Product information "HI8710 pH analog Controller with Self Diagnostic"
Inputs: BNC connector, Direct wire connection with amplified probe (supports HI 1006 series probes) and 4-20 mA from a transmitter
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
Auto-diagnostic tests for pH electrode and instrument status
Operational mode LED indicators
Fail Safe Function–the alarm relay is activated at power down
Transparent splash-proof cover
HI 8710 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 HI 8720 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
The HI 8710 is supplied complete with mounting brackets and instructions.
Range 0.00 to 14.00 pH
Resolution 0.01 pH
@ 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
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 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.)