Turner Turbidity Plus User manual

User’s Manual
February 28, 2020
P/N 998-2187
Revision G
TURNER DESIGNS
1995 N. 1st Street
San Jose, CA 95112
Phone: [phone]
FAX: [phone]

Turbidity Plus Sensor
998-2187 Rev. G Page 2
Table of Contents
1.
Introduction
1.1
Description
4
2.
Inspection and Setup
2.1
Housing Configurations
5
2.2
Optional Accessories
5
2.3
Functional Test for Turbidity Plus with connector with P/N 2200-170
7
2.4
Functional test for Turbidity Plus with connector with Fondriest
Cable
2.5
Functional test of the wiper for the Turbidity Plus with connector
P/N 2200-170
8
2.6
Functional test of the wiper for the Turbidity Plus with connector
with Fondriest Cable
9
3.
Calibration
3.1
Direct Concentration Calibration for Turbidity Plus
10
4.
Integration
4.1
To take measurements
12
4.2
To trigger wiper
12
5.
Maintenance and Warranty
5.1
Maintenance
14
5.1.1
Rinsing
14
5.1.2
Care for the bulkhead connector
14
5.1.3
Cleaning the Optics
14
5.2
Warranty Terms
14
5.3
Warranty Service
14
5.4
Out of Warranty Service
15
Appendices
A
Specifications
17
B
Recommended Measurement Practices
18
C
Pigtail Cable and Connector Information
19
D
Functional Test for Turbidity Plus with no Connector
20

Turbidity Plus Sensor
998-2187 Rev. G Page 3
WASTE ELECTRICAL AND ELECTRONIC EQUIPMENT (WEEE)
DIRECTIVE
Turner Designs is in the business of designing and selling products that benefit the
well-being of our environment. Accordingly, we are concerned with preserving the
surroundings wherever our instruments are used and happy to work with customers
by complying with the WEEE Directive to reduce the environmental impact resulting
from the use of our products.
WEEE Return Process:
To arrange the return of an end-of-life product, proceed as follows:
If you purchased your instrument through a Turner Designs Distributor please
contact your local representative. They will instruct you where to return the end-
of-life product.
If you purchased your instrument directly from Turner Designs please contact
Turner Designs Customer Service
By Phone: [phone] or Toll Free: [phone]
By Email: Customer Service at [e-mail]
Turner Designs will provide a WEEE RMA Number, a Shipping Account
Number, and a Ship to Address. Package and ship the product back to Turner
Designs.
The product will be dealt with per Turner Designs’ end-of-life recycling program in
an environmentally friendly way.

Turbidity Plus Sensor
998-2187 Rev. G Page 4
1. Introduction
1.1 Description
Turbidity PlusTM is an accurate single-channel turbidity sensor with an
integrated, user-controlled wiper motor. It is designed for integration with
multiparameter systems and dataloggers from which it receives power and wiper
motor triggers at user-defined intervals. Turbidity Plus is available in two linear
ranges up to 500 or 3,000 NTU with minimum detection limits of 0.05 or 0.5 NTU
respectively. It delivers a voltage response proportional to the turbidity of the
sample which can be correlated to nephelometric turbidity unit (NTU)
concentrations by calibrating the sensor using AMCO Clear Turbidity Standards.
Deployable to 200 meters, Turbidity Plus is available in a variety of
configurations to facilitate integration.

Turbidity Plus Sensor
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2. Inspection and Setup
2.1 The Turbidity Plus Sensor is available in the following configurations:
Turbidity Plus Sensor with Integrated Wiper P/N 2180-000
oFully configured with connector and complete wiper assembly
Turbidity Plus with Integrated Wiper Motor and Wiper Assembly, No
Connector P/N: 2180-000-NC.
Turbidity Plus with Integrated Wiper Motor, No Wiper Assembly, No
Connector P/N: 2180-000-NCW
Turbidity Plus with Integrated Wiper Motor and Wiper Assembly, No Housing
P/N: 2180-000-NH
Turbidity Plus with Integrated Wiper Motor, No Wiper Assembly, No Housing,
P/N: 2180-000-NHW
500 NTU Turbidity Plus with Integrated Wiper P/N 2185-000
oFully configured with connector and complete wiper assembly
Note: The wiper shaft has a flat edge for the application of a set screw to
avoid unwanted movement of the wiper assembly.
2.2 Optional Accessories:
0.6 meter Pigtail Cable with Locking Sleeve P/N 2200-170
Turner Designs does not sell cables longer than 0.6M for the Turbidity
Plus. We recommend the following Fondriest Environmental products.
Fondriest Environmental
2091 Exchange Court
Fairborn, OH 45324
888.426.2151
937.426.2151
https://www.fondriest.com/nexsens-mcil-female-cable-assemblies.htm
P/N MCIL-8-FS-5 5 meter Pigtail Cable with Locking Sleeve
P/N MCIL-8-FS-10 10 meter Pigtail Cable with Locking Sleeve
Note: Fondriest cables have an orange outer shielding, consult wiring
instructions Figure 2 for pinout.

Turbidity Plus Sensor
998-2187 Rev. G Page 6
Note: Turbidity Plus without connector refer to Appendix D.
2.3 Functional test for Turbidity Plus with connector with Pigtail P/N 2200-170.
To perform a functional check on Turbidity Plus, connect the Pigtail
P/N 2200-170 colored wires to the power supply and multi-meter as shown in
Figure 1 below.
Additional Equipment required for functional tests:
DC Power Supply: 3-15 VDC, >100 mA
Multi-meter to read: 0 –5 VDC
Note: Supply voltages greater than 9 VDC will result in damage to the
sensor.
Figure 1
2
6
4
7
1
5
3
28
5
Turbidity Plus pins Pigtail P/N 2200-170
2
4
6
3
1
5
7
82
5

Turbidity Plus Sensor
998-2187 Rev. G Page 7
2.4 Functional test for Turbidity Plus with connector with Fondriest Cable P/N
MCIL-8-FS-5/10 5 or 10 meter Pigtail Cable with Locking Sleeve.
To perform a functional check on Turbidity Plus, connect the Fondriest Cable
colored wires to the power supply and multi-meter as shown in Figure 2 below.
Additional Equipment required for functional tests:
DC Power Supply: 3-15 VDC, >100 mA
Multi-meter to read: 0 –5 VDC
Note: Supply voltages greater than 9 VDC will result in damage to the
sensor.
Figure 2.
12.00 .015
+ -
DC Power Supply
PSU Positive Connection
Red (3)
Supply Ground
0 VDC Brown (4)
3.52
Multimeter
10 VDC
+-
Signal Output
“+” Yellow (5)
Analog Ground
“-” White (6)
Orange (1) Black (2)
No Connection
Turbidity Plus Pigtail Cable
Home Signal
Blue (7)
Wiper Trigger
Green (8)
Orange Cable
Wire Color Pin Function
Orange 1 N/A
Black 2 N/A
Red 3 Supply Voltage 3-15 VDC
Brown 4 Supply Ground 0 VDC
Yellow 5 Signal Out “+”, 0-5 VDC
White 6 Signal Ground “-”, 0-5 VDC
Blue 7 Home Signal
Green 8 Wiper Trigger. 3.2 VDC
Turbidity Plus pins
2
4
6
3
1
5
7
82
5
2
6
4
7
1
5
3
28
5
Orange
cable holes

Turbidity Plus Sensor
998-2187 Rev. G Page 8
With Turbidity Plus connected as shown in Figure 1 and 2 perform functional
tests to answer the following questions:
1. Is there voltage output?
The multi-meter should be reading some voltage >0 VDC
2. Does the voltage output change?
Move the palm of your hand towards the optical head and check if the
voltage output increases
Note: A visual test of the LED for Turbidity Plus is not possible because it is
IR, which is not visible.
2.5 Functional test of the wiper for Turbidity Plus with connector with P/N 2200-
170.
To perform a functional check on the wiper, connect the Pigtail colored wires to
the power supply and multi-meter following the steps below, shown in Figure 3.
1. Disconnect the blue wire from the meter and connect the yellow wire in its
place. It should read about 0 volts.
2. Briefly touch the orange wire to the power supply ground.
3. The wiper should start rotating and the meter should read about 3.2 volts
until the wiper returns to its home position.
Figure 3.
Note: The sensor has built in protection if the wiper becomes blocked and
cannot move. In this case the wipe will stop and will try to return to the home
position the next time it is triggered.
Warning: Do not move the wiper by hand. This can cause permanent damage
to the sensor.
12.00 .015
+ -
DC Power Supply
PSU PositiveConnection
(Red)
Supply Ground
0 VDC (Green)
3.20
Multimeter
10 VDC
+-
Home Signal
(Yellow)
Analog Ground
“-” (Brown)
Black White
No Connection
Turbidity Plus Pigtail Cable
Output Signal
“+” (Blue)
Wiper Trigger
(Orange)

Turbidity Plus Sensor
998-2187 Rev. G Page 9
2.6 Functional test of the wiper for Turbidity Plus with connector Fondriest
Cable.
To perform a functional check on the wiper, connect the Pigtail colored wires to
the power supply and multi-meter following the steps below, shown in Figure 4.
4. Disconnect the yellow wire from the meter and connect the blue wire in its
place. It should read about 0 volts.
5. Briefly touch the green wire to the power supply ground.
6. The wiper should start rotating and the meter should read about 3.2 volts
until the wiper returns to its home position.
Figure 4.
Note: The sensor has built in protection if the wiper becomes blocked and
cannot move. In this case the wipe will stop and will try to return to the home
position the next time it is triggered.
Warning: Do not move the wiper by hand. This can cause permanent damage
to the sensor.
12.00 .015
+ -
DC Power Supply
PSU Positive Connection
Red (3)
Supply Ground
0 VDC Brown (4)
3.20
Multimeter
10 VDC
+-
Home Signal
Blue (5)
Analog Ground
“-” White (6)
Orange (1) Black (2)
No Connection
Turbidity Plus Pigtail Cable
Output Signal
“+” Yellow (5)
Wiper Trigger
Green (8)

Turbidity Plus Sensor
998-2187 Rev. G Page 10
3. Calibration
Note: To make accurate and repeatable measurements it is important to
keep the sensor clean; see Section 5.1 for information on cleaning your
sensor.Refer to Appendix B - Recommended Measurement Practices.
3.1 Direct Concentration Calibration
Calibrating Turbidity Plus is a simple process that requires calibration standards
to create a correlation factor which is used to convert raw voltage data to NTU
concentrations.
Turner Designs recommends Amco Clear Turbidity Standards. They are non-
toxic safe solutions consisting mainly of deionized water that come prepared in a
broad range of concentrations and have a shelf life guaranteed for one year.
These standards are available from GFS Chemicals under part numbers 8506
(10 NTU), 8507 (100 NTU), 8620 (1000 NTU) and 8621 (3000 NTU). Follow
instructions below to establish a correlation between the standard’s
concentration and the sensor’s voltage response. Use the equation in step 6 to
calculate NTU concentrations.
1) Connect Turbidity Plus to a power source and multimeter; see figure 1 for
details.
2) Fill a darkened beaker with blank sample and use Turbidity Plus to measure
the voltage of the blank.
Note: A good blank to use for this application is ultra-pure or
deionized water.
3) Remove Turbidity Plus from the blank, pour out the blank sample, and fill the
same darkened beaker with a standard solution of known concentration.
4) Measure the voltage response of the standard solution.
5) Use the following equation to create a correlation factor:
[(CStd)/(VoltsStd - VoltsBlank)] = Correlation Factor
CStd = Concentration value of standard used for calibration
VoltsStd = Voltage reading from standard concentration
VoltsBlank = Voltage reading from blank
6) Use the following equation to calculate concentration from measured voltage
response:
CSample = (Correlation Factor) * (VoltsSample –VoltsBlank)
Csample = Concentration of sample