Omega TRH444 User guide

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TRH444 Portable Turbidity Meter

Page 2

Page 3

Instruction Manual

Portable Turbidity Meter

Index

2. Specifications .......................................................3

3. Product Description ..........................................................4

4. Principles ..................................................................5

5. Turbidity Standard ...........................................................7

6. Techniques .................................................................8

7. Equipment Operation

Basic Operations ...........................................................10

Turning On the equipment ....................................................10

Proceedures for Set Up ......................................................11

Turbidity

Proceedures for Set Up ......................................................12

Proceedures for calibration ....................................................14

Proceedurs for Read .........................................................17

Proceedures for Manual Calibration .............................................18

Proceedures for Register Read ................................................19

Proceedures for Register Erasing ...............................................20

Turning Off the equipment ....................................................21

TRH444

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Accessories Supplied with equipment

Instruction manual in English

Stabilized Primary Std Formazine (3 vials) Vial Kit 3 units Carrying Case

Optional Accessories

AC Adapter

CDH-30PW

Application

Read Turbidity

Display

Alphanumeric 2 Lines x 16 Characters

Turbidity Range 0 to 1000 NTU (automatically)

from 0.01 to 10.00 NTU (selectable Range 1) from 0.01 to 100 NTU (selectable Range 2) from 0.01 to1000 NTU (selectable Range 3)

Sulphate Range

from 0 to 70 mg/L

Resolution

0.01 / 0.1 / 1

Relative Precision

0.01 % (full scale)

Calibration Parameters

Automatic / Manual

Light Source

LED 890 nm (NIR)

Detector

Photocell

Case protection

IP-67

Vial (Ø x h)

24.5 mm x 60 mm

Mínimum Sample Volume

20 mL

Power

Battery 9 Vcc

Battery Life

60 hours

Dimensions (LAP)

103 x 217 x 81 mm

Weight

569 g

Specifications

IP- 7

Secondary Standard (Gel) 3vials (0.1, 10 & 90NTU) Model TRSS-444

1000NTU (Model TRS-444)

Model TRV-444

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Seleção

Entra

Escape

Product Description

Description

1 - Display: Alphanumeric 2 Lines x 16 characters

2 - Keyboard: with 3 Tactile membrane keys

Escape

Seleção

Entra

Key Select the menu option, flashing option.

Key Turns On the instrument and also confirms the flashing option.

Key goes back one screen for every touch and also allows to access instrument shut down screen.

3 - Vial

4 - AC Adapter inlet, model CDH-30PW (Optional).

5 - Battery compartnment cover lid.

6 - 9 VCC Battery (included)

7 - RS-232 Serial Output

8 - Covering caps for classified areas use.

9 - IP-67 Protection lid.

Important:

7 8

Carrying Case

IP-67

For protection , it is necessary to use lids as shown at above picture, items 8 & 9.

This instrument allows connection thru the power line by an AC Adapter Model CDH-30PW (optional) 90-240Vac (50/60Hz)

! Do not use any other AC Adapter as it may damage the

instrument!

! Instrument floats when dropped in water.

Supplied with the instrument: Carrying Case, 3 Glass Vials (TRV-444), 3 Secondary Standard Gel Vials(<0.1, 9 & 90NTU Vials) and 1000NTU Stabilized Standard Solution (100ml.).

Accessories: TRV-444 -3 Glass Vials TRSS-444 - Secondary Standards Gel (<0.1, 10, 100 & 800NTU Vials) TRS-444 - Primary Standard Bottle of 1000NTU Formazine (250ml)

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Turbidity Method

through Solids.

defined as Homogenous or Monophase mixtures are any set of substances that presents an unified visual aspect (also called and Heterogenous or Polyphase mixtures are those where it is possible to confirm the presence of more then one visual aspect (also called Suspensions). This way, if noticed in a certain liquid a transparency lower than usually know, this is the presence beginning of any solid product in suspension, that defines the system as heterogeneous. The relation to this heterogeneous is how the turbidity concept is established. This turns to be a parameter that describes this quantity of suspended solid material in liquid being as is the . Turbidity consists in evaluation of the quantity of particles presence in such a liquid sample, from the comparison of transparency degree/turbidity with a standard, with a know value, using a light. We denote that hazel liquids are colloidal materials, presenting Tyndall effect, that consists of light spreading when it goes thru a colloid. It is know that the light when hitting a material it can reflect, refract or absorbed. As reflection is an inevitable phenomenon and common to any optical interaction, we must pay attention to two other phenomenons, as absorption is related to color and turbidity alters the refraction thru the working fluid. Digimed turbidimeters are nephelometric type, or simply nephelometric, that evaluate the Tyndall light spacing at 90° of the light hitting the sample.

Principles

he measured Turbidity of a determined sample, is the reading referred by light dispersity and absorsion that goes thru the sample.

Turbidity does not mean suspended solids measurement, but a effect determination of light refracted

To understand turbidity it is helpful to think about the characteristics of mixture between substances. It is

Solutions)

bigger bigger suspended solid quantity

Color Compensation

In order to avoid interference caused by the color components of the mixture being analyzed, the light used at the nephelometric instrument in general presents closes to infra red range, as this range has relatively low Material absorption, increasing the light sensibility. So it is possible an efficient measurement of the liquid turbidity, as the turbidity measure at this instrument is done using the difference between the hitting light and the detected light at a silicium photodiode, placed in right angle to the hitting light, that transforms the transmitted light by the sample, in a tension signal proportional to Tyndal light source, being this light intensity compared to the emitted light by the source (LED). The color compensation is done by signal conditioning of two photo-cells, transmittance and nephelometric, These area equalized in algorithm that performs the color compensation.

Sugar Reading

Internally at the equipment there is a curve for sugar analysis that can be selected during Set Up operation.

Vial

Light Source “ NIR”

90°

Reflected Light @ 90°

Detector

Transmited Light

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some, the most important, is the absortion caused by the sample color. So it is essential to work in a wavelenght range where this absortion is minimum (near infrared), as if we worked at a visible electromagnetical spectrum, this color interference certainly would decisively affect the results of the turbidity quantity, it can be used many types of comparison standard, being the nephelometric Turbidity Unit (NTU) the most usual one, developed from formazine standard suspensions. So, it is possible to have a a comparison standard scale between both materials, being possible to evaluate the turbidity with precision.

Fuctuations Compensation at Readings

For signal fluctuations compensation emitted by the photocell caused by any particle with irregular dimension, the Digimed turbidity meter execute the average reading during a time interval of 5s.. Considering the last 45 readings average executed during a maximum time interval of 20s., related to the turbidity to be measured.

Principles (cont.)

s the dettection involvs the difference between the light hitting the vial and the transmitted by the sample located at the vial, it is convinient to minimize the effects that diminishs the transmitted light intensity, between

5 s

1 s

Average

Automatic Range

Selection

14s

Biographic References Bela G. Lipták (editor in chief) Analytical Instrumentation; Howard A. Strobel and William R. Heineman, Chemical Instrumentation, A Systematic Approach.

Calculation

Result

Indication

NTU

Page 8

Turbidity Standards

Instructions on how to prepare the calibration solutions

1. Standard Zero

In order to obtain a turbidity close to Zero, use a good quality deionized or distilled water and filter it twice in a roll, using a 0.2

(Blank). Note: this water will be used to dilute the standard.

2. Standard Solutions

The instrument is supplied with a 100mL bottle of 1000NTU Stabilized Standard Solution, model# TRS-444, for dilution and calibration purpose.

Attention: if the Standard (DM-S14AK-100) had been stored for some time, shake the bottle strongly to mix the solution, then let it seat for about 15minutes, then start to manipulate below standards.

1 - Necessary Materials:

1.1 - 1 Volumetric Flask 100 mL

1 Volumetric Pipette 50 mL

2 L Distilled or Deionized Water, Filtered (0.2 µm)

2 - Calibration Solution 500 NTU

2.1 - In a 100ml Volumetric Flask, using the Volumetric Pipette add 50ml of 1000NTU Stabilized Standard

Solution.

2.2 - Add filtered water up to the mark on the flask.

2.3 - Before using the solution mix it by gently inverting the flask several times. Avoid creating bubbles.

2.4 - The Solution is Valid for 15 days.

Note:

place.

µm filter and theorically you will obtain a water with 0.12NTU, that can be considered Zero

For best storage conditions place the solution in a dark bottle and store it in a fresh and dark

3 - Calibration Solution 100 NTU

3.1 - In a 100ml Volumetric Flask, using the Volumetric Pipette add 10ml of 1000NTU Stabilized Standard

Solution.

3.2 - Add filtered water up to the mark on the flask.

3.3 - Before using the solution mix it by gently inverting the flask several times. Avoid creating bubbles.

3.4 - The Solution is Valid for 10 days.

3.5 - After its use, discharge the solution.

Note:

place.

4 - Calibration Solution 10 NTU

4.1 - In a 100ml Volumetric Flask, using the Volumetric Pipette add 1ml of 1000NTU Stabilized Standard

Solution.

4.2 - Add filtered water up to the mark on the flask.

4.3 - Before using the solution mix it by gently inverting the flask several times. Avoid creating bubbles.

4.4 - Stir it manually for before using it.

4.4 - The Solution is Valid for 5 days.

4.5 - After its use, discharge the solution.

Place.

For best storage conditions place the solution in a dark bottle and store it in a fresh and dark

Note:

For best storage conditions place the solution in a dark bottle and store it in a fresh and dark

Attention: for TURBIDITY, this instrument MUST BE calibrated using Formazine Standard and cannot be calibrated using Polymers!!!

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Techniques

For the most accurate results follow the steps below:

a. Use vials extremely clean on the inside and outside.

b. Fill the vial to the top to eliminate any bubble. Fill carefully to avoid

creating bubbles and to insure that the sample is homogeneous.

c. After filling the vial, dry it with a soft, lint-free absorbent paper to remove external

condensation caused by variation in temperature.

d. Using one drop of silicone oil, clean the external portion of the cuvette, this will

eliminate any small scratches (this is necessary for low Readings ONLY, below

20NTU).

Note:

e. Observe cautiously for the presence of bubbles and micro bubbles in the sample.

Bubbles are not desired! Bubbles will not disperse if the sample is allowed to rest, the particles in the sample will settle, altering the real turbidity value, so do not

leave the sample to rest!

Instructions to apply: place one drop of silicone oil on the outside of

the vial, using a cloth spread the oil, creating an uniform oil film at the surface.

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Techniques (cont.)

1. Zero Turbidity

A. It is very difficult to locate a water without turbidity. What is done on practice is to filter 2 times (2x) a deionized or

distilled water using a 0.2 µm (0.2 micro meter) paper filter. So we can consider this water with turbidity of

0.12 NTU.

B. The water used as Zero, is used to dilute standards up to 40 NTU. Above this value, use can use normal deionized water.

2 - Technical Measurement Considerations for Low Turbidity Readings - Range 0 to 10 NTU

A. Use an extremely clean vial (inside and outside). After its use, never leave any solution inside the vial.

B. Fill the vial, do not overfill! Fill the most possible, this procedure avoids bubbles formation.

C. After filling it and closing the cap, dry the external surface of the vial using a lint free absorbent paper in order to

avoid a possible condensation caused by temperature variation. DO NOT touch the vilas with your fingers!!!!!!

D. Always use matching Vials. When one of the vials break or needs to be replaced, it is necessary to replace the hole set! DO NOT replace only one vial of a set!

E. Verify for bubbles or micro bubbles presence inside the sample, as they are not desired. In case they are Noticed, try to eliminate them.

Note: and this will alter the real turbidity value

Never let the sample to rest, as the particlues will decantate .

F. If obtained low values, below the expected between 0.12 to 10.0 NTU, the vial could be dirty. Remove it, clean and repeat the reading.

G. Keep the vial always at the same position, paying attention to the its direction, from calibration until the reading. Note that the vial has a vertical white line mark and when inserting the vial at the compartnment, make sure that this mark matches the mark trace located at the vial compartnment!

H. Recalibrate the equipment when the reading is lower than the first calibration point (0.12 NTU).

3 - Technical Measurement Considerations for Turbidity Readings - Range 0 to 100 NTU

A. Prepare the calibration standards (Standard 10 NTU and Standard 100 NTU) as indicated on page 7.

B. In order to obtain better precision results it is recommended to calibrate using above standards.

4 - Technical Measurement Consideratins for Turbidity Readings - Range 0 to 1000 NTU

A. Prepare the calibration standards (Standard 10 NTU, Standard 100 NTU and Standard 500NTU) as indicated

on page 7.

B. In order to obtain better precision results it is recommended to calibrate using above standards.

Vials

The turbidity instrument TRH444, leaves the factory with 3 matching vials. This allows to use them for caibration or reading, any of the vials.

NOTE:

with the new set, as they can present differences at reading values.

in case one of the vials breaks it is necessary to purchase a new vial kit (TRV-444) do not mix the old vials

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Equipment Operation

Basic Operations

1 - The software offers self explanatory menus with easy user interaction. The menu flashes at selected option (represented at this manual in .

Use

key to alter the flashing option of the menu then press key to confirm the option.

Blue Color

<ENTER>

2 - In case of a mistake, or to change data or to return to prior menu, press . At every touch the screen will be moved back to prior screen. But in order to exit the reading mode, user must press and hold

3 - The equipment stores all configurations in a non-volatile memory (E PROM). Even when turned off, the last stored characteristics established for your work will be sustained.

4 - The equipment automatically monitors the battery charge. In order to save battery, the instrument will turn itself off after 2 minutes of inactivity. After the reading is completed, user must press

reading, otherwise the equipment will turn itself off after 2 minutes.

key so the program can understand that the user really desires to exist this mode.

<ENTER>

key

to proceed to the next

Turning On the equipment

1 - Turn on the equipment by pressing . The display will show the main menu.

<ENTER>

key

Press key in order to turn on the

<ENTER>

instrument

TURBIDIMETER MODEL TRH444

TURBIDIMETER

/Set UpRead

Page 12

Equipment Operation (cont.)

Set Up Proceedures

The instrument allows the user to choose the Range (programable) and also to pick the calibration values for the Standard Solutions, that can be programmed while at Set Up Operation. See below table for possible calibration values based on each calibration point ranges :

Calibration Minimum Value Maximum Value

1st Point 0.01NTU 1.00NTU 2sd Point 8.00NTU 10.00NTU 3th Point 80.0NTU 100NTU 4th Point 200NTU 900NTU

Page 13

Equipment Operation - Turbidity Set Up

Set Up Proceedures

Press key in order to turn on the instrument and to

<ENTER>

access the main menu as shown. Press key until option flashes, then press key to Confirm option chosen.

Set Up

Press key until desired language option flashes, then press key to confirm the option chosen.

<ENTER>

<ENTER>

TURBIDIMETER

READ/SET UP

LANGUAGE:PORT./

ENGLISH

/SPANISH

<SELECT> Turbidity

Press key until desired option flashes ( ), then press key to confirm the option chosen.

Press key until desired option flashes, then press

<ENTER>

can read turbidity in water or sugar.

Press key until desired unit flashes, then press

<ENTER>

Press key until desired resolution option flashes, then press key to confirm the option chosen.

Note A: Every time you see the symbols “ ” or “<”, that means that the user can adjust the displayed value up or down. To increase the value press key until “ ” flashes, then press to confirm, then press key and at every touch the value will increase by one unit. To decrease the value press key until “ ” flashes, then press to confirm, then press key and at every touch the value will decrease by one unit. If a mistake is made, press key to return and correct the value! If user press and holds key, the units will move faster, but be carreful when gets closer to the desired number, as you canmiss it and if that happens, press

<ESC>

<ENTER>

key to confirm the option chosen. This instrument

key to confirm the option chosen.

Select the Reding Range mode by pressing key until desired option flashes then press

Auto

key. range will work the instrument full range.

Ranges Value: Range 1 - 0 to 10 NTU Range 2 - 0 to 100 NTU Range 3 - 0 to 1000 NTU

<ENTER>

NOTE:

user to calibrate the instrument based on a known value.

ATTENTION:

calibration using Formazine Standards. It allows small adjustment of the turbidity curve, after the reading operation is performed. Refer to Page 21.

The Manual CALIBRATION function allows the

This calibration does not replace the

<SEL>

<ENT>

<SEL>

<ENT>

<ESC>

<SEL>

key to move back and correct the mistake.

<SEL>

<ENTER>

READING OF:

/TURBIDIT SULPHAT

READING OF:

/SUGARWATER

UNIT:

/ASBC/EBC/FTUNTU

RANGES

/MANUAL AUTO

RANGES:

1 / 2 / 3

TURBIDITY

0 to 1000 NTU

RESOLUTION

1 / / 0.010.1

CALIBRATION MANUAL/AUTO

CALIBRATION

Pt.1 0.2 NTU <>

CALIBRATION

Pt.2 10.0 NTU <>

CALIBRATION

Pt.3 100 NTU <>

CALIBRATION

Pt.4 500 NTU <>

Go to Page 13

Go to Page 18

Page 14

Equipment Operation - Turbidity Set Up (cont.)

From Page 12

Press key until desired option flashes, then

<ENTER>

press key to confirm the option chosen. This option is offered to user, so the instrument can be calibrated as when it left factory. Say user is in a location where it is not possible to work with Standards or does not have the standards, choose Yes and confirm it and the instrument will calibrate as when left the facotry.

DEFAULT CALIBR.?

/Yes No

CONFIRM ?

/Yes No

User can activate or not the RS 232 output. Press key until desired option flashes, then

press key to confirm the option chosen.

<ENTER>

RS232

/On Off

User can choose between PC or Printer. Press key until desired option flashes, then

press key to confirm the option chosen.

<ENTER>

Statistics calculation can be chosen or not. Press key until desired option flashes, then

press key to confirm the option chosen.

<ENTER>

If user desires to store data into memory (up to 99points), must be selected. Press key until desired option flashes, then press key To confirm the option chosen. Refer to page 22 for further details.

Yes <SELECT>

<ENTER>

RS232

PC / PRINTER

SPEED (100bps)

12 24 48 96

STATISTICS?

/Yes No

WAIT

...............

Page 15

Equipment Operation - Turbidity Calibration

Calibration Proceedures

Press key until option flashes, then press

<ENTER>

Press key until option flashes, then press key to confirm option chosen.

<SELECT> Read

key to confirm option chosen.

<SELECT> Calibrate

<ENTER>

User will still have the option to accept every calibration point chosen during Set Up Operation. Press

<ENTER>

Press until desired option flashes, then press key to confirm it.

Place vial with Standard 0.17NTU at compartnment, then press key. Make sure the white vertical line of the vial matches the mark at the vial compartnment then push slowly the vial into the compartnment, all the way to the end.

until desired option flashes, then press

key to confirm it.

<ENTER>

TURBIDIMETER

/READ SET UP

TURBIDIMETER

READ/CALIBRATE

POINT:0.17 NTU CALIBRATE? /Y N

CONFIRM ?

/ Yes No

PLACE STANDARD

0.2 NTU

@ VIAL COMPARTN.

Ready ?

WAIT

STABILIZATION

The instrument program, verifies if the standard is within conformance. Press key. Then user can proceed with operation or go back and replace the standard.

Note: if any problem occurs during the Reading operation, the display will show: ATTENTION !VERIFY VIAL <ENTER>

User will still have the option to accept every calibration point chosen during Set Up Operation. Press

<ENTER>

Press until desired option flashes, then press key to confirm it.

Place vial with Standard 10.0NTU at compartnment, then press key. Make sure the white vertical line of the vial matches the mark at the vial compartnment then push slowly the vial into the compartnment, all the way to the end.

The instrument program, verifies if the standard is within conformance. Press key. Then user can proceed with operation or go back and replace the standard.

until desired option flashes, then press

key to confirm it.

<ENTER>

STAND. NOT IN

CONFORM. <ENTER>

CONFIRM STANDARD

/ Yes No

POINT:10.0 NTU CALIBRATE? /Y N

CONFIRM?

/ Yes No

PALCE STANDARD

10.0 NTU

@ VIAL COMPARTN.

Ready ?

WAIT

STABILIZATION

STAND. NOT IN

CONFORM.<ENTER>

Go to page 15

Note: if any problem occurs during the Reading operation, the display will show: ATTENTION ! VERIFY VIAL <ENTER>

Go to Page 15

CONFIRM STANDARD

/ Yes No

Page 16

Equipment Operation-Turbidity Calibrat.(cont.)

Calibration Proceedures

From Page 14

User will still have the option to accept every calibration point chosen during Set Up Operation. Press

<ENTER>

Press until desired option flashes, then press key to confirm it.

Place vial with Standard 100NTU at compartnment, then press key. Make sure the white vertical line of the vial matches the mark at the vial compartnment then push slowly the vial into the compartnment, all the way to the end.

until desired option flashes, then press

key to confirm it.

<ENTER>

POINT:100 NTU

CALIBRATE? /Y N

PLACE STANDARD

@ VIAL COMPARTN.

STABILIZATION

The instrument program, verifies if the standard is within conformance. Press key. Then user can proceed with operation or go back and replace the standard.

Note: if any problem occurs during the Reading operation, the display will show: ATTENTION ! VERIFY VIAL <ENTER>

<ENTER>

CONFORM.<ENTER>

CONFIRM STAND.

CONFIRM?

/ Y N

100 NTU

Ready ?

WAIT

STD NOT IN

/ Yes No

Go to Page 16

Attention: for TURBIDITY, this instrument MUST BE calibrated using Formazine Standard and cannot be calibrated using Polymers!!!

Page 17

Equipment Operation - Turbidity Calibrat.(cont.)

Calibration Proceedure

From Page 15

User will still have the option to accept every calibration point chosen during Set Up Operation. Press

<ENTER>

Press until desired option flashes, then press key to confirm it.

Place vial with Standard 500NTU at compartnment, then press key. Make sure the white vertical line of the vial matches the mark at the vial compartnment then push slowly the vial into the compartnment, all the way to the end.

The instrument program, verifies if the standard is within conformance. Press key. Then user can proceed with operation or go back and replace the standard.

Note: if any problem occurs during the Reading operation, the display will show: ATTENTION ! VERIFY VIAL <ENTER>

until desired option flashes, then press

key to confirm it.

<ENTER>

POINT:500 NTU

CALIBRATE? /Y N

CONFIRM?

/ Yes No

PLACE STANDARD

500 NTU

@ VIAL COMPARTN,

Ready ?

WAIT

STABILIZATION

SATANDARD NOT IN

CONFORM.<ENTER>

CONFIRM STANDARD

/ Yes No

If user is ready to measure the sample, place vial with sample at compartnment, then press key.<ENTER>

Go to Sample!

Ready ?

WAIT

READING

For a new reading, press or press and hold

instrument is left under Reading Mode, without pressing for another reading, it will turn itself off after 2 minutes, in order to save battery life!

key in order to exit Reading Mode. If

<ENTER>

-> 1.70 NTU

Attention: for TURBIDITY, this instrument MUST BE calibrated using Formazine Standard and cannot be calibrated using Polymers!!!

Page 18

Equipment Operation - Turbidity Read

Reading Proceedures

Press key until option flashes, then press

<ENTER>

Press key until option flashes, then press

<ENTER>

The option Register will only be displayed if user choose Yes for Register option during Set Up operation (page13)!

<SELECT> Read

key to confirm option chosen.

<SELECT> Read

key to confirm option chosen.

This option will only be displayed if RS-232 is On (chosen during Set Up operation). If chosen Off for RS-232, this option will not appear. User can adjust the Initial Sample number, refer to below instructions on how to change this number.

If user is ready to measure the sample, place vial with sample at compartnment, then press key. Make sure the white vertical line of the vial matches the mark at the vial compartnment then push slowly the vial into the compartnment, all the way to the end.

For a new reading, press or press and hold

instrument is left under Rading Mode, without pressing for another reading, it will turn itself off after 2 minutes, in order to save battery life!

key in order to exit Reading Mode. If

<ENTER>

TURBIDIMETER

/SET UPREAD

TURBIDIMETER

/Reg./CalibrRead

INITIAL SAMPLE:

N.: 1 <>

Go to Sample!

Ready ?

WAIT

READING

-> 1.70 NTU

If the sample being measured is above equipment range, user

will see the following screen. Please verify the sample used and change for a valid value, within equipment range.

-> ------ NTU

Note A: Every time you see the symbols “ ” or “<”, that means that the user can adjust the displayed value up or down. To increase the value press key until “ ” flashes, then press to confirm, then press key and at every touch the value will increase by one unit. To decrease the value press key until “<” flashes, then press to confirm, then press key and at every touch the value will decrease by one unit. If a mistake is made, press key to return and correct the value! If user press and holds key, the units will move faster, but be carreful when gets closer to the desired number, as you canmiss it and if that happens, press

<ESC>

<ENT>

key to move back and correct the mistake.

<SEL>

<ESC>

<SEL>

Page 19

Equipament Operation - Register

Reading Register Proceedure

This Meter offers 99 points of dataloging for Readings storage.In order to activate this function, user must choose option

YES when asked about Option the Sub menu Reg will not be

Displayed on the screen

Turn on the instrument by pressing <ENTER>

Press key until flashes, then press

<ENTER>

Press key until Flashes, Then press

<ENTER>

Press key until flashes, then press

<ENTER>

value to be stored!

Place the vial into the compartnment , then pess

<ENTER> to start Reading opertion.

to confirm.

to confirm. This procedure will allow Reading

TURBIDIMETER VERSION : V5a

TURBIDIMETER

Read/Set Up

TURBIDIMETER

Read/ /Cal.Reg.

/Cons./EraseRead

INITIAL SAMPLE:

N.: 1 <>

Go to Sample!

Ready ?

WAIT

READING

The Read value will be displayed, press

to memorize the value.

<SELECT> key

-> 1.70 NTU

WAIT

Press <ENTER>

To exit this mode, prss and hold key.

key to start a new the Reading

1.70 NTU

User can also Consult saved Readings, simple choose the option REGISTER (see above menu) and press

key to display every Reading stored!<ENTER>

Page 20

Erase Register Proceedure

Equipment Operation - Register (cont.)

Turn on the instrument by pressing <ENTER>

Press key until flashes, then press

<ENTER>

Press key until Flashes, then press

<ENTER>

Press key until flashes, then press

<ENTER>

Registered values!

Press key until flashes, then press

<ENTER>

This is your last chance NOT to erase the stored values!

to confirm.

to confirm. This procedure will erase ALL

to confirm.

TURBIDIMETER VERSION : V5a

TURBIDIMETER

Read/Set Up

TURBIDIMETER

Read/ /Cal.Reg.

/Cons./EraseRead

CONFIRM ?

/ Yes No

WAIT

...............

Page 21

Equipment Operation - Turning Off

Turning Off the Equipment

1 - Press key repeatedly unitl the following message appears

TURN OFF? / Yes No

2 - Press key until flashes then press key to confirm and turn it off. Follow instructions below to turn the instrument off:

Press and hold key in order to exit the reading mode and access the main menu.

Press key to move back <ESCAPE>

TURBIDIMETER

->070 ppm

TURBIDIMETER

/CalibrateRead

Press key to move back<ESCAPE>

TURBIDIMETER

/Set UpRead

Press key in order to select option

<SELECT> Yes

(flashing), then press to confirm.

A message will display on the screen and the equipment will turn off.

<ENTER>

TURN OFF?

/ Yes No

GOOD BYE !

...............

Page 22

Page 23

M-4713/0908