pH solutions begin on page 2.158 Specifications BL7916 Range 0.00 to 14.00 pH Resolution 0.01 pH Accuracy (@25°C/77°F) ±0.01 pH Flow Rate see table Input Impedance 1012 Ohm Dosage proportional, acid or base, user selectable Dosing Contact 1 isolated, 2A, max. 240V, resistive load, 1,000,000 strokes Alarm Contact 1 isolated, 2A, max. 240V, resistive load, 1,000,000 strokes Calibration offset: ±1 pH with trimmer; slope: 85 to 115% with trimmer Recorder Output 4-20 mA (isolated) Power Supply BL 7916-1: 115V ±15%; 50/60Hz (40W); BL 7916-2: 230V ±15%; 50/60Hz (40W) Environment 0 to 50°C (32 to 122°F); RH max 95% non-condensing Dimensions 221 x 142 x 181 mm (8.7 x 5.6 x 7.1’’) Weight 5 kg (11 lb.) Ordering Information BL7916-1 is supplied with discharge and suction valves, polyethylene tubing, 115V power cable and instructions BL7916-2 is supplied with discharge and suction valves, polyethylene tubing, 230V power cable and instructions BL7916 PRESSURE/FLOW BAR (PSI) LPH (GPH) 0.5 (7.4) 13.3 (3.46) 1.0 (14.7) 11.7 (3.04) 2.0 (29.4) 10.1 (2.63) 3.0 (44.1) 9.0 (2.33) 4.0 (58.8) 7.8 (2.03) BL7916 pH Controller and Pump • pH controller and dosing pump • ±0.01 pH accuracy • Isolated 4 to 20 mA recorder output. • Proportional dosing · Slows the pump down when the measured pH level approaches the set value, which ensures precise dosage and avoids costly waste of chemicals due to overdosage. • Alarm contact · Activated whenever the pH value varies more than 2 pH units from the set point. • Auxiliary contacts · Allow the user to attach a mixer or priming pump that is activated only when the pump is dosing. • PVDF, FPM/FKM and PTFE materials · Used for all parts that come into contact with liquid. by Hanna 15 Process Instrumentation 15.102 | www.hannainst.com controllers
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