The BL983321 is a compact, panel mounted, process controller for measuring total dissolved solids (TDS) of a process stream that is within the 0.00 to 19.99 ppm (mg/L) range. The device features a large LCD with protective cover. Users may choose from automatic or manual dosing modes. When in automatic mode the dry contact relay is activated when a reading is above the set point. The relay can be used to activate a solenoid that switches from one DI (deionized) tank to another or to open a valve that will allow lower TDS water to flow into a tank being monitored in order to lower its TDS. The BL983321 can also be used to monitor the quality of water produced from ion exchange, reverse osmosis (RO) or distillation. *The BL983321 uses a 0.5 conversion factor in which 1.00 μS/cm = 0.50 ppm.
The BL983321 features a dosing relay that is activated when the reading is above a user programmable set point.
For enhanced safety the mini controller can be programmed to deactivate the dosing relay if the set point is not reached within a specified time interval. The overdosing timer is programmable from 5 to 30 minutes or disabled.
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 allows an operator to quickly check the status of the controller.
The relay dosing contact is rated for up to a 2A load and is fuse protected.
Quick-connect terminal blocks are clearly labeled for easy connection to power, conductivity probe and relay that can be used to operate a dosing pump, valve, audible alarm, or light.
The BL983321 mini controller uses the HI7634-00 conductivity probe that is available with different cable lengths.
*HI7634-00 is not included and must be ordered separately
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Front ViewInstallation cut-out dimensions are provided as well as outside panel dimensions. | Side ViewAdjustable location brackets allow the controller to slide easily and securely into place. |
Specification | Detail |
---|---|
SKU | BL983321 |
TDS Range | 0.00 to 19.99 mg/L (ppm) |
TDS Resolution | 0.01 mg/L (ppm) |
TDS Accuracy (@25°C/77°F) | ±2% F.S. |
TDS Conversion Factor | 0.5 |
Temperature Compensation | automatic from 5 to 50°C (41 to 122°F) with ß =2%/ºC |
Calibration | manual, with CAL trimmer |
Dosing Relay | maximum 2A (fuse protected), 250 Vac, 30 VDC Contact close when measure: > setpoint |
Overtime | adjustable, typically from 5 to approximately 30 minutes |
Power Supply | models '-0': 12 VDC adapter (included) models '-1': 115/230 VAC 50/60Hz |
Dimensions | 83 x 53 x 99 mm (3.3 x 2.1 x 3.9') |
Weight | models '-0': 200 g (7.1 oz.) models '-1': 300 g (10.6 oz.) |
Ordering Information | Supplied with mounting brackets, transparent cover and instruction manual. |
Recommended Probe | HI7634-00 EC/TDS probe with internal temperature sensor and 2 m (6.6') cable (not included). |