horiba DS-71 User manual

Instruction Manual
COND METER
DS-71

February, 2015 © 2011 2015 HORIBA, Ltd.
■Preface
This manual describes the operation of the DS-71 COND Meter.
Be sure to read this manual before using the product to ensure proper and safe
operation of the instrument. Also safely store the manual so it is readily available
whenever necessary.
Product specifications and appearance, as well as the contents of this manual
are subject to change without notice.
■Warranty and Responsibility
HORIBA, Ltd. warrants that the Product shall be free from defects in material and
workmanship and agrees to repair or replace free of charge, at option of
HORIBA, Ltd., any malfunctioned or damaged Product attributable to
responsibility of HORIBA, Ltd. for a period of one (1) year from the delivery
unless otherwise agreed with a written agreement. In any one of the following
cases, none of the warranties set forth herein shall be extended;
・Any malfunction or damage attributable to improper operation
・Any malfunction attributable to repair or modification by any person not
authorized by HORIBA, Ltd.
・Any malfunction or damage attributable to the use in an environment not
specified in this manual
・Any malfunction or damage attributable to violation of the instructions in this
manual or operations in the manner not specified in this manual
・Any malfunction or damage attributable to any cause or causes beyond the
reasonable control of HORIBA, Ltd. such as natural disasters
・Any deterioration in appearance attributable to corrosion, rust, and so on
Replacement of consumables
HORIBA, LTD. SHALL NOT BE LIABLE FOR ANY DAMAGES RESULTING
FROM ANY MALFUNCTIONS OF THE PRODUCT, ANY ERASURE OF DATA,
OR ANY OTHER USES OF THE PRODUCT.
■Trademarks
Company names and brand names are either registered trademarks or
trademarks of the respective companies. (R), (TM) symbols may be omitted in
this manual.

REGULATIONS
I
■Conformable Directive
This equipment conforms to the following directives and standards:
●Installation environment
This product is designed for the following environment.
- Overvoltage category II
- Measurement category I
WARNING: Do not use the equipment for measurements within
measurement categories II, III and IV.
●Information on disposal of electrical and electronic equipment and
disposal of batteries and accumulators
REGULATIONS
EMC: EN61326-1
Class B, Basic electromagnetic environment
Safety: EN61010-1
RoHS: EN50581
9. Monitoring and control instruments
Warning: This product is not intended for use in industrial environments. In an
industrial environment, electromagnetic environmental effects may
cause the incorrect performance of the product in which case the user
may be required to take adequate measures.
The crossed out wheeled bin symbol with underbar shown on the
product or accompanying documents indicates the product requires
appropriate treatment, collection and recycle for waste electrical and
electronic equipment (WEEE) under the Directive 2012/19/EU, and/or
waste batteries and accumulators under the Directive 2006/66/EC in
the European Union.
The symbol might be put with one of the chemical symbols below. In
this case, it satisfies the requirements of the Directive 2006/66/EC for
the object chemical.
This product should not be disposed of as unsorted household waste.
Your correct disposal of WEEE, waste batteries and accumulators will
contribute to reducing wasteful consumption of natural resources, and
protecting human health and the environment from potential negative
effects caused by hazardous substance in products.
Contact your supplier for information on applicable disposal methods.

REGULATIONS
II
■FCC Rules
Any changes or modifications not expressly approved by the party
responsible for compliance shall void the user's authority to operate the
equipment.
●Warning
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. 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.
■Korea Certification
●
■Taiwan Battery Recycling Mark

SAFETY OPERATION
III
■Hazard Classification and Warning Symbols
Warning messages are described in the following manner. Read the
messages and follow the instructions carefully.
●Hazard classification
●Warning symbols
SAFETY OPERATION
This indicates an imminently hazardous situation which, if not
avoided, will result in death or serious injury. This signal word
is to be limited to the most extreme situations.
This indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
This indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury. It may also be
used to alert against unsafe practices.
Description of what should be done, or what should be followed
Description of what should never be done, or what is prohibited

SAFETY OPERATION
IV
■Safety Precautions
This section provides precautions to enable you to use the product
safely and correctly and to prevent injury and damage. The terms of
DANGER, WARNING, and CAUTION indicate the degree of imminency
and hazardous situation. Read the precautions carefully as it contains
important safety messages.
WARNING
Do not use an unspecified AC adapter.
Otherwise, it may heat up or be ignited resulting in a fire or an accident.
Do not disassemble or modify the meter.
Otherwise, it may heat up or be ignited resulting in a fire or an accident.
Fire
• For your safety, make sure to unplug the power plug from the electrical outlet
when not in use.
• Clear dust on the power plug periodically (a few times a year).
If the power supply cord is left plugging into the electrical outlet for a long period of
time, electrical tracking may occur due to dust and moisture, and it may result in an
ignition or a fire.
Fire or electric shock
• Do not bundle the power supply cord during use.
• Do not damage the power supply cord nor apply an excessive load to it, such as
bending and stretching it repeatedly, putting a heavy thing on it.
• If it can not be plugged into an electrical outlet firmly, stop use of the power
supply cord.
If may result in overheating, a fire, an electrical shock, or breakdown.
CAUTION
Broken glass
Broken glass may cause injury.
The outer tube and tip of an electrode are made of glass.
Handle them with care.
Do not use the cable of serial communication, USB, or AC adapter under wet or
humid conditions.
Otherwise, it may cause an fire, electric shock, or breakage.

SAFETY OPERATION
V
■Product Handling Information
●Operational precautions
●Only use the product including accessories for their intended
purpose.
●Do not drop, crash, or give any physical impact on the instrument.
●Do not immerse the instrument into alcohol, organic solvent, strong
acid, strong alkaline, or the like. The instrument body contains ABS
resin, acrylic resin, and some rubber parts.
●If the instrument is dropped into water or gets wet, wipe it using soft
cloth. Do not heat to dry it with a hair-dryer (or the like).
●Use fingers to press the operation keys or the touch panel.
Do not use a hard object like a metal stick or rod.
●Be careful not to let water into the instruction inside.
The instrument is not water-proof.
●To disconnect an electrode or interface cable, hold the connector and
pull it off. If you pull at the cable, it may cause a breakage.
●The touch panel is capacitance-type. Make sure to turn OFF the
power before cleaning the panel. If you wipe it with the power ON, it
may cause instrument malfunction.
●RS-232C or USB communication between the instrument and a per-
sonal computer may fail because of environmental conditions, such
as (radio/electromagnetic) noise.
●Make sure to use the provided power supply cable to power this
product.
●Environmental conditions for use and storage
●Temperature: 0C to 45C
●Humidity: under 80% in relative humidity and free from
condensation
Avoid the following conditions:
●Dusty environment
●Strong vibration
●Direct sunlight
●Corrosive gas environment
●Close to an air-conditioner
●Direct wind
●Transportation
When transporting the instrument, repackage it in the original package
box. Otherwise, it may cause instrument breakage.
●Disposal
Standard solution used for the calibration must be under neutralized
before the disposal. As for the disposal of the meter, treat it as an
industrial waste.

MANUAL INFORMATION
VI
■Description in This Manual
This interprets the necessary points for correct operation and notifies
the important points for handling the product.
This indicates the part where to refer for information.
This indicates reference information.
■Original Language
This is the English translation of an original Japanese document.
HINT!

CONTENTS
VII
Chapter 1 About the DS-71 . . . . . . . . . 1
Chapter 2 Information of the DS-71 . . 2
2.1 Measurement Items . . . . . . . . . . . . . . . . . . . . . . . 2
2.2 Packing List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.3 Names and Functions . . . . . . . . . . . . . . . . . . . . . 4
2.3.1 Names of Each Part . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.3.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.3.3 Operation Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.4 Measurement (MEAS) Flow Chart . . . . . . . . . . . 7
2.5 Setting (SET) Flow Chart . . . . . . . . . . . . . . . . . . . 8
2.6 Data (DATA) Flow Chart . . . . . . . . . . . . . . . . . . . 9
Chapter 3 Basic Operation . . . . . . . . 10
3.1 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1.1 Assembling the Electrode Stand . . . . . . . . . . . . . . . 10
3.1.2 Electrode Connection . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1.3 Connecting the Power Source . . . . . . . . . . . . . . . . . 12
3.1.4 Connecting and Setting the Printer . . . . . . . . . . . . . 13
3.1.5 Connecting the Personal Computer . . . . . . . . . . . . . 14
3.2 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.2.1 Temperature Compensation Function Setting . . . . . 15
3.2.2 Auto Data Memory Setting . . . . . . . . . . . . . . . . . . . . 17
3.2.3 Sample ID Setting . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.2.4 Conductivity Unit Setting . . . . . . . . . . . . . . . . . . . . . 19
3.2.5 Conductivity Temperature Coefficient Setting . . . . . 20
3.2.6 Conductivity Cell Constant Setting . . . . . . . . . . . . . . 21
3.2.7 Salinity Unit Setting . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.2.8 Auto Printer Setting . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.2.9 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.3 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
3.3.1 Conductivity Calibration . . . . . . . . . . . . . . . . . . . . . . 39
3.3.2 Salinity Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . 40

CONTENTS
VIII
3.3.3 Calibration Value Printing . . . . . . . . . . . . . . . . . . . . . 42
3.4 Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
3.4.1 Measurement Value Hold . . . . . . . . . . . . . . . . . . . . . 43
3.4.2 Measurement Items Changing . . . . . . . . . . . . . . . . . 44
3.4.3 Auto Data Memory . . . . . . . . . . . . . . . . . . . . . . . . . . 45
3.4.4 Measurement Value Printing . . . . . . . . . . . . . . . . . . 46
3.5 Data Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 49
3.5.1 Data Memory of Measurement Value . . . . . . . . . . . . 49
3.5.2 Memory Data Display . . . . . . . . . . . . . . . . . . . . . . . . 50
3.5.3 Memory Data Printing . . . . . . . . . . . . . . . . . . . . . . . . 51
Chapter 4 Maintenance and
Troubleshooting . . . . . . . . 53
4.1 Conductivity Electrode Maintenance . . . . . . . . 53
4.2 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . 54
4.2.1 Error Message Chart . . . . . . . . . . . . . . . . . . . . . . . . 54
4.2.2 More Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . 58
Chapter 5 Specifications . . . . . . . . . . 62
5.1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
5.2 Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . 64
5.3 Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Chapter 1 About the DS-71
DS-71 1
Chapter 1 About the DS-71
The desktop type COND meter DS-71 is optimized for
laboratory measurement, and allows you to measure
conductivity, resistivility, salinity, and TDS.
It provides a comfortable measurement environment
with the design easy to wipe clean without roughness on
the surface, and the free-standing electrode stand and
the custom LCD for ease of measurement.

Chapter 2 Information of the DS-71
2.1 Measurement Items
2HORIBA
Chapter 2 Information of the DS-71
2.1 Measurement Items
Measurement item DS-71
Conductivity 
Salinity 
Resistivity 
TDS
(Total Dissolved Solids) 
Temperature 

Chapter 2 Information of the DS-71
2.2 Packing List
DS-71 3
2.2 Packing List
The DS-71’s package includes the following.
Electrodes are required for the measurement in addition
to this package. If you want to buy an electrode, contact
HORIBA sales representative.
Product Quantity
Main unit 1
Electrode stand 1
Instruction Manual 1
Quick Manual 1
AC adapter 1
Ferrite core 1

Chapter 2 Information of the DS-71
2.3 Names and Functions
4HORIBA
2.3 Names and Functions
2.3.1 Names of Each Part
Stand arm
Stand base
Operation key
Stopper
Display
CH2 reference electrode
CH2 measurement electrode
CH2 temperature electrode
AC adapter connector Printer connector

Chapter 2 Information of the DS-71
2.3 Names and Functions
DS-71 5
2.3.2 Display
Connector for USB communication with a personal computer
Setting mode
Error No.,
Data No.,
Date
HOLD
indicator
Measuring
parameter
Calibration
status
Electrode status icon
Printer connecting icon
Data memory icon
Temperature
USB icon
Measurement
unit

Chapter 2 Information of the DS-71
2.3 Names and Functions
6HORIBA
2.3.3 Operation Key
This instrument employs capacitance switches.
You can not operate them with thick gloves. Operate
them with bare hands or thin rubber gloves.
Press the POWER key for 1 second or longer to turn ON the
power, for 2 seconds or longer to turn OFF the power.
Operation key Function
CAL key Starts/stops calibration or enters the
calibration mode.
MEAS key Starts/stops measurement or enters the mea-
surement mode.
Applies the setting values of the setting
mode.
DATA key Enters the data operation mode.
Printouts calibration value.
SET key Enters the setting mode.
Cancels the setting values of the setting
mode.
MODE key Toggles the measurement items.
▲key
▼key
Increases the values.
Decreases the values.
Switches the setting item.
Switches the CH items.
key Change number of digits, selects functions.
Printouts measurement values. ( key)
ENTER key Settlement, execution, prinout
(except measurement values)
Start/stops automatic data memory.
POWER key Turns ON or OFF the power.
▼
▲
▼

Chapter 2 Information of the DS-71
2.4 Measurement (MEAS) Flow Chart
DS-71 7
2.4 Measurement (MEAS) Flow Chart
COND measurement
MODE key
Resistivity measurement
MODE key
Salinity measurement
MODE key
TDS measurement
MODE key

Chapter 2 Information of the DS-71
2.5 Setting (SET) Flow Chart
8HORIBA
2.5 Setting (SET) Flow Chart
Conductivity
unit setting
▲▼ key
S/cm, S/m, mS/cm
FIX
Conductivity temperature
coefficient setting
▲▼ key
Input range: 0.00% to 10.00%
▲▼ key
Conductivity
cell constant setting
×10, ×100, ×1000 /m
×0.1, ×1, ×10 /cm
Input range: 0.700 to 1.300
Salinity unit setting PPT, %
▲▼ key
Temperature compensation
function setting
ATC, MTC
▲▼ key
Automatic data memory
setting
▲▼ key
ON, OFF
▲▼ key
Sample ID setting
Automatic printout setting
▲▼ key
ON, OFF
Maintenance
▲▼ key
LCD Check, Printer Test, Auto Power Off Set-
tings, Day and Time Settings, Memory Data
Deleting, Calibration Data Deleting, Number of
Memory Data Display, Temperature Calibration,
Setting Value Initialization, Password Settings