7
SPECIFICA
TIONS
4. SPECIFICATIONS
4.1. COMPARISON TABLE FOR BL12X SWIMMING POOL CONTROLLERS
pH measurement
ORP measurement
Acid dosing pump
Chlorine dosing pump
Analog outputs
Hanna Cloud connectivity
BL120
BL121
BL122
BL123
4.2. TECHNICAL SPECIFICATIONS OF BL120, BL121 & BL122, BL123
Range
0.00 to 14.00 pH
±2000 mV
-5.0 to 105.0 ºC (23.0 to 221.0 °F)*
Resolution
0.01 pH
1 mV
0.1 °C (0.1 ºF)
Accuracy
@25 °C / 77 °F
±0.05 pH
±5 mV
±1.0 ºC (±1.8 ºF)
Calibration
• pH buffer calibration: automatic, two points (4.01, 7.01, 10.01 pH)
• pH process calibration: adjustable, single point
• ORP (mV) calibration: adjustable, single point
Temperature compensation
• Automatic -5.0 to 105.0 ºC (23.0 to 221.0 ºF) for pH
pH Controller
• Proportional feed using adjustable set point and adjustable proportional band
• Delay to start at power-on
• Overdosing protection using overfeed safety timer
ORP Controller
• Proportional feed using adjustable set point and adjustable proportional band
• Delay to start at power-on
• Overdosing protection using overfeed safety timer
• pH regulator interlocked
Alarms
• High and Low with enable / disable option for all parameters
• Alarm is triggered after five consecutive readings over / under threshold
*The range (pH & temperature) may be limited by the probe’s limits.