Omega DOTX-441 User guide

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Page 1

DOTX441 Dissolved Oxygen Analyzer

Page 2

Page 3

Instruction Manual

Dissolved Oxygen Analyzer

DOTX441

Index

Specifications..........................................................3

Mechanical Description..................................................4

Typical Installation......................................................5

Equipment Installation...................................................6

Electrical Schematics ...................................................9

Equipment Operation...................................................10

Equipment Operation DO - Set Up ........................................13

Equipment Operation DO - Calibration.....................................21

Equipment Operation DO - Read .........................................22

Maintenance .........................................................23

Cell Maintenance......................................................24

Protocol Communication................................................29

Page 4

Application

Analyzer/Tansmiter/Dissolved Oxygen Controler Micro processed

GENERAL

Case Cast Aluminum SAE 323 Finishing Electrostatic Epoxy Paint Electrical Connection Connector Barr – Conexell Type Cable Inlet Cable Knockout 1/2" ( 2 x ) Assembly 2" Tube or Flat Surface Identification (TAG) SS Tag Enclosure IP-68 Power Consumption 3.5 VA Weight 1.9 Kg Electrical Power 90 to 240 VAC ( 50 / 60 Hz) Working Temperature 5 to 40ºC Relative Humidity 20 to 80 %

Analyzer / Transmiter

Display Alphanumeric 2 lines x 16 characters Range 0 to 60 mgO2/L Resolution 0.1 or 0.01 Relative Precision 0.02 % (full scale) Working Temperature 50 ºC Auto Temperature Compensation 50 ºC Measuring Princíple Clark Polarographic Cell Response Time 20 s (Programmable) Barometric Pressure Compensation Up to 10.000 m

Signal Output

Analogic 4 to 20 mA w/ programmable output range

for all Reading range Galvanic Isolation 2000 VAC ( by opto coupler ) Line Resistance 1K3 Ohms

Controller

Actuation Type Frequency Modulation, P+Di Set-Points 2 independent from 0 to 100% of scale Outputs 2 control ON-OFF, programmable for Alarm or

Actuation P+Di Control for Automatic Cleaning Timer ON-OFF, for periods up to 99 seconds, and

in intervals up to 99 hours Cell Model: DOE-441 Type Immersion Body Material Polypropylene (PP) or SS 316(others upon request) Maximum Temperature (@ Atm. Press.) 50 ºC Body Length 1500 mm (standard, others upon request) Auto Cleaning System Activated by a solenoid valve

Accessories

Instruction Manual on a CD SS 304 clamps with nuts and bolds

Specificatons

Page 5

Slots Connections

1 Dissolved Oxygen Cell Shield 2 & 3

Measuring Sensor

4 & 5

Thermocompensator

6 & 7

Transmission Output mA - 1

8 & 9

Transmission Output mA - 2

10 & 11

Digital Output Communication RS - 485

12 & 13

Set-Point 3 ( S3 ) Contacts – Auto Cleaning

14 & 15

Set-Point 2 ( S2 ) Contacts

16 & 17

Set-Point 1 ( S1 ) Contacts

Grounding

19 & 20

Electrical Power from 90 thru 240 VAC 50 / 60 Hz

General Fuse (3 A )

Set-Point 1 Fuse (1 A )

F3 Set- Point 2 Fuse (1 A ) F4 Set- Point 3 Fuse (1 A )

Mechanical Description

The equipment is offered in compact case in cast aluminum. SAE 323, with low oxidation grade, with anti

corrosion treatment and finished with electrostatic epoxy paint. Reduced dimensions and very light weight, it is build under IP-68 protection. User will find under the same case: the local indicator, Analyzer, Transmitter, Controller and the Register, making the equipment compact , rough and of ease operation. The case installation can be done in 2” tube or Flat Surface. Electrical connection is done by a terminal barr located in the case’s back housing of the instrument, with cable Entrance thru 2 cable press of ½ ” BSP. In one the instrument sides, user will find an identification tag in SS 316, which covers the external controls, sealed in Order to guarantee the case protection.

190

126

180

125

Items Description

1 - Display: Alphanumeric back lighted 2 Lines x 16 characters 2 - Keyboard: 3 keys key Select the desired function, flashing option. key Confirms the selection chosen by Select key. key . 3 - Insterconnection Board (located inside the back lid)

<SEL>

<ENT>

<ESC> returns to prior menu

DOTX441DOTX441

THERMO

Gre

Yel

Black

Red

Shie

CN1

F4F4

RS485

- - ++

mA-2

- - ++ - -

mA-1

F3F3

F2F2 F1F1

CN3CN2 CN4

SEL.

TAG

ENT.

ESC.

2 x Æ ½" BSP 14 tpi

*Dimensions in millimeters

Page 6

Typical Installation

2” Tube Installation

2” Tube

Cable Knockout

Clamp (SS)

Flat Surface Installation

Support base (aluminum SAE 323)

Cable Knockout

Support base (aluminum SAE 323)

Flat Surface

Important: Install the equipment in a strategic location that allows ease access and maintenance and avoid

exposing it direct to solar rays, besides equipment’s overheating causing eventual damage, the Liquid Crystal Display will also loose it’s sensibility, fading the display.

Page 7

Equipment Installation

In order to achieve the best performance of OMEGA’s Continuous Analyzer, it is crucial to perform it’s correct installation. Follow instructions below:

1. Remove the equipment from the box, verify if any damage was caused by it’s transportation.

2. Install the case in a strategical location, for ease access and maintenance, exempt of vibrations and vapors.

3. Avoid exposing the equipment direct to solar rays. If necessary use some kind of protection.

4. After connecting the cable with it’s respective terminals, proceed with terminal barr connection, located in

the back panel of the case.

5. Inspect all electrical installation in order to certify that all connections are correct.

6. Verify power electrical source in order to make sure it’s voltage value.

7. Turn on circuit breakers of the electrical box.

5.1 Important Recommendations

1 - The equipment electrical power must be independent from others system components. Being so, the cable that will power the Control Valves, Solenoids, Alarms, and others, MUST BE CONNECTED DIRECT TO DISTRIBUTION BOX, and "never" to the equipment slots.

Distribution Box

F2 F1

DOTX441DOTX441

TO-401

THERMO

Gre

Yel

Black

Red

Shie

CN1

To Contacts NO

RS485

- +

mA-2

- + -

mA-1

CN3CN2 CN4

13,15 & 17

R S T N

Controls or Alarms

Grounding

2 - Verify if the cable knockouts of the equipment and probes are firmly attached to its respective interconnection cable. This proceeding is necessary in order to preserve IP-68 protection. 3 - Be careful with humidity!. It will diminish the impedance generating measurement errors. Verify the cable knockouts and if necessary, dry them using a hair dryer.

4 - Replace periodically the sealing O-Rings in order to guarantee a good sealing of the enclosure. 5 - Do not cut or mend the interconnection cables. Under the cable shield there is a semiconductor coating

material, used to eliminate electrostatic interference at the cable.

Semiconductor Cap

Conductor

Covering

6 - ON-OFF are , offering innumerous advantages for the equipment, such as: no

outputs thyristor type

Shield

Isolation (polypropylene)

d = 5 mm

min

sparks presence, faster commutation, noise practically inexistent, no presence of RF interference and many more.

The outputs can commute any charge, since they are

Page 8

Equipment Installation (cont.)

5.2 Dissolved Oxygen Industrial probe Characteristics - DOE-441

Dissolved Oxygen Immersion Probes for industrial application, consists typically in an adequate installation hardware, whose function is to hold and protect the Dissolved Oxygen industrial cell model: and ti’s respective connections. In order to choose the adequate material to it’s body construction will depend on work’s chemical aggressiveness and temperature of the process. Find below some materials available: a) PP (Polypropylene) - Model DOE-441 (Standard) b) Stainless Steel 316 - Model DOE-441-S (Special Order) and others upon request. All connections offer guaranteed sealing by Nitrilic Rubber O-Rings, FKM or others. The electrical connection is done thru a terminal barr in an IP-68 case protection, with cables going thru a ½” NPT hole or ½” cable pres and the interconnection of the Probe’s terminal barr to the cell being done by PA type connector. It is recommended that the connection cable from the probe to the equipment offers the shortest length possible, in order to avoid RF interference and noise problems. The installation of the Probe can be done by a pole or flange and the insertion length is defined based on the need of measure to be taken, being supplied with standard of h=1500 mm.

DOE-441-R

Cleaning Injector Tip

1500

Quick Connect

NTCNTC

NTCNTC AnodeAnode

CathodeCathode

ShieldShield

Analyzer (8)

Distribution Box (T)

(Green) (Yellow)

(Red)

(Black)

Interconnection BarrInterconnection Barr

Located internally at the Electrical Connection Box

Page 9

Equipment Installation (cont.)

5.3 Automatic Cleaning System hose installation

Probes DOE-441, are supplied with Automatic Cleaning System, whose function is to remove any clogging at the membrane of the Dissolved Oxygen’s Cell. Typically, the cleaning is done by pressurized air jet (3 bar maximum). The cleaning is executed a solenoid valve activation controlled by the equipment. The time and duration of the cleaning can be programmed, by accessing the Set Up operation of the equipment’s program. At slots 12 & 13, there is a thyristor contact (S3) that commands the Solenoid for the cleaning system.

Automatic Timer

DO Signal

Cleaning Solution or Air

Solenoid Valve

DOTX441

Injector Tip

DO Cell

ø1/4” x 1/8” Parker U-42 Hose Installation

Insert the hose at the connection (quick connect) all the way down. Metal holdings located inside of the ring will attach and hold the hose, push the ring following the same direction as arrow “L” shown on below illustration. Never pull the hose, as it will damage the metal clips.

1500

Quick Connect

Analyzer (8)

Distribution Box (T)

Cleaning Injector Tip

Important:

When noticed a drop in sensibility during calibration, frequently deviations of calibrated value or even reading oscillations, it is necessary to proceed with a cell maintenance. The steps in order to perform this operation, you will find on chapter 12 - Cell Maintenance, page:22.

Page 10

Electrical Installation

CONTRÔLOrALARMS

TT NN

ELECTRICAL

DISTRIBUTION

BOX

1919

2020

1818

AUTOMATIC

CLEANING

GRÁPHIC REGISTER

OR PLC OR SDLC

PUMP

PCPC

PUMP

GROUNDINGGROUNDING

CABLECABLE

2020

1919

Note: Note:

It is important to use phase and cables

different for the equipment and

control valves or alarms.

CABLECABLE

CABLE CABLE

1818

1717

1616

1515

1414

CONVERTERCONVERTER

RS-485 RS-485

/ /

CABLECABLE

1313

1212

RS-232RS-232

CABLECABLE

CABOLECABOLE

1111

1010

CABLECABLE

CN2CN2 CN3CN3 CN4CN4

NTCNTC

GreenGreen

YellowYellow

Black Black

Red Red

(Anode)(Anode)

(Cathode)(Cathode)

ShieldShield

CELLCELL

2020

1818

1919

ACAC

1717

1414

1212

1313

1515

F2F2 F1F1

F3F3

F4F4

1616

CN3CN3CN2CN2 CN4CN4

S2S2

S3S3

S1S1

1010

-- ++

TERMOTERMO

GrGr

NoNoCCNoNo

mA-2mA-2

YelYel

886677

-- ++ --

PblaPbla

mA-1mA-1

CN1CN1

RedRed

ShieldShield

NoNo

1111

RS485RS485

DOTX441DOTX441

CABLECABLE

INTERCONNECTION

CABLE

BlackBlack

Green.Green.

YellowYellow

CABLECABLE

RedRed

ShieldShield

221133

EQUIPMENTEQUIPMENT

CN1CN1

Page 11

Equipment Operation

Important Information

1 - Never forget that if the instrument is turned off, it is necessary to wait for the cell polarization (aprox. 12 min.).

2 - While at , is possible to obtain other information, such as:

By pressing , user can obtain the Temperature value, or the Set - Points, programmed during

mode.

By pressing , it moves the equipment to STAND BY . While in STAND BY the outputs will be turned

off, that means, the current output goes to 4 mA and the contacts to NO. The outputs must be programmed by the

user.

<ESC>

3 - . This time is necessary in order to certify

that the user desires to exit the selected option.

4 - During certain program steps, it is allowed to adjust such values as: Span, salinity, barometric pressure, set-points,

hystereses and others. The adjust is done by indication of arrows (decrease) and (increase).

order to choose the correct option, increase “>” or decrease “<” then confirm by pressing Press

5 - When power failure occurs, when the equipment turns back on the initial pre-programmed conditions will remain as

prior to the power failure. Wait for the Cell Polarization. If the equipment is under , it will return to

Reading and no further action will be necessary!

While at Stand By, if a power failure occurs the instrument will not return to reading mode after the polarization is

completed, it will go to the main menu (select Function).

READ

key is only recognized when pressed and hold for about 5seconds

<SEL>

<ENT>

key again until user reaches the desired value, then press key to confirm.

mode

key

key mode

SET UP

< > Press key in

<ENT>

READ

mode

<SEL>

key.

6 -Syntonizing P + Di Contol

The Period Value (Di), must be established in relation to the retention time of the process.

Example: Retention Time is equal 30 minutes, establish a period of 1 minute.

The Proportional Band (BP), must be equally established in relation to the reagent concentration and of the process

homogenizing power. Start with 50 % of PB and increase or decrease it in relation to its variable response.

Page 12

Equipment Operation (cont.)

Set Up Procedures

The Equipment offers a non-volatil memory (E2PROM) in order to store operation’s functions (Resolution, Reading Mode, Calibration, etc) . Even when turned off from power, all functions chosen during set up will remain stored. Before you start any work with the equipment, it is recommended to verify the

conditions

Press and hold key until reached the Select Function Menu. When at the

order to access the , press key until SET UP flashes, then press

confirm the option

and follow step by step the options shown at the display. In case the user desires to switch the flashing option, press key and change as needed following the display commands, then

to confirm the option chosen. When a mistake is made and the user needs to go back to change it, press . The display will move back one screen at a time for every option. At the flow chart, the flashing option will be displayed in

, to certify that you have chosen the correct options fro your work and to avoid operation errors.

, press key in order to select the function desired, flashing option, then press In

SET UP

. A Password will be requested, press in sequence ( , , )

menu key to

Blue Color

SELECT FUNCTION

<ENTER>

SET UP

<ENTER>

<ENTER>

Check Operation

key

The option Sensor is very useful, as it allows the user to verify the cell condition. This option is self explanatory, just press key until Check flashes, then press . Then follow the display instructions as it sel explanatory.

CHECK

<SELECT> <ENTER> key to confirm the option

Read Operation

At this operation user will have options to or . In case the desire is to the Cell, press

<SELECT> option flashes key to confirm it

program will guide the user step by step on how to proceed with a perfect calibration. In case the desire is to ,

press place the cell at the sample and press

show the following format

key in until , then press . From this point on the

CALIBRATE

key at flashing option Read then , the display will then

CALIBRATE READ CALIBRATE

<ENTER>

READ

»»» »»»» »»»

-> »»»»»»» @ »»»»

1 - The "Prompt" is a signal that will flash at every executed reading or depending on the Time between Readings, chosen during Set Up Mode. 2 - The measured value 3 - Reference Temperature 4 - Sample Temperature 5 - Set - Points S1 & S2 conditions

Note: while indicating the set-points, the sample temperature (4) will not be displayed.

Page 13

Operação do equipamento

Equipment Operation (cont.)

Basic Operations

Menus are self explanatory and of ease interaction. In order to input or alter data, menus are offered always as flashing option and in order to choose this option, press key, than press

option chosen <ESCAPE>

the program will move back one step at a time), except while at Reading Mode, when this key needs to be pressed and held for about 5 seconds in order to exit the Reading Mode. The equipment stores all configurations at a non-volatile memory. Even when turned off, the conditions will remain stored.

. key is used to change option or correct data chosen at prior screens (at every touch,

<SELECT> <ENTER> to confirm the

Turning On the equipment

1 - Power the Equipment. The display will show the following menus as described below.

Indicates the model and firmware version of the equipment

Software will perform an auto check of the memories and also of the display

Cell will be Polarized and this process should take 12 minutes to complete.

After the Polarization is completed, the instrument will perform the Reading operation and in order to exit and access the Main Menu, where user will be able to Set Up the instrument, press and hold for about 5 seconds

<ESCAPE> key.

Interpreting the Read menu. For S1, the indicates that this contact was set as On during Set Up and it is now operating. For S2, the indicates that this contact was set as On during Set Up but it is not operating now. For S3, the indicates that this Contact was set to Off during Set Up.

OMEGA

DOTX441 V1.1

AUTO CHECK

DISPLAY TEST

»»»»»»»»»»»»»»»» »»»»»»»»»»»»»»»»

WAIT IN

POLARIZATION

11min : 59 sec

IN POLARIZATION

S1:» S2:» S3:»

-> 49.98ppm

S1: S2: S3:

-> 49.98ppm

Indicates when the

Bargraph was chosen

during Set Up Mode.

================

-> 49.98ppm

DISSOLVED OXYGEN

/SET UPREAD

Go to Page 13

Page 14

Equipment Operation DO - Set Up

Before starting a new operation, make sure that the Set Up conditions are correct for the application being performed.

From Page 12

Press until flashes then press <SEL> Set Up <ENT>

A Password is required in order to access the . Press in sequence , and keys.

In order to select the desired language, press key until the desired option flashes, then press key to confirm .

User can program the instrument, such as Calibration Default, Resolution, on line Calibration and more. If chosen , the last configuration will remain in effect. Press

<SEL>

<ENT>

You can calibrate the instrument as factory default. Choose and confirm and the instrument will calibrate as factory default! This option is offered in case the user does have any other way to perform a calibration procedure.

The user will be allowed to chose the unit desired. Press until the desired option flashes then confirm by presssing .

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

Yes

<SEL>

<ENT>

SET UP

<SEL>

<ENT>

DISSOLVED OXYGEN

READ/SET UP

PASSWORD

___

LANGUAGE: /

PORT

ENGLISH/SPANISH

CONFIG INSTR.?

/ YES NO

CAL. DEFAULT?

/ YES NO

CONFIRM?

/ YES NO

UNIT:

/ mg/LPPM

Go to Page15

The Range cannot be changed. It is default from factory.

The Resolution can be chosen, by pressing key until the desired opiton flashes and confirmed by pressing

The user will be allowed to adjust the DO value read at sample. Press until flashes then confirm by presssing .

<ENT>

<SEL> MAN

<ENT>

User has the option to choose the Calibration type desired. Press key until the desired option flashes, then press key to confirm the option chosen. If air, calibrate the cell dry at 2cm from water surface, and if water, dip the cell into Saturated distilled water with Oxygen. See page 19.

Note A: Every time you see the symbols “ ” “ ”, that means that the user can adjust the displayed value up or down. To increase the value pres 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!

<ENTER>

<ESC>

<SEL>

and <

0 to 60 PPM

RESOLUTION

1 / 0.1 / 0.01

ON-LINE CAL,

/ YES NO

CALIBRATE IN:

/ WATERAIR

Go to Page 14

<ENT>

RANGE

Page 15

Equipment Operation DO - Set Up (cont.)

User has the option to choose the Zero calibration type desired. Press key until the desired option flashes, then press key to confirm the option chosen. If Zero Auto - Zero is achieved internally by the instrument. If Zero Manual - also known as Zero Chemical, use solution without Oxygen presence.

Span is the second calibration point and user has the option to choose between Span Manual - when user has a solution with a known dissolved oxygen value, obtained thru Winkler Method, so read values can be compared to the Winkler values or Span Auto automatic conditions, with atmospheric air. Press

<ENTER>

press key to confirm the option chosen. The Span Resolution will depend upon the Resolution chosen for Reading. Refer to page 13 (Note A) for instructions on how to adjust this value.

User can adjust the Salinity value, so the salinity compensation can be performed. So the salt concentration of the sample, needs to be known. Remember that at fresh water this value does not exceed 2000µOhms/cm, that corresponds to 1000ppmwhere use can considres the adjust to 0 (zero). Refer to page 13 (Note A) for instruction on how to adjust this value.

<ENTER>

key until the desired option flashes, then

From Page 13

ZERO

/ AUTOMANUAL

SPAN:

/ MANUAL AUTO

SPAN:

7.50 ppm <>

SALINITY 0 ppm <>

User can adjust the Barometric Pressure Altitude. Up to 4500meters. Find out the Barometric Pressure Altitude of the location where the instrument will be used and refer to page 13 (Note A)for instruction on how to adjust this value.

User can adjust the Temperature Coefficience. This is used to correct the variation imposed by the Cell Membrane. A membrane of 50 mµ has a Temperature Coefficiency of

4.10% / °C. In case thinner or thicker membranes are used, the correct value, must be used. Refer to page 13 (Note A) for instruction on how to adjust.

BAROMETRIC PRES. ALTITUDE:800m <>

TEMP; COEF.

4.10% / ºC <>

Go to Page 15

Page 16

Equipment Operation DO - Set Up (cont.)

From Page 14

User can choose between the following Reading Modes: Continuous - Read continuously after time is set Average - Reads the average after time is set Hold - user must press key to Read User can program the time between Readings. Refer to Page 13 (Note A) for instructions on how to adjust this time.

User can program the display to show information like Barr graph, Clock and more.

User can choose if desire to have Barr graph shown above the Reading screen. When Bar Graph is displayed, the information about Sensibility and Sample Temperature will not be displayed! User can now adjust the Minimum and Maximum values for the Bar Graph. Refer to Page 13 (Note A) for instructions on how to adjust this value.

User can choose to display the clock when sending data information thru RS-485.

User can adjust date and clock, if desired.

<ENTER>

READING MODE:

/CONTIN. AVER.

TIME BETWEEN

READINGS: 5s <>

DISPLAY?

/ YES NO

BARGRAPH?

/ YES NO

Min.:0ppm

Max.:60ppm

CLOCK?

/ YES NO

ADJUST CLOCK/

/ YES NO

From Page 13

Use key to change numbers and when finished, press key. If a mistake is made,

press key to move back.

<ENTER>

14/03/2007

11:20:00

Go to Page 16

Page 17

Equipment Operation DO - Set Up (cont.)

From Page 15

User has the option to configure Contacts SP 1, SP 2 and SP 3 Press key to choose the desired option then

press key to confirm.

<ENTER>

If user chooses Contact S1 as On, while at Reading Mode, a or a will be displayed after the S1, indicating that this Contact is On. If user chooses Contact S1 as Off, while at Reading Mode, a will be displayed after the S1, indicating that this Contact is Off.

User can program the SP 1 for Alarm or P+Di.

Press key to choose the desired option then

<ENTER>

press key to confirm User can adjust the value for SP 1.

Refer to Page 13 (Note A)for instruction on how to adjust this value. Resolution will depend upon the Resolution chosen while at Set Up.

User can choose the Acting desired. Press key to choose the desired option then

press key to confirm .

<ENTER>

User can adjust the value for Hystereses. Refer to Page 13 (Note A) for instruction on how to adjust this value. Resolution will depend upon the Resolution chosen while at Set Up.

User can adjust the percent for Proportional Band. Refer to Page 13 for instruction on how to adjust this value.

User can adjust the time for Period. Refer to Page 13 for instruction on how to adjust this value.

CONTACTS CONFIG?

/ YES NO

CONFIG CONTACT

SET-POINT S1:

/ OFFON

SET-POINT S1

/ P+DiAlarm

SET-POINT S1

8.00 ppm <>

ACTING:

/ REVERSEDIRECT

HYSTERESES

0.20 ppm <>

PROPORT. BAND:

100% <>

PERIOD:

2S <>

Go to Page 17

For the Burn Out configuration, user will have three options as: On - Contact is going to stay On all the time, Off - contact will stay Off all the time or Hold - contact is going to follow the last situation, before going to Hold status.

<SEL>

Press key until the desired option flashes, then press

<ENT>

If user chooses Contact S2 as On, while at Reading Mode, a or a will be displayed after the S2, indicating that this Contact is On. If user chooses Contact S1 as Off, while at Reading Mode, a will be displayed after the S1, indicating that this Contact is Off.

to confirm.

User can program the SP 2 for Alarm or P+Di.

Press key to choose the desired option then

<ENTER>

press key to confirm

BURN-OUT CONFIG.

STAND-BY: HOLD

CONFIG CONTACT

SET-POINT S2:

/ OFFON

SET-POINT S2

/P+DiAlarm

Go to Page 17

Page 18

Equipment Operation DO - Set Up (cont.)

User can adjust the value for SP 2. Refer to Page 13 (Note A) for instruction on how to adjust this value. Resolution will depend upon the Resolution chosen while at Set Up..

User can choose the Acting desired.

Press key to choose the desired option then

<ENTER>

press key to confirm

User can adjust the value for Hystereses. Refer to Page 13 for instruction on how to adjust this value. Resolution will depend upon the Resolution chosen while at Set Up.

User can adjust the percent for Proportional Band. Refer to Page 13 for instruction on how to adjust this value.

User can adjust the time for Period. Refer to Page 13 for instruction on how to adjust this value.

For the Burn Out configuration, user will have three options as: On - Contact is going to stay On all the time, Off - contact will stay Off all the time or Hold contact is going to follow the last situation, before going to Hold status. Press key until the desired option flashes, then press to confirm. <SEL> <ENT>

If user chooses Contact S3 as On, while at Reading Mode, a or a will be displayed after the S3, indicating that this Contact is On. If user chooses Contact S1 as Off, while at Reading Mode, a will be displayed after the S1, indicating that this Contact is Off. Set Point 3 is for Cleaning purpose

Only and it is strongly recommended to use this function for DO measurements.

User can program the Cleaning Interval (up to 99hours) and also the Cleaning Time (up to 99minutes). Refer to Page 13 (Note A) for instruction on how to adjust this value.

SET-POINT S2

7.00 ppm <>

ACTING

/ REVERSEDIRECT

HYSTERESES

0.20 PPM <>

PROPORT. BAND:

100% <>

PERIOD:

2s <>

BURN-OUT CONFIG.

STAND-BY: HOLD

CONFIG CONTACT:

SET-POINT S3:

/ OFFON

CLEAN INTERVAL:

24h ><

CLEAN TIME:

20s ><

From Page 15

From Page 16

User has the option to configure Current. Press key to choose the desired option then

press key to confirm.

<ENTER>

User has the option to choose using Output mA-1.

Press key to choose the desired option then

<ENTER>

press key to confirm.

User has the option to configure Output mA-1. Press key to choose the desired option then

press key to confirm.

<ENTER>

VALUE FOR 4 mA

0.00 ppm <>

VALUE FOR 20 mA

20.00 ppm <>

Go to Page 18

CURRENT CONFIG?

/ YES NO

OUTPUT CONFIG:

mA-1

OUTPUT: mA-1

/ OFFON

OUTPUT mA-1

/Trans. Control

SET-POINT mA-1

20.90 ppm <>

ACTING

/ REVERSEDIRECT

PROPORT. BAND:

10% <>

From Page 16

Go to Page 18

Page 19

Equipment Operation DO - Set Up (cont.)

From Pge 17

User will be able to adjust the Rate and Reset values. Refer to Page 13 for instruction on how to adjust these values.

For the Burn Out configuration, user will have three options as: 4mA, 2omA or Hold. Press key until the desired option flashes, then press

<SEL>

<ENT>

Connect Amp Meter to output 4-20mA mA-1 and it will be possible to adjust them, then press <ENTER> when ready.

Adjust the value as needed by pressing (to decrease) or (to increase) keys, so the outputs can be adjusted.

increase.

to confirm.

User will be able to calibrate output mA-1. Press key to choose the desired option then

press key to confirm

<ENTER>

key will decrease the value and key will

RATE: 5s RESET: 5s

BURN-OUT CONFIG.

STAND-BY: HOLD

CALIBRATE mA-1

/ YES NO

CONFIRM?

/ YES NO

PLACE AMP METER@ OUTPUT 4-20:mA-1

READY?

ADJUST: 4 mA-1

<SEL>- <ESC>+

From Page 17

User has the option to choose using Output mA-2. Press key to choose the desired option then

press key to confirm.

<ENTER>

User has the option to choose using Output mA-2. Press key to choose the desired option then

press key to confirm.

<ENTER>

User has the option to configure Output mA-2. Press key to choose the desired option then

press key to confirm.

<ENTER>

VALUE FOR 4 mA

0.00 ppm <>

VALUE FOR 20 mA

60.00 ppm <>

BURN-OUT CONFIG.

STAND-BY: HOLD

ADJUST: 20 mA-1

<SEL>- <ESC>+

OUTPUT CONFIG:

mA-2

OUTPUT: mA-2

/ OFFON

OUTPUT mA-2

/Trans. Control

SET-POINT mA-2

21.00 ppm <>

ACTING

/ REVERSEDIRECT

PROPORT. BAND:

10% <>

RATE: 5s RESET: 5s

Go to Page 19

From Page 17

Go to Page 19

User can program Set Point 2 for Direct or Reverse Acting and also adjust the Proportional Band % and also adjust the values for Rage and Reset. Refer to page 13 (Note A) for info on how to modify this value.

Page 20

Equipment Operation DO - Set Up (cont.)

From Page 18

For the Burn Out configuration, user will have three options as: 4mA, 2omA or Hold. Press key until the desired option flashes, then press

<SEL>

<ENT>

Connect Amp Meter to output 4-20mA mA-2 and it will be possible to adjust them, then press <ENTER> when ready.

Adjust the value as needed by pressing (to decrease) or (to increase) keys, so the outputs can be adjusted.

to confirm.

User will be able to calibrate output mA-2.

Press key to choose the desired option then

<ENTER>

press key to confirm

key will decrease the value and key will increase.

BURN-OUT CONFIG.

STAND-BY: HOLD

CALIBRATE mA-2

/ YES NO

CONFIRM?

/ YES NO

PLACE AMP METER@ OUTPUT 4-20:mA-2

READY?

ADJUST: 4 mA-2

<SEL>- <ESC>+

ADJUST: 20 mA-2

<SEL>- <ESC>+

User will have the option to configure digital output RS-485 for Proprietary or Modbus Protocol. Press key to choose the desired option then press key to confirm .

User can choose the protocol desired.

User can choose the Speed.

User can choose the Bits Number.

User can choose the Parity.

User will be able to define the instrument identification number within the network, up to 256 instruments. Refer to Page 13 (Note A) for instruction on how to adjust this value.

<ENTER>

CONFIG RS-485

/ YES NO

PROTOCOL:

/ PROPR. Modbus

SPEED <100 bps>

24 48 9612

BITS NUMBER

/ 7 8

PARITY:

/ ODDEVEN

Comunication-ID

Number: 1 <>

Go to Page 20

From Page 17 & 18

END

Page 21

Equipment Operation DO - Set Up (cont.)

From Page 19

If user is changing the cell of the instrument, it is necessary to adjust its temperature. If changing the cell, choose

First find out any sample temperature (any sample, like tap water), then adjust the temperature at the screen, to match the sample temperature being used. Refer to page 13 (Note A) for instruction on how to modify this value. Dip the cell into the used sample, then press

Yes and confirm.

key.<ENTER>

NEW CELL?

/ YES NO

CONFIRM?

/ YES NO

THERMOSTATIZE

CELL @ 25ºC <>

THERMOSTATIZE

CELL @ 25ºC<E>

WAIT

STABILIZING

Yes

Temp.

ok?

VERIFY SOLUTION

TEMPERATURE

VERIFY CELL

PERSISTING ERROR

CONTACT OMEGA

CUSTOMER SERVICE

(800)872-9436

<ENTER>

================

WAIT

END

Page 22

Equipment Operation DO - Calibration

Press until flashes then press key. <SEL> Read <ENT>

Press until flashes then press key. <SEL> Calibrate <ENT>

Depending on option chosen during Set Up Mode for Zero: Auto Zero or Manual Zero.

Depending on option chosen during Set Up Mode for Span: Auto Span or Manual Span.

Depending on option hosen during Set Up Mode for Calibration Type: in Air or in Water

SIMULATE 100%

HUMIDITY

Air

CAL. IN

DISSOLVED OXYGEN

Auto

WAIT

AUTO ZERO

Auto

Water

DIP CELL INTO

AIRY WATER

/READ SET UP

DO: READ /

CALIBRATE

ZERO

Manual

PLACE CELL @

ZERO CHEMICAL

WAIT ZERO

SPAN

Manual

PLACE CELL

IN: 7.50 ppm

READY?

CHEMICAL

Simulate 100% Humidity as shown on below picture. This option is show if user had chosen to calibrate in Air. Press key when ready. <ENT>

Dip Cell into sample to be measured. Make sure that the sample is being stirred. Stirring is crucial for DO measurement and without it the result will not be correct! Then press key when ready.<ENTER>

Follow this procedure in order to simulate 100% humidity.

Level

READY?

================

WAIT

GO TO SAMPLE!

READY?

Cell

Distilled Water

Airy water is water place inside a Reservoir and O2 is directly pumped inside this reservoir, mixing with the water.

Press key when ready. <ENT>

10mm

Page 23

10.

pH/Leitura

Equipment Operation DO - Read

Press until flashes then press key. <SEL> Read <ENT>

Press until flashes then press

key.

The reading will be displayed and also the Set Points conditions. If user had chosen Contacts (S1, S2 and S3) as On, a or will be displayed after the Contact Set Point number, indicating that this Contact is On. If user ha chosen Contacts (S1, S2 and S3) as Off, a will be displayed after the contact Set Point number, indicating that this Contact is Off. Set Point 3 is for Cleaning

purpose Only and it is strongly recommended to turn On this Set Point.

Press and it will be able to verify the temperature <SEL>

Press and it will be able to verify the values

<SEL>

for Current Output, chosen during Set Up Mode.

DISSOLVED OXYGEN

READ/SET UP

DO - /

READ

CALIBRATE

GO TO SAMPLE!

READY?

S1:» S2:» S3:»

-> 49.98ppm

S1:» S2:» S3:»

23.2ºC

mA-1: 4.00mA mA-2: 20.00mA

Reading display, when the

bargraph function was not

chosen durign Set Up Mode.

================

-> 49.98ppm

Press and it will be able to adjust the value Read, if

<SEL>

chosen this procedure during Set Up Mode (On Line Calibration-page 13). Refer to page 13 for instructions on how to adjust this value.

<SEL>

Press and it will be able to fine tune the Current outputs (mA-1 and mA-2, if they were chosen for Control Purpose (pages 17 & 18), based on the process situation. Confirm the opiton chosen.

At this point the user will be able to adjust the mA Output Current. Press to decrease the value or

should be adjusted until reached an ideal current output value for the value being read by the cell

<ESC> toincrease the value this value

<SEL>

ON LINE CALIBR.:

3.93ppm <>

FINE TUNE PROC,?

/ NOYES

CONFIRM?

/ YES NO

CONTROL

for mA 1?

Yes

FINE TUNE mA-1?

/ YES NO

3.93ppm mA-1

CONTROL

for mA 2?

Yes

FINE TUNE mA-2?

/ YES NO

3.93ppm mA-2

END

Page 24

CN1

CN3CN2 CN4

RS485

mA-2

mA-1

Med.

Blind.

TERMO

Ref.

F2 F1

Maintenance

Case Disassemble/Aseemble Method

This method has an objective to instruct technical personal for assemble and disassemble or the case. Necessary Material: Hex Tool ¼ “

Parts Description

ID Tag

SEL.

ENT.

ESC.

Nuts

Back Lid

Desassemble Porceedures

Command

Keys

Frontal Lid

1 - Unscrew back and front al lids.

2 - Using a Hex Tool 1/4", unscrew nuts used to attach the electronic circuit boards set to the case.

3 - Remove the electronic circuit boards, from the back lid, being careful not to damage the circuits.

Assemble Proceedures

1 - Place the electronic circuit boards set inside the case, insert if from back lid. 2 - Using the Hex Tool, re-attach the electronic circuit boards to the case, by the nuts. 3 - Thread the front and back lids to the case.

Note: If necessary to maintain the command keys, execute the following steps:

1 - Remove identification Tag; 2 - Using the Rubber device (need to request from factory), press with some pressure over the command keys and turn it counter clockwise in order to unscrew it; 3 - Remove the spring and the contact pin; 4 - Make the necessary maintenance and proceed with the assembly, following the same steps in reverse.

Rubber Device

ø 10 ø 20

* Dimensions in miliímeters

Page 25

A periodical cell maintenance consists of replacing the ELECTROLYTE, the MEMBRANE and cleaning of the Ag/AgCI/Pt ELECTRODE. The maintenance must be executed when notice sensibility lost during calibration or frequent deviations of the calibrated value. These factors could occur caused by: Silver Phosphate clogging at the Anode, impurity clogging, grease or even membrane mechanical damage. Initiate this operation by replacing the electrolyte solution, if necessary proceed with Ag/AgCI/Pt Electrodes cleaning (verify again) and if even needed, replace the membrane.

ATTENTION

Cell Maintenance

The Silver Anode is treated superficially with Silver Chloride, presenting a dark grey color and this is normal.

Electrolyte Replacement

The electrolyte consists of a Tribasic Phosphate Sodium solution (Na3 PO4 .12H2O) . In order to replace it, proceed as follow:

1. Unscrew the Cell and Tip Protection Cap from the body, as shown below.

Cell Body

Cell and Tip

Protetion Cap

2. Unscrew the Electrolyte Reservoir.

Electrolyte

Reservoir

Attachment

Ring

Cell Base

3. Wash the Electrolyte Reservoir interior and exterior using distilled or deionized water

4. Rinse it with Tribasic Phosphate Solution, provided with the unit, then remove it immediately.

5. Fill the Electrolyte Reservoir with Tribasic Phosphate Solution (DOA-21RS) up to the beginning of the internal thread. Make sure small bubbles will not be created while filling the reservoir. Shack or tap the Reservoir in order to remove these bubbles. Bubbles will interfere with the reading!

6. Reinstall the Electrolyte Reservoir into the cell being careful in order not to touch or damage the membrane.

7.Proceed with the instrument calibration.

Page 26

Cell Maintenance (cont.)

Membrane Replacement

In order to proceed with the membrane replacement, the cell is supplied with an Industrial Cell Maintenance Kit (DOA-21MK) composed of 6 Electrolyte Reservoir, already supplied with its own membrane and Electrolyte Solution (DOA-21RS).

In order to replace the membrane, just un-thread and remove the old Electrolyte Reservoir and discard it. Fill up the new Electrolyte Reservoir, up to the beginning of the thread, using the electrolyte solution (DOA-21RS) supplied with the instrument, dropping it gently into the reservoir, avoiding to generate bubbles. Bubbles will interfere with the reading and must be avoided. After replacing the membrane, look at the membrane tip and inspect it visually, if noticed any bubble presence, remove the Electrolyte Reservoir, tip it using your finger tips by tapping on it so he micro bubbles can be released from the membrane. Refill the reservoir, up to the beginning of the thread and screw it back at the cell and visually re-inspect for bubbles, again!

Electrolyte Reservoir

Membrane

Page 27

Cell Maintenance (cont.)

Cell Replacement

In order to proceed with the DO Cell (DOE-441-R) replacement, follow as below.

1. Unscrew the Cell and Tip Protection Cap (shown at figure A).

Cell and Tip

Protetion Cap

Figure A

Cell Body

2. Unscrew the attachment ring (shown at Figure B);

2.1 Pull out the cell base up to the cable extension limit and the air cleaning hose (shown at figure B);

2.2 Unscrew the cell connector from the cell, then disconnect the cleaning hose pushing the quick connect (making an “L” movement), in order to remove the cleaning hose (shown at figure C);

Attachment

Ring

Cell Base

Figure B

Quick

Connect

Cleaning

Hose

Cell

Conector

Figure C

Page 28

2.3 Move the base to a bench in order to start the membrane replacement;

2.4 Using an 27mm or 1” 1/6 tool, unscrew the H-8 connector and remove the cell (shown at figure D);

3. With the new cell on hands, proceed with the reverse operation as described above and on page 26.

Cell Maintenance (cont.)

Figure D

Page 29

Cell Maintenance (cont.)

Ag / AgCl / Pt Electrode Cleaning

The Cell electrode is composed internally by a silver anode that is superficially treated presenting a dark grey color and Pt cathode. This electrode offers a limited life and requires maintenance. But, its use in contemned solutions, cause the anode to get dirty and requires a periodical cleaning. In order to clean the cell electrode, proceed as:

1. Unscrew the Cell Protection Cap;

2. Unscrew the Electrolyte Reservoir being careful in order not to touch or damage the membrane;

3. Wash the electrode using deionized water;

4. Using a soft absorbent paper, carefully clean the anode and cathode; rinse using deionized water;

5. Refill the Electrolyte Reservoir with electrolyte (DOA-21RS) up to the beginning of the thread and screw it back to the Electrode, like described on prior pages of the Cell Maintenance.

Electrode

Anode

Cathode

Page 30

10.

1) Proprietary:

Order:

ESC ID P CR LF 0x1B 0x50 0x0D 0x0A Hexadecimal

Answer:

L > > V V V V V V mgO2/L C C C C C C m A

Example of answer for an un-stable value

L > 5 . 0 0 mgO2/L 1 2 . 0 0 m A

Example of answer for a stable value

Proprietary Communication Protocol

The ID is configured at the instrument from 1 to 32.

L > > 5 . 0 0 mgO2/L 1 2 . 0 0 m A

Note: a) When the answer comes a C instead of a L, it means that the equipment is under calibration function (is being operated in location by the user, executing the calibration operation at the instrument). b) When the answer comes an S instead of a L, it means that the equipment is under Set Up function and it is being operated in location by the user.

2) RS485 – It is a “physical location”, where the proprietary protocol will be “transported”.

As factory default, this communication comes configured as:

Speed = 9600 Parity = none Number of Bits = 8 Stop Bit = 1 ID = 1

Page 31

Page 32

M-4520/0908