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UVAS sc
User Manual
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Hach-Lange UVAS sc User Manual

DOC023.52.03230

UVAS sc

USER MANUAL
08/2012, Edition 3A
© HACH LANGE, 2004, 2005, 2012. All rights reserved. Printed in Germany

Table of Contents

Section 1 Specifications ............................................................................................................................................... 5
2.1 Safety information...................................................................................................................................................... 7
2.1.1 Hazard information in this manual ................................................................................................................... 7
2.1.2 Warning labels ................................................................................................................................................. 7
2.2 Applications ............................................................................................................................................................... 8
2.3 Measuring principle ................................................................................................................................................... 8
Section 3 Installation....................................................................................................................................................11
3.1 Installation overview ................................................................................................................................................ 11
3.2 Sensor ..................................................................................................................................................................... 12
3.3 Attaching the Sensorcable....................................................................................................................................... 15
3.4 Wiring safety information......................................................................................................................................... 15
3.4.1 Sensor connection and wiring........................................................................................................................ 16
Section 4 Operation..................................................................................................................................................... 17
4.1 sc controller operation ............................................................................................................................................. 17
4.2 Sensor setup ........................................................................................................................................................... 17
4.3 Sensor data logger .................................................................................................................................................. 17
4.4 Menu structure......................................................................................................................................................... 18
4.4.1 SENSOR STATUS......................................................................................................................................... 18
4.4.2 SENSOR setup .............................................................................................................................................. 18
4.5 Calibration ............................................................................................................................................................... 22
4.5.1 Verifying ......................................................................................................................................................... 22
4.5.2 Zero point calibration ..................................................................................................................................... 23
4.5.3 1 point calibration........................................................................................................................................... 23
4.6 Adjusting measured values ..................................................................................................................................... 24
4.6.1 Zero point adjustment .................................................................................................................................... 24
4.6.2 Setting factor.................................................................................................................................................. 24
4.7 Conversion into other total parameters ................................................................................................................... 25
Section 5 Maintenance ................................................................................................................................................ 27
5.1 Maintenance schedule............................................................................................................................................. 27
5.2 Cleaning measuring path......................................................................................................................................... 28
5.3 Changing wiper profile............................................................................................................................................. 29
5.4 Seal change (bypass version) ................................................................................................................................. 30
5.4.1 UVAS plus sc ................................................................................................................................................ 30
Section 6 Troubleshooting ......................................................................................................................................... 31
6.1 Error messages ....................................................................................................................................................... 31
6.2 Warnings ................................................................................................................................................................. 31
Section 7 Replacement Parts ..................................................................................................................................... 33
Section 8 Warranty and liability ................................................................................................................................. 35
Section 9 Contact ....................................................................................................................................................... 37
Appendix A ModBUS Register Information
.............................................................................................................. 39
3
Table of Contents
4

Section 1 Specifications

Specifications are subject to change without notice.
Table 1 UVAS plus sc tank sensors
UVAS plus sc
Measuring technique UV absorption measurement (2-beam technique), reagent-free
Measuring method SAC 254 in accordance with DIN 38404 C3
Measuring path 1, 2, 5 and 50 mm
0.01-60 m
0.1-600 m–1 (5 mm)
Measuring range
Can be calibrated to the total parameter COD depending on the application
Compensation 550 nm
Measuring interval (> min) >1 min
Cable length
Optional extension cables available in 5, 10, 15, 20, 30, 50 m
Total maximum length: 60 m (196 ft)
0-1500 m 2-3000 m–1 (1 mm)
10 m (33 ft) standard
–1
(50 mm)
–1
(2 mm)
Control function PID, time control, 2-point controller (with sc 100)
Probe pressure limit max. 0.5 bar
Ambient temperature +2 °C to +40 °C
Dimensions D × L Approx. 70 mm x 333 mm
Mass approx. 3.6 kg
Inspection interval 6 months
User maintenance 1 h / month, typical
Table 2 UVAS plus sc bypass sensors
UVAS plus sc (in the bypass)
Measuring path 2, 5 and 50 mm
0.01–60 m
Measuring range With NO
Cable length
Sample flow rate At least 0.5 L/h sample
-N standard solutions
3
Can be calibrated to the total parameter COD depending on the application
Optional extension cables available in 5, 10, 15, 20, 30, 50 m
Total maximum length: 60 m (196 ft)
0.1–600 m 0–1500 m-1 (2 mm)
10 m (33 ft) standard
-1
(50 mm)
-1
(5 mm)
Pressure limit max. 0.5 bar
Sample connection Hose ID 4 mm / OD 6 mm
Sample temperature +2 °C to +40 °C
Dimensions see Figure 4, page 14
5
Specifications
Component Material
Probe
probehousing wiper axis fitting profile joist 2 mm wiperarm 5 mm / 50 mm
Wiper Profile
measuring window seal for housing seal for fitting probe cable
Leverage
probe adapter leverage
Bypass
measuring cell seals fittings tube
Table 3 UVAS plus sc sensor-material
stainless steel 1.4571 stainless steel 1.4571 stainless steel 1.4305 stainless steel 1.4310 stainless steel 1.4581
silicone
SUPRASIL (silica glass)
silicone
PVDF
SEMOFLEX (PUR)
stainless steel 1.4308 stainless steel 1.4301
PVC
EPDM
PVDF
PVC
6

Section 2 General information

2.1 Safety information

Please read this entire manual before unpacking, setting up, or operating this equipment. Pay attention to all danger and caution statements. Failure to do so could result in serious injury to the operator or damage to the equipment.
To prevent any impairment of the instrument's safety features, it must not be used or installed in any manner other than that specified in this manual.
DANGER
Do not use the probe in hazardous area.

2.1.1 Hazard information in this manual

DANGER
Indicates a potentially or imminently hazardous situation which, if not avoided, will result in death or serious injury.

2.1.2 Warning labels

This symbol, if noted on the instrument, references the user manual for operation and/or safety information.
WARNING
Indicates a potentially or imminently hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation that may result in minor or moderate injury.
NOTICE
Indicates a situation which, if not avoided, may cause damage to the instrument. Information that requires special emphasis.
Note: Information that supplements points in the main text.
Read all labels and notices attached to the equipment. Personal injury or damage to the equipment could occur if they are not observed. Any symbol on the equipment will appear along with a caution statement in the manual.
This symbol, when noted on a product enclosure or barrier, indicates that a risk of electrical shock and/or electrocution exists.
This symbol may appear on the product and indicates the need for protective eye wear.
7
General information
35 cm für den Ausbau der Sonde freilassen!
1
3
4
2
Substance groups measured
1. COD 3. SAC
2. BOD 4. TOC
This symbol may appear on the product and identifies the connection point for the protective ground.
When this symbol appears on the product, it identifies the location of a fuse or a current limiter. Electrical equipment marked with this symbol may not be disposed of in European domestic or public disposal
systems after 12 August 2005. In conformity with European local and national regulations (EU Directive 2002/96/EC), European electrical equipment users must now return old or end-of life equipment to the manufacturer for disposal at no charge to the user.
Note: For return for recycling, please contact the equipment manufacturer or supplier for instructions on how to return end-of-life equipment, manufacturer-supplied electrical accessories, and all auxiliary items for proper disposal.

2.2 Applications

UVAS plus sc:
immersed directly in the medium, without pumping or preparation of a sample, the sensor measures the content of dissolved organic compounds in activated sludge tanks in municipal sewage treatment plants, surface water, untreated water and treated drinking water. The system can also be used for checking the outlet of waste water treatment plants.

2.3 Measuring principle

Bypass accessories for UVAS plus sc:
the through-flow variant of the high-precision UVAS plus sc sensor is used wherever direct measurement in the medium is not possible for construction­related reasons or the medium load makes it necessary to measure a filtered sample (very high TS contents, sewage treatment plant inlet, waste dump seepage,...).
NOTICE
Any use other than use in accordance with requirements defined in the user manual leads to the loss of the warranty claims and can lead to personal injury and property damage, for which the manufacturer assumes no liability.
Organic compounds dissolved in water in general absorb UV light, for this reason the measurement of UV absorption represents an independent total parameter for dissolved organic substance water load. In drinking water treatment this method of determination of the quality of water without chemicals using laboratory photometers and filtered samples has a long tradition.
DIN 38402 C2 stipulates for the measurement of the UV absorption, the measuring wavelength of 254 nm and characterises the measured value for a filtered sample as a spectral absorption coefficient at 254 nm (SAC254 for short), which is to be converted to extinctions per metre. In this way straightforward comparability of the measured results from photometers with different cuvette intensities is achieved and the units 1/m or m
–1
are obtained.
8
The UVAS immersed probe comprises a multiple beam absorption photometer with effective turbidity compensation. The related controller controls the process of the measurement using a flash lamp photometer, the mechanical cleaning of the measuring window by a wiper, and also displays the measured values as SAC254 in 1/m.
For other total parameters such as COD or TOC etc. there is a correlation for the SAC254 of the same quality as, e.g., between COD and TOC. Very high
General information
availability of measured values, minimum investment, minimum effort for installation and maintenance or upkeep are therefore often key reasons for the decision in favour of the UVAS sensor if an online measurement is to be used for a total parameter.
For media containing solids, the SAC measurement with UVAS should always be supplemented with a solids or turbidity measurement (SOLITAX sc, ULTRATURB sc).
The maintenance effort for the user is minimal and is limited to a straightforward inspection that, depending on the medium, is due at the most weekly.
9
General information
10

Section 3 Installation

3.1 Installation overview

Installation of this system may only be carried out by qualified experts in accordance with all local safety regulations. See the mounting instruction sheet for more information.
Figure 1 Installation example with optional accessories
CAUTION
11
Installation

3.2 Sensor

Figure 2 Sensor accessory components
1. UVAS sc sensor 3. Wiper profile (5 mm)
2. Wiper profile (1 and 2 mm) 4. Wiper profile (50 mm)
12
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