YSI DO200A User Manual [en, es, fr]

Operations Manual

®

EcoSense

DO200A

Dissolved Oxygen

and Temperature

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

Field/Lab

Instrument

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WARRANTY

The EcoSense® DO200A Instrument is warranted for one year from date of
purchase by the end user against defects in materials and workmanship. DO200A
probes and cables are warranted for one year from date of purchase by the end
user against defects in material and workmanship. Within the warranty period, YSI
will repair or replace, at its sole discretion, free of charge, any product that YSI
determines to be covered by this warranty.

To exercise this warranty, write or call your local YSI representative, or contact YSI
Customer Service in Yellow Springs, Ohio. Send the product and proof of
purchase, transportation prepaid, to the Authorized Service Center selected by YSI.
Repair or replacement will be made and the product returned, transportation
prepaid. Repaired or replaced products are warranted for the balance of the
original warranty period, or at least 90 days from date of repair or replacement.

Limitation of Warranty
This Warranty does not apply to any YSI product damage or failure caused by: (i)

failure to install, operate or use the product in accordance with YSI’s written
instructions; (ii) abuse or misuse of the product; (iii) failure to maintain the product
in accordance with YSI’s written instructions or standard industry procedure; (iv)
any improper repairs to the product; (v) use by you of defective or improper
components or parts in servicing or repairing the product; or (vi) modification of
the product in any way not expressly authorized by YSI.

THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR
IMPLIED, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR
A PARTICULAR PURPOSE. YSI’s LIABILITY UNDER THIS WARRANTY IS LIMITED TO
REPAIR OR REPLACEMENT OF THE PRODUCT, AND THIS SHALL BE YOUR SOLE
AND EXCLUSIVE REMEDY FOR ANY DEFECTIVE PRODUCT COVERED BY THIS
WARRANTY. IN NO EVENT SHALL YSI BE LIABLE FOR ANY SPECIAL, INDIRECT,
INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM ANY
DEFECTIVE PRODUCT COVERED BY THIS WARRANTY.

CONTACT INFORMATION

YSI
1725 Brannum Lane
Yellow Springs OH, 45387, USA
Tel: [phone] • 937-767-7241; Fax: [phone]
E-mail : [e-mail]
Web : www.ysi.com

1

CONTENTS

WARRANTY ............................................................................................................ 1

CONTACT INFORMATION .................................................................................. 1

GENERAL INTRODUCTION ................................................................................. 3

INITIAL INSPECTION ............................................................................................ 3

PRECAUTIONS ...................................................................................................... 3

The Case ......................................................................................................... 3

The Probes (Field & Lab) ............................................................................... 3

PROBE PREPARATION ......................................................................................... 4

BATTERY INSTALLATION .................................................................................... 4

Battery Disposal ............................................................................................. 4

THE KEYPAD .......................................................................................................... 4

THE LCD DISPLAY ................................................................................................. 4

OPERATIONAL PROCEDURES ........................................................................... 5

MEASUREMENT MODES ..................................................................................... 5

SAVING, VIEWING AND DELETING DATA

.................................................... 5

CALIBRATION SET-UP .......................................................................................... 5

Requirements ................................................................................................. 5

Procedure ....................................................................................................... 5

PROBE MAINTENANCE ....................................................................................... 6

TROUBLESHOOTING ........................................................................................... 7

SPECIFICATIONS .................................................................................................. 7

CONVERSIONS ..................................................................................................... 7

RECOMMENDED SPARE PARTS LIST ................................................................ 7

2

GENERAL INTRODUCTION

The DO200A is a precise tool that measures temperature and dissolved oxygen in % and
ppm (mg/L) .

This instrument has a waterproof IP67 case when the connector cap is installed. The keys are
highly reliable with tactile and audio feedback. This instrument uses one 9V battery. Re­calibration is not required after turning the instrument off and on.

The front of the instrument has a large LCD that displays DO %, ppm, and temperature
simultaneously along with user prompts and mode indicators. The unit prompts the user
through calibration and measurement procedures.

The model DO200A field and lab probes use a polarographic electrode with convenient
screw-on cap membranes. The 200-4 and 200-10 field probes come with a built-in
temperature probe for automatic temperature compensation, as well as a stainless steel body
for added weight. The self stirring 200-BOD lab probe comes with a power supply and has
replaceable electrodes.

Other features include long battery life and high 50/60 Hz AC noise rejection. This instrument
is universal and user-friendly for field, industrial, and laboratory applications.

INITIAL INSPECTION

Carefully unpack the unit and accessories, and inspect for shipping damages. Compare
received parts with materials listed on the packing list. Notify YSI immediately of any damage
or missing parts. Save all packing materials until satisfactory operation is confirmed.

PRECAUTIONS
The Case

Though the instrument is housed in a water-proof IP67 case, DO NOT use it underwater. The
connector is not waterproof unless the cap is installed. In case of submersion without the cap
connected, follow these steps immediately:

1. Dry the connector if necessary. Rinse unit carefully with distilled water. After rinsing and

drying, inspect and clean connectors to remove all contaminants that may affect probe

connections.

2. Wait for unit and connectors to dry completely before resuming operation.

3. If the unit does not function correctly after steps 1 and 2, call YSI for possible repair or

replacement.

The Probes (Field & Lab)

1. Membranes last longer if properly installed and regularly maintained. Erratic readings

can result from damaged or fouled membranes or from large bubbles in the electrolyte

reservoir. If unstable readings or membrane damage occurs, replace both the

membrane cap and Oxygen Probe solution (O2 Probe Electrolyte). The average

membrane replacement interval is 4 to 8 weeks, although they may last longer if kept

clean. Harsh environments, such as wastewater, may require membrane replacement

every 2 to 4 weeks. Unstable readings may occur if membrane cap is coated with oxygen

consuming or producing organisms such as bacteria or algae.

2. Chlorine, sulfur dioxide, nitric oxide and nitrous oxide can affect readings by behaving

like oxygen at the probe.

3. Avoid substances that may damage probe materials such as concentrated acid, caustics

and strong solvents. Probe materials include Stainless steel, epoxy and ABS Plastic.

4. Keep the probe’s gold cathode clean and textured (when properly maintained it has a

matte finish). If it is tarnished (from contact with certain gases), or plated with silver (from

extended use with a loose or wrinkled membrane), then clean it, following the

instructions in “Probe Maintenance”.

3

5. To prevent the membrane and electrolyte from drying out, store the field probe in the

A

calibration bottle with the moistened, clean sponge and the lab probe in a clean BOD

bottle with 1 inch of water to keep them in a saturated air environment.

PROBE PREPARATION

The DO200A probe ships with a dry, protective membrane. To install a new membrane cap
on the probe:

1. Unscrew probe membrane cap and discard.

2. Fill a new cap with Oxygen Probe Solution. If using the probe solution for the first time,

prepare it according to directions on the bottle.

3. Thread filled membrane cap onto sensor.

4. Allow sufficient warm-up time for initial use (10-15 min). During this time an “ovEr”

message may appear on the display. This is normal. After the warm up is complete the

message will disappear.

BATTERY INSTALLATION

An initial display of “LOW BAT” on the LCD indicates
approximately one hour of battery life for unit operation within
specifications. Replace battery when “LOW BAT” appears on
the LCD.

To replace battery, remove the two battery cover screws and
the

battery cover and o-ring. Replace the 9V battery. Replace the
battery cover and o-ring (be sure to align the o-ring correctly to
prevent a bad seal) and fasten the two battery cover screws for

Figure 1.

Battery Installation

the water-proof feature.

Battery Disposal

This instrument is powered by a 9 volt battery, which the user must remove and dispose of
when the batteries no longer power the instrument. Disposal requirements vary by country
and region, and users are expected to understand and follow the battery disposal
requirements for their specific locale.

THE KEYPAD

1. : Turns the unit on or off.

2. MODE: In normal operation, toggles display between Dissolved Oxygen in % air

saturation, Dissolved Oxygen in ppm (mg/L), Delete and Recall. In Calibration mode,

exits current calibration and displays the next calibration parameter.

3. CAL: In normal operation, changes the mode from Normal to Calibration. See

Calibration Set-up.

 : In Calibration Set-up, press this key to save the current parameter to memory.

4.

5.  and  Keys: Increases or decreases the display value as desired.

THE LCD DISPLAY

1. BAT: Low battery indicator.

2. CAL: Calibration mode indicator.

3. SAL ppt: Displays during calibration

when user is prompted for the

approximate salinity of the sample in

parts per thousand (ppt).

4. mBar: Displays during calibration to

prompt user for barometric pressure.

5. Main display for dissolved oxygen

values.

6. %/ppm: Unit indicators.

1

2

4

BAT

CAL

Figure2. LCD Display

SAL ppt

mBar

% ppm

C

3

4

5

6

7

7. ºC: Temperature display.

OPERATIONAL PROCEDURES

Press to turn the unit on or off. The instrument will perform a self-diagnostic test, during
which an “ovEr” message may appear on the display. This is normal. After the warm up is
complete the message will disappear. After the self-diagnostic test completes, the
temperature displays in the lower right of the display, and the unit is ready for operation.
Immerse the probe into the sample solution. If possible, do not allow probe to touch any solid
object in the solution. Avoid air bubbles bursting on the membrane surface. When the unit is
not in use, turn it off to save battery life. The instrument has a 30 minute auto shut off feature
when not in use.

NOTE: During an oxygen measurement, the probe must be moved approximately 1/2 ft per
second to overcome the consumption of oxygen by the sensor. When using the 200-BOD lab
probe, however, simply use the probe’s self-stirring feature.

MEASUREMENT MODES

This unit provides three distinct measurements:

1. Temperature - Current solution temperature continually displays.

2. Dissolved Oxygen % - Measurement of oxygen in percent saturation.

3. Dissolved Oxygen ppm - Measurement of oxygen in ppm (mg/L).

Carefully observe the units displayed at the far side of the LCD to determine the desired
mode.

SAVING, VIEWING AND DELETING DATA

The DO200A can save 50 data records. When in measurement mode, press  to save a
record. The instrument will confirm the saved data by displaying SAVE and the record
number for one second. “Full” is displayed when trying to save data and the memory is full.

To view saved data, press mode until RECALL is displayed and then press . Use the Up or
Down arrow keys to review different saved records. Press Mode to escape back to
measurement mode.

To delete data records, press Mode while in measurement mode until DELETE is displayed.
Press  . “All” will be displayed and blinking. Press the Up or Down arrow key to switch
between delete ‘All’ or ‘Each’ options. Select either ‘All’ or ‘Each’ by pressing  while that
option is displayed.

If ‘All’ is selected, all records will be deleted from memory and ‘None’ will be displayed. Press
Mode twice to return to the measurement mode.

If ‘Each’ is selected, the Up and Down arrow keys will allow you to scroll through the saved
data records. Press  to delete the selected record. All records after the deleted record will
shift up to keep the records in sequential order. For example, if record 3 is deleted, record 4
will become record 3 and record 5 will become record 4. Press Mode twice to return to the
measurement mode.

CALIBRATION SET-UP
Requirements

1. The approximate pressure (in millibars [mBar]) of the location at the time of calibration.

2. The approximate salinity of the water to be analyzed. Fresh water has an approximate

salinity of zero parts per thousand (ppt). Seawater has an approximate salinity of 35 ppt.

Procedure

1. For the field probe, place 5-6 drops of clean water (tap, distilled, or deionized) into the

sponge inside the calibration bottle. Turn the bottle over and allow any excess water to

drain out of the bottle. The wet sponge creates a 100% water-saturated air environment

5

for the probe, which is ideal for calibration, transport, and storage of the Model DO200A

probe. For calibration, the probe remains in a water saturated air atmosphere and is not

submersed.

For the lab probe, simply use the same bottle the probe is stored in with approximately

1 inch of water in the bottom. This creates a 100% water-saturated air environment for

the probe, which is ideal for calibration and storage of the Model 200-BOD probe. For

calibration, the probe remains in a water saturated air atmosphere and is not

submersed.

2. For the field probe, slide it into the calibration bottle. Be sure the membrane does not

touch the sponge.

3. Turn on the DO200A by pressing . Wait 10 to 15 minutes for the dissolved oxygen and

temperature readings to stabilize.

4. Press CAL.

5. The LCD prompts for the local pressure in mBar. Use the  and  keys to increase or

decrease the pressure value respectively. See the section titled ‘Conversions’ to convert

barometric pressure units to mBars.

6. When the proper pressure displays, press

lower right of the display. Once the value in the main display stabilizes, press

move to the salinity compensation procedure.

7. The display prompts for the approximate salinity of the water to be analyzed. Use the 

and  keys to increase or decrease the salinity compensation value to the value of your

sample (between 0 to 40 parts per thousand [ppt]). When the correct salinity displays,

 .

press

8. The unit holds calibration even if it is powered off. However, it is recommended to check

calibration with each use and recalibrate as necessary to prevent drift. Dissolved oxygen

readings are only as good as the calibration.

 once to view the calibration value in the

 again to

PROBE MAINTENANCE

Clean the probe whenever it won’t calibrate or the readings are unstable and changing the
membrane does not solve either issue. On average, the probe should only be cleaned about
once or twice per year. To clean the probe, sand the electrodes according the directions
below. In addition to sanding, a chemical soak may be necessary (direction below). Always
sand the electrodes after performing a chemical soak.

1. Turn unit off, or disconnect probe.

2. Remove membrane cap and rinse the probe with clean water (tap, distilled, or

deionized).

3. Obtain either:

 14 % lab strength ammonium hydroxide and soak for 2-3 minutes

4. Rinse ammonium hydroxide/ammonia completely from probe.

5. Use sandpaper (400 grit wet/dry, supplied with 5238 kit and with the 5908 membrane

6. Install a new membrane cap.

Never use chemicals or abrasives not recommended by YSI.

 3% household cleaning strength ammonia and soak overnight (8-12 hours)

kit) to buff (wet sand) excess deposits from probe. Perform a circular sand on the gold

cathode (tip) and also wrap the sand paper around the silver anode (shaft) and twist.

Rinse with clean water (tap, distilled, or deionized).

6

TROUBLESHOOTING

Y

Y

Main Display reads: Possible Solutions:

“ovEr” or “undr”

 Check membrane and electrolyte solution.
 Clean anode and cathode.
 Return product for service.

Secondary Display reads: Possible Solutions:

“undr”

“ovEr”

 Heat the sample to above –6.0 °C
 Return product for service.

 Cool sample to below 46.0 °C
 Return product for service

SPECIFICATIONS

Display Range Accuracy Resolution

Dissolved O2

(ppm or mg/L)

Dissolved O2

% air-sat

Temperature °C -6.0 to 46.0 °C

Pressure Compensation 600 to 1100 mBar (450 to 825 mmHg)
Salinity Compensation From 0.0 to 40.0 ppt
ATC Probe
Calibration Backup
Audio Feedback
Power Source One 9V battery
Operating Temperature
Instrument Casing Waterproof IP 67
Weight (with battery) 270 grams (.61 lbs)
Dimensions (L x W x D) 18.7 cm x 7.6 cm x 3.8 cm (7.3 in x 3 in x 1.5 in)

0 to 20.00 ppm (mg/L) ±2 % of the reading or ±2% air

0 to 200.0 % ±2% of the reading or ±0.2 ppm,

21 to 115 °F

saturation, whichever is greater

whichever is greater.

±0.3 °C ±1 digit 0.1 °C

Thermistor, 10K, at 25C

es
es, on all keys

0 to 50C (32 to

122 °F)

0.01 mg/L

0.1 %

CONVERSIONS

To Convert: Multiply by:
Inches of Hg to mBar 33.864
Inches of Hg to mmHg 25.4
mmHg to mBar 1.333

RECOMMENDED SPARE PARTS LIST

PART # DESCRIPTION

200-4 4 meter (approx. 13 feet) probe and cable assembly

200-10 10 meter (approx. 33 feet) probe and cable assembly

200-BOD Self-stirring BOD lab probe and cable assembly with power supply

485 DO carrying case, soft sided

606036 DO carrying case, hard sided

5908 Membrane kit, 1.25 mil PE (605306), six cap membranes and KCl solution

Item #606035REF

Revision A; July 2012

For the latest version of this manual, visit www.ysi.com

7

GARANTIE

L’appareil EcoSense® DO200A est garanti pour une période d’un an, à compter de la date
d’achat par l’utilisateur final, contre tout défaut matériel et de fabrication. Les sondes et les
câbles de DO200A sont garantis pour une période d’un an, à compter de la date d’achat par
l’utilisateur final, contre tout défaut matériel et de fabrication. Pendant la période de garantie,
YSI s’engage à réparer ou à remplacer, gratuitement et à sa discrétion, tout produit qu’YSI
peut établir comme étant couvert par la garantie.

Pour faire valoir cette garantie, écrivez ou appelez votre représentant YSI ou contactez le
Service clientèle d’YSI à Yellow Springs, Ohio, États-Unis. Envoyez le produit et son justificatif
d’achat en port payé au Centre de service homologué sélectionné par YSI. La réparation ou le
remplacement seront effectués et le produit vous sera retourné en port payé. Les produits
réparés ou remplacés sont garantis jusqu’à expiration de la période de garantie originale ou
au moins 90 jours à compter de la date de réparation ou de remplacement.

Limitation de garantie
Cette garantie ne s’applique pas aux produits YSI endommagés ou présentant des

dysfonctionnements pour les raisons suivantes : (i) installation, exploitation ou utilisation du
produit d’une façon non conforme aux instructions écrites d’YSI ; (ii) abus ou mésusage du
produit ; (iii) manquement à l’entretien du produit conformément aux instructions écrites
d’YSI ou aux procédures industrielles normales ; (iv) réparation non conforme du produit ; (v)
utilisation par vous de pièces ou de composants défectueux ou non conformes lors de
l’entretien ou de la réparation du produit ; ou, (vi) modification du produit d’une façon non
expressément autorisée par YSI.

CETTE GARANTIE REMPLACE TOUTES LES AUTRES GARANTIES, EXPRESSES OU INDUITES,
Y COMPRIS LES GARANTIES DE COMMERCIABILITÉ OU D’ADAPTATION À UN USAGE
PARTICULIER. LA RESPONSABILITÉ D’YSI SELON LES TERMES DE CETTE GARANTIE SE
LIMITE À LA RÉPARATION OU AU REMPLACEMENT DU PRODUIT, CONSTITUANT VOTRE
SEUL ET UNIQUE RECOURS POUR TOUT PRODUIT DÉFECTUEUX COUVERT PAR CETTE
GARANTIE. YSI NE POURRA EN AUCUN CAS ÊTRE TENU RESPONSABLE DE DOMMAGES
SPÉCIAUX, INDIRECTS, ACCIDENTELS OU CONSÉCUTIFS RÉSULTANT DE L’UTILISATION DE
TOUT PRODUIT DÉFECTUEUX COUVERT PAR CETTE GARANTIE.

COMMENT NOUS CONTACTER

YSI
1725 Brannum Lane
Yellow Springs OH, 45387, États-Unis
800-897-4151 • 937-767-7241 • Télécopie : 937-767-1058
E-mail : [e-mail]
Web : www.ysi.com

1

TABLE DES MATIÈRES

GARANTIE .............................................................................................................. 1

TABLE DES MATIÈRES ......................................................................................... 2

INFORMATIONS GÉNÉRALES ............................................................................ 3

INSPECTION INITIALE .......................................................................................... 3

PRÉCAUTIONS ...................................................................................................... 3

PRÉPARATION DE LA SONDE ............................................................................ 4

INSTALLATION DE LA PILE ................................................................................. 4

CLAVIER ................................................................................................................. 4

ÉCRAN À CRISTAUX LIQUIDES .......................................................................... 5

PROCÉDURES D’UTILISATION ........................................................................... 5

MODES DE MESURE ............................................................................................ 5

ENREGISTREMENT, AFFICHAGE ET SUPPRESSION DES DONNÉES ........... 5

CONFIGURATION DE L’ÉTALONNAGE ............................................................ 6

ENTRETIEN DE LA SONDE .................................................................................. 7

DÉPANNAGE ......................................................................................................... 7

SPÉCIFICATIONS .................................................................................................. 8

CONVERSIONS ..................................................................................................... 8

LISTE DES PIÈCES DÉTACHÉES RECOMMANDÉES ........................................ 8

2

INFORMATIONS GÉNÉRALES

L’ DO200A est un outil de précision mesurant l’oxygène dissous en pourcentage, ppm (mg/l)
ainsi que sa température. Un microprocesseur incorporé stocke, calcule et compense tous les
paramètres relatifs aux déterminations liées à l’oxygène dissous, y compris les
caractéristiques de température des électrodes de détection de l’oxygène dissous.

Cet appareil est étanche (IP67) uniquement lorsque le capuchon recouvre le connecteur est
branché. Les touches mécaniques sont très fiables et fournissent une réaction tactile et
sonore. Cet appareil utilise une pile de 9 V. Aucun réétalonnage n'est nécessaire lorsque
l'alimentation électrique est rétablie

L’avant de l’appareil dispose d’un écran à cristaux liquides affichant simultanément le
pourcentage, les mg/l et la température de l’oxygène dissous, ainsi que les invites destinées à
l’utilisateur et les indicateurs de mode. L’appareil émet des invites destinées à l’utilisateur lors
des procédures d’étalonnage et de mesure.

Le modèle de sonde de terrain et de laboratoire DO200A utilise une électrode
polarographique disposant de capuchons à membrane vissables. Les sondes de terrain 200-4
et 200-10 sont équipées d’une sonde de température incorporée permettant la
compensation automatique de la température, ainsi que d’un corps en acier inoxydable qui
en augmente la masse. La sonde de laboratoire 200-BOD est équipée d’un bloc
d’alimentation électrique et comporte des électrodes remplaçables auto-agitées.

Parmi les autres caractéristiques, on notera la longue durée de vie des piles et une
élimination du bruit élevée de 50/60 Hz c.a. Cet appareil est convivial et particulièrement
souple dans les applications sur le terrain, industrielles et en laboratoire.

INSPECTION INITIALE

Déballez soigneusement l’appareil et les accessoires et vérifiez qu’ils n’ont pas été
endommagés lors de l’expédition. Comparez les pièces reçues aux matériaux répertoriés
dans le bordereau d’emballage. Notifiez immédiatement YSI s’il s’avère que des pièces sont
endommagées ou manquantes. Mettez de côté les matériaux d’emballage jusqu’à ce que le
fonctionnement correct de l’appareil soit confirmé.

PRÉCAUTIONS
Boîtier

L'appareil est en effet protégé par un boîtier étanche IP67, mais NE doit PAS être utilisé sous
l'eau. Le connecteur n’est pas étanche, sauf si le capuchon le recouvre. En cas d’immersion
sans capuchon, suivre immédiatement les étapes suivantes:

1. Séchez le connecteur, le cas échéant, et remplacez la sonde d’oxygène dissous. Rincez

soigneusement l’appareil avec de l’eau distillée. Après le rinçage et le séchage,

inspectez et nettoyez les connecteurs en vue d’éliminer tout contaminant pouvant

affecter les connexions de la sonde.

2. Attendez que l’appareil et la sonde soient parfaitement secs avant de reprendre les

opérations.

3. Si l’appareil ne fonctionne pas correctement après les étapes 1 et 2, appelez YSI en vue

d’une réparation ou d’un remplacement éventuels.

Les sondes (de terrain et de laboratoire)

1. Les membranes durent plus longtemps si elles sont correctement installées et

entretenues régulièrement. Des membranes endommagées ou sales et des grosses

bulles dans le réservoir d’électrolyte peuvent entraîner des lectures incohérentes. Si les

lectures sont instables ou la membrane endommagée, remplacez le capuchon à

membrane et la solution de la sonde à oxygène (également appelée « Électrolyte de

sondage d’oxygènométrie », chlorure de potassium ou solution KCl). Les intervalles de

remplacement sont habituellement de 4 à 8 semaines, bien qu’ils puissent se prolonger

s’ils sont conservés en bon état de propreté. Les milieux particulièrement difficiles, tels

que les eaux usées, peuvent exiger que la membrane soit remplacée toutes les 2 à 4

semaines. Des lectures instables peuvent avoir lieu si le capuchon à membrane est

3