Hanna pH Analog Controller with Dual Output and Self-Diagnostic Test - HI8711

Item #:

HI8711

Brand:

Hanna Instruments

Hanna pH Analog Controller with Dual Output and Self-Diagnostic Test - HI8711

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Description

HI8711 pH Analog Controller with Dual Output and Self-Diagnostic Test by Hanna Instruments

HI 8711 allows the selection of two set points with two independent outputs for acid and alkaline dosages. 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.

Inputs: BNC connector, Direct wire connection with amplified probe (supports HI 1006 series probes) and 4-20 mA from a transmitter
Auto-diagnostics to verify offset and slope calibration and electrode contamination/deterioration
Selectable manual ON, OFF and automatic dosing control for alkaline, acid and REDOX dosing with indicator
Dual set point with two independent dosing outputs
Extended temperature compensation range: -20 to 100�C
Supports potential matching pin connection
Both 4-20 and 0-20 mA output
�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

Order Information:

The HI 8711 is supplied with mounting brackets and instructions.

Specifications

Range	0.00 to 14.00 pH
Resolution	0.01 pH
Accuracy @ 20 °C	±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)
Setpoint Relay	2, isolated, 2 A, max 240 V, resistive load, 1000000 strokes (not fuse protected)
Setpoint Range	alk. set: from 0.00 to 14.00 pH acid set: from 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
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.)