Oakton T-100 Data Sheet

Oakton

T-100 Waterproof Turbidimeter Operation Instructions

T-100 Turbidimeter

Getting Started

This instrument operates on the nephelometric principle of turbidity
measurement and is designed to meet the criteria specifi ed in ISO
7027 and DIN 27027 standards.

Using a Phillips screwdriver, remove the screws from the battery cover
and install (4) AAA batteries (included). Tighten the screws to retain a
waterproof seal when completed.

Sample Vial

Sample Well

Index Mark

Liquid Crystal Display

Keypad

Light Shield Cover

- for covering the vial

Keypad Functions

Powers on and shuts off the meter.
The meter automatically shuts off 20 minutes
after last key press.

Initiates the calibration mode.
Press during calibration mode to abort the
calibration and enter Standby “

” mode.

When in measurement mode, the READ/ENTER key
is used to perform a measurement.
Single Measurements: When the key is pressed
and released immediately (less than 0.3 seconds),
the display will blink “

” for 10 times and then

display the measured value.
Continuous Measurements: If the READ/ENTER
key is pressed and held, the instrument will perform
a continuous measurement during which the display
is updated every 2 seconds. This can be used for
indexing vials. (This function is not available in
calibration mode).
After the READ/ENTER key is released,
the instrument will automatically perform a
single measurement.

During calibration mode, these keys are used
to select the calibration point in an incremental/
decremental manner. Note: This meter uses an
auto incrementing feature, i.e. after the successful
calibration of one point it automatically selects the
next calibration point, or automatically exits the
calibration mode after the fourth calibration point.
See also “Restoring Factory Calibration”.

Turbidity Calibration

The T-100 was calibrated and tested prior to leaving the factory. The
T-100 kit includes (4) primary standards (0.02, 20.0, 100
and 800 NTU) to verify the meter calibration or to recalibrate
the meter as needed. Before measuring samples for the fi rst
time, perform a meter calibration with the primary standards.
Four standard vials are included and labeled for each standard
level. 800 NTU (CAL 1), 100 NTU (CAL 2), 20.0 NTU (CAL 3),

0.02 NTU (CAL 4).

Place the light shield cover over the vial to keep stray light from
changing the calibration and sample measurement readings. In many
environments, the light shield is not required as the vial cap is able to
keep stray light from entering the sample well.

Indexing is not required due to the high quality of the glass vials.
Simply align the index mark (arrow) on the vial with the index mark
(arrow) on the meter.

Note: Do not shake the calibration standards as air entrapment
will introduce error. Do not allow the calibration standards to freeze
as this will cause permanent damage to the standards, making
them inaccurate.

Calibration Procedure

Preparing the Calibration Standard Vials

Ensure there are no scratches or marks on the glass vial. If there are
marks that could affect the turbidity measurement, select another vial.
Before using the standards for the fi rst time, rinse the inside of the
vial with a small amount of the same NTU standard that will be used
to fi ll that vial.

1. Gently pour about 5 mL from the 60 mL stock standard into the vial.

2. Cap and swirl the vial so the inside of the vial is fully rinsed with
the standard.

3. Pour the standard out of the vial and discard it.

4. Repeat steps 1 through 3.

5. Gently fi ll the vial using the 60 mL stock standard above the fi ll line
on the vial and cap the vial.

6. Repeat this rinse and fi lling procedure for the other three vials.
Note: The vial rinsing is critical for precision with the lower

NTU standards.

Use these calibration standard vials daily as a check, and
also periodically for calibration as needed. When the standard
reading of 20.0, 100, or 800 NTU drifts more than 10 % of the
standard’s NTU value, the solution should be replaced with another
aliquot from the plastic bottle following the steps listed above.
Note: 0.02 NTU standard read back value should be <0.1 NTU.

Calibration Sequence

Place the CAL 1

standard into the sample

well and press “CAL”

CAL 1

800 NTU

Blinks

Press ENTER to accept

Blinks Blinks

Place the CAL 2

CAL 2

standard into the

100 NTU

sample well

Press ENTER to accept

Blinks

Ready To Measure

Blinks

Press ENTER to accept

Place the CAL 4

CAL 4

standard into the

0.02 NTU

sample well

Press ENTER to accept

Place the CAL 3

CAL 3

standard into the

20.0 NTU

sample well

Restoring Factory Calibration

1. With the meter off, press and hold s key.

2. Power on the meter using ON/OFF. Release s key when “

(User-Reset) appears in the display.

3. The display shows “
“

”.

4. Use s or t key to choose “

” for about 2 seconds and then shows

” or “ ”.

= To restore meter back to factory calibration values

= To retain last calibrated values

5. Press READ/ENTER key to confi rm. When “
meter performs a reset, and will blink “

” is selected, the

” to indicate that it is

reading in measurement mode.

Turbidity Measurement

Insert vial containing
sample or calibration
standards before
powering on.
Alternatively, from
“

” mode,

press READ/ENTER.

Calibration Standards Battery Indicator

Vial is currently
Reading in
measurement mode

Reading in (Nephelometric
Turbidity Units (NTU) is
displayed. “
message will occur if a
vial is not present.

” error

“X.X” is
software
revision
number

Turbidity Measurement

Good techniques are important for accurate turbidity measurements.
For best results, use clean sample vials, properly position the vial in
the sample well, cover the vial with the light shield cover, use proper
handling of standards, use supplied cloth to keep vials clean and
scratch free, and perform meter calibration as needed.

Preparation of Sample Vial

1. Obtain a clean, dry sample vial.

2. Handle the sample vial only by the cap to avoid fi ngerprints on
the glass.

3. Rinse the vial with approximately 10 mL of the sample, capping
the vial with the black screw cap and gently inverting it several
times. Discard the used sample and repeat.

4. Fill the rinsed vial with the sample up to the mark indicated in the
vial. Cap the vial with the supplied black screw cap.

5. Wipe the vial with the soft, lint-free cloth supplied. Ensure that the
outside of the vial is dry, clean and free from smudges.

6. Apply a thin fi lm of silicone oil (supplied) on the sample vial (see
image below).

7. Wipe with a soft cloth to obtain an even distribution over the entire vial’s
surface. The purpose of oiling the vial is to fi ll small scratches and
to mask the imperfection in the glass. Do not apply large quantity
of oil as this may collect dirt and dust.

8. The sample vial is now ready to be inserted into the sample well
for measurement.

Applying a thin
fi lm of silicon to
the sample vial

Fill line

”

Oakton

T-100 Waterproof Turbidimeter Operation Instructions

Measurement Procedure

1. Turn meter off, and place on a fl at, level surface.

2. Place the sample vial inside the sample well and align the vial’s
index mark with the meter’s index mark.

Align index mark
on the vial with
the index mark on
the turbidimeter

3. Push the vial down until it is seated.

4. Place the light shield cover over the vial that is inserted into the
sample well.

5. Turn on the meter by pressing the ON/OFF key. After the power-up
sequence, the meter goes to measurement mode and the display
blinks “

* When meter is in “

”. The measured reading appears in the display.

” mode after calibration it is ready for

measurement. Press the READ/ENTER key. The display blinks
“

” until the measured reading appears.

Notes:

• NEVER pour liquid directly into the sample well of the instrument.

Always use a vial. The instrument will only accurately measure the
turbidity of a sample when vials sealed with the black caps are
used. The black cap serves as both seal and a primary light shield.

• NEVER attempt to clean the sample well. The optics may

be damaged.

• For battery conservation, the instrument automatically powers off

20 minutes after the last key pressed.

Measurement Sequence

Place sample

vial into the

sample well

Sample

Unknown

NTU

Power on meter or from
Standby mode, press and
release READ/ENTER

“

” blinks until stable,

then displays measured value

Troubleshooting Guide

The T-100 turbidimeter routinely performs self-diagnostics, and
will automatically generate messages to provide you with specifi c
diagnostic information.

Message Description Corrective Actions

Calibration Error. The meter is
unable to recognize the 800
NTU Calibration Standard.

Calibration Error. The meter is
unable to recognize the 100
NTU Calibration Standard.

Calibration Error. The meter is
unable to recognize the 20.0
NTU Calibration Standard.

Calibration Error. The meter is
unable to recognize the 0.02
NTU Calibration Standard.

Check or replace the
800 NTU calibration
standard.

Check or replace the
100 NTU calibration
standard.

Check or replace the

20.0 NTU calibration
standard.

Check or replace the

0.02 NTU calibration
standard.

General Calibration Error.
There is not suffi cient signal
to achieve the appropriate

Perform recalibration
with all (4) standards.

resolution.

Ensure the vial is

Excessive stray light detected.

properly seated in the
sample well. Use light

shield cover.
Lamp Failure. Return unit.
“Over Range”; value is above

maximum measurement range.
Low battery indication. The

batteries need to be replaced.

Dilute sample.

Replace batteries.

Routine Maintenance and Care

The supplied carrying case is optimal for protecting the instrument.
If you do not plan on leaving the instrument in the supplied carrying
case, when not in use, ensure that the instrument has been turned off
and that a clean sample vial fi tted with a black cap has been placed in
the sample well. This will ensure that a minimal amount of dust and/or
debris will be able to settle on the optics of the instrument.

Proper measurement of the turbidity of a sample requires the use
of a vial that is free of marks, smudges, scratches and bacterial
growth. Sample vials must be handled with absolute care to
avoid contamination or damage, which might change the optical
characteristics of the glass. Scratches, fi ngerprints, and water droplets
on the sample vial or inside the sample well can cause stray light
interference leading to inaccurate readings.

Cleaning the vial is accomplished by washing the interior and exterior
of the vial in a detergent solution. Once cleaned, the vial should be
rinsed thoroughly 8 to 10 times with clean distilled water to eliminate
the possibility of detergent buildup and streaking.

Vials can also be acid washed periodically and coated with a special
silicone oil to fi ll small scratches and mask the imperfections in the
glass. Since the silicone oil required for this application should have
the same refractive characteristics as glass, it is recommended
that the oil be obtained from us. Care should be taken not to apply
excessive oil that could attract dirt or contaminate the sample well
of the meter. Once the oil has been applied to the vial, the excess
oil should be removed with a lint-free cloth. The result should be a
sample vial surface with a dry appearance, but with all imperfections
fi lled with oil.

Sample vials should always be handled from the top or by the cap
to avoid fi ngerprints or smudges. After a vial has been fi lled with
a sample and capped, the outside surface should be wiped with a
clean, lint-free absorbent cloth until it is dry. Cleaned and dried vials
should be stored with the black caps on. The vials can be stored in the
carrying case. During normal operation you may use any typical glass
cleaner along with a lint free cloth or tissue (Kimwipes

®

), to clean the

outside of the vials.
Condensation may appear on the vial when your sample is very cold

and the relative air humidity is high. When this happens, the turbidity
that you read may be higher than the actual turbidity due to the light
scattered by the condensate on the vial. To alleviate this problem,
coat the vial with an anti-fogging agent, or by running warm water
over the vial for a short period of time to warm the sample prior
to measurement.

Intended Use, Maintenance & Precautions

This instrument is designed for turbidity measurement of water-based
solutions. For routine maintenance dust or wipe the display using a damp
cloth. If necessary, warm water or a mild water based detergent can be
used. Immediately remove any spilled substance from contact with the
meter using the proper cleaning procedure for the type of spill.

• Do not use this equipment in potentially explosive atmospheres.

• Ensure that no liquid enters the instrument.

• Do not use any aggressive cleaning chemicals (solvents or similar
agents).

• There are no user serviceable parts inside. Attempts to service internal
parts may void the warranty.

• Not intended for medical applications or patient use.

• WARNING: No modifi cation of this equipment is allowed.

Instrument Operating Conditions
Operating Ambient Temp. 0 to 50 ºC
Operating Relative

Humidity

0 to 90 %, non-condensing
at 30 ºC

Storage Temp. -20 to +60 ºC (instrument only)

Storage Relative Humidity

0 to 90 %, non-condensing
at 30 ºC

Pollution Degree 2
Overvoltage Category II
Weight 200 g
Size (L x W x H) 15.5 x 6.8 x 4.6 cm
Battery Requirement 4 x AAA (LR03) 1.5 V batteries
Vibration Shipping/handling per ISTA #1A
Shock Drop test in packaging per ISTA #1A

Certifi cations/Compliance

FCC part 15 class A, TUV 3 in 1,
CE, RoHS

Ordering Information

Waterproof T-100 handheld turbidimeter

35635-00

with set of 4 calibration standards (800, 100,

20.0 & 0.02 NTU), sample vials, lint-free cloth,
silicone oil, batteries, and hard carrying case

Waterproof T-100 handheld turbidimeter,

35635-05

sample vials, lint-free cloth, silicone oil,
batteries, and hard carrying case

35635-52

Calibration kit set – standard solutions (0.02,

20.0, 100, 800 NTU) 60 mL each and (4) vials

35653-55 Pack of 3 sample vials
00159II Silicone oil (10 mL)
00131SH /

32X366401

Replacement light shield cover

67X357201 Replacement cloth
09376-00 AAA batteries 12/pack

Oakton Instruments

625 East Bunker Court, Vernon Hills, IL, 60061, USA
Tel: [phone] • Fax: [phone]
[e-mail] • www.4oakton.com

68X357701 08/15 Rev10

Oakton

Instrucciones de funcionamiento del turbidímetro a prueba de agua T-100

Turbidímetro T-100

Primeros pasos

Este instrumento funciona de acuerdo con el principio nefelométrico
de medición de turbidez y su diseño cumple los criterios especifi cados
por las normas ISO7027 y DIN27027.

Con ayuda de un destornillador de estrella, extraiga los tornillos de la
tapa de las pilas e introduzca las (4) pilas AAA (incluidas). Apriete los
tornillos para mantener el sellado impermeable.

Vial para muestras

Puerto para muestras

Marca indicadora

Pantalla de
cristal líquido

Teclado

Cubierta protectora

de luz

(para cubrir el vial)

Funciones del teclado

Enciende y apaga el medidor. El medidor se apaga
automáticamente 20minutos después de que se
presiona una tecla por última vez.

Inicia el modo de calibración.
Presione durante el modo de calibración para anular
la calibración y pasar al modo en espera “

”.

Cuando se presiona en el modo de medición, la tecla

READ/ENTER se usa para llevar a cabo una medición.
Mediciones individuales: Cuando se presiona

la tecla y sesuelta inmediatamente (en menos
de 0,3segundos), lapantalla parpadeará con el
mensaje “

” 10veces ydespués mostrará el

valor medido.
Mediciones continuas: Si se presiona y mantiene
pulsada la tecla READ/ENTER, el instrumento llevará
a cabo una medición continua durante la cual la
pantalla se actualizará cada 2segundos. Esto se
puede utilizar para indexar archivos. (Esta función
no está disponible en el modo de calibración).
Una vez que se suelta la tecla READ/ENTER, el
instrumento realizará una medición automáticamente.

Durante el modo de calibración, estas teclas se usan
para seleccionar el punto de calibración en un orden
ascendente o descendente. Nota: Este medidor
usa una característica de aumento automático;
es decir, después de calibrar con total éxito un
punto, selecciona automáticamente el siguiente
punto de calibración o sale de manera automática
del modo de calibración después del cuarto punto
de calibración. Vea también «Restauración a la
calibración de fábrica».

Calibración de la turbidez

El T-100 ha sido calibrado y probado antes de salir de fábrica. El kit
del T-100 incluye (4) patrones primarios (0,02; 20,0; 100 y 800 NTU)
para comprobar la calibración del medidor o para recalibrarlo cuando
fuera necesario. Antes de medir muestras por primera vez, realice una
calibración del medidor con los patrones primarios. Se incluyen cuatro
viales con patrones etiquetados según el nivel del estándar. 800 UNT
(CAL 1), 100 UNT (CAL 2), 20,0 UNT (CAL 3), 0,02 UNT (CAL 4).

Coloque el protector de luz sobre el vial para evitar que la luz dispersa
modifi que la lectura de la medición de la muestra o el calibrador.
En muchos ambientes, no es necesario el protector de luz, ya que el propio
tapón del vial impide que la luz dispersa entre en el puerto para muestras.

La indexación no es necesaria debido a la alta calidad de los viales de
vidrio. Simplemente alinee la marca indicadora (fl echa) del vial con la
marca indicadora (fl echa) del medidor.

Nota: No agite los patrones de calibración, ya que el aire atrapado puede
provocar errores. No deje que se congelen los patrones de calibración,
puesto que esto haría que perdieran su exactitud y quedarían invalidados.

Procedimiento de calibración

Preparación de los viales con patrones de calibración

Asegúrese de que el vidrio del vial no tenga ninguna marca o rayón. Si
hubiera alguna marca que pudiera afectar a la medición de la turbidez,
use otro vial. Antes de usar los patrones por primera vez, enjuague el
interior del vial con una pequeña cantidad del mismo patrón UNT que
se usará para rellenar el vial.

1. Vierta cuidadosamente en el vial unos 5ml de la solución patrón de 60ml.

2. Tape y gire el vial de manera que el interior se enjuague
completamente con el patrón.

3. Vacíe el patrón del vial y deséchelo.

4. Repita los pasosdel 1 al 3.

5. Rellene con cuidado el vial usando la solución patrón de 60ml por
encima de la línea de rellenado marcada en el vial y tápelo.

6. Repita este procedimiento de enjuague y rellenado para los otros
tres viales.

Nota: El enjuagado de los viales es crucial para la precisión con los

patrones UNT más bajos.

Use estos viales como patrón de calibración diaria o como
comprobación y, asimismo, úselos regularmente cuando necesite
realizar una calibración. Cuando la lectura del patrón de 20,0, 100 u
800 UNT difi era más de un 10% del valor de UNT marcado, se deberá
cambiar la solución por otra alícuota del frasco de plástico siguiendo
los pasos descritos anteriormente.

Nota: El valor límite del patrón de 0,02 UNT debe ser <0,1UNT.

Secuencia de calibración

Coloque el estándar CAL 1
en el puerto para muestras

y pulse “CAL”

CAL 1

800UNT

Parpadea

Pulse ENTER
para aceptar

Parpadea Parpadea

Coloque el estándar

CAL 2

CAL 2 en el puerto

100UNT

para muestras

Pulse ENTER
para aceptar

Parpadea

Listo para medir

Parpadea

Pulse ENTER
para aceptar

Coloque el

CAL 4

estándar CAL 4

0,02UNT

en el puerto
para muestras

Pulse ENTER
para aceptar

Coloque el

CAL 3

estándar CAL 3

20,0UNT

en el puerto
para muestras

Restauración a la calibración de fábrica

1. Con el medidor apagado, mantenga presionada la tecla s.

2. Encienda el medidor con la tecla ON/OFF. Suelte la tecla s

cuando la pantalla muestre “

3. La pantalla mostrará “
continuación “

”.

4. Use las teclas s o t para elegir “

= Para restaurar los valores de calibración de fábrica del

” (Reinicio del usuario).

” durante unos 2 segundos y a

” o “ ”.

medidor.

= Para mantener los últimos valores de calibración.

5. Pulse la tecla READ/ENTER para confi rmarlo. Cuando selecciona
“

”, el medidor lleva a cabo un reinicio y parpadeará el mensaje

“

” para indicar que está leyendo en modo de medición.

Medición de la turbidez

Introduzca el vial que
contiene la muestra o los
patrones de calibración
antes de encender el
equipo. También, desde
el modo “
puede pulsar
READ/ENTER.

Patrones de calibración Indicador de las pilas

”,

El vial se encuentra
actualmente leyendo en
el modo de medición

“X.X” es el
número de
versión del
software

Se muestra la lectura en unidades
nefelométricas de turbidez (UNT).
Elmensaje de error “
aparece si no se ha colocado
ningún vial.

”

Medición de la turbidez

Es muy importante una buena técnica para obtener medidas precisas
de la turbidez. Para obtener mejores resultados, utilice viales de
muestras limpios, correctamente colocados en el puerto para
muestras, cubra el vial con la cubierta protectora de luz, manipule
adecuadamente los patrones, utilice los paños suministrados para
mantener los viales limpios y sin rayones y lleve a cabo la calibración
del medidor cuando sea necesario.

Preparación del vial para muestras

1. Disponga un vial para muestras limpio y seco.

2. Manipule el vial para muestras únicamente tomandolo por la tapa,
para evitar dejar huellas en el vidrio.

3. Enjuague el vial con aproximadamente 10ml de la muestra, tapando
el vial con la tapa negra de rosca y dele la vuelta suavemente varias
veces. Deseche la muestra usada y repita la operación.

4. Rellene el vial enjuagado con la muestra hasta la marca señalada
en el vial. Tape el vial con la tapa negra de rosca suministrado.

5. Limpie el vial con el paño suave y sin pelusa que se suministra.
Asegúrese de que el exterior del vial está seco, limpio y sin manchas.

6. Aplique una fi na capa de aceite de silicona (suministrado) sobre el
vial de la muestra (vea la imagen siguiente).

7. Use un paño fi no para distribuirlo por toda la superfi cie del vial.
El fi n del aceite en el vial es rellenar pequeños rayones y disimular
las imperfecciones del vidrio. No aplique demasiado aceite, ya que
entonces podría arrastrar partículas de polvo y suciedad.

8. Ahora el vial para muestras ya está preparado para introducirse en el
puerto para muestras para la medición.

Aplicación de una fina
película de silicona al vial
de la muestras

Rellenar hasta la línea