Hach POCKET TURBIDIMETER User manual

52600-18
POCKET TURBIDIMETER™
Analysis System
© Hach Company, 1997, 1998. dd/dp 4/15/97 1ed
All rights reserved. Printed in the U.S.A Rev. 2, 7/98

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CERTIFICATION
Hach Company certifies this instrument was tested thoroughly, inspected
and found to meet its published specifications when it was shipped from
the factory. The Pocket Turbidimeter Instrument has been tested and is
certified as indicated to the following instrumentation standards:
Immunity:
EN 50082-1:1997 (Generic Immunity Standard) per 89/336/EEC
EMC: Supporting test records by Hach Company, certified compliance
by Hach Company.
Required Standard/s include:
EN 61000-4-2 (IEC 1000-4-2) Electro-Static Discharge
EN 61000-4-3 (IEC 1000-4-2) Radiated RF Electro-Magnetic Fields
ENV 50204 Radiated Electro-Magnetic Field from Digital Telephones
Additional Standard/s include:
ENV 50204 “1995” Radiated Electro-Magnetic Field from
Digital Telephones

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Emissions:
EN 50081-1 (Generic Emission Standard) per 89/336/EEC EMC:
Supporting test records by Intellistor O.A.T.S., certified compliance by
Hach Company.
Required European Standard/s include:
EN 55011 (CISPR 11) Emissions, Class B Limits
Additional Emissions Standard/s include:
CANADIAN INTERFERENCE-CAUSING EQUIPMENT
REGULATION, IECS-003, Class A: Supporting test records by
Intellistor O.A.T.S., certified compliance by Hach Company.
This Class A digital apparatus meets all requirements of the Canadian
Interference-Causing Equipment Regulations.
Cet appareil numérique de la classe A respecte toutes les exigences du
Règlement sur le matériel brouilleur du Canada.

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FCC PART 15, Class “A” Limits: Supporting test records by Intellistor
O.A.T.S., certified compliance by Hach Company.
This device complies with Part 15 of the FCC Rules. Operation is subject
to the following two conditions:
(1) This device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may
cause undesired operation.
Changes or modifications to this unit not expressly approved by the
party responsible for compliance could void the user’s authority to
operate the equipment.
This equipment has been tested and found to comply with the limits
for a Class A digital device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a
commercial environment.

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This equipment generates, uses, and can radiate radio frequency energy
and, if not installed and used in accordance with the instruction manual,
may cause harmful interference to radio communications. Operation of
this equipment in a residential area is likely to cause harmful
interference, in which case the user will be required to correct the
interference at his own expense. The following techniques of reducing
the interference problems are applied easily.
1. Remove power from the Pocket Turbidimeter Instrument by removing
one of its batteries to verify that it is or is not the source of the
interference.
2. Move the Pocket Turbidimeter Instrument away from the device
receiving the interference.
3. Reposition the receiving antenna for the device receiving
the interference.
4. Try combinations of the above.

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TABLE OF CONTENTS
CERTIFICATION.................................................................................. iii
SAFETY PRECAUTIONS..................................................................... ix
SPECIFICATIONS................................................................................. xi
OPERATION........................................................................................ 1
General Description.................................................................................. 3
Principle of Operation............................................................................... 5
Battery Installation.................................................................................... 6
Preparing the Pocket Turbidimeter Sample Cell ...................................... 9
Oiling the Pocket Turbidimeter Sample Cell.......................................... 11
Indexing the Sample Cell........................................................................ 12
Using StablCal®Stabilized Standards..................................................... 13
Instructions for Preparing StablCal Stabilized Formazin Standards ...... 13
Precautions for Use of Standards............................................................ 15
Controlling Ambient Light ..................................................................... 16

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CALIBRATION.................................................................................... 17
Calibration Helpful Hints........................................................................ 17
CALIBRATION PROCEDURE.......................................................... 19
MEASURING TURBIDITY PROCEDURE...................................... 25
MAINTENANCE.................................................................................. 29
Helpful Hints........................................................................................... 29
Cleaning the Sample Cells and Caps...................................................... 31
GENERAL INFORMATION .............................................................. 37
PARTS AND ACCESSORIES............................................................... 39
WARRANTY ......................................................................................... 41
REPAIR SERVICE................................................................................. 43
TABLE OF CONTENTS, continued

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SAFETY PRECAUTIONS
As part of good laboratory practice, please become familiar with the
reagents used in these procedures. Read all product labels and the MSDS
(Material Safety Data Sheets) before using any chemicals. Please contact
Hach with questions about reagents or procedures.
Use of Hazard Information
If multiple hazards exist, the signal word corresponding to the greatest
hazard shall be used.
DANGER
Indicates an imminently hazardous situation
which, if not avoided, will result in death or serious injury
CAUTION
Indicates a potentially hazardous situation that may result in minor or moderate injury
NOTE
Information that requires special emphasis.

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Precautionary Labels
Please pay particular attention to labels and tags attached to the
instrument. Personal injury or damage to the instrument could occur if not
observed.
This symbol, if noted on the instrument, references the Instruction
Manual for operational and/or safety information.
Battery Installation on page 6.
The Pocket Turbidimeter Instrument is a Class 1 LED product. A Class 1
LED product has insufficient energy to be considered an eye hazard.

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SPECIFICATIONS
Range: 0.1 - 400 NTU
Accuracy: ≤5% of reading from 0-400 NTU or ±0.1 NTU (whichever is
greater) when calibrated using StablCal®Standards. Accuracy tested at
20-25 °C; accuracy may vary when the instrument is operated at
environmental extremes.
Resolution: 0.1 NTU below 100 NTU; 1 NTU from 100 to 400 NTU
Repeatability: ±5% of reading
Light Source: Infrared LED (Light Emitting Diode), 880 nm
Operating Temperature Range: 0 to 50 °C (instrument only)
Storage Temperature Range: -40 to 60 °C (instrument only)

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Storage Temperature Range: (StablCal Stabilized formazin only)
Short Term: -40 to 40 °C
Long Term: 5 to 20 °C
Operating Humidity Range RH Non-condensing: 0 to 90% at 30 °C;
0 to 80% at 40 °C; 0 to 70% at 50 °C
This is a Class 1 LED product.

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WARNING
Handling chemical samples, standards, and reagents can be dangerous. Review the
necessary Material Safety Data Sheets and become familiar with all safety procedures
before handling any chemicals. ADVERTÊNCIA
A manipulação de amostras, padrões e reagentes químicos pode ser perigosa. Reveja as
necessárias Fichas Técnicas de Segurança do Material e familiarizese com os
procedimentos de segurança antes de manipular quaisquer substãncias químicas.
ADVERTENCIA
La manipulación de muestras químicas, patrones y reactivos puede ser peligrosa. Antes
de manipular cualquier productor químico, conviene leer las Fichas Técnicas de
Seguridad y familiarizarse con los procedimientos de seguridad.
ATTENTION
La manipulation des échantillons chimiques, étalons et réactifs peut être dangereuse.
Lire les fiches de données de sécurité des produits nécessaires et se familiariser avec
toutes les procédures de sécurité avant de manipuler tout produit chimique.
WARNUNG
Da das Arbeiten mit chemikalischen Proben, Standards, Reagenzien und Abfällen mit
Gefahren verbunden ist, empfiehlt die Hach Company dem Benutzer dieser Produkte
dringend, sich vor der Arbeit mit sicheren Verfahrensweisen und dem richtigen
Gebrauch der Chemikalien oder Biogefahrgut vertraut zu machen und alle
entsprechenden Materialsicherheitsdatenblätter aufmerksam zu lesen.
OPERATION

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General Description
The Pocket Turbidimeter Instrument* measures turbidity and provides a
direct readout on the liquid crystal display from 0.0 to 400 NTU.
Designed primarily for field use, the Pocket Turbidimeter Instrument is
convenient, reliable, and easy to use and calibrate. The instrument
operates on four AAA batteries (battery-saving features are incorporated
into the software).
The instrument cap is used as a light shield during calibration and
measurement and provides a dust-free environment for the optics and
sample compartment when not in use.
The instrument is supplied with StablCal®Stabilized Formazin Standards
(1.0 NTU and 20 NTU), silicone oil, an oiling cloth, four AAA alkaline
batteries, six sample cells with caps, and this instruction manual all
contained in a 30 x 18 x 14 centimeter (12 x 7.5 x 5.5 inch) polypropylene
case. See Figure 1 on the next page.
* Patent Pending

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Figure 1 Packaging Guide
1. Oiling Cloth........................................................................................................................... 26873-00
2. Pocket Turbidimeter Instrument ............................................................................................ 52600-60
3. Instruction Manual ................................................................................................................ 52600-18
4. Sample Cells with press on caps, 6/pkg............................................................................... 52631-00
5. StablCal
1.0 NTU, 100 mL .................................................................................................................. 26598-42
20 NTU, 100 mL ................................................................................................................... 26601-42
6. Batteries, AAA Alkaline, 4/pkg.............................................................................................. 46743-00
7. Silicone Oil, 15 mL.................................................................................................................. 1269-36
3
6
4
1
5
7
2

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Principle of Operation
The Pocket Turbidimeter Instrument operates on the nephelometric
principle of turbidity measurement. The optical system includes an
infrared LED and detector to monitor scattered light. Variation in the LED
is automatically compensated, reducing calibration drift.
Calibration with StablCal®Stabilized Formazin Standards provides the
capability for direct readout in FNU or NTU*. The instrument design is
based on criteria specified in the ISO 7027 Turbidimeter Measurement
Standards.
Note: This product contains a Class 1 LED device which produces light at 880
±20 nm. A Class 1 LED represents no threat of injury to users of the product.
The optical system is comprised of an 880 ± 20 nm light emitting diode
(LED) assembly, a 90° detector to monitor scattered light, and an LED
monitoring detector. The instrument measures turbidity up to 400 units in
FNU/NTU measurement mode using the single 90° detector.
* 1 FNU = 1 NTU when the instrument is calibrated with formazin or stabilized formazin.

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Battery Installation
Caution: This product is designed to use only alkaline batteries. Use of other types of
batteries may result in damage to the instrument and injury to the user.
Prudence: Cet appareil est conçu pour utiliser seulement des piles alcalines.
L'utilisation d'autres types de piles peut endommager l'appareil et blesser l'opérateur.
Atenção: Só devem ser utilizadas neste produto pilhas alcalinas. A utilização de outros
tipos de pilhas pode ocasionar danos ao instrumento e ferimentos ao utilizador.
Atencion: Este producto ha sido diseñado para ser untilizado œnicamente con baterías
alcalinas. El uso de otro tipo de baterías puede provocar daños en el aparato y lesiones
al usuario.
Vorsicht: Dieses Produkt darf nur mit Alkalibatterien betrieben werden. Der Gebrauch
anderer Batterien kann das Gerät beschädigen und zu Verletzungen des Benutzers
führen.

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Figure 2 provides an exploded view of the battery installation. Loosen the
captive screw to remove the battery compartment cover. Place the four
batteries provided with the instrument in the holder as indicated (the
proper polarities are shown on the battery holder). Replace the battery
compartment cover and tighten the captive screw.
When power is applied, the display will momentarily show 88.8, then the
software version. If 88.8 does not appear momentarily on the display,
remove and reinsert one of the batteries. When replacing discharged
batteries, always replace the complete set of four. Rechargeable batteries
are not recommended and cannot be recharged in the instrument.
When the batteries are removed for replacement, all calibration
information is lost. Recalibration is required each time the batteries are
replaced. See CALIBRATION on page 17.

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Figure 2 Battery Installation