Wall-Mount, Dual Setpoint Proportional pH Control- Dual setpoint for proportional dosage of acid or alkaline solutions
- User selectable isolated output
- Dual alarm system
HI 9911 is a pH controller with two setpoints for proportional dosage of acidic and alkaline solutions. Through two sets of coarse and fine trimmers, the setpoints can be accurately fine tuned to any value in the 0.00 to 14.00 range. Likewise, two trimmers on the front panel make for easy calibration. HI 9911 accepts any pH electrode ending in a BNC connector. The proportional control can be adjusted to match your application through the time cycle from 0 to 90 seconds and the proportional band of 0 to 2 pH. Two pumps or valves can be wired directly to the controller and be powered through the terminals. HI 9911 is a pH controller with two setpoints for proportional dosage of acidic and alkaline solutions. Through two sets of coarse and fine trimmers, the setpoints can be accurately fine tuned to any value in the 0.00 to 14.00 range. Likewise, two trimmers on the front panel allow for easy calibration. HI 9911 accepts any pH electrode ending in a BNC connector. The proportional control can be adjusted to match your application through the time cycle from 0 to 90 seconds and the proportional band of 0 to 2 pH. Two pumps or valves can be wired directly to the controller and be powered through the terminals. HI 9911 provides for two types of alarms. The alarm relay is activated when the measurements are away from the setpoints by more than a pre determined value in the 0.5 to 2.5 pH range. Or alternatively, when one of the two independently adjustable maximum dosing times is exceeded. The alarm can be configured in either normally-closed or normally-open state and turned off during maintenance. HI 9911 also provides for a user selectable 0-20 or 4-20 mA isolated recorder output. You can choose from manual or automatic temperature compensation with an optional 3-wire Pt100 probe. HI 9911 comes with extractable terminal modules. Once wired, the compartment containing the connections is closed behind a fire-retardant ABS removable panel. As with HI 9910, a ground probe can be hooked up to the controller to eliminate interference.
HI 9911 is supplied complete with instructions. |
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