TETHYS

UV500 Online Water Analyser

OVERVIEW
Parameter Specification
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The UV500 is a on-line water analyser based on a high resolution UV-visible spectrograph.

It allows to monitor simultaneously many different parameters for waste water treatment plants or river monitoring stations with an excellent stability and low operating cost. The same spectrograph can measure organic matter, nitrate, colour, turbidity, phosphate, ammonia and hydrogen sulphide. A complementary UV-visible fluorescence module allows the measurement of aromatics hydrocarbons (PAH). Nephelometric turbidity by visible or infra-red laser diode is also available. The full UV-visible spectrum can also be used to monitor specific chemical process making the UV500 a ideal instrument for chemical plants. External probes can be added for physicochemical parameters like pH, ORP, dissolved oxygen, conductivity and turbidity. Thanks to its automatic cleaning system and its extremely long life time lamp, the maintenance is roughly limited to the periodic refill of the inexpensive cleaning solution and eventually reagents depending on the parameters.

UV-visible Spectroscopy on liquid and gas phase : a unique method

2048 pixels high resolution spectrograph scanning wavelengths from 180 nm to 750 nm is the master part of the UV500. Direct absorbance measurement for UV254, COD, BOD, TOC, NO3, Colour PO4 and Cr VI brings fast and stable measurements with a simple hydraulic circuit. Factory predefined or local multi-point calibration allows to get readings of COD, BOD and TOC under the UV alternative method for compatible applications. UV spectroscopy brings faster results than conventional methods like COD, BOD, TOC with much less maintenance once the correlation is dertermined.
An additional circuit allows the measurement of ammonia and hydrogen sulphide on the gas phase after a stripping step. This unique method allows measurements on extremely turbid or coloured samples like activated sludge as the gas phase is not affected. A fast Fourier transform (FFT) brings an exceptional selectivity and no interference has never been reported after years of operation on many different applications.
The patented flow cell allows very high level of suspended solid without clogging. The turbidity is automatically compensated by a dual-wavelength method.
The UV source is a xenon flash lamp specified for 10^9 flashes that corresponds to more than 10 years of life time with one measurement every minute.
Physico-chemical measurements like pH, ORP, dissolved oxygen, conductivity can be added to the internal measurements by using external probes. The dissolved oxygen probe is based on fluorescence method for a lower maintenance and higher stability.

Measuring principle by absorbance (liquid and gas phase)

1 : spectrograph,
2 : beam splitter,
3 : patented water flow cell,
4&5 : xenon lamps,
6 : gas flow cell ,
7 : gas pump,
8 : stripping pot,
9 : temperature probe

UV fluorescence principle

1 : Xenon lamp,
2 : excitation filter,
3 : flow cell,
4 : emission filter,
5 : photomultiplier,
6 : reference photo detector

Laser Diode Turbidity Principal (Nephelometric)

1 : Laser diode (650 nm or 850 nm),
2 : flow cell,
3 : Photo detector

Patented Flow cell

1 : Allows very high level of suspendedsolid without clogging for all the optical measurements making it suitable for industrial & municipal waste water application. More...

Robust Industrial Probes

All the probes are specially designed for harsh environments with high level of suspended solid.

ORP/pH Probe

Dissolved Oxygen Probe

pH Differential Probe

Total Suspended Solid Probe

Turbidity Probe

Conductivity Probe

User-Friendly Interface

Note: Click on image to view it large.

The colour touch screen (10.4") and intuitive interface available in 9 different languages (Chinese, English, French, German, Hungarian, Italian, Portuguese, Spanish, Turkish) makes very easy to test or configure the analyser. Many test functions allows to test and troubleshoot each element of the analysers (light signal, pumps, solenoid valves, etc...) to setup quickly a maintenance diagnostic. An acid resistant protection film on the screen assumes an efficient long term protection.

Communication

The RS232 port supports the MODBUS protocol to transmit each Standard channel value to a SCADA system. Additional parameters are available like status code, error code, calibration values and pumps run time. Basic 4-20 mA output modules can be plugged on the main board for each Standard channel, in the limit of 12 modules. A USB port enables to download on any USB key the last 5000 recorded measurements as well as a diagnostic file containing the configuration and useful information for remote troubleshooting.The recorded measurements file can be imported to Excel for graphs or other treatments. The software of the analyser can be upgraded by connecting a USB key. A USB port enables to download on any USB key the last 5000 recorded measurements as well as a diagnostic file containing the configuration and useful information for remote troubleshooting.The recorded measurements file can be imported to Excel for graphs or other treatments. The software of the analyser can be upgraded by connecting a USB key.

Multiplexing system

When different streams need to be analysed, for example inlet and outlet of a plant, an optional multiplexing system delivers relay contacts to control external electric-valves or external pumps.

Up to 6 different streams can be selected

The Standard channels can be either duplicated (each one having its own 4-20mA output or MODBUS register), or measured sequentially to fit with the maximum of 16 Standard channels (a MODBUS register tells which stream is currently being measured).

Sampling System

The UV500 can adapt to many different kind of sampling depending of the application : surface water, drinking water, process water or wastewater.

If the water is already pressurized, the sample can be admitted directly inside the analyser with a maximal pressure of 4 bars. Otherwise an optional built-in peristaltic pump, synchronised with the measurement to extend the tubing life time, allows to take the sample directly from a tank located up to 6 meters below the analyser. For demanding applications with long distances, another peristaltic pump in a separate enclosure is proposed as an option. For some applications on river water or wastewater where two sampling pumps are necessary, the UV500 delivers a relay contact to synchronise the primary pump. The delay and running time of each pump can be adjusted easily in the parameters menu of the analyser.

Autocleaning

The analyser is designed to automatically clean itself with an adjustable time range, typically 24 hours, using sulfuric acid 5%. This autocleaning with sulfuric acid 5% proves to be more efficient than water or air autocleaning for dirty and oily samples. It prevents any clogging in the hydraulic circuit from heavily charged water samples. This autocleaning design enables uninterrupted measurements and low maintenance.

Autozeroing

Sulfuric acid has no absorbance in the UV-visible, making it an ideal component to measure the zero. At the end of each autocleaning cycle, the zero is performed on the sulfuric acid 5%. This frequency of zeroing is the key for successful measurements as it prevents any drift in the zero to occur.

UV500 Dimensional Drawing

The UV500 is a on-line water analyser based on a high resolution UV-visible spectrograph.
It allows to monitor simultaneously many different parameters for waste water treatment plants or river monitoring stations with an excellent stability and low operating cost. The same spectrograph can measure organic matter, nitrate, colour, turbidity, phosphate, ammonia and hydrogen sulphide. A complementary UV-visible fluorescence module allows the measurement of aromatics hydrocarbons (PAH). Nephelometric turbidity by visible or infra-red laser diode is also available. The full UV-visible spectrum can also be used to monitor specific chemical process making the UV500 a ideal instrument for chemical plants. External probes can be added for physicochemical parameters like pH, ORP, dissolved oxygen, conductivity and turbidity. Thanks to its automatic cleaning system and its extremely long life time lamp, the maintenance is roughly limited to the periodic refill of the inexpensive cleaning solution and eventually reagents depending on the parameters.

Online water analyzer, UV500 - Parameter Specification

Parameter	Standard range Other ranges on request	Typical Repeatability For low values (<10% FS)	Accuracy On standard solution
UV254	0-200 Abs/m 0-600 Abs/m 0-2000 Abs/m	+/- 0.05 Abs/m +/- 0.15 Abs/m +/- 0.5 Abs/m	+/- 2%
COD by UV correlation	0-100 mg/l COD 0-2000 mg/l COD 0-20,000 mg/l COD	+/-0.05 mg/l COD +/- 1 mg/l COD +/- 10 mg/l COD	+/- 2%
BOD by UV correlation	0-100 mg/l BOD 0-1000 mg/l BOD 0-10,000 mg/l BOD	+/-0.05 mg/l BOD +/- 0.5 mg/l BOD +/- 5 mg/l BOD	+/- 2%
TOC by UV correlation	0-100 mg/l TOC 0-1000 mg/l TOC 0-10,000 mg/l TOC	+/-0.05 mg/l TOC +/- 0.5 mg/l TOC +/- 5 mg/l TOC	+/- 2%
Ammonia	0-100 mg/l NH4	+/- 0.2 mg/l NH4	+/- 5%
Nitrate (NO3)	0-100 mg/l NO3	+/- 0.1 mg/l NO3	+/- 2%
Colour	0-100 Pt/Co 0-1000 Pt/Co	+/- 0.2 Pt/Co +/- 2 Pt/Co	+/- 2%
PAH (aromatics)	0-10 mg/l C6H6	+/- 0.01 mg/l C6H6	+/- 2%
Oil in Water	0-100 ppm OIW 0-1000 ppm OIW	+/- 0.1 ppm OIW +/- 1 ppm OIW	+/- 2%
Phosphate	0-2 mg/l P-PO4 0-20 mg/l P-PO4	+/- 0.01 mg/l P-PO4 +/- 0.1 mg/l P-PO4	+/- 2%
Hydrogen Sulphide	0-20 mg/l H2S	+/-1 mg/l H2S	+/- 2%
Chromium IV	0-2 mg/l Cr VI	+/-0.04 mg/l Cr VI	+/- 2%
Turbidity (TSS by correlation)	0-10 NTU 0-100 NTU 0-1000 NTU	+/- 0.01 NTU +/- 0.1 NTU +/- 1 NTU	+/- 2%
pH	0-14 pH	+/- 0.01 pH	+/- 2%
ORP	+/- 2000 mV	+/- 1 mV	+/- 2%
Dissolved Oxygen(DO)	0-25 mg/l O2	+/- 0.1 mg/l O2	+/- 2%
Conductivity	0-2000 μS	+/- 1 μS	+/- 2%
External turbidity (TSS by correlation)	0-4 NTU 0-40 NTU 0-400 NTU		+/- 2% +/- 2% +/- 2%
External TSS	0-1500 mg/l TSS 0-30000 mg/l TSS	+/- 1% of reading or +/- 2 mg/l TSS +/- 1% of reading or +/- 2 mg/l TSS
Temperature	0-80°C	+/- 0.1 °C	+/- 2%

Online water analyzer, UV500 - General Specification

Sample flow	Recommended : 0 - 5 L/MIN 0 – 0.5 l/min for NH4 or H2S
Sample pressure	0 – 4 Bar (0 - 1 Bar with sampling peristaltic pump) 0 – 0.5 Bar for NH4 or H2S
Sample temperature	0 °C to 80 °C 0°C to 30°C for NH4 or H2S
Wet parts material	Quartz, Polypropylene, Polyethylene, FPM (Viton), PMMA (+ Pharmed and glass for NH4 or H2S)
Measurement interval	1 min to 720 min Physicochemical parameters may be continuous
Memory	5000 lines of measurements (up to 16 channels) with date and time
Consumption	Cleaning solution (5% sulfuric acid): 220 ml/day Reagent for PO4: 2 ml per measurement NaOH 10% for NH4: 2 ml per measurement HCl 10% for H2S: 2 ml per measurement
Maintenance interval	Recommended: 6 months to 1 year (except for refilling)
Power supply	90 - 264 VAC 50/60 Hz 80 VA
Screen	Colour TFT LCD 640x480 pixels with LED backlight
Communication	RS232 with MODBUS protocol RS485 for external probes (DO, TSS) USB WI-FI (IEEE802.11B) optional Ethernet (IEEE802.3) optional
Certifications	CE, EN 61010-1, EN 61326e
Enclosure	Stainless steel with epoxy coating, IP65, wall mounting brackets
Dimensions	525x345x260 mm
Weight	20 to 30 kg depending on the configuration

UV500 Parts References

Basic Unit
UV500	Basic unit (no measurement included Color graphic display 640x320 pixels with touch screen Built-in data logger, memory 5000 measurements for each parameter 12 sockets for input and output modules (not included, refer to options) 7 available glands for inputs / outputs RS232 included (Sub-D 9 ways female connector) with 2 meters cable for PC RS485 included for communication with MODBUS protocol USB port included for USB key connection Automatic cleaning system with 2 liters tank Power supply 90 - 264 VAC / maxi 100 VA : 50 - 60 Hz with power cord 2 meters Enclosure IP65/Nema4x stainless steel 316 521x473x250 mm (HxWxD) / 20 to 30 kg Mounting lugs for wall
UV500-P (Premium)	Basic unit (no measurement included Same specifications as UV500 except dimensions : 525x473x260 mm
Sampling pump
P	Sampling peristaltic pump for unpressurized water Flow of about 940 mL/min Heavy duty brushless motor Discontinuous operating to increase tube lifetime
P-EXT	External Peristaltic sampling pump for unpressurized water Built-in on the left side of the enclosure Flow of about 600 mL/min Discontinuous operating to increase tube lifetime
pectrograph (required for UV254, COD, BOD, TOC, NO₃, Colour, PO₄, Cr VI, NH₄ and H₂S measurements)
SPECTRO500	UV-Visible spectrograph Range: 180 – 750 nm Resolution 0.29 nm 2048 pixels
Absorbance flow cell and xenon lamp (required for UV254, COD, BOD, TOC, NO₃, Colour, PO₄, Cr VI measurements)
ABS500	Flow cell and xenon lamp for absorbance measurements Optical path: 1, 3 or 10 mm Lamp life time: 109 flashes Wet materials: PMMA, Viton, Quartz
Configuration and calibration for measurements by absorbance (require SPECTRO500 and ABS500 modules)
COD-H-500	high range: 0 – 2000 Abs/m (equivalent to approx. 20000 mg/L COD on municipal waste water)
COD-M-500	Organic matter Medium range medium range: 0 – 600 Abs/m (equivalent to 2000 mg/L COD)
COD-L-500	Organic matter low range low range: 0 – 200 Abs/m (equivalent to 100 mg/L COD on river water)
NO3-500	Nitrate Range: 0 – 100 mg/L NO₃ (0 – 25 mg/L N of NO₃) Measurement possible until 250 mg/L NO₃ (60 mg/L N-NO₃)
CO-H-500	Colour high range Range: 0 – 1000 Pt-Co unit
CO-L-500	Colour low range Range: 0 – 100 Pt-Co unit
Measurement by UV fluorescence (required for PAH and OIW measurements)
PAH-500	Poly-aromatic hydrocarbons Range: 0 – 10 ppm phenol Range: 0 – 100 ppm OIW (equivalent to approx. 0 – 100 ppm oil with 10% aromatic ratio)
Measurement module by colorimetric method (require SPECTRO500 and ABS500 module)
PO4-H-500	Phosphate high range High range: 0 – 20 mg/L P (60 mg/L PO₄) Sampling peristaltic pump included
CR6-500	Hexavalent chromium (VI) Range: 0 – 2 mg/L Cr VI Measurement possible up to 5 mg/L Cr VI
PO4-L-500	Phosphate low range Low range: 0 – 2 mg/L P (6 mg/L PO₄) Sampling peristaltic pump included
Measurement by nephelometry
IRTURB-H-500	Internal turbidity sensor high range High range: 0 – 1000 NTU Nephelometric method by laser diode at 650 nm (850 nm on request)
IRTURB-M-500	Internal turbidity sensor medium range Low range: 0 – 100 NTU Nephelometric method by laser diode at 650 nm (850 nm on request)
IRTURB-L-500	Internal turbidity sensor low range Low range: 0 – 10 NTU Nephelometric method by laser diode at 650 nm (850 nm on request)
Measurements by optical method
DO-F	Dissolved oxygen probe by fluorescence Range: 0 - 25 mg/L O₂ 7 meters of cable
EXT-TURB-H	Turbidity probes high range High range: 0 – 30000 mg/L TSS 7 meters cable
EXT-TURB-L	Turbidity probes low range Low range: 0 – 1500 mg/L TSS 7 meters cable
EXT-TURBNEPH-H	Nephelometric turbidity probes high range Range: 0 – 400 NTU 10 meters cable
EXT-TURBNEPH-M	Nephelometric turbidity probes medium range Range: 0 – 40 NTU 10 meters cable
EXT-TURBNEPH-L	Nephelometric turbidity probes low range Range: 0 – 4 NTU 10 meters cable
Measurement by UV absorption in gas phase
STRIP500	Stripping system Include xenon lamp, flow cell, glassware, air pump, air filter and solenoid valve
NH4-500	Ammonia Range: 0 – 100 ppm NH₄+
H2S-500	Hydrogen sulfide Range: 0 – 20 ppm H₂S
Input modules
IN4-20-500	4-20 mA input module Isolated 4-20 mA input Impedance: 100 Ohm
LOGIC500	Double logical inputs module Input no 1 : external pulse command for measurement Input no 2 : measurements inhibition Isolated 0 – 48 V DC inputs Impedance: >10 Kohm
PH500	pH/ORP module pH Range: 0 – 14 ATC input for platinum RTD 100 Ohm or 1000 Ohm ORP Range: -2000 mV to +2000 Mv
COND500	Conductivity module Range: 0 – 100 µS/cm to 0 – 100 mS/cm ATC input for platinum RTD 100 Ohm
Measurements by electrode (external)
ELPH	pH on-line electrode Range: 0 – 14 5 meters of cable (10 meters in option) Built-in ATC RTD 100 Ohm
ELORP	ORP on-line electrode Range: -2000 mV to +2000 Mv 5 meters of cable (10 meters in option) Built-in ATC RTD 100 Ohm
ELCOND	Conductivity on-line electrode Range: 0 – 10 mS/cm Cell constant k=1.0 cm-1 (medium range) 5 meters of cable (10 meters in option) Built-in ATC RTD 100 Ohm
ICOND	Inductive conductivity online probe Range: 0 – 100 mS/cm 3 meters of cable Built-in temperature compensation at 2.2%/°C Requires a IN4-20-500 module instead of COND500 module
Output modules
OUT4-20-500	OUT4-20-500 Isolated 4-20 mA output Active output, Max load 500 Ohm
RELAY500	RELAY500 RELAY500
Recommanded consumables for 2 years :
P-ACI-HD1 :	Head of cleaning pump (x1)
P-RGT-HD1 :	Head of reagent pump (x1) (only for NH₄ or H₂S)
T-PHAR-1 :	Tubing 6.4x9.6 mm (if optional sampling pump) (x2 to x8 depending on sampling pump use)
Cleaning solution and reagents (if any) are not provided