horiba D-72 User manual

Portable pH/ORP Meter
D-72
Instruction Manual
CODE:GZ0000333604

I
Preface
This manual describes the operation of the Portable pH/ORP Meter D-72.
Be sure to read this manual before using the product to ensure proper and safe
operation of the product. 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
・Microsoft, Windows, Windows Vista are registered trademarks or trademarks of
Microsoft Corporation in the United States and other countries.
Other company names and brand names are either registered trademarks or trademarks
of the respective companies. (R), (TM) symbols may be omitted in this manual.
CODE:GZ0000333604
August, 2013 2013 HORIBA, Ltd.

Check items
II
■Items in package
After opening the package, check for damage on the instrument and that the standard
accessories (see below) all exist.
If damage or defects are found on the product, contact your dealer.
Note
・The accessories are not waterproof.
・The supplied alkaline batteries are used to check operation, thus it is possible that the
battery will be run out quickly.
Instrument Instruction manual
(this book)
Quick-start Manual AAA alkaline batteries

Regulations
III
■Conformable Directive
This equipment conforms to the following directives and standards:
●Installation Environment
This product is designed for the following environment.
・Overvoltage Category II
・Pollution degree 2
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
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 2002/96/EC, 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.
Directives: The EMC Directive 2004/108/EC
The Low Voltage Directive 2006/95/EC
The RoHS Directive 2011/65/EU
Standards: [the EMC Directive] EN61326-1:2006
Class B, Basic requirements
[the Low Voltage Directive] EN61010-1:2010(Ed.3.0)
[the RoHS Directive] EN50581:2012
Category: 9. Monitoring and control instruments

Regulations
IV
■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

For your safety
V
■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
This indicates an imminently hazardous situation which, if
not avoided, will result in death or serious injury. This 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.
Without safety alert indication of hazardous situation
which, if not avoided, could result in property damage.
Description of what should be done, or what should be followed
Description of what should never be done, or what is prohibited

For your safety
VI
■Safety precautions
This section provides precautions for using 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.
●Instrument and electrode
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 instrument.
Otherwise, it may heat up or be ignited resulting in a fire or an accident.
CAUTION
Harmful chemicals
The internal solution of pH electrode is highly concentrated potassium
chloride (3.33 mol/L KCl). If the internal solution comes in contact with the
skin, wash it off immediately. If it gets into the eyes, flush with plenty of water
and then consult a doctor.
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 RS-232C communication and the AC adapter under wet or
humid conditions. Otherwise, it may cause a fire, electric shock, or
breakage.

For your safety
VII
●Battery
WARNING
Keep batteries out of reach of children. If someone accidentally swallows a
battery, consult a doctor immediately.
If alkaline fluid from a battery gets into the eyes, do not rub the eyes, rinse
with clean water immediately and then consult a doctor.
Contact with alkaline fluid could cause blindness.
Do not put batteries in a fire, expose to heat, disassemble or remodel.
Doing so could case fluid leakage, overheating or explosion.
CAUTION
Do not remove or scratch the external label of the battery.
Doing so could cause injury to hands and fingers.

For your safety
VIII
■Product handling information
●Operational precautions (instrument)
・Do not drop, crash, or give any physical impact on the instrument.
・The instrument is made of solvent-resistant materials but that does not mean it is
resistant to all chemicals. Do not dip the instrument in strong acid or alkali solution, or
wipe with such solution.
・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).
・The instrument has a dust-proof and waterproof structure. Waterproof performance is
following specification: the instrument does not malfunction even when immersed in
water of 1 m depth for 30 minutes.
This does not mean to guarantee non-destructive, trouble-free, dust-proof, and
waterproof performance in all situations. If the instrument is correctly handled
according to the descriptions in this manual, the instrument provides dust-proof and
waterproof performance.
・When replacing the batteries, while connected to the AC adapter, or during the RS-
232C communication, the instrument does not have the dust-proof and waterproof
performance. The dust-proof and waterproof performance is maintained only when the
covers are attached correctly.
・After replacing the batteries, connecting the AC adapter, and using the RS-232C
communication, make sure that the waterproof packing attached to each cover is not
deformed or discolored, or has foreign matter adhering to it. If the waterproof packing
is deformed, discolored or has foreign matter adhering to it, or dust could get inside,
water leaks could occur that could lead to instrument malfunction.
・To disconnect an electrode or AC adapter cable or serial cable, hold the connector and
pull it off. If you pull at the cable, it may cause a breakage.
・The RS-232C communication between the instrument and a personal computer (PC)
may fail because of environmental conditions, such as (radio/electromagnetic) noise.
・Do not replace the batteries, connect the AC adapter, or use the RS-232C
communication in a dusty place or with wet hands. Dust or moisture could get inside
the instrument, possibly causing instrument malfunction.
・Do not use the tip of a nail or an object with a sharp end to press the keys.
・If the power supply is interrupted while measurement data is being saved in the
instrument, the data could be corrupted.
・A NiMH rechargeable battery can be used in this instrument, but the battery used in
the instrument cannot be charged using the AC adapter.

For your safety
IX
●Operational precautions (battery)
・Do not short circuit a battery.
・Set the + and side of the battery correctly.
・When the battery has run out or the instrument will not be used for a long time, remove
the batteries.
・Of the specified battery types, make sure to use two batteries of the same type.
・Do not use a new battery together with a used battery.
・Do not use a fully charged nickel-metal hydride battery together with a partially
charged battery.
・Do not attempt to charge a non-rechargeable battery.
●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.
・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.
・When disposing of the product, follow the related laws and/or regulations of your
country for disposal of the product.

For your safety
X
■Manual information
●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.
Note
Reference
Tip

Contents
XI
Preface ................................................................................... I
■Items in package..................................................................II
■Hazard classification and warning symbols .................... V
■Safety precautions ............................................................ VI
■Product handling information ........................................ VIII
■Manual information ............................................................ X
Part names and basic operation......................................... 1
■Names of each part .............................................................2
●Instrument....................................................................................2
●Display .........................................................................................3
●Operation key ..............................................................................5
■Basic operation....................................................................6
●Changing the operation mode ...................................................6
●Changing the measurement parameter ....................................7
●Using the backlight.....................................................................7
●Entering numeric values ............................................................8
Measurement ........................................................................ 9
■Preparation.........................................................................10
●Confirmation before starting measurement ...........................10
●Turning ON the instrument ......................................................11
●Setting the date and time .........................................................13
●Connecting an electrode ..........................................................14
■pH measurement ...............................................................15
●Setting the instrument ..............................................................15
●Performing calibration..............................................................18
●Performing measurement.........................................................25
■mV, ORP measurement.....................................................26

Contents
XII
●Setting the instrument.............................................................. 26
●Switching between absolute value and relative value .......... 27
●Performing measurement ........................................................ 28
Using various functions .................................................... 29
●Saving measurement data in the internal memory................ 30
●Displaying saved data .............................................................. 31
●Deleting all saved data ............................................................. 32
●Displaying the latest calibration and inspection data........... 33
●Deleting calibration data .......................................................... 35
●Printing measured values and calibration data ..................... 36
●Transferring saved data to a PC.............................................. 39
●Operating the instrument from an external device................ 40
●Using the automatic data save (default: OFF) .......................41
●Setting the ID number (default: 000) ....................................... 43
●Using the calibration interval alarm (default: OFF) ............... 44
●Calibrating temperature sensor .............................................. 45
●Changing the automatic power off setting (default: OFF) .... 46
●Performing test printing of the printer unit ............................ 47
●Resetting to factory default settings ...................................... 48
Maintenance ....................................................................... 49
●Maintenance and storage of the instrument .......................... 49
●Environmental conditions for storage.................................... 49
●Maintenance and storage of the pH electrode ....................... 50
●Maintenance and storage of the ORP electrode .................... 51
●Checking the state of the ORP electrode ............................... 52
How to resolve errors or troubles .................................... 53
■When an error message appears .....................................53
●ERR No.0001 Memory error................................................... 53

Contents
XIII
●ERR No.0002 Empty battery level .........................................54
●ERR No.0003 Electrode stability error..................................54
●ERR No.0004 Asymmetric potential error ............................54
●ERR No.0005 Electrode sensitivity error..............................55
●ERR No.0006 Maximum calibration points exceeded .........55
●ERR No.0007 Cannot identify standard solution.................55
●ERR No.0008 Calibration interval error ................................56
●ERR No.0009 Printer error .....................................................56
●ERR No.0010 Memory full ......................................................56
■Troubleshooting ................................................................57
●The indicated value fluctuates.................................................57
●The response is slow................................................................58
●The indicated value does not change/No response ..............58
●The measured value blinks ......................................................59
●The temperature display blinks or is fixed at 25°C ................59
●Repeatability of the measured value is poor..........................60
●Nothing appears when the power is turned ON .....................60
●Swelling of operation key sheet ..............................................60
●Part of the display is missing ..................................................61
Appendix............................................................................. 63
■Main specifications ...........................................................63
■Instrument default settings ..............................................64
■Technical note ...................................................................65
●pH measurement (glass electrode) .........................................65
●pH standard solutions at various temperatures ....................66
●ORP measurement ....................................................................67
■For more information ........................................................68
■Options ...............................................................................69

D-72 1
Part names and basic operation
This section describes the name of each part and the main role, function, and basic
operation method of each part.
■Names of each part...................................................................... 2
●Instrument.............................................................................................. 2
●Display.................................................................................................... 3
• Battery level display ..............................................................................................4
●Operation key ........................................................................................ 5
■Basic operation............................................................................ 6
●Changing the operation mode ............................................................. 6
●Changing the measurement parameter............................................... 7
●Using the backlight ............................................................................... 7
●Entering numeric values....................................................................... 8

Names of each part
2HORIBA
■Names of each part
●Instrument
No. Name Function
1 Display Displays the measured value and set value and so on.
2 Operation keys Used for instrument operation.
3 Electrode connector Connects the BNC connector of the electrode.
4 Temperature connector Connects the temperature connector of the electrode.
5 Battery cover Set batteries inside.
6Electrode hook
attachment section Attach the electrode hook to carry with instrument.
7 Strap attachment section Attach a strap.
8 Serial connector Connects the serial cable and printer cable.
9 AC power connector Connects an optional AC adapter.

Names of each part
D-72 3
●Display
No. Name Function
1Statusicon
Displays the current operation mode, electrode
status, printer or PC connection status, and
remaining battery level.
2 Direction key icon Displays the currently available direction key.
3Date and time, set item
display area
Displays the current date and time and the set
items.
4 ERR No. icon Displays an error No.
5 Data No. icon Displays the data No.
6Measurement parameter
display area Displays the currently set measurement parameter.
7 HOLD icon Lights when the measured value display is fixed.
8 SET icon Lights when numerical values are entered.
9 Temperature display area Displays the measured and the set temperature.
10 MTC icon Lights when the temperature setting is MTC
(optional temperature setting).
11 Measured value, set item
display area Displays the measured value and the set value.
12 Standard solution
calibration history icon
When calibrating pH standard solution, the
corresponding icon lights.
13 Unit display area Displays the unit for the measurement parameter
and the display item.
1
2
4
5
6
7
8
2
12 13
2
3
10 9
11

Names of each part
4HORIBA
• Battery level display
Battery level is high.
Battery level is a little lower.
Battery level is low.
The backlight may become unavailable.
Battery has run out. Replace the batteries.
"ERR No. 0002" is displayed and operation is disabled.