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Hach DR/890 Colorimeter as the most capable of all the DR/800 Portable Colorimeter Fracturing Procedures Water Analysis Handbook for use with DR 900 Multi parameter handheld water testing with over 90 colorimetric parameters for use in the most demanding field environments. The DR900 is a fantastic choice 3.2.6.1 Using the Timer in Manual Mode. Manual for operational and/or safety information. The Hach DR/800 Series Colorimeter shown in Figure 1 is a.Apparatus and the Hach Distillation Apparatus is included. DR/890. They are marked with 10-, 20- and 25-mL fill lines which may. Hach DR300 Pdf User Manuals. View online or download Hach DR300 User Manual.