UV-VIS Absorption Method

Scientific Product
Assistant Buniness Unit Manager : Miss. Rotsukon Chanseeharat
Tel : 081-988-2819
E-mail : rotsukon@pico.co.th
Admin
Tel : 02-939-5711 ext. 611
E-mail : scientific@pico.co.th

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Overview

The OPSA-150 is a new organic pollutant monitor that uses HORIBA’s proprietary Rotary Cell Length Modulation, a measuring technique incorporating 25 years of expertise.
The unit can be used as an organic pollutant monitor at drainage systems for determining compliance with COD monitoring regulations, for monitoring quality of water measuring levels of organic matter at water supply intakes, and as an organic monitor on process lines (phenol meter).

*Pole mount, outdoor cover, and analysis panel are available as options.

Features

Sensor that makes full use of Rotary Cell Length Modulation (Patent pending)

·         Zero drift correction is perfomed in every cycle of measurement. This correction can eliminate the effect of any interference on cells.

·         Cell length modulation provides readings from multiple measurements, making available results from various cell lengths. This allows the single device to make measurements on a large range of concentrations from as low as 0 to 0.1 Abs, up to 0 to 5.0 Abs.

Specifications

NameOrganic Pollutant Monitor
Model nameOPSA-150
Measurement itemsUV absorbance, VIS absorbance, Converted COD level, Converted TURB level
Principle2 light path 2 wavelength cell length modulation
Measurement wavelengthUV: 253.7 nm, VIS: 546.1 nm
Construction of analysis sectionRotary type
Range (Equivalent to a cell length of 10 mm)UV absorbance / VIS absorbance
0 to 0.1 Abs – 0 to 5.0 Abs (Can be set 0.1 Abs increments)
Resolution0.0001 Abs (Can be set to 0.001 Abs)
RepeatabilityWithin ±2% of full scale (within ±5% if full scale is 2.6 to 5.0 Abs)
LinearityWithin ±2% of full scale (within ±5% if full scale is 2.6 to 5.0 Abs)
StabilityWithin ±2% of full scale in 24 hours (within ±4% in 24 hours if full scale is 2.6 to 5.0 Abs)
Response timeT 90 within 1 minute (flow rate of 5 L/min)
Cleaning method (cleaning cycle)Automatic cleaning via wipers (continuous cleaning)
Display methodsLCD display: 320 x 240 monochrome crystal display with backlight (touch panel type)
Display details: UV absorbance, VIS absorbance, UV-VIS absorbance (Absorbance can be changed to absorption constant (SAC: m-1), Converted COD level, Converted turbidity level
Calibration methodSolution calibration (calibration solution inserted in ampule) via zero solution, span solution (single touch calibration)
Sample conditionsTemperature2 to 40°C*
Sample flow rateMinimum 2 L/min, Maximum 20 L/min
*Use a heating device to prevent sample freezing.
Ambient conditionsAmbient temperature: 0 to 40°C, Ambient humidity: 85% or less
Analog outputNo. of outputs3 outputs (standard)
TypeUp to 3 can be chosen from UV absorbance, VIS absorbance, UV-VIS absorbance, Converted COD level, and Converted TURB level outputs
SpecificationDC 4 – 20 mA, or DC 0 – 16 mA, isolated output (no isolation between each channel), maximum resistance load: 600Ω
Alarm and status outputsNo. of outputs6 outputs (standard)
TypeUp to 4 can be chosen from power failure, maintenance (standard and fixed), batch alarm, COD maximum limit alarm, TURB limit alarm (standard), light source error, sample failure, cleaning motor error, and analyzer error outputs
DetailsPower failure…occurs when power fails Total alarm…cleaning motor error, light source error, analyzer error Maintenance…occurs when entering maintenance or correction mode, or when the maintenance switch has been turned on
SpecificationDry contact output, NO contact
Contact rating: AC 125 V 0.3 A, DC 30V 1 A (with resistance load) Each output has an independent COM interface
Contact inputNo. of inputs2 inputs (standard)
TypeSample failure float switch input, time correction input
SpecificationsNo-voltage contact input (can connect to open collector), isolated input
On resistance: Maximum 100Ω, Open voltage: DC 26 V, Short circuit current: 13 mA
CommunicationInterface: RS-232C Compatible Communication speed: 19200 bps
Data memoryValues of measurement items are stored in the main unit”s data memory. Data can also be transferred to a Compact Flash card.
Memory interval1 minute or 1 hour
Memory save timeEvery hour*
Data memory capacity1 minute intervals0 for 10 day”s data, 1 hour intervals0 for 1 year” s data
*The most recent data is saved to memory.
Light source / DetectorLight source: Low pressure mercury lamp / Detector: Silicon photo cell
Tubing connectionsSample entryRp-1/2 socket
Overflow outlet (1)13 A nominal diameter socket
Bypass outletRc-1/2 socket
Drain outlet50 A nominal diameter socket
Overflow outlet (2)20 A nominal diameter socket
Drain outletRc-1/2 socket
ConstructionFor outdoor installation
Material of parts in contact with sampleSUS, PVC, PP, CR, SiO2
Power sourceAC 100 V to AC 230 V ±10%, 50/60 Hz
Power consumptionAC 100 V to AC 120 V: 45 VA maximum AC 200 V to AC 230 V: 60 VA maximum
WeightOperating section: Approx. 5.0 kg Analyzer section: Approx. 5.6 kg
External dimensionsOperating section240 (W) x 105 (D) x 320 (H)
Analyzer section200 (W) x 180 (D) x 404 (H) (units: mm) (excludes protruding sections)
Color/FinishMunsell 5PB8/1
Installation conditions• Install on a flat stable surface away from sources of vibration and shocks.
• Ambient air must not contain dust, mist or corrosive gases.
• Use at atmospheric pressure.
• Out of direct sunlight.
• An area with good air circulation.
• An altitude of less than 2000 m.

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