YSI 9300 Photometer - Manual (Page 128)

Test Procedure
1 Fill the test tube with sample to the 10 ml mark.
2 Add one PHMB-Phot tablet crush and mix to dissolve.
3 Select Phot 52 on photometer.
4 Take photometer reading immediately in usual manner (see photometer
instructions).
5 The result is displayed as mg/l active biocide ( *all trade marks acknowledged).
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