HU-200SS

Field-installation type MLSS meter

Ideal for measuring samples with high turbidity

An MLSS meter that is ideal for measuring samples with high turbidity. The sensor is designed for stable measurements and ease of maintenance. Furthermore, when combined with an ultrasonic cleaner, issues are minimized facilitating ease of maintenance.

Abteilung: Process Water
Produktionsfirma: HORIBA Advanced Techno Co., Ltd.

Stable measurement

This sensor features a long-life LED light source.  Automatically compensating for fluctuations in light intensity through a built-in reference light monitor.

Designed for ease of maintenance

Using a transmitted light type sensor that does not require span calibration.  Additionally, the sensor head is made of PFA resin in order to prevent contamination.

Combined with an ultrasonic cleaner

The ultrasonic cleaner has no moving parts (wipers), making it less prone to trouble, eliminating the need for periodic replacements.  Furthermore, it features a burst oscillation and sweep function, enhancing cleaning power.

Converter

Product name Industrial-use MLSS meter
Converter type HU-200SS industrial-use MLSS converter
Detector type SS-90 MLSS detector for industrial use
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 1 mg/L (0 to 10000mg/L)
10 mg/L (10000 to 22000mg/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 ±0.08mA (for output only)
Repeatability Within ±0.02mA (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
  • Setmting 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
Setting 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
  • Operation of the internal timer
  • Operation of the internal timer and external contact input
  • The internal timer is enabled only at the time of external contact input.
  • 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
Open-circuit voltage: 24 V DC
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
  • Span calibration: Concentration conversion method using coefficient input
  • Working curve selection: (selection of activated sludge and inorganic mud)
There is a feature that allows you to match an instrument indicated value to a hand analyzed value of sludge (by the Mass method).
Self-check Sensor check error Sensor error
Converter error CPU abnormality, ADC abnormality, memory abnormality
Operating
temperature range
−20℃ to 55℃ (without freezing)
Operating humidity
range
Relative humidity: 5% to 90% (without due condensation)
Storage
temperature
−25℃ to 65℃
Power source Rated power supply
voltage
100 V to 240 V AC ±10% 50/60Hz
Power consumption 20 V A (max)
Others A power switch for maintenance is incorporated.
Compatible
standards
CE marking EMC   : EN61326-1
     Class A, Industrial electromagnetic environment
Safety : EN61010-1
RoHS  : EN50581
     9. Industrial monitoring and control instruments
FCC rules Part15 Class A
Structure Installation Outdoor installation type
Installation method 50 A pole-mounted or wall-mounted
Protection class IP65
Material of case Aluminum alloy (coated with epoxy modified melamine resin)
Material of mounting
brackets
SUS304
Material of hood SUS304 (epoxy glue degeneration melamine resin painting)
Material of display window Polycarbonate
Display element Reflective monochrome LCD
External
dimensions
180 (W) mm × 155 (H) mm × 115 (D) mm (excluding brackets)
Mass Mainframe: approx. 3.5 kg, hood, bracket: approx. 1 kg

*1:  The surge test specified in the EMC Directive for CE Marking shall not apply to the case when a sensor cable, transmission cable, or contact input cable is extended for 30 m or longer.

*2:  An arrester (electric discharge voltage: 400 V) is provided for transmission output, contact input, and communications. However, incorporate and use an optimal surge absorption element on the connected line according to the ambient environment, equipment installation situations, and externally connected equipment, etc.

Detector

Product name MLSS detector for industrial use
Model SS-90
Measuring principle Light transmission method
Light source Infrared LED, 880 nm, approx. 10 Hz, AC blinking
Detector (transmitted light/reference light)
Cell length Approx. 7 mm
Data transfer RS-485 (communication with the converter)
Self-check Water immersion detection
Operating temperature range 5℃ to 50℃ (without freezing)
Storage temperature −25℃ to 65℃
Measured liquid pressure 0 MPa to 0.2 MPa
Material of wetted part PPO SUS316 PFA FKM EPDM PVC
Cable length 10 m (standard), maximum extension: 50 m (overall length: 60 m)
Power source 12 V DC supplied from the HU-200SS converter
External dimensions 48 mm in diameter x 250 mm in length (excluding the cable)
Mass Approx. 0.8 Kg (excluding the cable)

Informationsanfrage

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