Xylem WTW Turb 750 T Bedienungsanleitung

OPERATING MANUAL

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750 T

Turb

Turb®750 T

LABORATORY TURBIDIMETER

OPERATING MANUAL

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Turb®750 T

Printed in Germany.

Turb®750 T Contents

Turb®750 T - Contents

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Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Display and jack field. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

General operating principles . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Inserting a cell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Preparing the cell and sample . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Measuring the turbidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Maintenance, cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Turbidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

General data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Turbidity (Turb®750 IR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Turbidity (Turb®750 T) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

All current data for the Turb®750 T can be found on the Internet

under www.xylemanalytics.com:

Firmware

Operating manual

More detailed information can be found in the appendix of the

detailed operating manual on the CD-ROM provided.

Safety Turb®750 T

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Safety

Safety information Safety instructions point out dangers:

NOTE

indicates a possibly dangerous situation where goods might be

damaged if the actions mentioned are not taken.

Safe operation

Authorized use This meter is authorized exclusively for turbidity measurements in the labo-

ratory.

Only the operation and running of the meter according to the instructions and

technical specifications given in this operating manual is authorized (see

TECHNICAL DATA, page 17).

Any other use is considered unauthorized.

Display and jack field

Display The graphic display shows all information of the current measurement in the

measured value display. The illumination enables to read the display even in

the darkness.

WARNING

indicates a possibly dangerous situation that can lead to se-

rious (irreversible) injury or death if the safety instruction is

not followed.

CAUTION

indicates a possibly dangerous situation that can lead to

slight (reversible) injury if the safety instruction is not fol-

lowed.

CAUTION

Danger of eye damage by visible and invisible LED radiation.

In the cell shaft of the Turb®750 IR there are light emitting

diodes (LEDs) of the 1M class.

Do not look at the radiation using optical instruments.

With normal, authorized use there is no hazard.

Turb®750 T Power supply

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Socket field

Power supply

The Turb®750 T is supplied with power by the power pack included in the

scope of delivery. The batteries (4 batteries 1.5 V Mignon type AA) in the bat-

tery compartment supply the integrated clock with power when the power

supply is missing.

General operating principles

This section contains basic information on the operation of the Turb®750 T.

1 Status display indicators, e.g.:

[IRPC] = Intelligent reproducibility and plausibility check

[AQA] = Valid AQA check available

2 Measured value (with unit)

3 Status display indicators, e.g.

[3-P StdCAL] = Valid calibration available

(calibration type: 3-P StdCAL))

4 Status line with date and time

Turbidity

[IRPC] [AQA]

157.0

FNU

NTU

[3-P StdCAL]

15.01.20 16:12

1 USB-B (micro) interface

2 Power pack

3 RS232 serial interface

1 2

General operating principles Turb®750 T

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Operating modes Measurement

The display indicates measurement data in the measured value display

Calibration

The display indicates a calibration procedure with calibration information

Data transmission

The meter transmits measuring datasets or calibration records to the inter-

face

Configuration

The display indicates a menu with further menus, settings and functions

Keypad <M (9)>Switch to the measured value display

<CAL (4)>Start calibration

<QuickCAL (1)>Start simplified calibration with one standard.

<AQA (2)>Start checking the meter with AQA standards

<A-Z (5)_> Select the entry mode in an entry field

Numerical or alphanumerical entry

<A-Z (5)>Display the next digit in an entry field with active

alphanumeric entry

(same function as <V (6) >)

<START/ENTER (.)>Open menus / confirm entries /

start measurement

<MENU (7)>Call up the Configuration menu

(all settings are made here)

<On/Off> Switch the meter on or off

<PRT (8)>Output display contents to RS232 or USB interface

(e.g. print)

<STO (0)>Open the Store menu: <STO (0) >

Quick storing: 2 x <STO (0) >

<STO (0) _> Open the measured value memory

<V (6)>, <W (3)> Highlight menu items or selection;

Set values

<ESC> Switch to the next higher menu level /

cancel input

Entering numerals with the number keys (see ENTERING NUMERALS

WITH THE NUMBER KEYS, page 8).

Turb®750 T General operating principles

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Measured value

display

In the measured value display, open the menu with <MENU (7) >.

Menus and dialogs The menus for settings and dialogs in procedures contain further subele-

ments. The selection is done with the keys <V><W>.

The current selection is displayed inverse.

Menus

The name of the menu is displayed at the upper edge of the frame. Menus

are opened by confirming with <START/ENTER (.) >. Example:

Settings

Settings are indicated by a colon. The current setting is displayed on the

right-hand side. With <START/ENTER (.) >, the selection of the possible

settings is opened. Subsequently, the setting can be changed with

<V><W> and <START/ENTER (.) >.

Example:

Functions

Functions are designated by the name of the function. They are immedi-

ately carried out when you confirm them with <START/ENTER (.) >.

Example: display the Calibr. record function

(in the Turbidity menu).

Messages

Information or operating instructions are designated by the i symbol.

Turbidity

Timer

System

Measured value memory

Configuration

Language:English

Info

Display

Reset

Interface

Continue...

System

Calibr. record

Calibr. type 3-P StdCAL

Calibr. interval:90 d

Standard 10.0 FNU/NTU

AQA

Reset

Turbidity

Initial commissioning Turb®750 T

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They cannot be selected.

Example:

Entering numerals

with the number

keys

Keys with additional characters printed on (orange) are assigned doubly. In

the input fields you can directly enter digits with the orange number keys (e.g.

date and time). Complete entering a number with the key <START/ENTER

(.) >.

When entering numeric values with decimal separators (e.g. turbidity nominal

values), pressing <START/ENTER (.) > for the first time will set the decimal

separator. Pressing <START/ENTER (.) > for the second time will complete

the entering of the numeric value. The numeric value is always displayed with

decimal places and, if necessary, rounded.

Initial commissioning

Switching on the

meter

Press the <On/Off> key.

Setting the

language

The English language is set on delivery. Set a different language as follows:

Setting the date

and time Configuration The date and time are set in the menu,

/ System / Continue ... / Date/time.

i Insert standard

1000 FNU/NTU

i Press and hold <START>

i Align sample

Turbidity Calibration

The i indicates

info texts, e.g.

messages, notes or instruc-

tions

1 Open the Configuration menu with the <MENU (7) > key.

2 Open the Configuration / System / Language menu with the

<V><W> and <START/ENTER (.) > keys.

3 Select the required language with the <V><W> keys and confirm

with <START/ENTER (.) >.

4 Quit the menu with the <M (9) > key.

Turb®750 T Operation

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Operation

Inserting a cell

Before using a cell for the first time, determine and mark the suitable

measuring position for the cell (see PREPARING THE CELL, page 9).

Inserting a 28 mm

cell

Preparing the cell and sample

Preparing the cell Even completely clean quality cells exhibit tiny differences in their light trans-

mittance, e.g. inhomogeneities of the glass or small defects (e.g. scratches).

Therefore, guidelines for accurate and reproducible measurements (e.g. US

EPA) recommend that you always align the cell in the same way for

1 Push the dust cover (1) upward.

The cell shaft for 28 mm cells is open.

2 Insert the marked cell so that it is positioned on the bottom of

the cell shaft.

3 Align the cell marking (3) with the marking (4) of the cell shaft.

The cell is ready to be measured.

Operation Turb®750 T

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measuring with the aid of arrows printed on or markings. This refers to

sample cells and cells for calibration standards.

Prior to using a cell for the first time, the suitable position of the cell in the cell

shaft is determined and marked to make sure the optical path is not

disturbed. For the following measurements, the cell marking can just be

aligned with the meter marking.

The cell marking should be checked regularly and renewed as necessary.

The cell can be used until no suitable position for the optical path can be

found.

Determining a

suitable position in

the cell shaft

Marking a cell

Preparing 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

bubbles are recorded by the instrument as turbidity. Therefore, avoid or

remove air bubbles:

We recommend that you do not treat any scratches in the cell

with oily liquids (not even with so-called "special silicone oils").

They could unnecessarily soil the meter and your working envi-

ronment. The optimum measurement accuracy is ensured by

aligning the cells. Scratched cells have to be replaced.

1 Clean the cell.

2 Stick the label for the marking onto the cell cap.

3 Fill the cell with a homogeneous solution (e.g. calibration standard

10.0 NTU).

4 Insert the cell.

5Press and hold the <START/ENTER (.) > key.

Turn the cell slowly and check the measured value:

– The measured value at the position should be no maximum.

– At the directly neighboring positions there should not be any

sudden changes of the measured values. The deviations of

measured values at the neighboring positions should not

exceed the following values:

Measured value < 1 NTU: max. +/- 0.02 NTU

Measured value > 1 NTU: max. +/- 2 %

6 Release the <START/ENTER (.) > key.

Measurement starts. The measured value is displayed.

7 Mark the determined position (aligning) of the cell on the label.

The cell is now prepared for all following measuring and calibration

actions.

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