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9.6. METER VALIDATION & CAL CHECK ............................................................................. 31
9.7. ABSORBANCE MEASUREMENTS ................................................................................ 32
10. PROBE MODE ................................................................................................................. 33
10.1. pH MEASUREMENT ............................................................................................... 33
10.2. pH CALIBRATION ................................................................................................... 34
10.3. pH MESSAGES & WARNINGS ................................................................................. 35
10.4. pH GLP ................................................................................................................ 36
10.5. pH ELECTRODE CONDITIONING & MAINTENANCE ..................................................... 37
11. METHOD PROCEDURES ................................................................................................... 39
11.1. AMMONIA LOW RANGE .......................................................................................... 39
11.2. AMMONIA MEDIUM RANGE ................................................................................... 42
11.3. AMMONIA HIGH RANGE ........................................................................................ 45
11.4. CALCIUM .............................................................................................................. 48
11.5. IRON(II)/(III) ....................................................................................................... 51
11.6. MAGNESIUM ........................................................................................................ 55
11.7. NITRATE ............................................................................................................... 57
11.8. PHOSPHATE HIGH RANGE ...................................................................................... 60
11.9. POTASSIUM ......................................................................................................... 63
11.10. SULFATE ............................................................................................................ 66
12. WARNINGS & ERRORS .................................................................................................... 68
13. STANDARD METHODS ..................................................................................................... 71
14. ACCESSORIES ................................................................................................................. 72
14.1. REAGENT SETS...................................................................................................... 72
14.2. pH ELECTRODES ................................................................................................... 73
14.3. pH SOLUTIONS ..................................................................................................... 74
14.4. OTHER ACCESSORIES ............................................................................................ 76
CERTIFICATION ...................................................................................................................... 78
RECOMMENDATIONS FOR USERS ............................................................................................ 78
WARRANTY ........................................................................................................................... 78
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