Key facts
- Brand
- Hanna Instruments
- Model
- HI 9912
- Documents
- 2
- Languages
- EN
- Last added
- 2012-07-10
Start here
Hanna Instruments HI 9912 Wall Mounted Dual pH/ORP Controller Instruction Manual
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.
Hanna Instruments HI 9912 specifications
| 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) |
Source: Hanna Instruments HI 9912 Wall Mounted Dual pH/ORP Controller Instruction Manual
All Hanna Instruments HI 9912 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
What is included in the HI 99121 test kit?
The kit includes a portable pH meter, a pH electrode, pH 4.01 & pH 7.01 buffer solutions, cleaning solutions, a soil preparation solution, a ground auger, batteries, and an instruction manual.
From: Hanna Instruments HI 99121 Soil pH Test Kit Instruction Manual
What is the preferred pH range for most plants?
Most plants prefer a pH range from 5.5 to 7.5 for optimum growth.
From: Hanna Instruments HI 99121 Soil pH Test Kit Instruction Manual
What is the Consent feature on the HI 9912?
The Consent feature adjusts ORP measurements only after pH has been corrected, making pH correction the master and ORP adjustment the slave.
From: Hanna Instruments HI 9912 Wall Mounted Dual pH/ORP Controller Instruction Manual
How many relays does the HI 9912 have?
The instrument provides for two separate relays, one for pH and another for ORP.
From: Hanna Instruments HI 9912 Wall Mounted Dual pH/ORP Controller Instruction Manual