Product name
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Water Distribution Monitor
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Model name
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TW-100
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Parameters
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Turbidity, color, free chlorine, water pressure (standard); pH, conductivity, water temperature (option)
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Methods
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See chart 1.
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Range
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See chart 1.
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Repeatability
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See chart 1.
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Display
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LCD display: 320 x 240 dot B&W graphic LCD with backlight (touch panel type)
Standard version simultaneously displays four measurement categories (turbidity, color, free chlorine, and water pressure); Optional version simultaneously displays up to seven parameters (the four parameters plus pH, conductivity, and water temperature)
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Calibration method
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See chart 1.
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Automatic zero calibration
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(Turbidity, color, free chlorine)
Calibration method: Measurement of filtered sample water
Trigger: Internal control (timer) or external control.
Interval: 5 to 9999 hours (can be set as desired within that range)
Time: About 15 minutes
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Automatic cleaning
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(Turbidity, color)
Cleaning method: Wiper cleaning
Trigger: Internal control (timer) or external control.
Interval: 5 to 9999 hours (can be set as desired within that range)
(Free chlorine)
Continuous cleaning with beads grinder
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Sample water conditions
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Temperature: 0 to 40°C (must not freeze)
Pressure: 0.1 to 0.75 Mpa
Flow rate: over 100 mL/min
Flow rate for measurement: 50 to 100 mL/min
* Be sure to flush the sample water before starting the system.
* Be sure to install a bypass for the pipe to which the system is attached.
* If there is any possibility that the sample water could freeze, please protect the system from cold temperature.
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Ambient temperature/humidity
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Temperature; 0 to 40°C; Humidity: 85% or less
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Analog output
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Type: Measurement value: Same number as parameters (4 standard, 7 as maximum)
Specifications: DC 4 to 20 mA, insulated output (no insulation between parameters), maximum load resistance 600 Ω
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Output signal
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Type: Power off, batch alerts, maintenance
Details: Power off: Output when power is off.
Batch alerts: Cell temperature error, compensation temperature error, cell wiper error, internal communication error,water leak, battery error, upper and lower limit of measurement, light source error, zero calibration, span calibration,analyzer error
Maintenance: Output when the system is in maintenance or calibration mode.
Specifications: Non-voltage contact output, a contacts
Contact ratings: AC 125 V, 0.3 A, DC 30 V, 1 A (depends on resistance load), each output COM is independent.
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Input signal
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Type: Cleaning start, zero calibration start, error check sequence start, error water sampling start
Details: Cleaning start: Cleaning procedure initiated with closed contact input
Zero calibration start: Zero calibration initiated with closed contact input
Error discrimination start: Error discrimination initiated with closed contact input
Error water sample sampling start: Error water sample sampling initiated with closed contact input
Specifications: Non-voltage contact input (open collector contact can be used), insulated input
Resistance when ON: Maximum 100 W; Open voltage: DC 26 V; Short-circuit current: Max. 13 mA
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Communications
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Interface: RS-232C compliant (*Remote monitoring system is option)
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Functions
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Estimation of sample water volume (counting type), internal water leak detection, error water sampling
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Data memory
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Measurement values for each parameters are stored in the unit’s data memory. Data can be transferred to a CF card.
Memory interval: 1 minute or 1 hour
Memory schedule: At the top of the hour
Data memory longevity: 1 minute intervals: About 10 days; 1 hour intervals: About 1 year.
* The latest data is written to up date a series of data.
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Wiring contact
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Wiring ground: For power source: φ4.5 to φ6; For input/output: φ12.5 to φ14
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Piping contact
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Sample water input: Rc 1/4; Drainage: Rc 1/4; Calibration solution input: Rc 1/8; Error sample sampling aperture: Rc 1/8
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Construction
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Designed for indoor installation. * Housed in a special case (frame) for exterior installation (option).
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Power
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AC 100 V to AC 230 V, ±10%, 50/60 Hz
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Power consumption
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AC 100 V to AC 120 V: 120 VA; AC 100 V to AC 230 V: 150 VA
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Mass
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Approx. 15 kg (Measurement unit only)
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External dimensions
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350 mm (W) x 160 mm (D) x 420 mm (H) (not including installation fixtures and projecting portions)
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Paint color/Material
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Munsell 5PB8/1; Unit case is made of SUS.
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Installation environment
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Install on a flat surface without vibration shocks. No dust, mist, or corrosive gases in the atmosphere. Lower air pressure. No direct sunlight. Ventilated air. 2,000 m or less above sea level.
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