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90 day vs 1 year accuracy

Looking for a way to change the MET/CAL default use of the 90 day ACC file to the 1 year ACC file. Has anyone done this? 

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Dale Chaudiere

The accuracy file used by an Instrument FSC is determined by the calibration interval of the asset configured for the associated System Instrument.

Example:

FSC:   5720

System Instrument:  "Fluke 5720A"

Asset Number:   XYZ

If XYZ has a 1 year recall interval, the 5720A 1 year accuracy file is used.   If XYZ has a 90 day recall interval, the 5720A 90 day accuracy file is used.

In the Editor, if no asset is configured for "Fluke 5720A", the 90 day accuracy files is used.  Note, this varies by FSC.  Recent FSCs (5730A, 5502A, 5502A, etc.) default to the 1 year accuracy file if no asset is configured for the System Instrument.

Now, with all that said, you can override the automatic accuracy file selection using the ACCF FSC.   However, you can do dangerous things like assign the 3458A 90 day accuracy file to the 8508 FSC.  :-)

 

 

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James Smith

It depends on how you are going about things.

The asset that is configured as your standard has an applied interval within MetTrack. MetCal will take that applied calibration interval +/- (5% or 10%, I do not remember off the top of my head) and then go search for the accuracy file headers for that particular interval.

So if you have 3 accuracy files for say a 5520, a 90 day, a 6 month and a 12 month, MetCal will see this difference. The Header of your ACC file will give its interval. If asset 1234 is set to 12 month, MetCal will go look up an accuracy file within a % of 12 months. This is the standard way things work out.

As the procedure writter this can be manipulated. You can use ACCF (Not suggested) to pull up a specific accuracy file. READ THE HELP FILE FIRST! If you are not using an FSC and/or REF_ACC(), and you are doing a ACCV, then MetCal will read the headers and determine which accuracy file to use. Utiliizing ACCV is really only needed if you are using all IEEE commands and not an FSC, or if you want a specific of that standards accuacry file.

I have no experiance with ACCF FSC, so I can not provide much insight on that one. We typically utilize the ACCV and REF_ACC() with succesful results with little headach.

As for the pervious posters comment, I would like to clarify that if you have an accuracy file header that does not contain an asset #, then that is used as a general file for all of the model type. If the header has an asset # in it, then MetCal will use that specific file for that specific asset. For instance we have multiple current shunts of the same model. One of them has several years of history, and we have modified it accruacy to a higher degree of accuracy while the other ones are the typical manufacturers spec. So we have two accuracy files for these models, one with an asset number in the header, and one without. The one with the asset number is only recalled by metcal if that particular asset is configured as the asset being used at that time. Otherwise MetCal pulls the generic file for the rest of the models.

 

Example:

 

Begin header

Instrument = Guildline 9211A

Interval = 365 days

Confidence = 2 Sigma

End header

 

Begin header

Instrument = Guildline 9211A

Interval = 365 days

Confidence = 2 Sigma

Asset = 1161949

End header

 

Also as for the previous comment, I am not certain about it not having an interval assigned that it pulls the 90 day as standard. I have not payed enough attention to what it pulls editor when you do not have an asset configured. Perhaps this is something I will have to give some attention to when writting. Thank you for the insight on that. 

Hope this clearifies your question some. 

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