ATAGO PAL-Easy ACID15 Instruction Manual

7315-E04
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Pocket Acidity Meter (Mango)
Master Kit
PAL-Easy ACID15
Cat. No. 7315

Parts

LCD
Displays the measured values,
sensor temperature, and battery
indicator.
The instrument will turn itself off
after 2 minutes of inactivity.
To manually turn it off, hold down
the START button for more than
2 seconds.
START Button
Press to take measurement.
To turn off the display, press and
hold for more than 2 seconds.
R Button
Press to restore default settings
for the Offset Feature.
Battery Compartment
Place and remove batteries from
here.
Contents
Main unit...1 Inspection Certificate...1 AAA batteries...2 Measuring Spoon 1mL...1 Beaker 100mL...1
Digital scale...1（CAbout the Digital Scale）
mPlease remove the tape in the battery compartment before first use.
cThe measuring spoon is available from ATAGO.
Part No. RE-39005 Measuring Spoon 1mL
ATAGO instruments are rigorously inspected to ensure each unit meets the highest standards of quality assurance.
Instrument
The instrument measures the acidity (%) in the 1:50 dilution of a sample that is diluted with distilled, purified,
or deionized water.
The measurement value is the acidity (%) of the undiluted sample (stock-solution).
Sample Preparation Tips
・Sample dilution
Any amount of sample can be made as long as the dilution ratio is 1:50. We recommend 1.00g of sample to
keep accuracy consistent.
<example>
Sample Purified water
1.10 55.00
Sample 1.10g Add purified water until the
total weight is 55.00g.
Measurement Value
This unit measures and determines the acidity through electrical conductivity.
Citric acid is the primary acid found in Mango.
The instrument measures the total acidity in a sample and converts it into citric acid concentrations.
Automatic Temperature Compensation
The Automatic Temperature Compensation (ATC) feature is based on temperature detected by the thermo sensor located
near the sensor area.
ATC may not work correctly when the temperature of the sensor area is not the same as the actual temperature of the
sample. When measuring a hot or cold sample, let it sit on the sensor for approximately 20 seconds and measure, or take
multiple readings until measurements become stable.
Preparation
Zero-setting
1. 2.
Clean the sensor
with water. (with nothing on the sensor).
Dry the area with
QR code tissues thoroughly.
R
Instruction Manual
Measurement

[1]Dilution

CAbout the Digital Scale
cNecessary Materials : Digital scale, Beaker 100mL
1. 2.
Sample Stage Press the
POWER Button. the scale and zero set
Place sample on the sensor
(tare).
located at the center of the
（Press the Zero-set
sample stage.
button (tare)）
ZERO Button
Press to perform zero-setting.
Press and hold to setup the offset
feature.
0.00

[2]Measuring the Acidity

1.
Lanyard Hole Apply some diluted sample.
At least 0.6mL

Cleaning

・Wipe off the sample. Clean the sensor with water.
Dry the area with tissues thoroughly.
・Clean oily residues with mild soap, and then, rinse with water.
mHandle the sensor with care so as not to scratch it.
Addendum
Measuring Without using a Scale
[1]Dilution
cNecessary Materials : Measuring spoon 1mL, Beaker 100mL
1.
Using the attahced measuring spoon,
place a level spoonful (1mL) of sample in
the attached beaker.
When there is any doubt regarding accuracy of measurement results, adjust the reference value according to the following procedure.
cThe reference solution is available from ATAGO.

Checking with Reference Solution

1. 2.
Clean the Press the ZERO
sensor with button (with nothing
water. on the sensor) to
Dry the area zero-set.
with tissues
thoroughly.
"000" will appear.
(Press the
START button
to turn on the
instrument.)

Calibration

6.
Apply the reference solution.
Turn on the instrument.
Press the START and ZERO
buttons simultaneously.

Zero-setting and Measurement

mRecommended on a daily basis.
3.
Press the START button "000" will appear.
Measurement: not 0.00
－Zero-setting is required.－
Press the ZERO button
(with nothing on the
Flash
sensor).
Measurement: 0.00
20.4 ℃
Proceed to Measurement
0.0 0
3. 4.
Place the beaker on Pour 1.00g of sample into Add purified water
the beaker. until the total weight is
cAny amount of sample 50.00g.
can be made as long as the
dilution ration is 1:50. We
Purified water
recommend 1.00g of sample
to keep accuracy consistent.
Sample
T
0.00
50.00
1.00
2.
Press the Measurement is displayed after "---."
START button. The unit of Acid is %.
20.4 ℃
0.2 5
cThe measurement is the value of the sample
(stock-solution).
For approximate measurement only
2. 3.
Add purified water Gently stir.
to the beaker until the
total amout is 50mL.
Proceed to
Sample
[2]Measuring
1ｍL 50ｍL
the Acidity
Checking with Reference Solution
Part No. RE-130004 Reference solution (0.04% Citric acid solution)
3. 4. 5.
Apply the reference Press the
solution. START button
Measurement: not 2.09 (±0.21) Acid
*Reference solution
Calibration is required.
(0.04% (g/100g) Citric
acid solution)
Measurement: 2.09 (±0.21) Acid
The instrument
20.4 ℃
is calibrated
000
correctly.
At least 0.6mL
Flash Light up
"CCC"
20.4 ℃
will appear.
CCC
Flash Light up

Discrepancies with titration

Due to the difference in measurement principles, readings
from the instrument may not match up exactly with the
readings by titration for certain samples. However,
correlation between the two testing methods can be seen.
20.4 ℃ Offset feature use
0 0 0 Create a conversion chart between the two testing methods.
Light up
For addition/subtraction (b) [Range: -5.00 to 5.00]
1. 3.
2.
Hold down Press START
Press ZERO to
ZERO while it is select either to confirm.
turned on. addition (+) or
(While the measured subtraction (-).
value is displayed)
Addition/subtraction
"b" will appear (b) will appear.
For addition, only "b"
will appear.
-b -b
5.
Gently stir.
No plus sign will be
displayed.
For coefficient (a) [Range: 0.50 to 5.00]
6. 7.
Enter the coefficient. Press
START to
a
confirm the
1.0 0
coefficient.
The 3rd digit: 0 to 9
The 2nd digit: 0 to 9
The 1st digit: 0 to 5
"End" will appear.
START to confirm ZERO to change E n d
and move to the the number.
next digit.
・The measurement range is shifted according to the offset settings.
・Screen images when offset is on.
During measurement After zero-setting with air
20.4 ℃
<example>
- - - 0.3 0
Offset "b" = addition of 0.30
The following messages alert the user when an operation has failed.
Lo ・The battery is low.
A A A Acid
・The sensor was not empty when zero-setting
was attempted.
・Calibration was attempted with something other
than the calibration solution.
Measurement range
Resolution
Measurement accuracy
Measurement time
Backlight
20.4 ℃
Output
2.09
Output category
Acidity scale
Automatic temperature compensation range
Ambient temperature range
International Protection class
Power supply
Dimensions and Weight

Acid: Offset Function

An example of conversion chart
ｙ = a x + b
0.8
0.7
ｙ：titration readings
x：The instrument readings
0.6
a：coefficient (multiplication)
0.5
b：addition/subtraction number
0.4
0.35 0.45 0.55 0.65 0.75
（ⅹ）
4. 5.
Enter the addition/subtraction
Press START
number. to confirm the
addition/subtrac
-b
0.0 0 tion number.
The 3rd digit: 0 to 9
The 2nd digit: 0 to 9
The 1st digit: 0 to 5
a
1.0 0
-b
0.0 0
START to confirm ZERO to change
and move to the the number.
next digit.
For default
Press the R button while setting up the
Off-Set feature.
Factory default value
b
Addition/subtraction
0.0 0
(b) 0.00
a
Coefficient
1.0 0
(a) 1.00
E n d

Error Messages

L L L Temperature
・The sensor temperature is below the temperature
range.
H H H Acid
・The sample measured outside the measurement range.
Temperature
・The sensor temperature is above the temperature
range.
Specifications
Acid 0.10 to 4.00% 10.0 to 40.0℃
Acid 0.01% 0.1℃
Acid ±0.10% (0.10 to 1.00%) Relative precision ±10% (1.01% or more)
±1℃
Approx. 2 seconds
The backlight stays on for 30 seconds after any button is pressed.
NFC Forum Type 4 Tag ISO/IEC 14443 Type A
Date Time, Acidity [%], Temp [degC]
(e.g.) 2019/01/17 09:30:45, 0.24 21.3
10 to 40℃
10 to 40℃
IP65
Two (2) AAA alkaline batteries
55(W)×31(D)×109(H)mm , 100g (main unit only)
2306K Printed in Japan