94 59.30 312 19.01%
10 6.27 68.60 312 21.99%
7 19.16 210.00 312 67.31%
8 19.40 232.00 312 74.36%

 

Step4: Remove the known bads, recharge the possible goods

 

Back to the CTEK 25000

 

Step5: Retest

 

Step6: Determine a threshold

I’m choosing 65%, but we’ll see.