This document is an instruction manual for the HI 9912 Wall Mounted Dual pH/ORP Controller. The manual provides information on the technical features of the product and instructions on how to use it.
The Hanna Instruments HI 9912 is a rugged, modular, fiber-reinforced ABS wall-mounted controller designed for process control requirements in swimming pools and water conditioning. It features two separate relays for independent pH and ORP measurements with large LCD displays.
The instrument incorporates a Consent feature where ORP adjustments occur only after pH correction to save on chemicals. It includes a triple contact alarm system, proportional controls with overdosage timers, and powered dosage terminals for both parameters.
| Range (pH/ORP) | 0.00 to 14.00 pH and 0 to 1000 mV |
|---|---|
| Resolution (pH/ORP) | 0.01 pH and 1mV |
| Accuracy (pH) | +/- 0.02 pH |
| Accuracy (ORP) | +/- 5 mV |
| Power Supply | 110/115V or 220/240V at 50/60Hz |
| Weight | 1.6 kg (3.5 lb) |
The Consent feature adjusts ORP measurements only after pH has been corrected, making pH correction the master and ORP adjustment the slave.
The instrument provides for two separate relays, one for pH and another for ORP.