HORIBA HU-200SS Industrial-use MLSS meter (0 ~ 20000 mg/L, including SS-90 sensor)

Measurable Range

Activated sludge (MLSS) : 0 to 20000 mg/L (MLSS)

Kaolin : 0 to 10000 mg/L (white inorganic powder)

Clay (inorganic mud) : 0 to 20000 mg/L (gray inorganic mud)

Transmission Output Setting Range

Activated sludge (MLSS) : Arbitrary setting within the range from 0 to 1000 mg/L to 0 to 20000 mg/L

Kaolin : Arbitrary setting within the range from 0 to 1000 mg/L to 0 to 10000 mg/L

Clay (inorganic mud) : Arbitrary setting within the range from 0 to 1000 mg/L to 0 to 20000 mg/L

Display Resolution

Display resolution : 1 mg/L (0 to 10000 mg/L)

Display resolution : 10 mg/L (10000 to 22000 mg/L)

Performance

Repeatability : Within a reading value ±3% or ±10 mg/L, whichever is larger (sensor connecting sludge measured value)

Transmission Output

Number of output points : 1

Output type : DC 4 mA to 20 mA, input/output insulation type

Load resistance : 900 Ω maximum

Linearity : Within ±0.08 mA (for output only)

Repeatability : Within ±0.02 mA (for output only)

Error output : With the burnout capability (3.8 mA or 21 mA)

Hold capability : Either the last value hold or the arbitrary value hold is to be selected.

Contact Output

Number of output points : 3

Output type : No-voltage contact output

Contact type : Relay contact, SPDT (1c)

Contact capacity : 250 V AC, 3 A, 30 V DC, 3 A (resistance load)

Contact Capability

R1, R2 : Selectable from upper limit alarm, lower limit alarm, transmission output hold, and cleaning output (opened at alarm operation, closed usually, closed at power-off)

FAIL : Error warning (normally closed; open when an error occurs; open when the power is turned OFF)

Description of Alarm

Setting range : MLSS concentration within the measurable range

Delay time : 0 to 600 s

Cleaning Output

Number of output points : 1

Output type : Active voltage contact output (connected supply voltage output)

Contact type : Relay contact, SPST (1a)

Contact capacity : 250 V AC, 0.5 A

Contact capability : Solenoid valve drive for cleaning

Cleaning Settings

Cleaning frequency : 0.1 h to 168.0 h

Cleaning time : 2 s to 600 s

Hold time : 2 s to 600 s

Timer accuracy : Within 2 min per month

Description of Cleaning Operation

Cleaning operation : Operation of the internal timer

Cleaning operation : Operation of the internal timer and external contact input

Cleaning operation : The internal timer is enabled only at the time of external contact input.

Cleaning trigger : One of the cleaning trigger operations is selected (the internal cleaning sequence starts when external contact input is ON for at least 2 s).

Contact Input

Number of input points : 1

Contact type : No-voltage a contact for open collector

Condition : ON resistance: 100 Ω maximum

Condition : Open-circuit voltage: 24 V DC

Condition : Short-circuit current: 12 mA DC maximum

Contact capability : Can be selected from cleaning directives and transmission hold.

Communication Capability

Type : RS-485

Signal type : Two-wire input/output insulation type (not insulated from transmission output)

Calibration

Calibration method : Zero calibration: With clean water

Calibration method : Span calibration: Concentration conversion method using coefficient input

Working curve selection : Selection of activated sludge and inorganic mud

Adjustment feature : Allows matching the instrument indicated value to a hand analyzed sludge value (Mass method).

Self-check

Sensor check error : Sensor error

Converter error : CPU abnormality, ADC abnormality, memory abnormality

Operating Conditions

Operating temperature range : −20℃ to 55℃ (without freezing)

Operating humidity range : Relative humidity: 5% to 90% (without dew condensation)

Storage temperature : −25℃ to 65℃

Power Source

Rated power supply voltage : 100 V to 240 V AC ±10%, 50/60 Hz

Power consumption : 20 VA (max)

Others

Others : A power switch for maintenance is incorporated.