Hanna Wall Mounted pH Controller with Single Set Point and Proportional Dosage
The Hanna Wall Mounted pH Controller has an adjustable proportional band from 0.0 to 2.0 pH!
Item #: W505-9910
Manufacturer: Hanna Instruments Manufacturer Item #: HI9910-1
Call for availability 1-800-334-9291.
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The Hanna Wall Mounted pH Controller has a single set point for proportional dosage of acid or alkaline solutions. Any pH electrode ending in a BNC connector can be directly attached to the controller. The proportional control can be fine tuned through two dials on the front panel. The time cycle is adjustable from 0 to 90 seconds and the proportional band from 0.0 to 2.0 pH. Coarse and fine, as well as offset and slope trimmers make accurate setting and calibration easy and convenient. A pump or electro-valve can be wired directly to the controller and be powered through the terminals.
The Hannah Wall Mounted pH Controller also provides for an alarm relay. The alarm is activated when the measurements stray away from the set point by a predetermined value in the 0.5 to 2.5 pH range. A max. dosing time from 1 to 10 minutes can also be set, after which the alarm is activated to warn of an abnormality. The alarm can be configured in either normally-closed or normally-opened state. It also provides an isolated output signal which is user selectable between 0-20 and 4-20 mA. A dial on the front panel renders manual temperature compensation fast and easy.
For automatic compensation, hook up a 3 wire Pt100 to the controller. To speed up wiring, it includes extractable terminal modules. Once wired up, the compartment containing the connections is protected behind a fire-retardant ABS panel. Several LEDs show whether the set point or alarm relays are activated from a distance.
Features:
Single set point for proportional dosage of acid or alkaline solutions
Adjustable time cycle from 0 to 90 seconds
Adjustable proportional band from 0.0 to 2.0 pH
Coarse and fine as well as offset and slope trimmers
Alarm configurable in either normally-closed or normally-opened state
Extractable terminal modules
LED lights
Spec Summary:
Range:
0.00 to 14.00 pH
Resolution:
0.01 pH
Accuracy:
±0.02 pH
Input Impedance:
1012 Ohm
Calibration:
manual, 2 point, through trimmers on the front panel
Temperature Compensation:
Automatic from 0 to 50°C with Pt100 probe or manual from -10 to 80°C
Set Point:
selectable from 0.00 to 14.00 pH
Recorder Output:
selectable at 0-20 mA or 4-20 mA (isolated)
Proportional Control:
adjustable from 0.0 to 2.0 pH and time cycle from 0 to 90 seconds
Dosing Contact:
1 powered terminal for pH correction (115 or 240 V) Max. 2A, 1,000,000 strokes;
activated when pH > setpoint for acid dosage or when pH < setpoint for alkaline dosage
Alarm Relay:
1 activated when pH varies more than a selectable value (0.5 to 2.5 pH) from setpoint
or when max dosage time (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
