Hanna Instruments pH Analog Controller

pH Analog Controller with Self-diagnostic test


The HI 8710 is a panel mounted pH Controller with self diagnostic and test. The user can set: the setpoint for acid or alkaline dosage, the tolerance of the setpoint before an alarm is activated, the dosage mode: automatic, continuous in or OFF and the over dosage control by setting the overtime dosage knob.

Key features

Backlit LCD
Operational mode LED indicators
Transparent splash-proof cover
Fail Safe Function - the alarm relay is activated at power down


Main benefits

Extended temperature compensation
range -20 to 100 °C
Supports potential matching pin connection
Auto-diagnostic tests for pH electrode and instrument status


Supplied with

Mounting brackets Instructions




Range

-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
 
1, isolated, 2 A, Max 240 V, resistive load, 1000000 strokes (not fuse protected)


Setpoint Range
 
-2.00 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


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 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.)