Hanna Instruments (M) Sdn Bhd
11A, Jalan PJS 11/20,
Bandar Sunway,
46150 Petaling Jaya,
Selangor, Malaysia.
11A, Jalan PJS 11/20,
Bandar Sunway,
46150 Petaling Jaya,
Selangor, Malaysia.
+603-5638 9940
Penang Branch Office
Hanna Instruments (M) Sdn Bhd
N0. 303-2-27, Krystal Point,
Jalan Sultan Azlan Shah,
11900 Sungai Nibong,
Penang, Malaysia.
+604-638 4558
+604-645 4558
penang@hannamalaysia.com
Sabah Branch Office
Hanna Instruments (M) Sdn Bhd
No. 4-1, 1st Floor,
Plaza Kingfisher,
Jalan Plaza Kingfisher 5,
Inanam, 88450 Kota Kinabalu,
Sabah, East Malaysia.
088-382 941
088-382 942
sabah@hannamalaysia.com
Hanna Instruments (M) Sdn Bhd
N0. 303-2-27, Krystal Point,
Jalan Sultan Azlan Shah,
11900 Sungai Nibong,
Penang, Malaysia.
+604-638 4558
+604-645 4558
penang@hannamalaysia.com
Sabah Branch Office
Hanna Instruments (M) Sdn Bhd
No. 4-1, 1st Floor,
Plaza Kingfisher,
Jalan Plaza Kingfisher 5,
Inanam, 88450 Kota Kinabalu,
Sabah, East Malaysia.
088-382 941
088-382 942
sabah@hannamalaysia.com
HI8711 pH Analog Controller with Dual Output and Self-Diagnostic Test
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1.5 kg
HI8711 allows the selection of two set points with two independent outputsfor acid and alkaline dosages.
- Auto-diagnostics to verify offset and slope calibration and electrode contamination/deterioration
- Fail Safe Alarm System protects against problems caused by power supply failure or signal interruption
- Selectable manual ON, OFF and automatic dosing control for alkaline and acid dosing with indicator.
Fail Safe Alarm System
- Hanna’s exclusive Fail Safe Alarm System protects against problems caused by power supply failure or signal interruption, which are typical risks in industrial environments. An alarm condition is indicated by a red LED, located directly on the front panel of the controller.
Self-Diagnostic Test
- Built-in autodiagnostic functions enable the user to check and troubleshoot any malfunctions. The functions are made via front panel keys to isolate the cause of malfunction whether it is due to pH electrode contamination, internal offset circuit or the amplifier circuit.
Overtime Dosing Protection
- The HI8711 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.
Matching Pin Connection
- Supports potential matching pin connection to avoid typical problems caused by grounding loop current, such as progressive damage of the electrode, fluctuating measurements, and poor process regulation.
Output and Input Connections
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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.
Robust Design- A removable, transparent splash-proof cover protects the front panel.
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pH
pH Range 0.00 to 14.00 pH pH Resolution 0.01 pH pH Accuracy ±0.02 pH (0 to 100 °C); ±0.05 pH (-20 to 0 °C); ±0.5% (input from transmitter) pH Calibration offset: ±2 pH with OFFSET trimmer; slope: 80 to 110% with SLOPE trimmer pH Temperature Compensation fixed or automatic with Pt100, from -20 to 100°C (-4 to 212°F) pH Input impedence high impedance 10¹² Ohm; reference and matching pin inputs are available; 4-20 mA Process Control Meter
Alarm Relay Set Point 1, isolated, 2 A, max 240 V, resistive load, 1000000 strokes (not fuse protected) Alarm Relay 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 Voltage Output ±5 Vcc; 150 mA max load for amplified electrodes Enclosure flame retardant ABS body and front panel; transparent splash-proof front cover Panel Cutout 141 x 69 mm (5.6 x 2.7’’) Recorder Output 0-20 mA or 4-20 mA (isolated) Set Point 2, isolated, 2 A, max 240 V, resistive load, 1000000 strokes (not fuse protected); range: alk. set: from 0.00 to 14.00 pH; acid set: from 0.00 to 14.00 pH Power Supply 230 VAC ±10%; 50/60 Hz Environment -10 to 50°C (14 to 122°F); RH max 95% non-condensing Weight 1 kg (2.2 lb.) Ordering Information The HI8711 is supplied complete with mounting brackets and instructions.