Hanna Instruments wm 8910 User Manual

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The recorder output terminals are isolated from the controller circuitry
to avoid any interference and are user-switchable between 0 to 20
mA or 4 to 20 mA.
These controllers are housed in a rugged, modular, fiber-reinforced
polypropylene housing.
When in operation, and with the transparent cover installed, the
units comply with the IP 54 standards.
All available models can be supplied in the 110/115V ("Part No./U")
or 220/240V ("/D") version.
Six models are available:
WM 8910

a single setpoint pH controller

WM 8911

a dual setpoint pH controller, specifically designed for
all those applications in which the pH value intends to
oscillate both up and down

WM 8912

pH and ORP controller, designed for numerous

industrial applications, but in particular for swimming
pools and drinking water sanitation

WM 8913

pH and conductivity controller,     designed primarily

for agricultural applications

WM 8920

a single setpoint ORP controller

WM 8923

pH and conductivity controller     for various applica-

tions especially in water heating/conditioning systems
(where, due to evaporation, alkalinity tends to in-
crease)

WM 8930

conductivity controller, designed for industrial appli-
cations, especially water heating/conditioning systems.

Figure 1 displays the connectors for probes and electrodes, output
voltages for pumps, and input voltage for the power cord.

Fig. 1

Fig. 2

Figure 2 illustrates the arrangement of the controls and contacts on
the pH controller, WM  8911. Layouts vary from model to model
based on their features and capabilities.

Fig. 3

Figure 3 is a dimensioned, bottom view of the Wall Mounted
Controller. The modular design isolates the control circuitry from the
contacts making it possible to make the connections and then seal the
compartment. Adjustments can then be made only in the control
area, without having to open the contacts compartment and run the
risk or interfering with the connections.

Figure 4 is a dimensioned front view of the Wall Mounted Controller.
The molded, mounting holes in the corners provide quick, simple and
secure installation. No additional hardware is needed for mounting.
All electrical connections and controls are located on the front of the
instrument so that adjustment can be made without removing the
unit from the wall.

181mm

7.13"

110mm

4.33"

204mm

8.03"

164mm

6.45"

221mm

8.70"

pH

Fig. 4