AMTAST AMT27 User manual

AMTAST
AMT27 Portable Turbidimeter
Instruction Manual
AMTAST USA INC

1 Contents
Table of Contents
Introduction ……………………………………………………………………………………………………………………………………..……. 2
Unpacking ……………………………………………………………………………………………………………………………………..……...... 2
Operating principles …………………………………………………………………………………………………………………………………… 2
Meter overview ………………………………………………………………………………………………………………………………………… 3
Keypad ……………………………………………………………………………………………………………………………………..…………... 3
Display ……………………………………………………………………………………………………………………………………..…………... 4
Installing the batteries ……………………………………………………………………………………………………………………………….. 4
Switching the meter on and off ……………………………………………………………………………………………………………………… 5
Setup menu ……………………………………………………………………………………………………………………………………..……. 5
Setting the default option ……………………………………………………………………………………………………………………………. 6
Setting the date and time ……………………………………………………………………………………………………………………………. 6
Restore factory settings ……………………………………………………………………………………………………………………………… 6
Measurement and calibration hints ……………………………………………………………………………………………………………. 7
Turbidity calibration ……………………………………………………………………………………………………………………………….. 7
Setting the number of calibration points …………………………………………………………………………………………………………… 7
Calibrating the meter …………………………………………………………………………………………………………………………………. 8
Turbidity measurement ……………………………………………………………………………………………………………………………. 8
Selecting the measurement mode …………………………………………………………………………………………………………………... 8
Single measurement - low turbidity samples (< 200 NTU) ……………………………………………………………………………………….. 9
Single measurement - high turbidity samples (>1100 NTU) ………………………………………………………………………………….…… 9
Continuous measurements …………………………………………………………………………………………………………………………… 9
Data management ………………………………………………………………………………………………………………………………….. 10
Storing a measurement result ……………………………………………………………………………………………………………………….. 10
Viewing the data log ……………………………………………………………………………………………………………………………..…… 10
Deleting the data log …………………………………..…………………………………………………………………………………………..…. 10
Communication ……………………………………………………………………………………………………………………………………… 11
Receiving the data …………………………………….…….……………………………………………………………………………………..…. 11
Create the Excel file ………………………………………………………………………………………………………………………………….. 11
Appendix ……………………………………………………………………………………………………………………………………..…….... 12
Indexing a sample vial ……………….………………………………………………………………………………………………………………. 12
Matching the sample vials …………………………………………………………………………………………………………………………... 12
Preparing the formazin standards …………………………………………………………………………………………………………………… 12
Specifications ……………………………………………………………………………………………………………………………………..….. 13
Optional accessories …………………………………………………………………………………………………………………………………. 13

2 Overview
Introduction
Thank you for selecting the AMT27 portable turbidity meter. This manual provides a step-by-step guide to help you operate the meter, please
carefully read the following instructions before use.
Unpacking
Before unpacking, ensure that the current work environment meets the following conditions.
•Relative humidity is less than 80%.
•Ambient temperature is greater than 0° C/32° F and less than 50° C/122° F.
•No potential magnetic fields and ambient light interference.
The following list describes the standard components of meter. After the unpacking, please check all components are complete. If any are
damaged or missing, please contact the supplier.
The sample vial in the measurement chamber has been indexed with the 0.02 and 10 NTU standards at the factory.
Operating principles
The AMT27 portable turbiditymeter operates on the nephelometric principle of turbidity measurement and is designed to meet the criteria specified
in ISO 7027. The following figure shows the basic optical system of meter. It includes a light source and a detector to monitor the light scattered
at 90° with respect to the incident beam.
1. AMT27 turbidity meter 3. Lint-free cloth
2. Calibration standards 4. Sample vials
Detector
IR LED
Emitted light 90° scattered light
Sample
AMTAST

3 Overview
Meter Overview
Keypad
Name and Icon Function
• Switches the meter On/Off.
• Press the key to take a measurement.
• Exits the calibration or setting and returns to the measurement mode.
• Starts calibration.
• Enters the setup menu (Press and hold the key for 3 seconds).
• Stores current reading to memory.
• Increase value or scroll up through the menu item.
• Views the data log.
• Decrease value or scroll down through the menu item.
• Confirms the calibration, settings or displayed options.
Display
Measurement chamber
USB interface
Measurement module
Battery compartment

4 Overview
Display
Low battery alarm:
When the battery is depleted, the icon will disappear.
Setting mode icon:
Indicates the meter is in the setting mode.
Measurement mode icon:
Indicates the meter is in the measurement mode.
Data log icon:
Indicates the data is stored into memory.
Calibration mode icon:
Indicates the meter is in the calibration mode.
Calibration icon:
Indicates the meter is calibrating.
Installing the Batteries
1. Remove the battery compartment cover from the backside of meter.
2. Insert the three AA batteries into the battery compartment, note polarity.
3. Replace the battery compartment cover to its original position. Push the stopper until locked.
If the batteries are depleted, the meter allows using the DC5V power adapter or the USB port on computer as a temporary power supply.
Note, take out the batteries, Adapter not include.
Push

5 Setup Menu
Switching the Meter On and Off
• Press and release the key to switch on the meter.
• Press and hold the key for 3 seconds to switch off the meter.
Setup Menu
The AMT27 portable turbidity meter contains an integrated setup menu that is used to customize the displayed option to meet measurement
requirement. The following table describes the functions of each menu item.
Menu Description Options Description Default
Set the number of calibration points 2 to 5 points 2
Set the date and time --- Year, month, day, hour, minute ---
Set the default turbidity unit
NTU Nephelometric turbidity unit
NTU
FNU Formazin nephelometric unit
EBC Turbidity unit of the European Brewery Commission
ASBC Turbidity unit of the American Society of Brewing Chemists
Set the resolution of measurement 0.01 0.01
0.1
Set the measurement mode Single measurement Yes
Continuous measurements
Auto-power off Enable No
Disable
Clear all data logs Enable No
Disable
Reset the meter to default settings Enable No
Disable
Setting the default option
1.1 Press and hold the key for 3 seconds to enter the setup menu.
1.2 Press the ◄/ ►key to select a menu item, press the Enter key to confirm.
1.3 Press the ◄/ ►key to select a desired option, press the Enter key to confirm and return to the measurement mode.

3 sec.

6 Setup Menu
Setting the date and time
2.1 Press and hold the key for 3 seconds to enter the setup menu.
2.2 Press the ►key, the display shows / (Date/Page 2).
2.3 Press the Enter key, the characters begin flashing.
2.4 Press the ◄/ ►key to set the year and the Enter key to confirm.
2.5 Repeat the step 2.4 to set the date and time. When the setting is completed, the meter will return to the measurement mode automatically.
Restore factory settings
The Factory Reset option is used to restore the meter back to default settings. If enabled, all of the calibration data and selected options will be
lost or reset, the meter must be recalibrated.
3.1 Press and hold the key for 3 seconds to enter the setup menu.
3.2 Press the ◄key, the display shows / (Reset/Page 8).
3.3 Press the Enter key, the display shows / indicating that do not reset the meter.
3.4 Press the ►key to select / , press the Enter key to confirm.
Exit the settings
To exit the setup menu without saving changes, press the Meas key.
Menu item
Page number
Option
Menu item
Month - Day
Hour - Minute
Year

7 Measurement and Calibration
Measurement and Calibration Hints
•Do not hold the meter in the hand during the measurement and calibration.
•Ensure that the sample in vial is homogeneous and preventing air bubbles.
•Before starting the measurement, the outside of vial must be clean and dry. Wipe the vial with a lint-free cloth to remove fingerprints and
waterdrops.
•If the vial has minor scratches or scuffs, add a few drops of silicone oil to outside of the vial. Wipe with lint-free cloth.
•Ensure that the vial is positioned in the measurement chamber, the mark on the vial must be aligned with the arrow on the meter.
•To prevent the errors from ambient light interference, do not use the meter in direct sunlight. Always close the light shield lid during the.
measurement and calibration.
•The vial and cap must be cleaned thoroughly with deionised water after each measurement. Any residues can cause inaccurate readings.
Turbidity Calibration
•The AMT27 portable turbidity meter is calibrated with Formazin Standards atthe factory and does not require user calibration prior to use.
•Do not shake or agitate the calibration standard violently to prevent air bubbles.
•
•
The meter allows turbidity calibration up to 5 points with minimum of 2 points, the default calibration points include the 0.02, 10.00, 200,
500 and 1000 NTU. For better accuracy, ensure that selecting a calibration point close to the sample value you are measuring. Standard
Setting the number of calibration points
1.1 Press and hold the key for 3 seconds to enter the setup menu, the display shows / .
1.2 Press the Enter key, the display shows / (2 points calibration).
1.3 Press the ◄/ ►key to select the number of calibration points, press the Enter key to confirm.
Arrow
Mark

3 sec.
packing without 10NTU calibration solution. User can make it, see page 12.,

8 Measurement and Calibration
Calibrating the meter
2.1 Press the Cal key to enter the calibration mode, the display shows NTU/ . If necessary, press the ◄/ ►key to select a
calibration point close to the sample value you are measuring.
2.2 Take out the corresponding calibration standard from carrying case. Wipe the vial with a lint-free cloth to remove fingerprints.
2.3 Hold the vial cap and gently inverting vial several times. Ensure that the calibration standard is homogeneous and no air bubbles.
2.4 Insert the calibration standard into the measurement chamber, the mark on the vial cap aligns with the arrow on the meter. Close the light
shield lid.
2.5 Press the Enter key, the meter begins the calibration. The Calibration icon continuously flashing.
2.6 Wait for the reading to stabilize, the meter automatically shows the next calibration point.
2.7 If necessary, press the ►key to select an applicable calibration point.
2.8 Repeat steps 2.2 through 2.5 until the meter shows . Calibration is completed.
To exit the calibration mode without saving the calibration, press the Meas key.
Turbidity Measurement
Selecting the measurement mode
The AMT27 portable turbidity meter contains twomeasurement modes. If the single measurement mode is enabled, the meter will automatically
recognize a stable reading and lock the measurement. If the continuous measurement mode is enabled, the meter will continuously updating the
measured values. To set this option follow the steps below.
1. Press and hold the key for 3 seconds to enter the setup menu.
2. Press the ►key until the display shows / (Hold/Page 5).
3. Press the Enter key, the display shows / indicating that the single measurement mode is selected.
4. Press the ►key, the display shows / indicating that the continuous measurement mode is selected.
5. Select one of the above options, press the Enter key to confirm.
Arrow

9 Measurement and Calibration
Measurement
An accurate turbidity measurement depends on good measurement techniques. Factors such as clean sample vials, positioning of vial in the
measurement chamber, covering the vial with the light shield lid, meter calibration, removal of bubbles, etc. For more information, please refer to
page 7 “Measurement and Calibration Hints”.
Single measurement - low turbidity samples (< 200 NTU)
For the low turbidity samples, we recommend using the same vial to perform the measurement and calibration.
1.1. Rinse the vial with approximately 10ml of the sample, capping the vial with the screw cap and gently inverting it several times. Discard
the used sample and repeat the rinsing procedure two more times.
1.2. Fill the vial with the sample. Cap the vial.
1.3 Wipe the vial with the lint-free cloth to remove waterdrops and fingerprints. Ensure that the outside of vial is dry and clean.
1.4 Place the vial in the measurement chamber. Align the mark on the vial with the arrow on the meter.
1.5 Close the light shield lid. Press the Meas key, the Measure icon begins flashing.
1.6 Wait for the reading to stabilize, the Measure icon will stop flashing.
Press the Meas key, the meter will take a measurement again.
Single measurement - high turbidity samples (>1100 NTU)
For the high turbidity samples, the solution must be diluted prior to measurement. The dilution water can be obtained by filtering deionized water
through a < 0.45µ m filter membrane.
2.1 Repeat steps 1.1 through 1.5 above and record the measured value.
2.2 Calculate the true turbidity of the original sample using the following formula.
T =
Continuous measurements
3.1 Ensure that the meter is in the continuous measurement mode (Refer to page 8 “Selecting the measurement mode”).
3.2 Fill the vial with the sample. Cap the vial.
3.3 Gently invert the vial several times to mix the sample.
3.4 Wipe the vial with the lint-free cloth to remove waterdrops and fingerprints.
3.5 Place the vial in the measurement chamber. Align the mark on the vial with the arrow on the meter.
3.6 Close the light shield lid. Press the Meas key, the Measure icon begins flashing, the meter continuously measures the sample.
To stop the measurement, press the Meas key again.
Td(Vs+ Vd)
Vs
Where: T= Ture turbidity of the original sample
Td= Measured value
Vs= Volume of the original sample (ml)
Vd= Volume of the dilution water (ml)

10 Data Management
Data Management
The AMT27 portable turbidity meter is capable of storing and recalling up to 100 data sets.
Storing a measurement result
In the measurement process, press the MI key to store the reading into the memory, the Memory icon appears on the display.
Viewing the data log
1. Press the MR key in the measurement mode, the meter shows the serial number of stored data (e.g. LOC/1).
2. Press the ►key, the display shows the date and time of measurement (Format: mm-dd, hh-mm).
3. Press the ►key, the display shows the stored data.
4. Press the ►key again, the display shows the next data set.
5. Press the Meas key, the meter returns to the measurement mode.
Deleting the data log
If the memory is full, the meter will automatically show when the MI key is pressed. To delete data logs, please follow the steps below.
1. Press and hold the key for 3 seconds to enter the setup menu.
2. Press the ◄key until the display shows / .
3. Press the Enter key, the display shows / .
4. Press the ◄key to select the / .
5. Press the Enter key to confirm.

11 Communication
Communication
The AMT27 portable turbidity meter is capable of transfering the data tocomputer or importing the data to Excel by a DAS software. You are able
to download this software from our official website. Before installation, ensure that Windows 7/8/10 operating system has been installed on
your computer.
Receiving the data
1. Connect the USB cable to meter and computer. Click the DAS icon, the system will automatically scan an available communication port
and show the message box “Found a port on your computer”.
2. Click the OK button, the application starts.
If your computer can not find a communication port, please click the file “CP210xVCPInstaller_x64.exe”or “CP210xVCPInstaller_x86.exe”
to update the drive program.
3. Click the Connect button, the screen shows “Port is connected” indicating that the communication between the meter and the computer
has been established.
4. Click the OK button to confirm.
5. Click the Receive button, the stored data automatically transfer to computer.
Create the Excel file
When the transfer is completed, click the Save as Excel, the measured values in the data sheet will automatically convert to Excel file.
WARNING: once the software is closed, all received data will be lost and can not be recovered.
Download at www.amtast.com/soft/amt27.rar

12 Appendix
Appendix
Indexing a sample vial
The United States Environmental Protection Agency (U.S. EPA) recommends that the vial used for turbidity calibration or sample measurement be
indexed. Its purpose is obtain a position which provides the lowest turbidity reading. The indexing methods are as follows.
1.1 Fill the vial using the distilled water (< 0.5 NTU). Cap the vial.
1.2 Wipe the vial with the lint-free cloth to remove waterdrops and fingerprints.
1.3 Place the vial in the measurement chamber. Align the mark on the vial with the arrow on the meter.
1.4 Press the Meas key, the meter begins the measurement.
1.5 Slowly rotate the vial approximately 45 degrees. Close the light shield lid and record the measured value.
1.6 Repeat the step 1.5 until the lowest turbidity reading is shown.
1.7 Mark this position on the vial.
Matching the sample vials
For the best accuracy and repeatability, using one indexed vial is best choice for turbidity measurement. If you need to use a few vials, match
these vials are necessary.
2.1 Repeat the steps above for each vial and record the measured values.
2.2 Find the closest position of these vials measuring value and mark it.
Preparing the formazin standards
Preparation of turbidity-free water:
The turbidity-free water is used for preparation of turbidity standards and is prepared by filtering deionized water through a 0.45µ m or smaller
pore-sized membrane.
Preparation of turbidity standards:
Turbidity Standard Preparation Method
4000 NTU
•Dissolve 1g hydrazine sulfate [(NH2)2•H2SO4] in the turbidity-free water and dilute to 100ml in a volumetric flask.
•Dissolve 10g hexamethylenetetramine [(CH2)6N4] in the turbidity-free water and dilute to 100ml in a volumetric.
flask.
•Mix 5ml of hydrazine sulfate and 5ml of hexamethylenetetramine solutions in a 100ml volumetric flask and let.
stand 24 hours at 25(± 3)° C.
1000 NTU Mix 25ml of 4000 NTU standard in a 100ml volumetric flask and dilute to the mark.
500 NTU Mix 12.5ml of 4000 NTU standard in a 100ml volumetric flask and dilute to the mark.
200 NTU •Mix 10ml of 4000 NTU standard in a 100ml volumetric flask and dilute to the mark.
•Mix 50ml of above standard in a 100ml volumetric flask and dilute to the mark.
10 NTU
•Mix 10ml of 4000 NTU standard in a 100ml volumetric flask and dilute to the mark.
•Mix 2.5ml of above standard in a 100ml volumetric flask and dilute to the mark.
Or, mix 2ml of 500 NTU standard in a 100ml volumetric flask and dilute to the mark.

13 Specifications
Specifications
Model AMT27
Measurement Method ISO 7027 nephelometric method (90° )
Range 0~1100 NTU/FNU, 0 ~275 EBC, 0~9999 ASBC
Resolution 0.01 (0~100 NTU), 0.1 (100~999 NTU), 1 (999 ~1100 NTU)
Accuracy ± 2% (0~500 NTU), ± 3% (501 ~1100 NTU)
Calibration Standards 0.02, 10.00(not include), 200, 500, 1000 NTU
Light Source Infrared-emitting diode
Detector Silicon photodiode
Stray Light < 0.02 NTU
Sample Vial 60(H) × 25(Dia) mm
Memory Stores up to 100 data sets
Output USB communication interface
Display Segmented LCD, 60 (L) × 40(W) mm
Operating Temperature 0~50° C, 32 ~122°F
Power Requirements 3 × 1.5V AA alkaline batteries or DC5V power adapter
Dimensions 180(L) × 85(W) × 70(H) mm
Weight 300g
Optional Accessories
Order Code Description
TB-GV Sample vial, glass body, 60(H) × 25(Dia) mm
USB-AC USB cable, 1 meter, USB-A plug
DCPA-5V DC5V power adapter, 1 meter cable, european standard plug

Hazardous Substance Statement
AMTAST USA is committed to the reduction and eventual elimination of all hazardous substances in both the manufacturing process and finished products we
supply. We have an active manufacturing and procurement program to minimize and eliminate the use of harmful heavy metals such as cadmium, lead, mercury
and the like. New technologies and design parameters are also promoting these efforts and we expect to have little or no such materials in our product in the
coming years. We welcome our customer suggestions on how to speed up these efforts.
Warranty
The warranty period for meter is one year from the date of shipment. Above warranty does not cover the calibration standards. Out of warranty products will
be repaired on a charged basis. The warranty on your meter shall not apply to defects resulting from:
●Improper or inadequate maintenance by customer.
●Unauthorized modification or misuse.
●Operation outside of the environment specifications of the products.
For more information, please contact the nearest authorized distributor.
AMTAST USA INC
E-mail: [e-mail]
438 Skyline Dr. E Lakeland FL. 33809 USA
Website: www.amtast.com
The information in this document is subject to change without notice.