YSI 9300 Photometer - Manual (Page 62)

Test Procedure
1 Fill test tube with sample to the 10 ml mark.
2 Add one Cyanuric Acid tablet and allow to disintegrate for at least two
minutes. A cloudy solution indicates the presence of cyanuric acid.
3 Crush any remaining undissolved tablet and mix to ensure uniformity.
4 Select Phot 13 on photometer.
5 Take photometer reading in usual manner (see photometer instructions).
6 The result is displayed as mg/l.
Note
The range of the test is 0 - 200 mg/l. However when a test result of 100 mg/l or
over is obtained, the following dilution technique is recommended in order to
obtain a more precise result.
1 Take a sample of pool water in a YSI Dilution Tube (PT 512), filling to the
x10 mark.
2 Make up to the 'Deionised Water' mark with deionised water, or tap water,
and mix.
3 Fill a round test tube with diluted sample to the 10 ml mark. Test as per the
earlier test procedure.
4 Multiply the displayed result by 10 to obtain the cyanuric acid concentration.
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