อุปกรณ์วัด Control System (Industrial Grade pH & ORP Controller)

HI 9912

Industrial Grade pH & ORP Controller

HI 9912 is a pH and ORP controller specially designed for pool sanitization.

Two separate set points can be adjusted by the user from 6 to 8 pH and 500 to 900 mV. The relays are activated when the pH exceeds or the mV falls below the relevant set point. HI 9912 accepts any pH and ORP electrode ending in a universal BNC connector. Two independent terminals provide for pH and ORP matching pin/ ground probes to extend electrode life and eliminate interference.

HANNA’s proportional control allows considerable savings by minimizing the use of chemicals. The settings are made through independent time cycles adjustable from 0 to 90 seconds and two proportional bands from 0 to 200 mV and 0 to 2 pH. Two pumps or electrovalves can be wired directly to the controller and be powered through the terminal.

The HI 9912’s alarm is activated when measurements exceed the operator-adjustable thresholds of 50 to 250 mV or 0.5 to 2.5 pH. Should the two max dosing periods of 1 to 10 minutes be exceeded an alarm is activated to signal the abnormality. The alarm is alterable in a normally-closed or a normally-open state and can be turned off during maintenance. A pools status can be ascertained from a distance through dosage and alarm LED’s.

HI 9912 comes with extractable terminal modules for quicker and safer wiring. The wiring compartment is protected behind a fire-retardant ABS removable panel.

Specifications

Range pH 0.00 to 14.00 pH
ORP 0 to 1000 mV
Resolution pH 0.01 pH
ORP 1 mV
Accuracy @ 20°C pH ±0.02 pH
ORP ±5 mV
Input Impedance  1012 Ohm
Calibration  manual, two points for pH and 1 point for ORP, through trimmers on the front panel
Setpoint  two, selectable from 6.00 to 8.00 pH and from 500 to 900 mV
Proportional Control  two independent controls: pH from 0.0 to 2.0 and ORP from 0 to 200 mV with two separate time cycle from 0 to 90 seconds
Alarm Contact  relay can be configured as normally open or normally closed (isolated output max. 2A, max. 240V, resistive load, 1,000,000 strokes). The alarm is activated if pH varies by more than the user selectable interval (0 to 2 pH), and/or ORP varies by more than the user selectable interval (0 to 200 mV) from the set points or due to overdosage
Dosing Terminals  two sets of independent terminals (115 to 240V, max.2A, 1,000,000 strokes) are activated whenever pH exceeds the pH set point or when ORP falls below the mV set point
Power Supply  ±10% 115 VAC or 230 VAC; 50/60 Hz
Environment  -10 to 50°C (14 to 122°F); RH max 95% non-condensing
Dimensions  221 x 181 x 86 mm (8.7 x 7.1 x 3.4’’)
Weight  1.6 kg (3.5 lb.)

Accessories

Solutions
HI 7004/1L  4.01 pH Buffer Solution
1 x 1 L bottle
HI 7007/1L  7.01 pH Buffer Solution
1 x 1 L bottle
HI 7010/1L  10.01 pH Buffer Solution
1 x 1 L bottle
HI 7020L  ORP Test Solution at 200/275 mV (@20°C)
1 x 500 mL bottle
HI 7021L  ORP Test Solution at (240 mV @ 25°C/77°F)
1 x 500 mL bottle
HI 7022L  ORP Test Solution at 470 mV @ 25°C/77°F)
1 x 500 mL bottle