Hanna PH Controller HI8711

This instrument allow the selection of two setpoints with two independent outputs for acid and alkaline dosages.

HI 8711 pH controllers are ideal for process control monitoring in a wide range of industrial applications.

These instruments have been edesigned with extended pH and temperature compensation ranges as well as BNC, amplified input and input from transmitter all in one instrument.

Each model accepts either a direct input from a pH or ORP electrode or from a transmitter through 4-20 mA input. The instrument also provides ±5V power output and input terminals for amplified electrodes.

Moreover, you can choose the output configuration for connecting a recorder or a PLC, between 0-20 or 4-20 mA.

The HI 8711 incorporates adjustable overtime dosing protection from 5 to 60 minutes. If dosing exceeds selected time, the alarm will be triggered and the dosing contact will deactivate. This feature can be activated or deactivated via a shorting connection on the rear panel.

• BNC, amplified input and input from transmitter in one instrument
• Dual setpoint with two independent dosing outputs
• Broader pH range: -2.00 to 16.00 pH
• Extended temperature compensation range: -0 to 100°C
• Supports potential matching pin connection
• Both 4-20 and 0-20 mA output user selectable, all in one instrument
• ±5V outputs for amplified electrodes
• Fail Safe function–the alarm relay is activated at power down
• Operational mode LED indicators
• Backlit LCD
• Transparent splash-proof cover included

Range	pH	-2.00 to 16.00 pH
Resolution		0.01 pH
Accuracy		±0.02 pH (0 to 100°C) ±0.05 pH (-20 to 0°C) ±0.5% (input transmitter)
Input		High impedance 10 ¹² Ohm; Reference and Matching pin inputs are available; 4-20 mA
Power Output		±5 Vcc; 150 mA max load for amplified electrodes
Calibration		Offset: ±2 pH with OFFSET trimmer; Slope: 80 to 110% with SLOPE trimmer
Temperature Compensation		fixed or automatic with Pt100, from -20 to 100°C (-4 to 212°F)
Recorder Output		0-20 mA or 4-20 mA (isolated)
Setpoint Relay		2, isolated, 2 A, Max 240 V, resistive load, 1000000 strokes (not fuse protected)
Setpoint Range		ALK SET: from -2.00 to 16.00 pH ACID SET: from ALK SET to 16.00 pH
Alarm Relay		1, isolated, 2 A, Max 240 V, resistive load, 1000000 strokes (not fuse protected)
Alarm Range		0.2 to 3.00 pH
Dosing Control		OFF/AUTO/ON with selection switch
Over Dosing Control		Adjustable, from 5 min to 60 min with knob or Disable by wire strap - on rear panel
Backlight		Continuous ON
Power Supply		115 or 230 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.)