HANNA BL-983318 TDS Mini Controller

OVERVIEW:

The BL983318 is a compact, panel-mounted, process controller for measuring total dissolved solids (TDS) of a process stream. The device features a large LCD with a protective cover. Users may choose from automatic or manual dosing modes. When in automatic mode the dry contact relay is activated when reading is above the set point. The relay can be used to activate a solenoid valve to open and drain a tank (i.e. boiler bleed and feed) or add fresh water until the desired set point is reached. The BL983318 uses a 0.5 conversion factor in which 1.00 mS/cm = 0.50 ppt. The BL983318 can measure TDS from 0.00 to 10.00 ppt (g/L).

Adjustable Dry Contact Dosing Relay:

The BL983318 features a dosing relay that is activated when the reading is above a user-programmable set point.

Programmable Overdose Protection:

For enhanced safety, the mini controller can be programmed to deactivate the dosing relay if the setpoint is not reached within a specified time interval. The overdosing timer is programmable from 5 to 30 minutes or disabled.

Relay Control Overide:

With the flick of a switch the mini controller's relay can be disabled (Off), placed in control (Auto), or be activated for manual operation (On) which is useful for priming a dosing pump.

Multicolor LED Indicator:

Multicolor LED indicator allows an operator to quickly check the status of the controller.

• Green = Meter in measurement mode and reading is below the set point.

• Orange/Yellow = Reading is above the set point and the relay is activated.

• Blinking Red = Indicates an alarm condition such as when the maximum dosing time has been exceeded