This manual provides detailed instructions on how to use the Hanna HI 9931 and HI 9934 wall mounted conductivity and TDS controllers.
The Hanna Instruments HI 9931 and HI 9934 are wall-mounted controllers designed for process control in horticultural, hydroponics, and agricultural applications. These instruments feature proportional control and operate with optional Hanna 4-ring probes that include a built-in temperature sensor for automatic temperature compensation. The controllers display accurate measurements on a large LCD and utilize a triple contact alarm system to trigger external devices like buzzers or lights based on conductivity levels or overdosage conditions.
The manual covers the complete lifecycle of the instrument, from preliminary examination and mechanical layout to normal operation, calibration, and maintenance. It details the functional diagrams for both models, connection wiring, and the adjustment of setpoints and proportional control parameters. Additionally, it includes specifications for the power supply, environmental operating conditions, and physical dimensions, along with a CE Declaration of Conformity.
| Operating Temperature | -10 to 50°C |
|---|---|
| Weight | 1.8 Kg |
| Enclosure Dimensions | 181x221 x 142mm |
No, the instrument should never be installed outdoors, in a wet or humid area, or under direct sunlight.
The controllers operate with the optional Hanna 4-ring probes which incorporate a temperature sensor.