Sibata Aquab AQ-202 User manual

CODE 080560-202
Handy Water Meter
"AQUAB"
Model AQ-202
[ For Measurement of Residual Chlorine (High Concentration) ]
Thank you for purchasing this product.
zThis operation manual describes
important precautions for preventing
accidents as well as procedures for
handling the product.
zRead this operation manual and the
attached warranty thoroughly before
use, and use the product safely and
correctly.
zAfter reading this operation manual
and the warranty, keep them handy
for future reference.
2003-2016 SIBATA SCIENTIFIC TECHNOLOGY LTD.

2
Table of Contents
Page Page
Before Use zMemory Check Mode
zAbout This Operation Manual zUser Calibration Mode
zContents of Package Troubleshooting
Safety Precautions zError Displays
About This Product Inspections and
Maintenance
Names of Parts Main Specifications
Powder Reagents Consumables and
Related Parts
Using the Product Warranty and Repairs
zWorkflow Inquiries
zMeasurement Precautions
zMode Selection
zInserting the Batteries
zMeasurement
Be Sure to Read This
Page 4 lists important precautions for ensuring the safe use of the product, and for
preventing harm to you and other people and damage to property. Be sure to
thoroughly read these precautions before use and observe them.

3
Before Use
zRead and understand the instructions given in
this operation manual before using the product.
zKeep this operation manual handy for future
reference.
zFamiliarize yourself with the safety precautions
given in this operation manual and observe them.
zObserve usage procedures that are suitable for
the product and are specified in this operation
manual.
Be sure to observe the above instructions.
Failure to do so may result in an accident or injury.
zAbout This Operation Manual
zInformation in this operation manual is subject to change without notice in the interest of
product improvement.
zEvery effort has been made to ensure that the information in this operation manual is correct.
If you discover any errors or omissions, however, please contact your Sibata representative.
zThe copyright of this operation manual belongs to Sibata Scientific Technology Ltd.
This operation manual, or any part thereof, may not be reproduced, reprinted, or altered in
any form without prior written permission from Sibata Scientific Technology Ltd.
zContents of Package
Check the package for the following items before using the product.
zAQUAB body ·······1 unit zSample cells ····················2 pcs
zPowder reagent ···25 packs zAAA batteries
(for checking operation) ····· 4 pcs
zCarrying case ······1 pc zWarranty ························· 1 copy
zQuick Manual ······1 copy zOperation Manual
(this document) ······ 1 copy
Note: If any of the items are damaged or missing, contact your Sibata representative or the store
where you purchased the product.

4
Important
WARNING
CAUTION
Do Not Touch
Mandatory
Safety Precautions
The precautionary information in this operation manual is provided to ensure the safe use of the
product and to prevent property damage and injury to you and other people. It is all important for
ensuring safety, so be sure to read it thoroughly before using the product and observe it during
use.
zGraphical Symbols
This operation manual uses various graphical symbols to indicate warnings and instructions.
The meanings of these graphical symbols are as follows. Fully understand the following
descriptions before reading the subsequent sections.
Indicates a potentially hazardous situation which, if not avoided,
could result in serious injury or possibly death.
Indicates a potentially hazardous situation which, if not avoided,
may result in minor to moderate injury or equipment damage.
zExamples of Labels
indicates a forbidden action (that must not be done).
Specific details are given in or near the symbol.
The label on the left indicates that touching is prohibited.
indicates a mandatory action (that must be done).
Specific details are given in or near the symbol.
The label on the left indicates something that must be done.
zPrecautionary Information
Do Not Touch
Do not touch or operate
the product with wet
hands.
Doing so may result in
electric shock.
Do Not Touch
Do not handle batteries
with wet hands.
Doing so may result in
electric shock.
WARNING

5
Mandatory
Handle sample cells
carefully to prevent
them from getting
damaged.
Sample cells are partially
made of glass. Failure to
handle them carefully may
result in injury.
Prohibited
Do not use a power
supply not specified in
this document.
Doing so may damage the
product.
Prohibited
Do not allow water or
chemicals to come in
contact with the
product.
Doing so may result in
electric shock or damage
to the product.
Prohibited
Do not put your fingers
or foreign objects in the
product.
Doing so may result in
injury, electric shock, or
damage to the product.
Prohibited
Do not use the product
near flammable objects.
The product is not
explosion-proof. Doing so
may result in fire or
explosion, which is very
dangerous.
Prohibited
Do not install the
product in locations
with an ambient
temperature outside the
range 5 °C to 40 °C.
Doing so may damage the
product.
Mandatory
If the product becomes
abnormally hot or emits
sound or smoke, stop
using it immediately.
Failure to do so may result
in an accident or injury.
Mandatory
If you hear thunder
during use outdoors,
stop using the product
immediately.
Failure to do so may result
in electric shock or injury.
WARNING

6
Prohibited
Do not let powder or
other reagents get into
your eyes or mouth.
Doing so may cause
physical abnormalities.
Prohibited
Do not use powder or
other reagents for other
applications.
Doing so may result in an
accident.
Note: If these get into your eyes or mouth,
see page 12 for remedies.
Prohibited
Do not swing the
carrying case or
strongly tug the strap.
Doing so may result in an
accident or injury.
Prohibited
Do not leave the
product within reach of
children.
Doing so may result in an
accident or injury.
Do Not
Disassemble
Do not attempt to
disassemble, repair, or
modify the product by
yourself.
Doing so may result not
only in damage to the
product, but also in electric
shock or fire.
WARNING

7
Prohibited
Do not use the product
in environments where
there is condensation
or condensation is likely
to form.
Doing so may damage the
product.
Mandatory
When not using the
product for a long time,
remove the batteries
from the compartment.
Failure to do so may
damage the product.
Prohibited
Do not subject the
product to vibrations or
shocks or drop it.
Doing so may damage the
product.
Prohibited
Do not place any
objects on top of the
product.
Doing so may result in an
accident or damage to the
product.
Prohibited
Do not place the
product in locations that
are subject to direct
sunlight or that reach
high temperatures.
Doing so may damage the
product.
Prohibited
Do not wipe the product
with organic solvents or
chemicals that will
damage its surface.
Doing so may damage the
product.
CAUTION
In addition to the precautions
given here, precautionary
information is provided
throughout this operation manual.
Be sure to read it thoroughly
before using the product.

8
About This Product
This product is an easy-to-use handy water
meter.
The test water is colored with a reagent,
and the concentration of residual chlorine
is measured by the amount of transmitted
light. Being compact and easy to handle,
the AQ-202 makes it suitable for use in
on-site measurement.
For a meter in this class, it employs a large,
easy-to-view, original LCD screen so that
just enough information can be displayed.
In addition, it is provided with handy
functions including a memory function for
saving up to 99 measurement values, a
user two-point calibration function, and an
auto OFF function for automatically turning
the power OFF.
The AQ-202, dedicated to measurement of
residual chlorine (high concentration), can
measure the concentration of residual
chlorine in test water in the range 0 to
300 mg/L.
Names of Parts
zAQUAB Body Front
Cell cover
Display
[MODE] key [ZERO] key
[MEAS.] key
Metal strap attachment
Measurement
chamber
Triangle mark
[ When cell cover is open ]
Easy-to-carry, compact body
Auto OFF function
Carrying case handy for carrying around
User calibration mode
Saves up to 99 measurement values

9
Function of Operation Keys
Name Function
[ZERO] key
When this key is pressed in the measurement mode, zero-point recognition
is started.
In the memory check mode or user calibration mode, it functions as the up
key.
[MEAS.] key
When this key is pressed in the measurement mode, measurement of the
test water is started.
In the memory check mode or user calibration mode, it functions as the
down key.
[MODE] key
When this key is pressed, the mode is changed as shown below.
zPressed in the measurement mode →Memory check mode
zPressed in the memory check mode →Measurement mode
zPressed in the user calibration mode →Measurement mode
Holding this key down for at least 2 seconds enters the mode selection
screen. This key functions as the enter key when selecting a mode, etc.
CLEAR
When the [ZERO] and [MEAS.] keys are held down at the same time for at
least 5 seconds, data is cleared.
zMeasurement mode →Clears the zero-point value.
zMemory check mode →Clears all measurement data.
zUser calibration mode →Clears user-specified conversion equation.
zAQUAB Body Rear and Sample Cell
Battery cover
Cap
Reference
line
Triangle mark
Sample cell
Battery compartment
Connector for calibrations
by the manufacturer
(Note: This connector cannot be
used by customers.)
Battery lock

10
Carrying case
Quick manual
Powder
reagent
zDisplay
No. Name Description
(1) Main display This displays measurement values, various setting values, error
messages, and other information.
(2) Unit display In this water quality photometer, concentration is displayed in terms
of mg/L.
(3) Display in memory
check mode This is displayed and flashes in the memory check mode.
(4) Number of memory
entries and entry No.
In the measurement mode, the memory No. used for saving the
measurement results (the number of saved measurement values) is
displayed (When the number exceeds 99, data is overwritten
starting from "01."). In the memory check mode, the memory No.
displayed is indicated.
(5) Display in
measurement mode This is displayed in the measurement mode.
(6) Display at zero-point
recognition
This is displayed when the zero-point recognition has been
completed.
(7) Display in user
calibration mode
This is displayed when the mode is switched to the user calibration
mode.
(8) Display at user
calibration setting
This is displayed when the concentration conversion equation has
been changed in the user calibration mode.
(9) Display at mode
selection This is displayed when the screen is at mode selection.
(10) Remaining battery
power
The remaining battery power is displayed graphically in three
stages.
zOther
There is sufficient
battery power left.
The remaining battery
power is approximately
50 %.
The batteries have run
out. Replace with new
batteries.

11
Powder Reagents
The powder reagents provided with this product are prepared based on the iodine titration
method, a test method used in the "Standard Methods for Examination of Water" (from JWWA).
When a pack of the powder reagent is added to test water such as hypochlorous acid solution
that contains high-concentration residual chlorine, it is colored to between light yellow and dark
yellow (When measurement is performed on the AQ-202, the concentration of residual chlorine
is displayed.).
zEffect of Coexistent Substances
Coexistent substances contained in test water sometimes affect measurement. If this happens,
compare the results with those obtained by a standard method for examining tap water to
check the measurement values.
Unaffected ions
1000 mg/L or less B3+,Br-,Ca2+,Cl-,K+,Mo6+,Na+,NH4+,NO3-,
PO43-,SO42-
200 mg/L or less Zn2+
100 mg/L or less Mg2+,NO2-
20 mg/L or less F-
1 mg/L or less Cu2+,Fe3+,Mn2+
Ions affected even by small amounts
of coexistent substances Fe2+
zDisposal After Measurement
zPour test water containing the powder reagent into the sewage system together with large
amounts of water. Thoroughly wash the containers used for testing with water.
zIf there is powder reagent remaining in the opened pack, pour it into the sewage system
together with large amounts of water.
zBe sure to take back used packs or other unwanted items, and dispose of each of them by
following the instructions from the relevant local government.
zUse up remaining powder reagents in unopened packs as soon as possible. In particular, if
powder reagent is stored in high-humidity locations during the summer or rainy season, it
might deteriorate in several days. When storing powder reagent, put it in a dry container and
close the container, then store it in a cool, dark place.

12
zIf Powder or Other Reagent Gets on You or Is Swallowed...
Note 1: The above remedies are merely emergency treatment. If abnormalities persist even after these
remedies, immediately consult a physician.
Note 2: Those with allergies or sensitive skin should put on water-impermeable gloves before starting work.
Using the Product
zWorkflow
The main workflow when using this product is as follows.
If it gets into your eyes
Immediately wash with
running water for at least
15 minutes.
If it gets on your skin
Immediately wash the affected
area on your skin thoroughly
with large amounts of water.
If you breathe it in
Go to a location where there is
fresh air, rest, and blow your
nose and gargle with water.
If you swallow it
Drink large amounts of
water and regurgitate it.
Insertion of batteries Sampling of
test water
Zero-point
recognition
Addition
of powder
reagent
Concentration
measurement
Saving of
measurement values
Memory data
transcription

13
zMeasurement Precautions
zTest water (sample)
•Use test water in the range 5 °C to 30 °C. (Note 1)
•When the pH of the test water exceeds the range 3 to 11, neutralize the water with
dilute hydrochloric acid or dilute sodium hydroxide.
•Do not use colored water for test water.
zPowder reagents
•Use powder reagents designated by us.
•Use powder reagents within the expiry date.
•Do not use colored powder reagents even within the expiry date.
•Open powder reagent packs immediately before use.
zAQUAB body
•When performing measurement, set the control panel surface face up and horizontal.
•When inserting the sample cell in the measurement chamber, be sure to align the
triangle marks.
•When performing zero-point recognition or concentration measurement, properly
close the cell cover to prevent light from entering the measurement chamber.
zSample cells
•Take care when handling sample cells to prevent them from becoming scratched.
•Wipe off dirt from sample cells beforehand.
•Use the same sample cell for zero-point calibration and measurement.
•If the outside of a sample cell is wet, thoroughly wipe off moisture on the cell.
•Before storing sample cells, clean them with deionized water after use. (Note 2)
zMeasurement
•When adding powder reagent to the test water to color it, be sure to perform
measurement at the specified time, as color darkens with time.
Note 1: If the temperature of the test water deviates considerably from 20 °C, perform user
calibration. The correct concentration cannot be displayed without performing user
calibration.
Note 2: Residual chlorine remaining in the sample cell might cause measurement error. Thoroughly
clean the cell before storage. If it is difficult to obtain deionized water, clean the cell thoroughly
with tap water before storage, and clean it with test water a few times before measurement.
Be sure to observe the following precautions when performing measurement. Note
that, if these precautions are not followed, correct measurement results will not be
obtained, for example due to measurement error.

14
Mode Selection Screen
Use this mode to measure
concentration.
This mode is used immediately after
the power is turned ON.
User Calibration Mode
Memory Check Mode
Use this mode to check saved
measurement values.
You can also clear data (clear all).
Use this mode to set a user-specified
concentration conversion equation.
Select this screen and determine
the selection to turn OFF the power.
Measurement Mode
zMode Selection
When using this product, select a mode according to the purpose to perform the intended work
procedure.
Select one of the three modes: measurement mode, memory check mode, and user calibration
mode. To change the mode, you can use the mode selection screen or press the [MODE] key.
Changing the Mode on the Mode Selection Screen
Holding down the [MODE] key for at least 2 seconds enters the mode selection screen. To
display the desired mode, select the screen for the mode to use (see the figures below) and
determine the selection*.
To turn OFF the power by manual operation instead of using the auto OFF function, select the
power OFF screen in this process.
Changing the Mode by Pressing the [MODE] Key
Pressing the [MODE] key once can also change the mode. However, patterns to change the mode
are limited in this case.
User Calibration Mode
Measurement Mode
Memory Check Mode
Note: Every time the [MODE] key is pressed, the
mode is changed in the direction of arrows.
* On the mode selection screen, the [ZERO]
key functions as the up key, the [MEAS.] key
functions as the down key, and the [MODE]
key functions as the enter key.

15
zInserting the Batteries
Insert four AAA alkaline batteries into the AQUAB body.
Prepare four fresh AAA alkaline batteries.
Note: The batteries included with the product are only for checking operation.
Orient the rear side of the AQUAB
body toward you.
Slot a coin or similar object into the
groove of the battery lock and turn it
to loosen.
Once it is sufficiently loose, hold the
battery lock and remove the battery
cover.
Fit the four AAA alkaline batteries
you have prepared into the battery
compartment, making sure that their
polarities are facing the correct way.
Close the battery cover, and slot a coin or similar object into the groove of the battery
lock and tighten it to lock. This completes insertion of the batteries.

16
[ How to open the cell cover ]
Align the
triangle marks.
Display example
zMeasurement
This section describes measurement procedures. Before starting measurement, be sure to
thoroughly read "Safety Precautions" and "Measurement Precautions."
Turning the Power ON
With the display OFF, press any key
to turn the instrument ON.
The measurement mode is used
immediately after the power is
turned ON.
Note: If the previous zero-point recognition value
is saved, "ZERO" is displayed on the screen.
If a measurement value is already saved or
user calibration setting has been configured,
indication for them is displayed.
Zero-Point Recognition
Sample 10 mL of test water in the sample cell (up to its reference line) and close the cap.
Quickly wipe off any dirt or water droplets on the sample cell with clean laboratory
paper, for example.
Note: If the sample cell is wiped with dirty paper, the dirt from that paper will transfer to the sample cell.
Be sure to use clean paper.
Open the cell cover, and load the
sample cell in the measurement
chamber. At this time, be sure to
align the triangle marks on the
sample cell and measurement
chamber.

17
[ How to close the cell cover ] Sample cell
Align the
triangle marks.
Close the cell cover, and press the
[ZERO] key.
After zero-point recognition for 2
seconds, "000 mg/L" and "ZERO"
are displayed.
This completes "zero-point
recognition."
Concentration Measurement
When zero-point recognition is
completed, remove the sample cell from
the measurement chamber. Add the
provided powder reagent to the test
water inside the sample cell, close the
cap, and shake the cell thoroughly so
that the reagent is dissolved completely.
Note: Concentration cannot be measured if zero-point
recognition is not completed. Be sure to finish
zero-point recognition before measurement.
Quickly wipe off any dirt or water droplets on the sample cell with clean laboratory
paper, for example.
Note: If the sample cell is wiped with dirty paper, the dirt from that paper will transfer to the sample cell.
Be sure to use clean paper.
After the test water has reacted with
the powder reagent, insert the
sample cell into the measurement
chamber. At this time, be sure to
align the triangle marks on the
sample cell and measurement
chamber.

18
Display example
Mode Selection Screen
Close the cell cover, and press the [MEAS.] key.
(Press the [MEAS.] key within 10 seconds of pouring the powder reagent into the
sample cell.)
After concentration measurement
for 2 seconds, the resulting
concentration value is displayed.
Note: Measurement values are automatically saved
to the memory No. displayed. When 99
values are saved, following values are saved
by overwriting the oldest values.
Measurement values are not saved correctly
if the power is turned OFF by means other
than powering OFF from the mode selection
or the auto OFF function.
If the auto OFF function is activated during measurement and the display disappears,
press any key to restore it. (The previously recognized zero point is saved.)
Turning the Power OFF
When work is finished, you can turn
OFF the power by selecting the
power OFF screen at mode
selection. (see page 14.)
Note: The power goes OFF automatically
120 seconds after the last operation
due to the auto OFF function.

19
Display example
Saved measurement value
Memory No.
Saved measurement value
Memory No.
Display example
Mode Selection Screen
zMemory Check Mode
Up to 99 measurement values can be saved on this water quality photometer. To check saved
measurement values (memory check) or clear all saved measurement values (memory clear),
switch to the memory check mode and perform the desired operation.
Transcript measurement data on a regular basis to be prepared
for incorrect operations, malfunctions, and accidents.
If you fail to do so, measurement data may not be obtained.
Please be aware that in the rare event of product failure, Sibata bears no
responsibility to compensate for unrecorded measurement data, and is not
responsible for loss of data or for other direct or indirect damages incurred from
such loss.
Note: In the memory check mode, the auto OFF function is disabled. When operation is finished, be sure to
return to the measurement mode.
Memory Check
Change the mode to the memory
check mode by mode selection.
(see page 14.)
Note 1: In the measurement mode, pressing
the [MODE] key starts the memory
check mode.
Note 2: In the memory check mode, the
"MEMORY" indication keeps flashing.
Using the [ZERO] and [MEAS.]
keys, display the memory No. to
be called up.
The measurement value
corresponding to that memory No.
can be checked in the main
display.
Note: In the memory check mode, the
[ZERO] key functions as the up
key, the [MEAS.] key functions
as the down key. Holding down
either of the keys changes the
memory No. in increments of 10.
After checking the saved measurement values, press the [MODE] key to return to
the measurement mode.

20
-During memory clear -
-Memory clear completed -
Display
example
Mode Selection Screen
Memory Clear
Before clearing the memory, confirm that it will not cause any
problems.
Memory clear means cleaning all measurement data saved in the product.
Once the memory is cleared, the data cannot be restored. Before clearing the
memory, thoroughly confirm that it will not cause any problems.
Change the mode to the memory
check mode by mode selection.
(see page 14.)
Note 1: In the measurement mode, pressing the
[MODE] key starts the memory check
mode.
Note 2: In the memory check mode, the
"MEMORY" indication keeps flashing.
Hold down the [ZERO] and [MEAS.]
keys at the same time for at least 5
seconds. "CLr" appears on the main
display and starts flashing. When
the main display changes to "---,"
this indicates that memory has been
cleared.
Releasing your finger from the key
while "CLr" is displayed cancels the
memory clear.
When the memory has been cleared, press the [MODE] key to return to the
measurement mode.