Specifications BL7917 Range -999 mV to +999 mV Resolution 1 mV Accuracy (@25°C/77°F) ±5 mV Flow Rate see table Input Impedance 10¹² Ohm Dosage proportional, oxidizing or reducing, 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 Recorder Output 4-20 mA (isolated) Power Supply BL 7917-1: 115V ±15%; 50/60Hz (40W) BL 7917-2: 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 BL7917-1 is supplied with discharge and suction valves, polyethylene tubing, 115V power cable and instructions. BL7917-2 is supplied with discharge and suction valves, polyethylene tubing, 230V power cable and instructions. BL7917 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) BL7917 ORP Controller and Pump • ORP controller and dosing pumps • ±5 mV accuracy • Isolated 4 to 20 mA recorder output. • Proportional dosing · Slows the pump down when the measured ORP level approaches the set value, to avoid over dosage of oxidizing or reducing agents. • Alarm contact · Is activated whenever the ORP reading varies more than 200 mV from the setpoint. • Auxiliary contacts · Allow users to attach a mixer or priming pump that is activated only when the pump is dosing • PVDF, FPM/FKM and PTFE materials · are used for all parts that come into contact with liquid. by Hanna ORP solutions begin on page 2.170 15 Process Instrumentation 15.103 www.hannainst.com | controllers
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