Kensington KS-TB-100 User manual

User Manual
KS-TB-100 | Portable Turbidity
Meter
Kensington Scientific
22a Cavan Rd, Dry Creek
South Australia, 5094
[e-mail]
www.kensingtonscientific.com.au
OVERVIEW
Below are the steps you need to follow to begin using your Kensington KS-TB-100 portable turbidity meter. This
manual provides a step-by-step guide to help you operate the meter.
UNPACKING METER CONTENTS
Before unpacking the meter and its contents, ensure that the working conditions meet the following conditions:
1. Relative humidity is less than 80%.
2. Ambient temperature is greater than °C and less than 60°C
3. No potential electromagnetic interference.
INCLUDED ACCESSORIES
The KS-TB-100 portable turbidity meter includes;
1. Glass sample vials
2. Calibration standards 0, 10, 200 and 1000 NTU
3. Lint-free cloth
4. 9V battery
OPERATING PRINCIPLES
The KS-TB-100 portable turbidity meter operates on the nephelometric principle of turbidity measurement and is
designed to meet the criteria specified in ISO 7027.
The following figure shows basic optical system of the meter. It includes a light source and a detector to monitor the
light scattered at 90° with respect to the incident beam.

User Manual
KS-TB-100 | Portable Turbidity
Meter
Kensington Scientific
22a Cavan Rd, Dry Creek
South Australia, 5094
[e-mail]
www.kensingtonscientific.com.au
OVERVIEW
The KS-TB-100 measures turbidity from 0 to 1100 NTU/FNU, or 0 to 275 EBC, or 0 to 9999 ASBC. The setup menu
contains the 7 optional parameters. Data can be stored and transferred to the computer by USB interface.
INDEX
Number
Description
1
Sample chamber
2
USB Interface
3
Alignment arrow
4
Measurement module
5
Battery Compartment

User Manual
KS-TB-100 | Portable Turbidity
Meter
Kensington Scientific
22a Cavan Rd, Dry Creek
South Australia, 5094
[e-mail]
www.kensingtonscientific.com.au
DISPLAY
Low Battery Alarm:
When battery is depleted, the icon will
disappear
Setup mode icon: Indicates meter is in
SETUP mode
Measurement mode icon: Indicates meter is in
the measurement mode
Memory mode icon: Indicates data is stored
into memory
Calibration mode icon: Indicates meter is in
the calibration mode
Calibration icon: Indicates meter is
calibrating
KEYPAD
Key
Description
1. Switching the turbidity meter On or Off.
2. Press the key to perform a measurement.
3. In the calibration or setting mode, exits current mode and returns to measurement.
1. Press the key to enter the calibration mode.
2. Press and hold the key to enter the setup menu.
1. Press the key to store current measured value.
2. Press ◄ key in setup mode to scroll up through menu.
3. Press ◄ key in setting mode to increase the setting value.
1. Press the key to view stored data.
2. Press ► key in setup mode to scroll down through menu.
3. Press ► key in setting mode to decrease the setting value.
Confirms the calibration, setting value or displayed option

User Manual
KS-TB-100 | Portable Turbidity
Meter
Kensington Scientific
22a Cavan Rd, Dry Creek
South Australia, 5094
[e-mail]
www.kensingtonscientific.com.au
SETUP MENU
The KS-TB-100 portable turbidity meter contains an integrated setup menu that allows users to customize each
displayed option for their measurement needs.
Parameter
Description
Options
Description
DATE
Date and Time
Sets the data and time
UNIT
Sets the measurement unit
NTU (Default)
Nephelometric Turbidity
Unit
FNU
Formazin Nephelometric
Unit
EBC
European Brewery
Convention
ASBC
American Society if
Brewing Chemistries
RESO
Sets the resolution for
measurement
0.1
Resolution at 0.1
0.01 (Default)
Resolution at 0.01
CLR
Clear all stored data
YES
Enable
NO (Default)
Disable
OFF
Automatically turns off the
meter
YES
Enable
NO (Default)
Disable
RST
Restore Factory Settings
YES
Enable
NO (Default)
Disable
TEST
Measurement mode
1 (Default)
Single measurement
2
Continuous
SETTING THE DATE AND TIME
1. Press and hold the CAL key to enter setup mode. The first option should be the date settings. The display should
show ‘DATE/P-1’.
2. Press ENTER key to confirm, the meter shows current year.

User Manual
KS-TB-100 | Portable Turbidity
Meter
Kensington Scientific
22a Cavan Rd, Dry Creek
South Australia, 5094
[e-mail]
www.kensingtonscientific.com.au
3. Press ◄ or ► key to set the year, press ENTER key to confirm. The meter shows current date and time (Format:
mm-dd, hh-mm).
4. Press ◄ or ► key to set the date and time, press ENTER key to confirm until the meter returns to measurement
mode. Setting is completed.
SETTING THE TURBIDITY UNIT
1. Press and hold the CAL key for three seconds to enter setup mode.
2. Press ◄or ► key until the display show ‘UNIT/P-2’
3. Press ENTER to confirm. The meter should then display the current turbidity unit.
4. Press ◄or ► key until to select the desired measurement unit.
5. Press ENTER to confirm and the meter should return to measurement mode.
SETTING THE RESOLUTION
1. Press and hold the CAL key for three seconds to enter setup mode.
2. Press ◄or ► key until the display show ‘rESO/P-3’.

User Manual
KS-TB-100 | Portable Turbidity
Meter
Kensington Scientific
22a Cavan Rd, Dry Creek
South Australia, 5094
[e-mail]
www.kensingtonscientific.com.au
3. Press ENTER to confirm. The meter should show ‘0.1/rESO’.
4. Press ◄or ► key to select the desired resolution.
5. Press ENTER to confirm. The meter should return to measurement mode.
AUTO-POWER OFF
1. Press and hold the CAL key to enter setup mode.
2. Press ◄or ► key until the display show ‘OFF/P-5’
3. Press ENTER key to confirm, the meter shows “no/OFF” indicating that the auto-power off function is disabled.
4. Press ◄or ► to enable or disable this function

User Manual
KS-TB-100 | Portable Turbidity
Meter
Kensington Scientific
22a Cavan Rd, Dry Creek
South Australia, 5094
[e-mail]
www.kensingtonscientific.com.au
SELECTING MEASUREMENT MODE
The KS-TB-100 has two measurement modes. These are single and continuous.
1. Press and hold the CAL key to enter setup mode.
2. Press ◄or ► key until the display show ‘test/P-07
3. Press ENTER key to confirm, the meter shows “1/tESt” indicating that the single measurement mode is selected.
4. Press ◄or ► key, the meter shows “2/tESt” indicating that the continuous measurement mode is selected.
5. Select the desired measurement mode, press ENTER key to confirm. The meter returns to measurement mode.
CALIBRATION
GUIDELINES FOR MEASUREMENT AND CALIBRATION
1. Do not hold the meter in the hand during measurement and calibration.
2. Glass vials and caps must be cleaned thoroughly with deionised water after each measurement. Minor residuals can
cause errors.
3. The outside of the vial must be clean and dry, before starting the test. Wipe the vial with a lint-free cloth to remove
fingerprints or waterdrops.
4. 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.
5. For the low turbidity samples (0 to 200 NTU), we recommend that you use the same vial to perform the
measurement or calibration.

User Manual
KS-TB-100 | Portable Turbidity
Meter
Kensington Scientific
22a Cavan Rd, Dry Creek
South Australia, 5094
[e-mail]
www.kensingtonscientific.com.au
6. Ensure that the vial is positioned in the sample chamber, the mark on the vial must be aligned with the arrow on the
meter.
7. To avoid errors from ambient light interference, do not use the meter in bright sunlight. Always close the light shield
lid during measurement and calibration.
8. Avoid spillage of water in the sample chamber. It may cause damage the meter.
9. The KS-TB-100 portable is calibrated with Formazin Standards at the factory and does not require user calibration
before use.
10. Do not shake or agitate the calibration standard violently to prevent air bubbles.
11. In order to get accurate measuring results, we recommend that you calibrate the meter at least once a month.

User Manual
KS-TB-100 | Portable Turbidity
Meter
Kensington Scientific
22a Cavan Rd, Dry Creek
South Australia, 5094
[e-mail]
www.kensingtonscientific.com.au
THE CALIBRATION PROCESS
1. Press CAL key, the display shows “2/CAL” indicating that the meter will perform the 2 points calibration
2. If necessary, press ◄ or ► to select the number of calibration points (2 to 5 points).
3. Press ENTER key to confirm, the display shows “0.02 NTU/CAL1” and continuously flashing.
4. Press ◄ or ► to select desired calibration point (e.g., 10.00 NTU).
5. Insert the corresponding standard into the sample chamber, ensure that the mark on the vial cap always aligns with
the arrow on the meter.
6. Close the light shield lid.

User Manual
KS-TB-100 | Portable Turbidity
Meter
Kensington Scientific
22a Cavan Rd, Dry Creek
South Australia, 5094
[e-mail]
www.kensingtonscientific.com.au
7. Press ENTER key, the displayed value stops flashing.
8. Press ◄ or ► when needed to modify the calibration value.
9. Press ENTER key, the “vial” icon begins flashing.
10. Wait for the measured value to stabilize, the “vial” icon will disappear on the display.
11. Press ENTER key to confirm.
12. The display shows “0.02 NTU/CAL2” and continuously flashing.
13. Repeat steps 4 to 11 above until the display shows “End”, the meter returns to measurement mode. Calibration is
completed.

User Manual
KS-TB-100 | Portable Turbidity
Meter
Kensington Scientific
22a Cavan Rd, Dry Creek
South Australia, 5094
[e-mail]
www.kensingtonscientific.com.au
TURBIDITY MEASUREMENT
An accurate turbidity measurement depends on good measurement techniques. Factors such as clean sample vials,
positioning of vial in the sample chamber, covering the vial with the light shield lid, meter calibration and the proper
removal of bubbles.
Please refer to the other guidelines mentioned in the ‘guidelines section’ for more information.
SINGLE MEASUREMENT FOR LOW TURBIDITY SAMPLES
1. Rinse the vial with approximately 10 ml 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.
2. Fill the vial with the sample. Cap the vial.
3. Allow the vial to stand undisturbed for 1 minute so that bubbles can disappear.
4 Wipe the vial with the lint-free cloth to remove water drops and fingerprints. Ensure that the outside of the vial is dry
and clean.
5 Place the vial in the sample chamber. Align the mark on the vial with the arrow on the meter.
6. Close the light shield lid. Press the MEAS key to measure. The measure icon should start flashing.
7. Wait for the indicator to stop flashing as the measurement stabilizes.

User Manual
KS-TB-100 | Portable Turbidity
Meter
Kensington Scientific
22a Cavan Rd, Dry Creek
South Australia, 5094
[e-mail]
www.kensingtonscientific.com.au
SINGLE MEASUREMENT FOR HIGH TURBIDITY SAMPLES
1. The high turbidity samples (>1100 NTU) must be diluted before measurement.
2. The dilution water can be obtained by filtering deionized water through a <0.45µm filter membrane.
3. Repeat steps 1.1 to 1.7 above and record the measured value.
4. Calculate the true turbidity of the original sample using the following formula:
Where: T = True turbidity of the original sample, Td= Measured value, Vs= Volume of the original sample (mL), Vd=
Volume of the dilution water (mL).
CONTINUOUS MEASUREMENTS
1. Select the continuous measurement mode in the setup menu (Refer to page 10 "Selecting the measurement
mode").
2. Fill the vial with the sample. Cap the vial.
3. Gently invert the vial several times to mix the sample.
4. Wipe the vial with the lint-free cloth to remove waterdrops and fingerprints. Ensure that the outside of the vial is dry
and clean.
5. Place the vial in the sample chamber. Align the mark on the vial with the arrow on the meter.
6. Close the light shield lid. Press MEAS key, the “Measure” icon begins flashing.
7. Press and hold the power button to turn off the meter and exit continuous calibration mode.
SPECIFICATIONS
Measurement Method
ISO 7027 nephelometric method (90°)
Measurement 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)
Default Calibration
Standards
0.02 NTU, 10.00 NTU, 200 NTU, 500 NTU, 1000 NTU or User-Defined
Light Source
Infrared-emitting diode (850 nm wavelength)
Detector
Silicon Photodiode
Stray Light
< 0.02 NTU
Sample Vials
60(H) × 25(Dia)mm
Power Off
Manual or Automatic (15 minutes)
Reset Function
Yes
Memory
Stores up to 100 data sets
Output
USB Communication Interface
Operating Temperature 0
0~60°C
Power Requirements
1× 9V Battery
Dimensions
180(L)× 85(W)× 70(H)mm