wtw Turb 555 User manual

ba41113e07 04/2009
Turb 555 /
Turb 555 IR
Operating Manual
Turbidity measuring instrument

Turb 555 /Turb 555IR
2ba41113e07 04/2009
Accuracy when
going to press
The use of advanced technology and the high quality stan-
dard of our instruments are the result of a continuous devel-
opment. This may result in differences between this
operating manual and your instrument. Also, we cannot
guarantee that there are absolutely no errors in this manual.
Therefore, we are sure you will understand that we cannot
accept any legal claims resulting from the data, figures or
descriptions.
Copyright ©Weilheim 2009, WTW GmbH
Reprinting - even as excerpts - is only allowed with the ex-
plicit written authorization of WTW GmbH, Weilheim.
Printed in Germany.

Turb 555 / Turb 555 IR Contents
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Turb 555 / Turb 555 IR - Contents
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Operation pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.3 Sockets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2 General safety instructions . . . . . . . . . . . . . . . . . . . 10
3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . 13
3.1 Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . 13
3.2 Connecting the plug-in power supply unit . . . . . . . . 14
3.3 Switching on the measuring instrument . . . . . . . . . 15
4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1 Instructions for operating . . . . . . . . . . . . . . . . . . . . . 17
4.1.1 Marking and aligning cuvettes . . . . . . . . . . . 17
4.1.2 Venting the sample . . . . . . . . . . . . . . . . . . . 19
4.2 Measuring turbidity . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.2.1 Measuring methods of the Turb 555 and
Turb 555 IR 20
4.2.2 Single measurements . . . . . . . . . . . . . . . . . 23
4.2.3 Measuring turbidity using the pour-through
vessel (accessory) 25
4.2.4 Measuring turbidity using the flow-through
vessel (accessory) 29
4.3 Access codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.3.1 General information . . . . . . . . . . . . . . . . . . . 34
4.3.2 Entering access codes . . . . . . . . . . . . . . . . 34
4.4 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
4.4.1 Basic information on calibration . . . . . . . . . . 36
4.4.2 Calibration procedures . . . . . . . . . . . . . . . . 37
4.4.3 Preparing the calibration . . . . . . . . . . . . . . . 38
4.4.4 Five-point calibration . . . . . . . . . . . . . . . . . . 39
4.4.5 User-defined calibration . . . . . . . . . . . . . . . . 45

Contents Turb 555 /Turb 555IR
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4.5 Setting up the instrument . . . . . . . . . . . . . . . . . . . . . 47
4.5.1 General information . . . . . . . . . . . . . . . . . . . 47
4.5.2 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
4.5.3 Resetting to default settings (Reset) . . . . . . 58
4.6 Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
4.6.1 Connecting the printer or PC . . . . . . . . . . . . 59
4.6.2 Output of measured values . . . . . . . . . . . . .59
4.6.3 Calibration record . . . . . . . . . . . . . . . . . . . . 61
5 Maintenance, cleaning, disposal . . . . . . . . . . 63
5.1 Replacing the lamp module . . . . . . . . . . . . . . . . . . . 63
5.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
5.2.1 Cleaning the measuring instrument . . . . . . .64
5.2.2 Cleaning the cuvettes . . . . . . . . . . . . . . . . .64
5.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
6 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . 67
7 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . 71
8 Accessories, Options . . . . . . . . . . . . . . . . . . . 75
9 Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Turb 555 / Turb 555 IR Overview
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1Overview
The Turb 555 / Turb 555 IR lets you perform turbidity mea-
surements easily and reliably.
The measuring method used in the Turb 555 IR corresponds
to the ISO 7027 / DIN 27027. The measuring method used
in the Turb 555 follows the US EPA construction recommen-
dations.
1
2
3
4
5
Short instructions
Keypad
Display
Cuvette shaft
Marker pin
6
7
8
9
Lamp module
Cuvette
Marker ring
Light protection cap

Overview Turb 555 /Turb 555IR
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1.1 Operation pad
The Turb 555 / Turb 555 IR is operated via a 6 key touch pad
and a display (LCD):
Key Function
Switch the measuring instrument on/off
Confirm input
Save/output measured value
Increase values
Select settings
Reduce values
Select settings
Scroll one menu page backwards
Scroll one menu page forwards

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1.2 Display
The display is integrated in the touch pad. It has the follow-
ing possible indications:
The display has a background illumination which facilitates
reading the displayed information even when the ambient
light is bad.
1Code symbol: Prompt to input the code
2Measured value
3User guidance symbols
4Unit (only active during calibration)
5Unit / User guidance / Error messages
6Status indicators

Overview Turb 555 /Turb 555IR
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1.3 Sockets
1Socket for plug-in power supply unit
2Dry air purge system inlet
3Dry air purge system outlet
4RS232 interface
5Plug-in power supply unit

Turb 555 / Turb 555 IR Safety
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2 Safety
This operating manual contains basic instructions that you
must follow during the commissioning, operation and main-
tenance of the measuring instrument. Consequently, all re-
sponsible personnel must read this operating manual before
working with the measuring instrument.
The operating manual must always be available within the
vicinity of the measuring instrument.
Target group The measuring instrument was developed for use in the lab-
oratory. Thus, we assume that, as a result of their profes-
sional training and experience, the operators will know the
necessary safety precautions to take when handling chemi-
cals.
Symbols
used
CAUTION
indicates instructions that have to be followed to pre-
vent damage to your instrument.
Note
indicates notes that draw your attention to special features.
Note
indicates cross-references to other documents, e. g. appli-
cation reports.

Safety Turb 555 /Turb 555 IR
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2.1 Authorized use
This instrument is authorized exclusively for turbidity mea-
surements in the laboratory.
The technical specifications as given in chapter TECHNICAL
DATA, must be observed. Only the operation and running of
the measuring instrument according to the instructions given
in this operating manual is authorized. Any other use is con-
sidered unauthorized.
2.2 General safety instructions
This instrument left the factory in a safe and secure techni-
cal condition.
Function and oper-
ating safety
The smooth functioning and operational safety of the mea-
suring instrument can only be guaranteed if the generally
applicable safety measures and the specific safety instruc-
tions in this operating manual are followed during operation.
The smooth functioning and operational safety of the mea-
suring instrument can only be guaranteed under the climatic
conditions specified in the chapter TECHNICAL DATA.
If the instrument was transported from a cold environment to
a warm environment, the formation of condensate can lead
to the faulty functioning of the instrument. In this event, wait
until the temperature of the instrument reaches room tem-
perature before putting the instrument back into operation.

Turb 555 / Turb 555 IR Safety
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Safe operation If safe operation is no longer possible, the instrument must
be taken out of service and secured against inadvertent op-
eration!
Safe operation is no longer possible if the measuring instru-
ment
zhas been damaged in transport
zhas been stored under adverse conditions for a lengthy
period of time
zis visibly damaged
zno longer operates as described in this manual.
If you are in any doubt, please contact the supplier of the in-
strument.
Obligations of the
operator
The purchaser of this measuring instrument must ensure
that the following laws and guidelines are observed when
using dangerous substances:
zEEC directives for protective labor legislation
zNational protective labor legislation
zSafety regulations
zSafety datasheets of the chemical manufacturers.

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Turb 555 / Turb 555 IR Commissioning
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3 Commissioning
Scope of delivery zTurb 555 or Turb 555 IR laboratory measuring instrument
with short instructions
zOperating manual
zUniversal plug-in power supply unit with country-specific
adapters
zPlastic box with 4 calibration standards (0.02 / 10 / 100 /
1750 NTU) including marker rings
zThree empty cuvettes with marker rings
3.1 Initial commissioning
Inserting the short
instructions
The first time the instrument is commissioned, you must in-
sert the card that was delivered containing the short instruc-
tions into the underside of the measuring instrument:
1Turn the instrument around and carefully put it down.
2 Insert the card with the short instructions so that the
English side is not visible.
3Turn the instrument around again. The short instruc-
tions card can now be pulled forward from under the
instrument.

Commissioning Turb 555 /Turb 555 IR
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3.2 Connecting the plug-in power supply unit
1Plug the original WTW plug-in power supply unit (3)
into the socket (1) of the measuring instrument.
2 Plug the suitable adapter (2) into the plug-in power
supply unit.
3Connect the plug-in power supply unit to an easily ac-
cessible mains socket.

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3.3 Switching on the measuring instrument
Sample display
Warm-up period For routine measurements without special accuracy require-
ments, a warm-up period of 5 minutes is sufficient. For high
precision measurements, the warm-up period should be 30
minutes minimum. This is also valid when you want to cali-
brate your instrument. Only then we can guarantee that the
instrument measures with the accuracy specified in
chapter 7 TECHNICAL DATA.
Note
Even if the instrument is not measuring, always leave a cu-
vette plugged in the cuvette shaft so that the cuvette shaft is
protected against dust.
1Place the measuring instrument on a flat surface and
protect it from intense light and heat.
2 Press the 0key.
The measuring instrument automatically switches to
the measuring mode: A measured value and the a
display appear.
3Set the date and time, if necessary (see section
4.5 SETTING UP THE INSTRUMENT).
4 Wait until the warm-up period is over.

Commissioning Turb 555 /Turb 555 IR
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Turb 555 / Turb 555 IR Operation
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4Operation
4.1 Instructions for operating
4.1.1 Marking and aligning cuvettes
Even completely clean quality cuvettes exhibit tiny direction-
al differences in their light transmittance. Therefore, each
cuvette should be marked - both the measuring cuvettes as
well as the cuvettes with the calibration standards (refer to
section 2130 of the "Standard Methods for the Examination
of Water and Wastewater", 19th edition). Consequently,
each cuvette can always be inserted in the correct position
and you can achieve precise and reproducible measuring
results.
Cleaning the cuvette The cuvette must be absolutely clean (see section
5.2.2 CLEANING THE CUVETTES).
Marking the cuvette This is how to mark a cuvette (empty or full):
1The cuvette must be closed with the black light pro-
tection cap. Make sure that the outside of the cuvette
is clean, dry, and free of fingerprints.
2 Insert the cuvette in the cuvette shaft of the turbidi-
meter.
3Slowly rotate the cuvette through one complete rota-
tion (by 360°).
4 Watch the display of the turbidimeter while you rotate
the cuvette. Leave the cuvette in the position that
gives the lowest display.
5Attach a marker ring to the black light protection cap
of the cuvette. The arrow on the marker ring must
point to the marker pin on the casing of the cuvette
shaft.
6 Leave the marker ring on the light protection cap of
the cuvette. This cuvette is now permanently marked.

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Note
Always use the cuvette and the light protection cap together;
only in this way is the cuvette marked.
Aligning a marked
cuvette
A marked cuvette is aligned as follows:
Aligning an
unmarked cuvette
An unmarked cuvette is aligned as follows:
Balancing cuvettes Even insignificant variations in the glass affect the mea-
sured value. For this reason, always use the same cuvette
or balance a pair of cuvettes for low turbidity values:
1Insert the cuvette in the cuvette shaft of the turbidi-
meter.
2 Align the marked cuvette so that the arrow on the
marker ring points to the marker pin on the locking
collar of the cuvette shaft.
1Insert the cuvette in the cuvette shaft of the turbidi-
meter.
2 Slowly rotate the cuvette through one complete rota-
tion (by 360°).
3Watch the display of the turbidimeter while you rotate
the cuvette. Leave the cuvette in the position that
gives the lowest display.
1Fill the first cuvette with the sample, align it and mark
it (see section 4.1.1 MARKING AND ALIGNING CUVET-
TES).
2 Fill the second cuvette with the same sample and in-
sert it into the cuvette shaft.
3Rotate the cuvette until the same measured value is
displayed as for the first cuvette.
4 Mark the cuvette with a marker ring.

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4.1.2 Venting the sample
Air bubbles in the sample affect the measuring result to a
massive extent because they have a large scattering effect
on the incident light. Larger air bubbles cause sudden
changes in the measured values whereas smaller air bub-
bles are recorded by the instrument as turbidity. Therefore,
avoid or remove air bubbles:
Avoiding or remov-
ing air bubbles
zDuring sampling, ensure all movement is kept to a mini-
mum
zIf necessary, vent the sample (ultrasonic baths, heating or
adding a surface-active substance to reduce the surface
tension)
zUse a pour-through vessel.

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4.2 Measuring turbidity
4.2.1 Measuring methods of the Turb 555 and
Turb 555 IR
Measuring system The measuring system consists of a light source, the cuvette
with the sample, a beam splitter and a total of four light de-
tectors:
1Light source: Tungsten lamp (Turb 555) or
infrared light source (Turb 555 IR)
2Reference detector
3Lens
4Cell with sample
5Beam splitter
6Transmission detector for low transmission (high
turbidity)
7Transmission detector for high transmission (low
turbidity)
8Nephelometric detector
123 4
5
6
7
8