horiba DS-51 User manual

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■Preface Thank you for purchasing the DS-51 conductivity meter.
This meter has a large-sized LCD display, which enables to use the
varied functions by simple operations, and especially will be
convenient to use in laboratory.
Carefully read this manual before using the meter.
Warranty and Responsibility
Your meter is covered by warranty for a period of one(1)
year, under normal use. Although unlikely, if any trouble attributable
to us should occur during this period, necessary exchange or
repairs shall be conducted by us,free of charge. The
warranty does not cover the following:
• Any trouble or damage attributable to actions or conditions
specifically mentioned to be avoided in the operation
manuals
• Any trouble or damage attributable to use of the meter in
ways or for purposes other than those described in the
operation manuals
• If any repairs renovations, disassembly, etc. are performed
on this meter by any partyother than us or aparty
authorized by us
• Any alteration to the external appearance of this meter
attributable to scratches, dirt, etc. occurring through normal
use
• Wear and tear to parts, the exchange of accessories, or the
use of any parts not specified by us
We also shall not be liable for any damages resulting from
any malfunctions of this product, any erasure of data, or any other
uses of this product.

Precautions for use
I
■CE Marking
This product is in conformity with the following directives and
standards:
Directives:The EMC Directives 89/336/EEC
The Electrical Product Safety Directive 73/23/EEC
Standards: EN61326: 1997+A1:1998
(EMISSION: Class B, IMMUNITY Category: Minimum
Requirement)
EN61010-1: 2001
Installation Environment
This product is designed for the following environment.
- Pollution degree 2
- Measurement category Ⅰ
WARNING:Do Not use the equipment for measurements within
measurement categories
Ⅱ,Ⅲ and Ⅳ .
■FCC Warning
This equipment has been tested and found to comply withthe 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 b e r e q u i r e d t o c o r r e c t
the interference at his own expense.

Precautions for use
II
■Type and Definition of Signal Words
For the safety use, the meter is equipped with the Warning Labels to
alert every operator and user to the possible risk and danger. Before
using understanding each message.
The meaning of signal words are as follows:
■Safety Precautions
For the safety use, be sure to read the following precautions:
WARNING:
●Do not use any unspecified AC adapters.
Heat or fire may occur to cause fire or accidents.
●Do not disassemble or modify the meter.
Heat or fire may occur to cause fire or accidents.
CAUTION:
●Do not use the serial communication or AC adapter in the place that
may possibly contact with moisture.
It may cause fire, electric shock, or breakage.
●Part of the electrode is made of glass; handle with care not to break
it.
(WARNING)This indicates an potentially hazardous situation which,
if not avoided, will result in death or serious injury.
(CAUTION)This indicates a potentially hazardous situation which, if
not avoided, may result in minor or moderate injury. It
may also be used to alert unsafe practices.

Precautions for use
III
●Indication
WARNING
This indicates an potentially hazardous situation which, if not avoided,
will result in death or serious injury.
CAUTION
This indicates a potentially hazardous situation which, if not avoided,
may result in minor or moderate injury. It may also be used to alert
unsafe practices.
This mark indicates the operation requires a special care and attention.
This mark indicates to which the reader should go for reference.
This mark indicates reference information.
HINT!

Precautions for use
IV
■Cautionary Items
●Precautions
●Do not give physical shock to the meter like dropping or hitting.
●Avoid water or solution from being contact with the meter body.
Water or solution, if contacts with the meter, may cause the meter
breakage.
●To remove the dirt on the meter, wipe it off with dry and soft cloth as
silicone cloth. (Do not use water)
●Do not pour water to the electrode and/or the connector part of the
meter body. Do not touch with dirty or wet hands.
●The electrode and/or the connector part of the meter body requires
high insulation. Contact with water or with dirty hands may bring
defective insulation, to cause indication fluctuation or erroneous mea-
surement values. Sometimes the electrode itself may be damaged to
an unrecoverable level.
●Perform the key operation by the fingers, not by the hard object like
metal stick or rod.
●To disconnect the electrode cable or interface cable, pull them out
with holding the connector part. Do not pull the cable part; it may
cause a breakage.
●Do not use any unspecified batteries ; it may cause a breakage.
●Location of use and storage
●The place which room temperature is at 0 ℃to 45 ℃
●The place which relative humidity is under 80% and free from condensation
Do not use or store the meter at;
●The place of much dust
●The place with strong vibration
●The place with direct sunlight
●The place with corrosive gas generation
●The place near from an air-conditioner
●The place with direct wind
●Move and Transportation of the meter
To transport the meter, use the packaging box at the delivery.
Transportation by any unspecified packing methods may cause a
breakage.
●Disposal Standard solution used for the calibration must be under neutralization
before the disposal. As for the disposal of the meter, treat it as an
industrial waste.

TABLE OF CONTENTS
DS-51 V
Chapter 1 Overview of COND Meter . . . . . . 1
1.1 Package contents.......................................................... 1
1.2 Functions........................................................................ 2
1.3 Explanation of part names............................................ 4
1.3.1 Meter body ....................................................................................4
1.3.2 Display ...........................................................................................4
1.4 Operation keys............................................................... 6
1.5 Assembling the electrode stand .................................. 7
1.6 Connecting the electrodes............................................ 8
1.7 Inserting/replacing the dry-cell batteries .................... 10
1.8 Connecting the AC adapter .......................................... 11
Chapter 2 Taking Measurements . . . . . . . . . 13
2.1 Turning the meter ON/OFF............................................ 13
2.2 Settings required before measurement....................... 13
2.3 Measurement modes..................................................... 14
2.4 Selecting the measurement modes ............................. 15
2.5 Conductivity measurement........................................... 16
Chapter 3 Functions . . . . . . . . . . . . . . . . . . . 23
3.1 Data memory function................................................... 23
3.2 Displaying and setting the clock.................................. 25
3.3 Setting modes................................................................ 26
3.3.1 Entering the Setting mode .............................................................26
3.3.2 Temperature compensation setting ...............................................28
3.3.3 Conductivity unit setting .................................................................29
3.3.4 Temperature coefficient setting .....................................................29
3.3.5 Sample ID# setting ........................................................................30
3.3.6 Maintenance mode ........................................................................31
Chapter 4 RS-232C communications . . . . . 39
4.1 Cautions before use...................................................... 39
4.2 Command list................................................................. 40
4.3 On-line operation commands....................................... 42
4.4 Data request commands and responses..................... 46
4.5 Communication example using the Hyper Terminal.. 54

TABLE OF CONTENTS
VI HORIBA
Chapter 5 Printer . . . . . . . . . . . . . . . . . . . . . . 57
5.1 Connecting the printer.................................................. 57
5.2 Printer setting ................................................................ 58
5.3 Printer output timing..................................................... 59
5.4 Printing format............................................................... 60
5.4.1 When the ENTER key is pressed in the Measurement mode ....... 60
5.4.2 When the manual data memory is performed
in the Measurement mode ............................................................. 61
5.4.3 When the ENTER key is pressed
in the Data Memory Call screen .................................................... 62
5.4.4 When calibration or check is performed in the Calibration mode .. 62
5.4.5 Test printing format in the Maintenance mode .............................. 62
Chapter 6 Maintenance and Troubleshooting 63
6.1 Conductivity electrode maintenance........................... 63
6.2 Troubleshooting ............................................................ 64
6.2.1 Error message chart ...................................................................... 64
6.2.2 More troubleshooting ..................................................................... 68
Chapter 7 Reference . . . . . . . . . . . . . . . . . . . 71
7.1 Conductivity measurement .......................................... 71
7.2 Specifications ................................................................ 77
7.3 Default settings.............................................................. 80
7.4 Operation flowcharts..................................................... 81
7.5 Pin layout of special cables.......................................... 82
7.5.1 RS-232C communications cable ................................................... 82
7.5.2 Cable for CITIZEN printer .............................................................. 82
7.5.3 Cable for SEIKO printer ................................................................. 82
7.6 Spare and optional parts .............................................. 83
7.6.1 Optional parts ................................................................................ 84

Chapter 1 Overview of COND Meter
1.1 Package contents
DS-51 1
Chapter 1 Overview of COND Meter
This chapter explains the part names, how to connect the electrodes,
how to replace the batteries, and precautions when using themeter.
1.1 Package contents
The following items are shipped with each HORIBA COND meter.
To take measurements, you will need electrode(s).
Refer to "7.6 Spare and optional parts" page 83 when purchasing the
electrode(s).
Name Q’ty
Meter 1
Stand 1
Dry-cell batteries 4
Operation manual 1
AC adapter 1

Chapter 1 Overview of COND Meter
1.2 Functions
1.2 Functions
The COND meter features the following functions.
●Measurement items
●Functions An overview of the functions found on the COND meter is shown below.
Items Required electrode/standard solution
Conductivity Conductivity electrode
Conductivity standard solution
Salinity
Resistivity
Temperature −
Function Explanation Page
No.
Data memory Enables a maximum of 300 items to be
stored. page
23
Clock The date and time are displayed. page
25
Auto Power OFF Turns ON/OFF setting that automatically
turns power OFF if no keys are touched for
30 minutes.
page
35
RS-232C
communications Enables communication with a computer, using RS-232C. page
39
Printer output Prints the contents of the memory (printer
sold separately). page
57
Commercial
power supply Enables the use of commercial power, using an AC adapter. page
57

Chapter 1 Overview of COND Meter
1.2 Functions
DS-51 3
●Setting Items
RS-232C communications and the printer cannot be used simultaneously.
●Functions in Maintenance mode
Function Explanation Page
No.
Sample ID ID No. of the sample page
30
Temperature
compensation Enables temperature compensation to be conducted in pH Measurement mode,
either manually or using a temperature
sensor.
page
28
COND unit Toggles between S/m and S/cm. page
29
COND
temperature
coefficient
Automatically or manually sets a
temperature coefficient for a sample. page
29
Name Explanation Page
No.
LCD check Enables check for whether or not all LCD
segments are displayed.page
32
Battery voltage
check Enables simple check of battery voltage.page
33
Temperature
zero adjustment Carries out temperature calibration.page
34
Auto Power OFF Sets the function that automatically turns
the power OFF if no keys are touched 30
minutes.
page
35
Remaining data
memory Displays the remaining memory.page
36
Data memory
clear Deletes data in memory.page
36
Initializing
settings Initializes all settings to the default values. page
37
Printing test Conducts a printing test. page
38

Chapter 1 Overview of COND Meter
1.3 Explanation of part names
1.3 Explanation of part names
The COND meter has the following parts:
1.3.1 Meter body
1.3.2 Display
Serial communication
connector
CH1 measurement
electrode
CH1 temperature
electrode
Grounding
AC connector
エラーNo.
測定データ
校正履歴
設定モード
設定モードガイド
入力 CH
温度、月日
秒
測定単位
データ No.
年
状態表示
時分
選択カーソル
HOLD
装置モード
Status display
Calibration history
Input channel
HOLD
Second
Meter mode
Temperature,
month and day
Measurement data,
hour and minute
Error No.,
Data No.
Year,
Status display
Cursor for selecting
setting mode
Setting mode guide
Measurement
unit
Part name Display Contents
Input channel Input channel 1
Measurement
item Conductivity Measurement mode
Error No. Displayed when an error is generated
Data No. Displayed when data number has been set.

Chapter 1 Overview of COND Meter
1.3 Explanation of part names
DS-51 5
Status display
−
−
−
Shows error number and data number.
Displayed when the serial communication is
active.
Displayed when temperature compensation
function or automatic temperature compensation
has been set.
Displayed during data memory function (for 3
sec.).
Displayed while data in memory is being called up
and when manual data memory is being called up.
Displayed when aprinter is connected.
(Sometimes displayed when a computer is
connected
depending on the computer.)
Displayed during manual temperature
compensation.
Not displayed during automatic temperature
compensation.
HOLD Displayed while the data is held (HOLD status).
Blinks during measurement or calibration.
Meter mode Displayed when in Measurement mode.
Displayed when in Calibration mode.
Part name Display Contents

Chapter 1 Overview of COND Meter
1.4 Operation keys
1.4 Operation keys
This section describes the functions of the keys.
The automatic power-off function is a default setting for this CONDmeter. The
power is automatically turned OFF if no operation is performed after a period of
approximately 30 minutes.
Name Description
MEAS key Returns to the Measurement mode.
Starts measurement.
MODE key Selects measurement item.
SET key Selects setting item.
CELL key Enters the Cell Constant Setting
mode.
UP key Executes the data memory function.
Increases numerical values.
ENTER
key Establishes the setting.
DOWN key Calls up data memory. Decreases
numerical values.
ON/OFF
key Turns ON/OFF the power. This key takes effect only after pressed for one
second to prevent accidental
operation.

Chapter 1 Overview of COND Meter
1.5 Assembling the electrode stand
DS-51 7
1.5 Assembling the electrode stand
1. Mount the electrode stand on the rear of the meter as shown in the
figure below.

Chapter 1 Overview of COND Meter
1.6 Connecting the electrodes
1.6 Connecting the electrodes
Connect the electrodesto the COND meter using the following
procedure:
・Do not allow any water to come into contact with the connector.
・Do not touch the connector with uncleaned hands.
・Hold the metal portion when turning the electrode connector.
●Electrode connector
1. Insert the electrode connector, making sure to align the connector
grooves with the pins in the connector port on the main unit.
Do not push the electrode connector with undue force when the
pins are not properly aligned.
2. Push the electrode connector into the connector port while turning
it clockwise, following the grooves.
3. Push the connector cover over the connector, b e i n g c a r e f u l t o
push it straight on without turning it.
CH1 measurement
electrode
CH1 temperature
electrode
CH1 measurement electrode
Connector cover

Chapter 1 Overview of COND Meter
1.6 Connecting the electrodes
DS-51 9
●Temperature connector
1. Insert the temperature connector into the jack on the main unit of
the COND meter.
When the temperature electrode is not connected (or is connected improperly),
the automatic temperature compensation (ATC) will be 25°C .

Chapter 1 Overview of COND Meter
1.7 Inserting/replacing the dry-cell batteries
10
1.7 Inserting/replacing the dry-cell batteries
The dry-cell batteries are not placed in the COND meter before
shipping. To insert the batteries, follow the procedure below.
Note that if “ERR 2” appears on the display while using the COND
meter, it indicates that the charge of the dry-cell batteries is running low.
When this occurs, replace the batteries promptly.
Dry-cell battery type:AA alkaline
・Insert the battery, paying attention to the orientation of the battery poles (“+”
and “-“).
・Removing the batteries will erase the clock data. To save the clock data,
remove and replace the batteries while the meter is connected to the AC
adapter.
・Replace the batteries only after turning the power OFF. Any saved data will
not be lost.
・When opening and closing the battery cover, be careful that no water gets
inside the meter.
The life of batteries included with the COND meter may be short because the
batteries were used for the operation check before shipping.
To insert/replace the batteries
1. Remove the battery cover on the bottom of the meter and set the
dry-cell batteries (4 pcs.) in the correct direction.
Battery life
The life of alkaline batteries during continuous use is approx. 200 hours.
The life of manganese batteries is approx. 100 hours.
電池カバー
単3乾電池
（4本）
＋
−
＋
−
Battery cover
Dry-cell
battery

Chapter 1 Overview of COND Meter
1.8 Connecting the AC adapter
DS-51 11
1.8 Connecting the ACadapter
When using the meter with an AC power supply, use the designated AC
adapter.
AC adapter specifications
1. Connect the connector of the AC adapter to AC adapter
connecting port on the side of the meter.
.
Supply voltage range 100 - 200 V AC
Frequency range 50/60 Hz
Current rating Max 370 mA
Class2 Power supply
Equipment protected by
double insulation
Indoor use only
Supply voltage fluctua-
tions allowed up to ±10%
AC adapter connecting
port connecting port
AC adapter connecting
port