TN100 PortableTurbidity Meter
Instruction Manual.
Table of Contents
1. Overview --------------------------------------------------------------------------------------
2. Technical Specifications --------------------------------------------------------------
3. Instrument Description ----------------------------------------------------------------
3.1 Instrument Overview ---------------------------------------------------------------------
3.2 Meter and Accessories --------------------------------------------------------------
3.3 Display-----------------------------------------------------------------------------------
3.4 Keypad ----------------------------------------------------------------------------------
3.5 Battery Installation----------------------------------------------------------------------
4. Meter Calibration -----------------------------------------------------------------------
4.1 Calibration Standards--------------------------------------------------------------
1
2
3
3
4
5
5
6
6
6
4.2 Calibration Procedure------------------------------------------------------------------
4.3 Calibration Notes --------------------------------------------------------------------------
5. Turbidity Measurement---------------------------------------------------------------------
5.1 Sample Vial Handling------------------------------------------------------------------
5.2 Measurement Preparation ----------------------------------------------------------
5.3 For Single-Shot Measurement---------------------------------------------------------
5.4 For Continuous Measurement----------------------------------------------------------
5.5 Measurement Notes----------------------------------------------------------------------
6. Warranty--------------------------------------------------------------------------------------
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1. Overview：
Thank you for selecting our portable TN100 turbidity meter.
This meter is perfect combination of the most advanced electronic technology and software
design, and is the most cost-effective handheld turbidity meter. This meter operates on the
nephelometric principle of turbidity measurement and is designed to meet the criteria
specified in ISO7027 and DIN 27027 standards. TN100 allows you to measure turbidity of
an aqueous sample both in laboratory and in the field.
With built-in microprocessor chips, beautiful appearance, easy to use, the meter has the
following marked characteristics:
z Intelligent functions, such as automatic calibration, operation directive, automatic
power-off and low voltage display etc.
z Large TFT color screen, showing blue background in measuring mode, green
background in calibration mode and text and graphics in operation directive.
z With advanced digital processing technology, the accuracy of the meter is greatly
improved.
z The meter structure design meets the requirements of IP67sealing level and is suitable
for use in field and on-site.
z With customized carrying case, containing calibration standards, sample vials and other
necessary accessories which are more convenient to use and carry.
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2. Technical Specifications
2.1 Technical Parameters
Measuring Method
ISO 7027 compliant nephelometric Method（90°）
0 ~ 1000 NTU, automatic range selection:
Measuring Range
0.01~19.99 NTU
20.0~99.9 NTU
100~1000 NTU
Resolution 0.01 / 0.1 / 1 NTU
Indication Error ≤ ±2 % of reading±stray light
Repeatability ≤ ± 1% of reading or 0.02 NTU, subject to whichever is greater
Calibration Standards 0.02 NTU, 20.0 NTU , 100 NTU, 800 NTU(Polymer)
Light Source
Infrared-emitting diode（850nm wavelength）
Detector Silicon photovoltaic
Display TFT Color screen
Sample Vials Φ25×60 mm, high borosilicate glass with screw cap
Sample Volume 18 ml
Operating Temp.
Range
0~50℃（32 ~122℉℉）
2.2 Others
Power Supply 4x “AA” Alkaline Batteries
IP Rating IP67
Meter：(90×203×80)mm / 385 g
Dimension/Weight
Quality and Safety
Certificate
Carrying case：(310×295×110)mm / 1.5 kg
ISO9001:2008 & CE
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3. Instrument Description
3.1 Instrument Overview
① Housing ⑥ Sample well
Flip cover of the sample well（Close the
②
cover when measuring）
③ Display ⑧
④ Keypad ⑨ Battery cover
Diagram-1
⑦ Calibration vials or sample vials
Positioning mark (Align the mark with
the mark on the calibration vial or the
sample vial)
Dust proof plug（Take off the plug when
⑤
measuring）
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3.2 Meter and Accessories
Standard solution： 0.02NTU, 20.0NTU,
①
100NTU, 800 NTU
② Carrying case ⑦ Sample vial×3
③ TN100 Meter ⑧
④ Soft cloth ⑨ Instruction manual
⑤ “AA” Alkaline battery×4
Diagram-2
⑥ Silicon oil（10 ml）
Screwdriver（to remove battery
cover）
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3.3 Display
Measuring Mode
① — Measuring indication icon
② — Measured value/Unit
③ — Progress bar
④ — Operation directive
⑤ — Low battery indicator
Calibration Mode
① — Calibration indication icon
② — Measured value/Unit
③ — Progress bar
④ — Operation directive
Calibration Menu Mode
3.4 Keypad
① — Calibration indication Icon
② — Standard solution value
③ — Operation directive
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Diagram- 3
Key Functions
z Power on/off
z The meter will automatically shut off 10 mins after last key press
z Initiate /Exit the calibration mode
z In measuring mode：Short press the key to perform single-shot
measurement; long press the key to perform continuous measurement.
In calibration mode: press the key to confirm the calibration.
z In calibration mode, press the key to select standard solution.
3.5 Battery Installation
1. Use the screwdriver to remove the four screws on the battery cover and open the
battery cover.
2. Insert 4 pieces of “AA” alkaline battery. Please make sure the polarity is correct.
3. Put on the battery cover and screw tightly.
4. Meter Calibration
TN100 turbidity meter needs to be calibrated with the provided standard solution when
used for the first time. For normal use, it is suggested to calibrate the meter monthly or
weekly; or user can perform verification test, which is to test the standard solution that is
close to the value of the test sample. If the error is big, it is necessary to calibrate the meter.
To ensure the accuracy, 4 polymer standards included in the meter kit should be selected to
calibrate the meter.
4.1 Calibration Standards
TN100 turbidity meter adopts US EPA certified Reagecon high-molecular polymer turbidity
standard solution. Compared with traditional Formazin standard solution, Reagecon
standard solution has a lot of advantages, such as non-toxicity, high accuracy, long
shelf-life, traceable to NIST and so on. The standard solution supplied in the TN 100
turbidity meter kit has a shelf-life of 12 months (from the date of manufacture). Please
check the date on the bottom of the vials before using.
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4.2 Calibration Procedure
1）Apply a little silicone oil on the
calibration vial and wipe with the soft
cloth to obtain an even distribution.
Turn the vial of 20.0, 100, 800 NTU
upside down several times and set it
still for 2 mins.(0.02 NTU doesn’t
need to be overturned)
4) Press key to enter into
calibration menu, and press
key to perform calibration when
cursor indicates on 0.02NTU.
7) After calibration with 20.0 NTU
standard, press key to
enter into calibration menu.
2）Press key to turn on the
meter. The meter indicates
measuring mode.
After calibration with 0.02NTU
5)
standard, press key to
enter into calibration menu.
8) When cursor indicates on
100NTU, put the calibration vial of
100NTU into the sample well and
press key to calibrate.
3) Open the flip cover and put in
0.02NTU calibration vial. Align the
mark on the vial with the mark on
the sample well and then close the
cover.
6) When cursor indicates on
20.0NTU, put the calibration vial of
20.0 NTU into the sample well and
press key to calibrate
9) After calibration with 100 NTU
standard, press key to
enter into calibration menu.
10) When cursor indicates on
800NTU, put the calibration vial of
800 NTU into the sample well and
press key to calibrate.
11) After calibration with 800 NTU
standard, press key to
confirm.
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12) The meter enters into
measuring mode.
4.3 Calibration Notes
1) Place turbidimeter on a flat and level surface,
please don’t hold the instrument in hand.
2) When place calibration vial into measuring well, the arrow
mark on vial cap must be aligned with the arrow mark on
the measuring well. See diagram-4
3) Apply 1-2 drops of silicone oil on the calibration vial and
wipe even with soft cloth to cover up the scratches and
flaws on the glass surface. It’s helpful for light scattering. After wiping and cleaning, set
the calibration vial still on the table for at least 2 minutes to eliminate micro bubble in
solution. For 0.02 NTU calibration vial, the standing time should be at least 5 minutes.
4) Please perform 4 points calibration for first time use according to clause 4.3. 2~4 points
calibration can be selected for subsequent use according to requirement. Measuring
value is better to be between two calibration values. When calibrating, press
or to select calibration standard. After calibrating, press button to quit
and enter into measurement mode.
5) If use Formazin standard to calibrate, please note the diluents Formazin standard is not
stable. Please make sure to use new prepared Formazin standard to ensure calibration
precision.
6) Please don’t open cap of calibration vial. Inspect the expiration of calibration standard.
Make sure the calibration vial free from dust, dirt, fingerprint and scratch.
7) Please use same method to calibrate every time, and establish standard operating
procedure.
Diagram- 4
5. Turbidity Measurement
5.1 Sample Vial Handling
1) There are 3 sample vials contained with the instrument, marked 1#, 2# and 3# on the
vial cap. There is also same number in the bottom of sample vial. Please note the
number of sample vial should be same with that of vial cap, don’t mix up.
2) Sample vial has been meticulously cleaned and disinfected. It can be used directly for
the first time. When subsequent using sample vial should be strictly cleaned: wash the
interior and exterior of the vial in a detergent solution repeatedly rinse with clean
distilled water or deionized water rinse sample vial with sample solution twice
fill sample vial with sample solution
screw the vial cap tightly.
5.2 Measurement Preparation
1) Collect sample solution in clean vessel, fill sample solution to the
four fifth position of sample vial(approx 18ml), see diagram-5,
screw the vial cap tightly.
2) Before measuring, please make sure sample solution is uniform.
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Diagram- 5
Slowly roll over the sample vial to make sample solution uniform, and wait air bubble to
eliminate completely.
3) Wipe the sample vial surface with the soft cloth. Ensure that the outside of the vial is
dry, clean and free from smudges.
4) Apply 1~2 drops of silicone oil on the vial surface. Wipe with a soft cloth to obtain an
even distribution over the entire vial’s surface, in order to fill small scratches and mask
the imperfection on vial surface.
5) Place turbidimeter on a flat and level surface, please don’t handheld the instrument.
6) Hold vial cap, aligning the arrow mark on vial cap with the arrow mark on the calibration
well, insert sample vial into the measuring well and close the cover
5.3 For Single-shot Measurement
Press button, the display shows progress
bar(see diagram-6). It will display measured value
after 8 seconds. Please press button again for
repeated measurement.
5.4 For Continuous Measurement
Diagram-6
1) Press and hold button, release it until the display
shows wire frame of process bar(see diagram-7). The
instrument enters into continuous measurement mode, the
display is updated every 8 seconds, continuous measurement
and display. If to quit, press button again, the
instrument will enter into single-shot measurement.
Diagram-7
2) Continuous measurement mode can be used to observe the process of turbidity
changes to stable. It’s also suitable for sample solution which precipitates faster, record
every measuring value and calculate the average value.
5.5 Measurement Notes
Turbidity is a very complex analytical measurement which can be affected by many
factors. Some are inherent in the instrument’s design. However, there are also other
factors such as stray light, air bubbles, care of vial and operating technique etc.
1) Sample Vial
Sample vial must be meticulously clean and free from spot and scratches. Its surface
should be applied some silicone oil and wiped by soft cloth to treat on the outside with
a uniform thin coat of silicone oil. This is to mask minor imperfections and scratches
that may contribute to stray light. Do not apply large quantity of oil as this may collect
dirt and dust. When wiping sample vial, it should be handled only by the top to avoid
fingerprints left on the surface of glass vial.
2) Silicone Oil
The refractive index of silicone oil should be same with that of glass vial. It is
recommended to use silicone oil supplied with the instrument.
3) Match Sample Vials
Instrument is supplied with 3 sample vials which were optically matched when leaving
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factory, they have good consistency. If user need to purchase more sample vials,
please use separately according to a set of 3 pieces. Or user can operate optical
match by himself, the method as below: clean the sample vial, fill about 0.5 NTU pure
water or distilled water into vial. After cleaning the surface of vial, more than 5 minutes
stewing time to eliminate bubble. For each vial, rotate and measure the data of 8
angles and record it. Find the closest position of these vials measuring value and mark
it.
4) Mix and Degassing
Samples should not be violently shaken or agitated. It is recommended to slowly roll
over sample vial to make solution evenly; Air bubble in solution will cause big error to
turbidity measurement. So air bubble must be eliminated before measuring. But
obviously mix and degassing is a process of contradiction, especially for solution with
precipitate, it’s much more difficult to handle. Need some operating experience or
stipulate some measurement condition. For example, stipulate same mix condition and
stewing time for degassing, then compare measuring value.
5) Low Turbidity Measurement
To measure sample with very low turbidity, it’s better to use same sample vial. This can
offer best accuracy and repeatability.
6) Other Requirement
a) On the premise of ensuring uniform sample, sample should be measured immediately
to prevent temperature changing and precipitate from effecting measuring value.
b) As far as possible to avoid the sample dilution for measurement.
c) Avoid operating under direct sunlight.
d) Don’t pour solution into measuring well, sample vial must be used for measurement.
e) Please don’t try to wash measuring well, this may damage the optical structure of
measuring well.
6. Warranty
6.1 Since the purchasing date, the meter is supplied with a 2-year guarantee period and
calibration standards for 6 months.
Within the guarantee period, repair, component or product replacement will be made
without charge due to unable work caused by manufacturing defects.
6.2 The above warranty shall not inadequate maintenance by customer, or damage caused
by opening to apply to defects resulting from improper use, repair by oneself.
Cole-Parmer Instruments
625 E Bunker Court
Vernon Hills, IL 60061
www.coleparmer.com
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