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Lalit Shukla
Associate

Join Date: May 2012
Posts: 26

Silica Testing Meter

10/29/2012 3:11 AM

We purchased new Hanna silica photometer HI 96705 for silica testing but meter shows the high reading than actual. When we test from photometer (Hanna) 1.5 to 1.9 mg/L

Reading from Merx Silica Kit ( Visual testing) 0.64 to 1.0 mg/L WE also contact Hanna Inst Technical Dept they say Meter is Accurate & showing the correct reading.

Please describe why the reading is unmatched in both.
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

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#1

Re: Silica Testing Meter

10/29/2012 4:16 AM

OK. Please state the temperatures at which both measurements are being taken.

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Lalit Shukla
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Join Date: May 2012
Posts: 26
#4
In reply to #1

Re: Silica Testing Meter

10/31/2012 3:15 AM

sir

Both testing are done at same temp. between 25 to 30 Deg C
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lyn
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Join Date: Oct 2008
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#2

Re: Silica Testing Meter

10/29/2012 7:50 AM

This will be another exercise in futility.
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OSCAR FRIAS
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Join Date: Aug 2012
Posts: 24
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#3
In reply to #2

Re: Silica Testing Meter

10/29/2012 10:54 PM

As the old saying says: the man who has one clock knows what time it is. The one who has two clocks is never sure.

I suggest preparing a set of standard samples of known silica concentrations determined by analytical methods. Then read the samples with both instruments to see which one is right.

If a normalized calibration protocol exists, follow it. The instruments shall be calibrated periodically, especially if transactions based on silica contents are performed.
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Lalit Shukla
Associate

Join Date: May 2012
Posts: 26
#5
In reply to #3

Re: Silica Testing Meter

10/31/2012 3:19 AM

sir

the instrument is new & also we caliberate it with the standard sample which are supplied by Hanna.
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#6
In reply to #5

Re: Silica Testing Meter

10/31/2012 4:22 AM

So what?

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Users who posted comments:

Lalit Shukla (2); lyn (1); OSCAR FRIAS (1); PWSlack (2)

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