HI-9912-2 Proportional pH and ORP Control information
Hanna's extended description
Industrial grade pH & ORP controller
The HI-9912 is a pH and ORP controller specially designed for pool sanitisation.
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 minimising 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 electro valves 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 changeable in a normally-closed or a normally-open state and can be turned off during maintenance. A pool's status can be ascertained from a distance through dosage and alarm LEDs.
Supplied with
- Instructions
BNC Connection – BNC is one of the most commonly used connector types in pH meters and electrodes. Compatible with any meter or electrode that uses BNC connectors.
Mains powered - All mains operated equipment is compatible with UK AC voltage and frequency – 230V, 50Hz.
Specifications
Specifications list
Specifications
| Range - pH | 0.00 to 14.0 pH | |
| Range - mV | 0 to 1000 mV | |
| Resolution - pH | 0.01 pH | |
| Resolution - mV | 1 mV | |
| Accuracy - pH | ±0.02 pH | |
| Accuracy - mV | ±5 mV | |
| Input Impedance | 1012 Ohm | |
| Calibration | manual, 2 point for pH and 1 point for ORP through trimmers on the front panel | |
| Setpoint | 2, selectable from 6.00 to 8.00 pH and from 500 to 900 mV | |
| Proportional Control | adjustable from 0 to 2 pH and from 0 to 200 mV, time cycles from 0 to 90 seconds | |
| Dosing Contact | 2 powered terminal for pH and ORP correction (115 or 240 V) Max. 2A, 1,000,000 strokes; pH dosage: activated when pH > setpoint; ORP dosage: activated when mV reading < setpoint |
|
| Alarm Relay | 1, activity when pH varies more than selectable value (0.5 to 2.5 pH) from setpoint or when max dosage time for pH (adjustable from 1 to 10 minutes) elapses; or activated when mV reading varies more than a selectable value (50 to 250 mV) from setpoint or when max dosage time for ORP (adjustable from 1 to 10 minutes) elapses (isolated, Max 2A-240 V, resistive load, 1,000,000 strokes) |
|
| Power Supply | 110/115 Vac ±10% or 220/240 Vac ±10%; 50/60 Hz | |
| Environment | -10 to 50° (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.) |
Downloadable Manuals
Manuals
manHI_9912.pdfQuestions & Answers
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