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mikoil
Silver Member - 10 or more posts
Posted
Dasco FR 205 reference oil sample 39 ppm for Aug
Aug/07 40 ppm
Oct/07 27 ppm
Feb/08 10 ppm

does anyody have any suggestions as to why this additive would decrease. What is the main purpose of phosphorus in water glycol?

I look forward to your comments.
Thank you.
 
Posts: 10 | Location: Ontario,Canada | Registered: Sat February 16 2008Reply With QuoteEdit or Delete MessageReport This Post
mr. Hughes
Double Platinum Member - 100 or more posts
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Check with lab their method and calibration curve for P. Often this element is calibrated on high line (900 ppm).
 
Posts: 207 | Location: Invicta Oil Lab, Norway | Registered: Fri March 05 2004Reply With QuoteEdit or Delete MessageReport This Post
Roger Davies
Platinum Member - 50 or more posts
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Mikoil, is the system a previous conversion from mineral oil to Water Glycol?
IS Phosphorus present in Virgin Dasco 205?
Likelyhood is that this is a contaminant and that The P is being diluted by top ups of fresh fluid.
Levels of P at ~25ppm unlikely to be the additive in Dasaco 205.
Is there Zinc at roughly the same level(ZPPD)?
 
Posts: 63 | Location: SGS Vernolab Stanlow UK | Registered: Tue April 12 2005Reply With QuoteEdit or Delete MessageReport This Post
Andrew
Silver Member - 10 or more posts
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I second Mr Hughes. P is normally calibrated with 100ppm to 900 ppm fluid. P results are often not reproducible in the lower values.
 
Posts: 15 | Location: SA | Registered: Mon May 17 2004Reply With QuoteEdit or Delete MessageReport This Post
mikoil
Silver Member - 10 or more posts
Posted Hide Post
quote:
Originally posted by Roger Davies:
Mikoil, is the system a previous conversion from mineral oil to Water Glycol?
IS Phosphorus present in Virgin Dasco 205?
Likelyhood is that this is a contaminant and that The P is being diluted by top ups of fresh fluid.
Levels of P at ~25ppm unlikely to be the additive in Dasaco 205.
Is there Zinc at roughly the same level(ZPPD)?


Not sure about any conversion in any recent times, but good thought, I will check. Thanks Roger. They do top up regularly. Will also check the Labs procedure for calibrating. Thanks all,
Will keep you posted.
 
Posts: 10 | Location: Ontario,Canada | Registered: Sat February 16 2008Reply With QuoteEdit or Delete MessageReport This Post
mikoil
Silver Member - 10 or more posts
Posted Hide Post
quote:
Originally posted by Roger Davies:
Mikoil, is the system a previous conversion from mineral oil to Water Glycol?
IS Phosphorus present in Virgin Dasco 205?
Likelyhood is that this is a contaminant and that The P is being diluted by top ups of fresh fluid.
Levels of P at ~25ppm unlikely to be the additive in Dasaco 205.
Is there Zinc at roughly the same level(ZPPD)?

Zinc is stable @~2 ppm on 9 sampled machines but one has a value of ~24ppm, probably no concern at this stage
 
Posts: 10 | Location: Ontario,Canada | Registered: Sat February 16 2008Reply With QuoteEdit or Delete MessageReport This Post
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