YSI 6 series User manual

6-Series
Multiparameter
Water Quality Sondes
User Manual
6-Series:
6600 V2
6600EDS V2
6920 V2
6820 V2
600 OMS V2
600XL
600XLM
600LS
600R
600QS

SAFETY NOTES
TECHNICAL SUPPORT AND WARRANTY INFORMATION
Contact information for technical support and warranty information on YSI’s Environmental
Monitoring Systems products can be found in Section 9, Warranty and Service Information.
COMPLIANCE
When using the YSI 6-Series sondes in a European Community (CE) country, please be aware
that electromagnetic compatibility (EMC) performance issues may occur under certain
conditions, such as when the sonde is exposed to certain radio frequency fields.
If you are concerned with these issues, consult the Declaration of Conformity that was enclosed
with your instrument. Specific conditions where temporary sensor problems may occur are listed
in this document.
The Declaration of Conformity for your instrument can be found in Appendix H, EMC
Performance. A similar document for YSI Model 650 is located at the end of Section 3, 650
MDS.
SPECIFICATIONS
For general specifications for all YSI Environmental Monitoring Systems products included in
this manual, please see Appendix O, Specifications.
GENERAL SAFETY CONSIDERATIONS
For Health and Safety issues concerning the use of the calibration solutions with the sondes,
please see Appendix A, Health and Safety.
NOTICE
Information contained in this manual is subject to change without notice. Effort has been made to
make the information contained in this manual complete, accurate, and current. YSI shall not be
held responsible for errors or omissions in this operations manual.
WARNING:
When caring for your sonde, remember that the sonde is sealed at the factory, and there is never a
need to gain access to the interior circuitry of the sonde. In fact, if you attempt to disassemble the
sonde, you would void the manufacturer's warranty.

TABLE OF CONTENTS
SECTION 1 INTRODUCTION
1.1 ABOUT YSI 1-1
1.2 HOW TO USE THIS MANUAL 1-1
1.3 UNPACKING AND INSPECTION 1.2
SECTION 2 SONDES
2.1 GETTING STARTED 2-1
2.2 CONNECTING YOUR SONDE 2-2
2.3 PREPARING THE SONDE FOR USE 2-5
2.4 ECOWATCH FOR WINDOWS – GETTING STARTED 2-24
2.5 SONDE SOFTWARE SETUP 2-25
2.6 GETTING READY TO CALIBRATE 2-34
2.7 TAKING READINGS 2-49
2.8 USING ECOWATCH TO UPLOAD AND ANALYZE DATA 2-54
2.9 SONDE MENU 2-68
2.10 CARE, MAINTENANCE, AND STORAGE 2-111
SECTION 3 650 MDS DATA LOGGER
3.1 INTRODUCTION 3-1
3.2 GETTING STARTED 3-1
3.3 SETTING UP THE 650 3-18
3.4 SONDE MENU INTERFACE 3-21
3.5 LOGGING DATA WITH THE 650 3-27
3.6 MANAGING 650 FILES 3-46
3.7 UPLOADING DATA FROM SONDES 3-51
3.8 USING GPS WITH 650 3-51
3.9 USING THE 650 BAROMETER 3-53
3.10 UPGRADING 650 SOFTWARE 3-55
3.11 TROUBLESHOOTING 3-56
3.12 FERRITE BEAD INSTALLATION 3-57
3.13 SAFETY CONSIDERATIONS 3-58
3.14 650 MDS SPECIFICATIONS 3-61
SECTION 4 ECOWATCH FOR WINDOWS
4.1 INTRODUCTION 4-1
4.2 DATA ACQUISITION AND ANALYSIS 4-7
4.3 ECOWATCH MENU 4-12
SECTION 5 PRINCIPLES OF OPERATION
5.1 CONDUCTIVITY 5-1
5.2 SALINITY 5-2
5.3 TOTAL DISSOLVED SOLIDS (TDS) 5-2
5.4 OXIDATION REDUCTION POTENTIAL (ORP) 5-3
5.5 pH 5-4
5.6 DEPTH AND LEVEL 5-6
5.7 TEMPERATURE 5-7
5.8 DISSOLVED OXYGEN RAPID PULSE 5-7
5.9 DISSOLVED OXYGEN ROX OPTICAL 5-10
5.10 NITRATE 5-12
5.11 AMMONIUM AND AMMONIA 5-14
5.12 CHLORIDE 5-16
5.13 TURBIDITY 5-17

5.14 CHLOROPHYLL 5-21
5.15 RHODAMINE 5-28
5.16 PHYCOCYANIN-CONTAINING BLUE-GREEN ALGAE 5-31
5.17 PHYCOERYTHRIN-CONTAINING BLUE-GREEN ALGAE 5-37
5.18 FLOW 5-42
SECTION 6 TROUBLESHOOTING
6.1 CALIBRATION ERRORS 6-1
6.2 SONDE COMMUNICATION PROBLEMS 6-2
6.3 SENSOR PERFORMANCE PROBLEMS 6-3
SECTION 7 COMMUNICATION
7.1 OVERVIEW 7-1
7.2 HARDWARE INTERFACE 7-1
7.3 RS-232 INTERFACE 7-2
7.4 SDI-12 INTERFACE 7.2
SECTION 8 UPGRADING SONDE FIRMWARE 8.1
SECTION 9 WARRANTY AND SERVICE INFORMATION
9.1 LIMITATIONS OF WARRANTY 9-1
9.2 AUTHORIZED SERVICE CENTERS 9-2
9.3 CLEANING INSTRUCTIONS 9-2
9.4 PACKING INSTRUCTIONS 9-2
9.5 PRODUCT RETURN FORM 9-4
APPENDIX A HEALTH AND SAFETY A-1
APPENDIX B REQUIRED NOTICE B-1
APPENDIX C ACCESSORIES AND CALIBRATION STANDARDS C-1
APPENDIX D SOLUBILITY AND PRESSURE/ALTITUDE TABLES D-1
APPENDIX E TURBIDITY MEASUREMENTS E-1
APPENDIX F FLOW F-1
APPENDIX G USING VENTED LEVEL G-1
APPENDIX H EMS PERFORMANCE H-1
APPENDIX I CHLOROPHYLL MEASUREMENTS I-1
APPENDIX J PERCENT AIR SATURATION J-1
APPENDIX K PAR SENSOR K-1
APPENDIX L PROTECTIVE ZINC ANODE L-1
APPENDIX M ROX OPTICAL DO SENSOR M-1
APPENDIX N NMEA APPLICATIONS N-1
APPENDIX O SPECIFICATIONS O-1

Introduction Section 1
YSI Incorporated Environmental Monitoring Systems Manual 1-1
SECTION 1 INTRODUCTION
1.1 ABOUT YSI INCORPORATED
From a three-man partnership in the basement of the Antioch College science building in 1948, YSI has
grown into a commercial enterprise designing and manufacturing precision measurement sensors and
control instruments for users around the world. Although our range of products is broad, we focus on three
major markets: water testing and monitoring, health care, and bioprocessing.
In the 1950s, Hardy Trolander and David Case made the first practical electronic thermometer using a
thermistor. This equipment was developed to supply Dr. Leland Clark with a highly sensitive and precise
temperature sensor for the original heart-lung machine. The collaboration with Dr. Clark has been critical
to the success of the company. In the 1960s, YSI refined a Clark invention, the membrane covered
polarographic electrode, and commercialized oxygen sensors and meters which revolutionized the way
dissolved oxygen was measured in wastewater treatment plants and environmental water. Today,
geologists, biologists, environmental enforcement personnel, officials of water utilities and fish farmers
recognize us as the leader in dissolved oxygen measurement.
In the 1970s, YSI again worked with Clark to commercialize one of his many inventions, the enzyme
membrane. This development resulted in the first practical use of a biosensor, in the form of a membrane
based on immobilized glucose oxidase, to measure blood sugar accurately and rapidly. In the next few
years, this technology was extended to other enzymes, including lactate oxidase, for applications in
biotechnology, health care, and sports medicine.
In the early 1990s, YSI launched a line of multi-parameter water monitoring systems to address the
emerging need to measure non-point source pollution. Today we have thousands of instruments in the field
that operate with the push of a button, store data in memory, and communicate with computers. These
instruments (described in this manual) are ideal for profiling and monitoring water conditions in industrial
and wastewater effluents, lakes, rivers, wetlands, estuaries, coastal waters, and monitoring wells. If the
instrument has ‘on board’ battery power, it can be left unattended for weeks at a time with measurement
parameters sampled at the user’s setup interval and data securely saved in the unit's internal memory. The
fast responses of YSI’s sensors make the systems ideal for vertical profiling, and the small size of some our
sondes allows them to fit down 2-inch diameter monitoring wells. All of YSI’s multi-parameter systems
feature either the YSI-patented Rapid Pulse Dissolved Oxygen Sensor, which exhibits low-stirring
dependence and provides accurate results without an expensive, bulky, and power-intensive stirrer or an ROX
optical dissolved oxygen sensor which exhibits no flow dependence and is extremely stable in long-term
deployments.
YSI has established a worldwide network of selling partners in over 50 countries that includes laboratory
supply dealers, manufacturers' representatives, and YSI’s sales force. A subsidiary, YSI UK, distributes
products in the United Kingdom, a sales office in Hong Kong supports YSI’s distribution partners in Asia
Pacific, and YSI Japan supports distribution partners in Japan.
Through an employee stock ownership plan (ESOP), every employee is one of the owners. In 1994, the
ESOP Association named YSI the ESOP Company of the Year. YSI is proud of its products and are
committed to meeting or exceeding customers' expectations.
1.2 HOW TO USE THIS MANUAL
The manual is organized to let you quickly understand and operate the YSI 6-Series environmental
monitoring systems. However, it cannot be stressed too strongly that informed and safe operation is more
than just knowing which buttons to push. An understanding of the principles of operation, calibration

Introduction Section 1
YSI Incorporated Environmental Monitoring Systems Manual 1-2
techniques, and system setup is necessary to obtain accurate and meaningful results. Thorough reading and
understanding of this manual is essential to proper operation.
Because of the many features, configurations and applications of these versatile products, some sections of
this manual may not apply to the specific system you have purchased.
If you have any questions about this product or its application, please contact YSI’s Technical Support
Group or authorized dealer for assistance. See Section 9, Warranty and Service Information for contact
information.
1.3 UNPACKING AND INSPECTION
Inspect the outside of the shipping box for damage. If any damage is detected, contact your shipping carrier
immediately. Remove the equipment from the shipping box. Some parts or supplies are loose in the
shipping box so check the packing material carefully. Check off all of the items on the packing list and
inspect all of the assemblies and components for damage.
If any parts are damaged or missing, contact your YSI representative immediately. If you purchased the
equipment directly from YSI, or if you do not know from which YSI representative your equipment was
purchased, refer to Section 8, Warranty and Service Information for contact information.

Sondes Section 2
YSI Incorporated Environmental Monitoring Systems Operations Manual 2-1
SECTION 2 SONDES
2.1 GETTING STARTED
The 6-Series Environmental Monitoring Systems from YSI are multi-parameter, water quality
measurement, and data collection systems. They are intended for use in research, assessment, and
regulatory compliance applications. Section 2 concentrates on sondes and how to operate them during
different applications. A sonde is a torpedo-shaped water quality monitoring device that is placed in the
water to gather water quality data. Sondes may have multiple probes. Each probe may have one or more
sensors that read water quality data.
The following list contains parameters that your sonde may measure. See Appendix O, Specifications for
the specific parameters of each sonde.
 Rapid Pulse Polarographic Dissolved Oxygen
 ROX Optical Dissolved Oxygen
 Conductivity
 Specific Conductance
 Salinity
 Total Dissolved Solids
 Resistivity
 Temperature
 pH
 ORP
 Depth
 Level
 Flow
 Turbidity
 Chlorophyll
 Rhodamine WT
 Phycocyanin-Containing Blue-green Algae
 Phycoerythrin-Containing Blue-green Algae
 Nitrate-N
 Ammonia-N
 Ammonium-N
 Chloride
This section is designed to quickly familiarize you with the hardware and software components of the
sondes and their accessories. You will then proceed to probe installations, cable connections, software
installation and finally basic communication with your Sonde. Diagrams, menu flow charts and basic
written instructions will guide you through basic hardware and software setup.

Sondes Section 2
YSI Incorporated Environmental Monitoring Systems Operations Manual 2-2
2.2 CONNECTING YOUR SONDE
There are a number of ways in which you may connect the sondes to various computers, data collection
devices and VT-100 terminal emulators. To utilize the configuration that will work best for your
application, make sure that you have all of the components that are necessary. The following list and
diagrams (Figures 1-4) are a few possible configurations.
 Sonde to Lab Computer (recommended for initial setup)
 Sonde to Data Collection Platform
 Sonde to Portable Computer
 Sonde to YSI 650 MDS Display/Logger
Figure 1

Sondes Section 2
YSI Incorporated Environmental Monitoring Systems Operations Manual 2-3
Figure 2
Sonde to Data Collection Platform
You will need...

Sonde

Field Cable

6096 Adapter with leads

Data Collection Platform
6096 MS-8 Adapter with Flying Leads
DCP
Field Cable
MS-8
Sonde
YSI
692
0
+
+
-
-
Figure 3

Sondes Section 2
YSI Incorporated Environmental Monitoring Systems Operations Manual 2-4
Figure 4
Sonde to 650 Display/Logger
You will need...

Sonde

Field Cable

650 MDS Display/Logger
YSI 650 operates on C-cells or rechargeable batteries.
650 MDS
610-DM
Environmental
Monitoring
Systems
YS
Field Cable
Sonde
YS
I
69
20
YS
I
69
20
+
+
-
-
MS-8

Sondes Section 2
YSI Incorporated Environmental Monitoring Systems Operations Manual 2-5
2.3 PREPARING THE SONDE FOR USE
To prepare the sonde for calibration and operation, you need to install probes (sensors) into the connectors
on the sonde bulkhead. In addition to probe installation, you need to install a new membrane on the YSI
6562 DO Probe if you are using this item. It is recommended that you install the DO membrane before
installing the probe onto the bulkhead. For membrane changes in the future, you may be able to perform
this operation without removing the DO probe. This will largely depend on whether the other installed
probes interfere with your ability to install a membrane. The next step is providing power for the sondes,
through batteries or line power, and then connecting a field cable. The four steps necessary for getting your
sonde ready for use are listed below.
Step 1 Installing the Dissolved Oxygen Membrane – Section 2.3.1
Step 2 Installing the Probes – Section 2.3.2
Step 3 Supplying Power – Section 2.3.3
Step 4 Connecting a Field Cable – Section 2.3.4
2.3.1 STEP 1 - INSTALLING THE DISSOLVED OXYGEN MEMBRANE
Note: If you are using a ROX Optical DO sensor for your applications, please skip to Section 2.3.2 at
this time.
The 6562 Rapid Pulse Polarographic DO probe is shipped with a protective dry membrane on the sensor tip
held in place by an O-ring. Remove the O-ring and membrane. Handle the probe with care. It is very
important not to scratch or contaminate the sensor tip. See Section 2.10.2, Probe Care and Maintenance,
for information on how often the membrane should be replaced.
Unpack the YSI 6562 DO Probe Kit and follow the instructions below.
Open the membrane kit and prepare the electrolyte solution. Dissolve the KCl in the dropper bottle by
filling it to the neck with deionized or distilled water and shaking until the solids are fully dissolved. After
the KCl is dissolved, wait a few minutes until the solution is free of bubbles.
Figure 5 Figure 6
The DO membrane can be installed with the DO probe either free or installed in the sonde. Both methods
are described in detail below. CAUTION: If you install the membrane with the probe not installed in
the sonde, be sure that the protective cap is installed on the probe end away from the sensor face to
ensure that the connector is not contaminated with electrolyte.
1.
ADD DI OR DISTILLED
WATER
2.
PROTECTIVE CAP
DRY MEMBRANE

Sondes Section 2
YSI Incorporated Environmental Monitoring Systems Operations Manual 2-6
DO MEMBRANE INSTALLATION WITH THE PROBE NOT INSTALLED IN THE
SONDE
Remove the protective cap and the dry membrane from the YSI 6562 Dissolved Oxygen probe.
Make sure that the protective cap is installed on the connector end of the probe. Do not allow the
electrolyte solution to wet the probe‟s connector and O-ring seal areas. This solution is extremely corrosive
to the connector and is difficult to remove.
Before using any electrolyte, wrap a clean, dry paper towel around the capped probe to catch any spilled
electrolyte. Hold the probe in a vertical position and apply a few drops of KCl solution to the tip. The fluid
should completely fill the small moat around the electrodes and form a meniscus on the tip of the sensor.
Be sure no air bubbles are stuck to the face of the sensor. If necessary, shake off the electrolyte and start
over.
Figure 7
Secure a membrane between your left thumb and the probe body.
Always handle the membrane with care, touching it only at the
ends.
With the thumb and forefinger of your right hand, grasp the free
end of the membrane. With one continuous motion, gently stretch
it up, over, and down the other side of the sensor. The membrane
should conform to the face of the sensor.
Secure the end of the membrane under the forefinger of your left
hand.
Roll the O-ring over the end of the probe, being careful not to
touch the membrane surface with your fingers. There should be no
wrinkles or trapped air bubbles. Small wrinkles may be removed
by lightly tugging on the edges of the membrane. If bubbles are
present, remove the membrane and repeat steps 3-8.
Trim off any excess membrane with a sharp knife or scissors.
Rinse off any excess KCl solution, but be careful not to get any
water in the connector.
If you are concerned that electrolyte may have dripped onto the O-
ring seal area, probe connector, or bulkhead connectors, rub the
area clean with paper towels wetted with Deionized water and then
dry the affected area with a final dry towel, compressed air blasts,
or rinse with fresh alcohol.
NOTE: You may find it more convenient to mount the probe vertically in a vise with rubber jaws while
applying the electrolyte and membrane to the sensor tip.
3
4
5
6
7
8

Sondes Section 2
YSI Incorporated Environmental Monitoring Systems Operations Manual 2-7
DO MEMBRANE INSTALLATION WITH THE PROBE INSTALLED IN THE SONDE
Secure the sonde in a vertical position using a vise or a clamp and ring stand such that the sensors are
upright. Remove the probe guard from the sonde.
Remove the old DO membrane and clean the probe tip with water and lens cleaning tissue. Make sure to
remove any debris or deposits from the O-ring groove.
Using the dropper bottle of electrolyte supplied, place electrolyte on the DO probe tip until a high meniscus
is formed as shown in Figure 8 below.
Figure 8 Figure 9
Hold the membrane so that all four corners are supported, but do not stretch the membrane laterally.
Position the membrane over the probe, keeping it parallel to the probe face as shown in Figure 9 above.
Using one continuous downward motion, stretch the membrane over the probe face as shown. See Figure
10 below. Do not hesitate to stretch the membrane.
Figure 10 Figure 11
Install a new O-ring by placing one side of the O-ring in the groove and rolling into place across the
membrane and into the groove on the opposite side of the probe face. Avoid touching the probe face with

Sondes Section 2
YSI Incorporated Environmental Monitoring Systems Operations Manual 2-8
your fingers. Once the O-ring is in position, squeeze it every 90 degrees to equalize the tension. See
Figure 11 above. DO NOT USE GREASE OR LUBICANT OF ANY KIND ON THE O-RING.
Using a hobby knife or a scalpel, trim the excess Teflon from the membrane, making your cut about 1/8
inch below the O-ring as shown in Figure 12 below. A razor blade can be used for the cut if no knife or
scalpel is available.
Figure 12 Figure 13
If the installation has been done properly, the finished product should have no bubbles, wrinkles, or tears as
shown in Figure 13 above.
NOTE: Observe the following cautions to assure that your membrane installation is proper:
 Secure the sonde tightly so that it will not move during membrane installation.
 Wash hands before installation and do not allow finger oils or O-ring lubricant to touch the probe face
or the membrane.
 Use caution when replacing the probe guard that you do not touch the membrane. If you suspect that
the membrane has been damaged, replace it immediately.
2.3.2 STEP 2 - INSTALLING THE PROBES
Remove the calibration cup from your sonde by hand as shown in Figure 14, to expose the bulkhead.
Figure 14
TRANSPORT CUP
BULKHEAD WITH
PROBE PORT PLUGS

Sondes Section 2
YSI Incorporated Environmental Monitoring Systems Operations Manual 2-9
REMOVING THE PORT PLUGS
Using the long extended end of the probe installation tool supplied in the YSI 6570
Maintenance Kit, remove the port plugs. Save all the port plugs Figure 15
for possible future use.
There are a variety of probe options for the sondes. Figures 15, 16 and 17
illustrate the uses of the common tool for port plug removal.
Note that this tool will also be used to install the various probes.
If the tool is misplaced or lost, you may use 7/64” and 9/64” hex keys as
substitutes.
Figure 16 Figure 17
Figure 18
NOTE: You may need pliers to remove the ISE port
plugs, but do not use pliers to tighten the ISE probes.
Hand-tighten only.
Now refer to Figures 19-24 to find the probe locations in
your sonde.
OPTIC
PORT PLUG
INSTALLATION
TOOL
DO, COND., &
pH/ORP PORT
PLUGS
INSTALLATION
TOOL
ISE PORT PLUG
PLIERS
(SLIP JAWS)

Sondes Section 2
YSI Incorporated Environmental Monitoring Systems Operations Manual 2-10
600XL & 600XLM SONDE BULKHEAD
3 Port Sonde: 1 Rapid Pulse DO, 1 Conductivity/Temperature, and 1 pH/ORP
Figure 19
 6562 Dissolved oxygen probe = 3-pin connector
 6560 Conductivity/Temperature = 6-pin connector
 6561 pH probe = 4 pin connector
 6565 Combo pH/ORP probe = 4 pin connector
6600V2-2 SONDE BULKHEAD
8 Port Sonde: 1 Rapid Pulse DO, 1 Conductivity/Temperature, 2 Optical, 3 ISE, 1 pH/ORP
Figure 20A
 6562 Dissolved oxygen probe = 3-pin connector
 6560 Conductivity/Temperature = 6-pin connector
 6561 or 6561FG pH probe = 4 pin connector
 6565 or 6565FG pH/ORP probe = 4 pin connector
 6566 Fouling Resistant pH/ORP probe = 4 pin connector
 6882 Chloride Probe = leaf spring connector
 6883 Ammonium Probe = leaf spring connector
 6884 Nitrate Probe = leaf spring connector
 6026 Turbidity Probe, Wiping = 8 pin connector
 6136 Turbidity Probe, Wiping = 8 pin connector
 6025 Chlorophyll Probe, Wiping = 8 pin connector
 6130 Rhodamine WT Probe, Wiping = 8 pin connector
 6150 Optical Dissolved oxygen probe = 8 pin connector
 6131 PC-Blue-green Algae probe = 8 pin connector
 6132 PE-Blue-green Algae probe = 8 pin connector
DISSOLVED
OXYGEN
6562
CONDUCTIVITY/
TEMPERATURE
6560
ALL ISE
PROBES
Cond./Temp.
Optic T
pH/ORP
ISE‟s
ISE‟s
ISE‟s
Dissolved Oxygen
Optic C

Sondes Section 2
YSI Incorporated Environmental Monitoring Systems Operations Manual 2-11
6600EDS V2-2 SONDE BULKHEAD
5 Port Sonde: 1 Rapid Pulse DO, 1 Conductivity/Temperature, 2 Optical, 1 pH/ORP
Figure 20B
 6562 Dissolved oxygen probe = 3-pin connector
 6560 Conductivity/Temperature = 6-pin connector
 6561 or 6561FG pH probe = 4 pin connector
 6565 or 6565FG pH/ORP probe = 4 pin connector
 6566 Fouling Resistant pH/ORP probe = 4 pin connector
 6026 Turbidity Probe, Wiping = 8 pin connector
 6136 Turbidity Probe, Wiping = 8 pin connector
 6025 Chlorophyll Probe, Wiping = 8 pin connector
 6130 Rhodamine WT Probe, Wiping = 8 pin connector
 6150 Optical Dissolved oxygen probe = 8 pin connector
 6131 PC-Blue-green Algae probe = 8 pin connector
 6132 PE-Blue-green Algae probe = 8 pin connector
6600V2-4 SONDE BULKHEAD
6 Port Sonde: 1 Conductivity/Temperature, 4 Optical, 1 pH/ORP
Figure 20C
 6560 Conductivity/Temperature = 6-pin connector
 6561 or 6561FG pH probe = 4 pin connector
 6565 or 6565FG pH/ORP probe = 4 pin connector
 6566 Fouling Resistant pH/ORP probe = 4 pin connector
 6026 Turbidity Probe, Wiping = 8 pin connector
 6136 Turbidity Probe, Wiping = 8 pin connector
 6025 Chlorophyll Probe, Wiping = 8 pin connector
 6130 Rhodamine WT Probe, Wiping = 8 pin connector
 6150 Optical Dissolved oxygen probe = 8 pin connector
 6131 PC-Blue-green Algae probe = 8 pin connector
 6132 PE-Blue-green Algae probe = 8 pin connector
Cond/Temp – 6 pin
pH/ORP – 4 pin
Cond//Temp – 6 pin
pH/ORP – 4 pin
Rapid Pulse DO – 3 pin

Sondes Section 2
YSI Incorporated Environmental Monitoring Systems Operations Manual 2-12
6820V2-1 & 6920V2-1 SONDE BULKHEADS
7 Port Sonde: 1 Rapid Pulse DO, 1 Conductivity/Temperature, 1 Optical, 1 pH/ORP, 3 ISE
Figure 21A
 6562 Dissolved oxygen probe = 3-pin connector
 6560 Conductivity/Temperature = 6-pin connector
 6561 or 6561FG pH probe = 4 pin connector
 6565 or 6565FG pH/ORP probe = 4 pin connector
 6566 Fouling Resistant pH/ORP probe = 4 pin connector
 6882 Chloride Probe = leaf spring connector
 6883 Ammonium Probe = leaf spring connector
 6884 Nitrate Probe = leaf spring connector
 6026 Turbidity Probe, Wiping = 8 pin connector
 6136 Turbidity Probe, Wiping = 8 pin connector
 6025 Chlorophyll Probe, Wiping = 8 pin connector
 6130 Rhodamine WT Probe, Wiping = 8 pin connector
 6150 Optical Dissolved oxygen probe = 8 pin connector
 6131 PC-Blue-green Algae probe = 8 pin connector
 6132 PE-Blue-green Algae probe = 8 pin connector
6820V2-2 & 6920V2-2 SONDE BULKHEADS
5 Port Sonde: 1 Conductivity/Temperature, 2 Optical, 1 pH/ORP, 1 ISE
Figure 21B
 6560 Conductivity/Temperature = 6-pin connector
 6561 or 6561FG pH probe = 4 pin connector
 6565 or 6565FG pH/ORP probe = 4 pin connector
 6566 Fouling Resistant pH/ORP probe = 4 pin connector
 6882 Chloride Probe = leaf spring connector
 6883 Ammonium Probe = leaf spring connector
 6884 Nitrate Probe = leaf spring connector
 6026 Turbidity Probe, Wiping = 8 pin connector
 6136 Turbidity Probe, Wiping = 8 pin connector
 6025 Chlorophyll Probe, Wiping = 8 pin connector
 6130 Rhodamine WT Probe, Wiping = 8 pin connector
 6150 Optical Dissolved oxygen probe = 8 pin connector
 6131 PC-Blue-green Algae probe = 8 pin connector
 6132 PE-Blue-green Algae probe = 8 pin connector
MOUNTING
SCREW
3
5
4
DISSOLVED
OXYGEN
COND/TEMP
ISE1/ISE2
pH/ORP
ISE3
ISE4
ISE5
OPTICAL

Sondes Section 2
YSI Incorporated Environmental Monitoring Systems Operations Manual 2-13
600LS BULKHEAD
Figure 21C
If are working with a 600LS, all sensors will have been installed
at the factory.
600R BULKHEAD
Figure 22
If are working with a 600R sonde, your instrument
will arrive with the probes installed.
600QS BULKHEAD
Figure 23
If are working with a 600QS sonde, your
instrument will arrive with the probes installed.
TEMPERATURE
pH GLASS
pH REFERENCE
6850
CONDUCTIVITY
DISSOLVED
OXYGEN
TEMPERATURE
pH GLASS/ORP
pH REFERENCE
6850
CONDUCTIVITY
DISSOLVED
OXYGEN
Conductivity
Temperature
Depth

Sondes Section 2
YSI Incorporated Environmental Monitoring Systems Operations Manual 2-14
600 OMS V2-1 BULKHEAD
Figure 24
The conductivity sensor (module/port) for the
600 OMS V2-1 is factory installed. Optical probes
(turbidity, chlorophyll, rhodamine WT, ROX
optical DO, BGA-PC, and BGA-PE) are
threaded into the optical port on the bottom
of the sonde by the user.
LUBRICATE O-RINGS
Apply a thin coat of O-ring lubricant, supplied in the YSI 6570 Maintenance Kit, to the O-rings on the
connector side of each probe that is to be installed.
Figure 25
CAUTION: Make sure that there are NO contaminants
between the O-ring and the probe. Contaminants that are present
under the O-ring may cause the O-ring to leak
when the sonde is deployed.
NOTE: Before installing any probe into the sonde bulkhead, be sure that the probe port is free of
moisture. If there is moisture present, you may use a can of compressed air to blow out the remaining
moisture.
LUBRICATE O-RINGS
Conductivity Port
Optical Port
Temperature Sensor