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ANALOG PROCESS CONTROLLERS

Industrial Catalog - 9073 HI 8720 ORP Controller

SPECIFICATIONS

Range -1000 to +1000 mV Resolution 1 mV Accuracy (@20°C/68°F) HI8720E: ±5 mV HI 8720T: ±0.5% Input HI8720E: high impedance 10
12 Ohm HI8720T: 4-20 mA Calibration slope: 90 to 110% with trimmer Recorder Output 0-20 mA or 4-20 mA (isolated) Setpoint Relay 1, isolated, 2A, Max. 240 V, resistive load, 1,000,000 strokes Alarm Relay 1, isolated, 2A, Max. 240 V, resistive load, 1,000,000 strokes Power Supply 115/230 ±10% VAC; 50/60 Hz Enclosure black anodized aluminum body; front and back with ABS; transparent splash-proof front cover Environment -10 to 50°C (14 to 122°F); RH max 95% non-condensing Panel Cutout 141 x 69 mm (5.6 x 2.7’’) Weight 1 kg (2.2 lb.)

Single setpoint with selection of reducing or oxidizing dosage Automatic diagnostic controls User-selectable alarm band Use in conjunction with HI 8710 for ORP dosageat correct pH levels Two models to accept direct input from electrode or transmitter Operational mode LED indicators

This instrument allows the selection of a setpoint for oxidizing or reducing dosage. It isprovided with self-diagnostic feature to control the calibration at 0 and 500 mV. The user canalso set the tolerance of the setpoint (10 to 200 mV), before an alarm is activated. When used in conjunction with the HI 8710 pH controller, the ODCD* function (featured by the HI 8710) will ensure that the ORP dosage will start only when the pH level is correct. Two differentmodels are available to accept either a direct input from an ORP electrode (E version) or froma transmitter through 4-20 mA input (T version). The output configuration for connecting a recorder or a PLC can be chosen between 0-20 or 4-20 mA.The front panel is protected behind a transparent splash-proof cover. * ORP Dosing Consent Device

ORDERING INFORMATION: ACCESSORIES:

The HI 8720 series is supplied complete withmounting brackets and instructions. HI 7020L 200-275 mV test solution,500 mL bottle HI 8720E020 with 0-20 mA recorder output Input from electrode HI 8720E420 with 4-20 mA recorder output HI 7091L Reducing solution, 500 mL bottle Input from transmitter HI 7092L Oxidizing solution, 500 mL bottle HI 8720T020 with 0-20 mA recorder output HI 8427 pH / ORP electrode simulator HI 8720T420 with 4-20 mA recorder output HI 931001 pH / ORP electrode simulatorwith display HI 8720T only HI 8615 ORP transmitter HI 8615L ORP transmitter with display
For a complete range of ORPelectrodes, see pages 63-71

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