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The BL120 Swimming Pool Controller is a complete system designed for maintaining swimming pool, hot tub, and spa disinfection water quality. The BL120 is available in two configurations. The basic version is the in-line model which allows for direct installation of probe and chemical injection fittings into existing piping. The other version is a panel mounted version with a bypass flow cell. The bypass flow cell allows for calibration and maintenance of the probe without having to shut down the recirculation pump. Additional features of the BL120 include LED indicators for dosing, meter status and service, real-time graph display, programmable alarms, and password protection.
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The controller is available in one of two configurations: an in-line model which allows for direct installation of the probe and chemical injection fittings into existing piping (BL120-10) or a panel mounted system with a bypass flow cell (BL120-20). The bypass flow cell allows for calibration and maintenance of the probe without having to stop the recirculation pump.
The HI1036-1802 is a digital probe that measures pH, ORP, and temperature. This probe also incorporates a potential matching pin. The pin is considered the “earth ground” connection and is used to prevent ground loop effects from causing erratic readings and damage to the system.
The BL120 is equipped with two peristaltic dosing pumps with replaceable chemical resistant tubing. When using a diaphragm pump, chlorine gas formed from outgassing can collect in the pump head resulting in the pump losing its prime; the buildup of chlorine gas is not a problem with peristaltic pumps that use rollers and tubing.
The BL120 features proportionally controlled dosing pumps. Based on the sensitivity of the process to chemical addition, these controllers allow the user to adjust a proportional band. This setting determines the amount of time that the pumps are dosing as a percentage of the deviation from the set point allowing for very fine control in maintaining the desired set point.
The flow rate from the dosing pumps is adjustable from 0.5 to 3.5L/h. Larger bodies of water require more chemical to be dosed than small bodies since it takes more chemical to realize a change in the reading. The adjustable flow rate, like the proportional band, allows for better control in maintaining a desired set point.
With chlorine disinfection there is an inverse relationship between pH and ORP. As the pH level increases, the ORP level decreases. The BL120 utilizes a dosing consent feature that will not dose chlorine until the pH value is first corrected since it is possible to have a low ORP value even though there is sufficient chlorine. The dosing consent feature prevents wastage of chemicals and avoids a higher than necessary chlorine concentration.
The flow rate from the dosing pumps is adjustable from 0.5 to 3.5L/h. Larger bodies of water require more chemical to be dosed than small bodies since it takes more chemical to realize a change in the reading. The adjustable flow rate, like the proportional band, allows for better control in maintaining a desired set point.
With chlorine disinfection there is an inverse relationship between pH and ORP. As the pH level increases, the ORP level decreases. The BL120 utilizes a dosing consent feature that will not dose chlorine until the pH value is first corrected since it is possible to have a low ORP value even though there is sufficient chlorine. The dosing consent feature prevents wastage of chemicals and avoids a higher than necessary chlorine concentration.
The versatile display of the BL120 allows for three screen modes. The LCD can display all three parameters at one time, a 3-second cycle of single parameters, or a real-time plot screen with options for parameter selection, zooming, and log recall.
The BL120 offers multiple LED indicators for status, servicing, and pump operation. The STATUS LED changes color based on operational state; green when setting are in range, yellow when user intervention is required, and red for problems. The SERVICE LED indicates any alarms and process errors experienced by the controller.
The readings for each parameter are automatically logged every 10 seconds. A new log is started each time the instrument is calibrated or at the start of a new day. Logged data include pH, ORP, and temperature values, last calibration data, setup configuration, and any event data. Each log is saved as a .csv file for easy transfer.
For review and storage the users can easily transfer data to a PC using a flash drive and the USB port.
Hanna’s BL120 controller features a password protection solution that offers restricted access to calibration, setup, and review of logged data. The password can be set and enabled/disabled during general setup of the instrument.
For review and storage the users can easily transfer data to a PC using a flash drive and the USB port.
Hanna’s BL120 controller features a password protection solution that offers restricted access to calibration, setup, and review of logged data. The password can be set and enabled/disabled during general setup of the instrument.
pH Range | 0.00 to 14.00 pH |
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pH Resolution | 0.01 pH |
pH Accuracy | ±0.05 pH |
pH Calibration | pH buffer calibration: automatic, two-point (4.01, 7.01, 10.01 pH) pH process calibration: one-point, manual input |
Temperature Compensation | automatic, -5.0 to 105.0ºC (23.0 to 221.0ºF) for pH |
ORP Range | ±2000 mV |
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ORP Resolution | 1 mV |
ORP Accuracy | ±5 mV |
ORP Calibration | ORP (mV) calibration: one-point, manual input |
Temperature Range | -5.0 to 105.0ºC (23.0 to 221.0°F) |
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Temperature Resolution | 0.1°C (0.1ºF) |
Temperature Accuracy | ±1ºC (±1.8ºF) |
pH Dosing | proportional with adjustable set point and proportional band delay to start at power-on and overdosing protection |
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ORP Dosing | proportional with adjustable set point and proportional band delay to start at power-on and overdosing protection pH dosing interlocked |
Alarms | high and low with enable/disable option for all parameters alarm is triggered when 5 consecutive readings are over/under threshold |
Alarm System | intuitive alert system based on LEDs alarm filtering options alarm relay control based on user setup |
Alarm Relay Output (1) | SPDT 5A/230 VAC activated by pH/ORP/temperature selectable alarm conditions |
Auxiliary Inputs (3) | low level in acid/base tank (contact open) low level in chlorine tank (contact open) hold input (contact open) |
Pump Control | automatic and manual modes adjustable flow rate from 0.5 to 3.5 L/h |
Log Feature | automatic logging of pH, ORP, and temperature measurements, GLP and events including alarms, errors and power failure capacity for 60 days with 10 second sampling interval all data .csv files are transferred by USB flash drive |
Password Protection | setup, calibration and log recall options features are password protected |
Storage Interface | USB |
GLP | calibration information including date and time for pH and ORP sensors |
Digital Probe Input (1) | galvanic isolated digital input HI1036-1802 pH/ORP/temperature/matching pin combined probe with DIN waterproof connector |
Power Supply | 100 – 240 VAC |
Power Consumption | 10 VA |
Environment | 0 to 50 ºC (32-122 ºF); max 95% RH non-condensing |
Dimensions | 245 x 188 x 55 mm (73 mm with pumps); 9.6 x 7.4 x 2.2” (2.9” with pumps) |
Weight | 1700 g (60 oz) |
Ordering Information | BL120-10: Swimming Pool & Spa Controller with HI1036-1802 combined pH/ORP/temperature digital electrode, with probe fittings and chemical injectors BL120-20: Swimming Pool & Spa Controller with panel mounted flow cell, HI1036-1802 combined pH/ORP/temperature digital electrode, with probe fittings and chemical injectors |
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Hanna Service d.o.o. — Sermin 75H, Bertoki — 6000 Koper (Slovenia) — VAT ID SI92346669
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