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PUE graph doesn`t show right value

EcoStruxure IT forum

A support forum for Data Center Operation, Data Center Expert, and EcoStruxure IT product users to share knowledge on installation, configuration, and general product use.

DCIM_Support
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PUE graph doesn`t show right value

This question was originally posted on DCIM Support by Boris Majdandzic on 2019-01-18


Hi,

I have problem with meter at DCO. Value is shown ok, but meter jumps arround.

I have attached a picture of the problem. Please send solution.

(CID:138807090)

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9 Replies 9
DCIM_Support
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Re: PUE graph doesn`t show right value

This comment was originally posted on DCIM Support by Greg Sterling on 2019-01-18


This looks like a data issue with the data used to configure the PUE. Can you send a screenshot of the configuration screen? Are the units mixed meaning one or more readings are in watts the others in Kw?

Regards

Greg Sterling

(CID:138807249)

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Re: PUE graph doesn`t show right value

This comment was originally posted on DCIM Support by Boris Majdandzic on 2019-01-22


Hi,

I am using energy measurments from PDU`s & PM800.

(CID:138808034)

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Re: PUE graph doesn`t show right value

This comment was originally posted on DCIM Support by Boris Majdandzic on 2019-01-22


I will try with power for DCIE.

(CID:138808036)

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Re: PUE graph doesn`t show right value

This comment was originally posted on DCIM Support by Boris Majdandzic on 2019-01-24


Same with DCIE graph. Can you please assist, customer is not satisfied.

(CID:138809114)

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Re: PUE graph doesn`t show right value

This comment was originally posted on DCIM Support by Boris Majdandzic on 2019-01-24


Also I have tried to calculate PUE using sensor "Real total power" from SE PM800 meter & Output power of the UPS & PUE shows 0.00 & same thing with pointer it shows 5.

Can you please explain why doesn`t PUE calculate values?.

(CID:138809116)

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Re: PUE graph doesn`t show right value

This answer was originally posted on DCIM Support by Jef Faridi on 2019-01-24


Hi Boris,

The power usage effectiveness PUE is basically equal to "Power in"/"IT Load".

The "Power in" and "IT Load" values can be manually entered numbers and/or added device sensor measurements.

 

In the following illustration:

total "Power in" is 48.000

and total "IT Load" is 30.000

so the PUE for this configuration would be 48.000/30.000 = 1.6

which is also displayed by the software:

The PUE dial, by design, may show/point to values between 1 and 5 - numbers outside of this range (1-5) can not be pointed to, but the calculated value may be displayed for you.

So, basically the calculated and displayed PUE depends on what you enter!

Kind regards

(CID:138809299)

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Re: PUE graph doesn`t show right value

This comment was originally posted on DCIM Support by Boris Majdandzic on 2019-01-24


Hi, I have figuered what is a problem with this. I just divides numbers, so for aproximate value  I have to use multiplier. Mention this in DCO training.

I will check this for few days & see if it works. 

 

(CID:138809344)

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Re: PUE graph doesn`t show right value

This comment was originally posted on DCIM Support by Jef Faridi on 2019-01-24


Hi Boris,

Different Multiplier can be used when the numbers are in different units, for example if one of the measurements/values in KW and the other one in W.

If all numbers are in the same unit, then using Multiplier 1 is good enough.

Kind regards

(CID:138809348)

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