pH solutions begin on page 2.158 Specifications HI8710 Range 0.00 to 14.00 pH Resolution 0.01 pH Accuracy (@25°C/77°F) ±0.02 pH (0 to 100 °C); ±0.05 pH (-20 to 0 °C); ±0.5% (input from transmitter) Input high impedance 10¹² 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) Set Point Relay 1, isolated, 2 A, max 240 V, resistive load, 1000000 strokes (not fuse protected) Set Point Range 0.00 to 14.00 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 Consent Relay 1, isolated, 2 A, max 240 V, resistive load, 1000000 strokes (not fuse protected) 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 VAC ±10% or 230 VAC ±10%; 50/60 Hz Enclosure flame retardant ABS body and front panel; 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.) Ordering Information The HI8710 is supplied complete with mounting brackets and instructions. Accessories HI8427 pH / ORP electrode simulator HI931001 pH / ORP electrode simulator with display HI8614N pH transmitter HI8614LN pH transmitter with display HI8710 pH Analog Controller with Self-Diagnostic Test • 0.2 to 3.00 pH alarm tolerance range • Automatic temperature compensation • Backlit, LCD display • Removable, transparent splash-proof cover protects the front panel. HI8710 is a panel mounted pH controller with self-diagnostic test capabilities. Users can set: the setpoint for acid or alkaline dosage, the tolerance of the setpoint before an alarm is activated, the dosage mode: automatic, continuous on or OFF and the over dosage control by setting the overtime dosage knob. When used in conjunction with the HI8720 ORP controller, the ODCD* function will ensure that the ORP dosage will start only when the pH level is correct. “Overtime dosage” function with selection knob and jumper for disable on the rear panel. If the dosing relay remains continuously activated for more than selected dosing time the alarm relay is activated, the alarm LED is blinking and the dosing relay is deactivated. * ORP dosing consent device 1. BNC socket for pH electrode 2. Input from amplified electrode 3. Connections for Pt100 temperature sensor 4. Connections for dosing pump 5. Reduc/Oxid dosage consent terminals 6. Alarm contacts 7. Power supply terminals 8. Fuse holder 9. Acid/Alkaline dosage selection terminals 10. Recorder output contacts 11. Connection to the transmitter 12. Power for amplified electrode 13. Connection for matching pin 14. Connection for reference electrode 15. Disable overtime connection 16. Overtime set knob (about 5 to 60 min) 15 Process Instrumentation 15.75 www.hannainst.com | controllers
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