YSI Pro20 User Manual
PRO20
USER MANUAL
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Item # 605597
Drawing # A605597
©2008 YSI Incorporated.
The YSI logo is a registered trademark of YSI Incorporated.
Teflon is a registered trademark of E. I. du Pont de Nemours and Company.
Rev B
October 2008
CONTENTS
Warranty .....................................................................................................1
Introduction................................................................................................2
Getting Started ............................................................................................2
Initial Inspection................................................................................2
Battery Installation.............................................................................2
Keypad................................................................................................3
Connecting the Sensor and Cable.....................................................4
Membrane Installation ......................................................................7
Backlight.............................................................................................7
Powering Off ......................................................................................7
Run Screen .........................................................................................7
Navigation ..........................................................................................8
First Power On ...................................................................................9
System Setup Menu ..................................................................................10
DO Local%.......................................................................................10
Last Digit Suppression (LDS)..........................................................11
One Touch Calibration (One Touch Cal)......................................11
Audio ................................................................................................11
Contrast............................................................................................11
Sensor Type ......................................................................................12
Membrane Type...............................................................................13
Auto Stable .......................................................................................14
DO Units ..........................................................................................14
Temperature Units...........................................................................15
Pressure Units ..................................................................................15
Language...........................................................................................15
Auto Shutoff.....................................................................................15
Resetting the System Setup Menu to Factory Default ...................16
Exiting the System Setup Menu ......................................................17
Calibration ................................................................................................17
Temperature.....................................................................................17
Barometer.........................................................................................17
Dissolved Oxygen.............................................................................18
Salinity Compensation Calibration ................................................21
Taking Measurements ..............................................................................22
Saving and Viewing data...........................................................................22
Saving Data.......................................................................................22
Viewing and Erasing Saved Data – Data mode ..............................23
Principles of Operation ............................................................................25
Care, Maintenance, and Storage ..............................................................26
General Maintenance.......................................................................26
Sensor Maintenance.........................................................................28
Sensor Storage..................................................................................32
Troubleshooting........................................................................................33
Specifications.............................................................................................35
Accessories/Part Numbers........................................................................36
Declaration of Conformity.......................................................................37
Recycling....................................................................................................38
Contact Information.................................................................................39
Ordering & Technical Support........................................................39
Service Information .........................................................................39
WARRANTY
The YSI Pro20 Instrument is warranted for three (3) years from date of purchase by the end
user against defects in materials and workmanship, exclusive of batteries and any damaged
caused by defective batteries. Pro20 cables are warranted for two (2) years from date of
purchase by the end user against defects in material and workmanship. Pro20 Polarographic
sensors are warranted for one (1) year and Galvanic sensors are warranted for six (6)
months from date of purchase by the end user against defects in material and workmanship.
Pro20 instruments, cables & probes are warranted for 90 days from date of purchase by the
end user against defects in material and workmanship when purchased by rental agencies
for rental purposes. Within the warranty period, YSI will repair or replace, at its sole
discretion, free of charge, any product that YSI determines to be covered by this warranty.
To exercise this warranty, call your local YSI representative, or contact YSI Customer
Service in Yellow Springs, Ohio at +1 937 767-7241, 800-897-4151 or visit www.ysi.com
(Support tab). Send the product and proof of purchase, transportation prepaid, to the
Authorized Service Center selected by YSI. Repair or replacement will be made and the
product returned, transportation prepaid. Repaired or replaced products are warranted for
the balance of the original warranty period, or at least 90 days from date of repair or
replacement.
LIMITATION OF WARRANTY
This Warranty does not apply to any YSI product damage or failure caused by:
1) failure to install, operate or use the product in accordance with YSI's written
instructions;
2) abuse or misuse of the product;
3) failure to maintain the product in accordance with YSI's written instructions
or standard industry procedure;
4) any improper repairs to the product;
5) use by you of defective or improper components or parts in servicing or
repairing the product;
6) modification of the product in any way not expressly authorized by YSI.
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR
IMPLIED, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR
A PARTICULAR PURPOSE. YSI's LIABILITY UNDER THIS WARRANTY IS LIMITED
TO REPAIR OR REPLACEMENT OF THE PRODUCT, AND THIS SHALL BE YOUR
SOLE AND EXCLUSIVE REMEDY FOR ANY DEFECTIVE PRODUCT COVERED BY
THIS WARRANTY. IN NO EVENT SHALL YSI BE LIABLE FOR ANY SPECIAL,
INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM ANY
DEFECTIVE PRODUCT COVERED BY THIS WARRANTY.
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INTRODUCTION
Thank you for purchasing the YSI Pro20, an instrument from the YSI Professional
Series product family. The Pro20 features an impact resistant and waterproof (IP-
67) case, backlit display, user-selectable sensor options, internal barometer, and a
rugged, rubber over-mold case.
The Pro20 provides valuable instructions and prompts near the bottom of the
display that will guide you through operation and use. However, reading the
entire manual is recommended for a better understanding of the Pro20’s features.
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The Pro20 can not communicate to a PC via a Pro Plus
communications saddle. Connecting the Pro20 to a
communication saddle may cause erratic instrument behavior.
GETTING STARTED
INITIAL INSPECTION
Carefully unpack the instrument and accessories and inspect for damage.
Compare received parts with materials listed on the packing list. If any parts or
materials are missing or damaged, contact YSI Customer Service at 800-897-4151
(+1-937-767-7241) or the Authorized YSI distributor from whom the instrument
was purchased.
BATTERY INSTALLATION
This instrument requires 2 alkaline C-cell batteries. Under normal conditions,
battery life is approximately 400 hours at room temperature without using the
back light. A battery symbol
display to indicate low batteries when approximately 1 hour of battery life
remains.
will blink in the lower, left corner of the
To install or replace the batteries:
1) Turn the instrument off and flip over to view the battery cover on the back.
2) Unscrew the four captive battery cover screws.
3) Remove the battery cover, and remove the old batteries if necessary.
4) Install the new batteries, ensuring correct polarity alignment (Figure 1).
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5) Place the battery cover on the back of the instrument and tighten the four
screws. Do NOT over-tighten.
Figure 1, Pro20 with battery cover removed. Note battery symbols indicating
polarities.
The waterproof instrument case is sealed at the factory and is not to
be opened, except by authorized service technicians. Do not
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KEYPAD
attempt to separate the two halves of the instrument case as this
may damage the instrument, break the waterproof seal, and will
void the warranty.
2
1
3
4
5
6
Figure 2, keypad
3
Number Key Description
1
Press and hold for 3 seconds to calibrate.
Opens Calibrate menu from the run screen if One
2
Use to navigate through menus, to navigate through
box options at the bottom of the run screen, and to
3
Press once to turn instrument on. Press a second
time to turn backlight on. Press a third time to turn
backlight off. Press and hold for 3 seconds to turn
4
Use to enter the System Setup menu from the run
5
Initiates One Touch Calibration.
Touch Calibration is disabled.
increase numeric inputs.
Press to confirm entries and selections.
Calibrate
Up Arrow
Power and Backlight
instrument off.
Menu
screen.
Enter
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Use to navigate through menus, to navigate through
box options at the bottom of the run screen, and to
CONNECTING THE SENSOR AND CABLE
CONNECTING THE SENSOR
“Sensor” refers to the removable portion or electrode sensing portion of the cable
assembly, i.e. the dissolved oxygen sensor. “Bulkhead” refers to the portion of the
cable with the single-pin connector (Figure 3).
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Down Arrow
decrease numeric inputs.
The Pro20 has two compatible sensors for use with a field cable:
Polarographic – This sensor has a black sensor body and is engraved with the
model number 2003. Polarographic will be abbreviated Polaro in the instrument.
Galvanic – This sensor has a grey sensor body and is engraved with the model
number 2002.
For information about the differences on the two sensor types, see Sensor Type in
the System Setup menu section and/or the Principles of Operation section of this
manual.
If using a ProBOD sensor/cable assembly, there is no need to install a sensor
because it has a built in Polarographic dissolved oxygen sensor.
Before installing either sensor or connecting the cable to the
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instrument, the Sensor Type must be configured for the sensor being
installed/connected. Failure to do this may result in damage not
covered under warranty. The instrument will step you through this
setup the first time it is powered on. See the System Setup menu
section of this manual for instructions on configuring the Sensor
Type after the first power on.
1) Ensure both the sensor connector and sensor port on the cable are clean and
dry.
2) Grasp the sensor with one hand and the cable bulkhead in the other.
3) Push the sensor into the connector on the cable until it is firmly seated and
only 1 o-ring is visible. Failure to properly seat the sensor may result in
damage.
4) Twist the sensor clockwise to engage threads and finger tighten. Do NOT
use a tool. This connection is water-tight.
For more detailed instructions, please refer to the sensor installation sheet that is
included with each sensor.
Bulkhead
Figure 3
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Sensor
CONNECTING THE CABLE
The Pro20 is designed for field and laboratory use. It is compatible with two
different cable options:
1) The field rugged cable is available in standard lengths of 1, 4, 10, 20, 30, and
100 meters with special lengths available between 30 and 100 meters. This
cable has a built in temperature sensor and includes a port for the dissolved
oxygen sensor.
2) The ProBOD is a 1 meter probe/cable assembly with built in Polarographic
dissolved oxygen and temperature sensors. It has an AC powered motor for
sample stirring and is designed to fit into a 300 ml BOD bottle.
To connect the cable, align the keys in the cable connector to the slots in the
instrument connector. Push together firmly and then twist the outer ring until it
locks into place (Figure 4). This connection is water-proof.
When disconnected, the sensor and cable’s sensor connectors are
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NOT water-proof. Do not submerge the cable without a sensor
installed. When disconnected, the cable’s instrument connector and
the connector on the instrument maintain a waterproof, IP-67
Figure 4, Note the keyed connector.
rating.
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MEMBRANE INSTALLATION
The dissolved oxygen sensor is shipped with a dry, protective red cap that will need
to be removed before using. It is very important to put a new membrane with
electrolyte solution on the sensor after removing the red cap.
Prepare the membrane solution according to the instructions on the bottle. After
mixing, allow the solution to sit for 1 hour. This will help prevent air bubbles
from later developing under the membrane. Ensure you are using the correct
electrolyte solution for the correct sensor. Galvanic sensors utilize electrolyte with
a light blue label and Polarographic sensors utilize electrolyte with a white label.
The Dissolved Oxygen sensor is supplied with cap membranes specific to the
sensor type ordered (Polarographic or Galvanic). 5913 and 5914 membrane kits
are for Galvanic sensors and the 5908 and 5909 membrane kits are for
Polarographic sensors.
Remove and discard or save the red protective cap. Thoroughly rinse the sensor tip
with distilled or deionized water. Fill the cap membrane 3⁄4 full of electrolyte
solution, then tap the cap with a finger to release any trapped air. Be careful not to
touch the membrane portion of the cap. Thread the membrane cap onto the
sensor, moderately tight. Do not use a tool. It’s typical for some of the electrolyte
solution to spill over. It is best to allow the new cap to remain on a new sensor
overnight before trying to calibrate. For detailed instructions on changing a
membrane cap, see the Care, Maintenance, and Storage section of this manual.
BACKLIGHT
Once the instrument is on, pressing power/backlight key will turn on the
display backlight. The backlight will remain on until the key is pressed again or
after two minutes of not pressing any key on the keypad.
POWERING OFF
To turn the instrument off, press and hold the power/backlight key for three
seconds.
RUN SCREEN
Press the power/backlight key to turn the instrument on. The instrument will
run through a self test and briefly display a splash screen with system information
before displaying the main run screen (Figure 5). The first time the Pro20 is
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turned on, it will step through language, sensor, and membrane selections; see the
First Power On section of this manual for more information.
8.04 mg/L
95.9 %
Figure 5, example of main run screen with Save highlighted.
NAVIGATION
The up and down arrow keys allow you to navigate through the functions
of the Pro20.
NAVIGATING IN THE RUN SCREEN
When in the run screen, the up and down arrow keys will move the
highlighted box along the bottom options. Once a box is highlighted, press enter
to access the highlighted option.
730.3
mmHg
24.2 °C
0.0
ppt
SAVE
DATA
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Description of run screen box functions from left to right:
Option Description
Barometer reading Highlight and press enter to calibrate the barometer
Salinity compensation
value
SAVE
DATA
NAVIGATING IN THE SYSTEM SETUP MENU
When in the System Setup menu, the up and down arrow keys will move the
highlighted bar up and down the system setup options. See the System Setup
menu section of this manual for more information about these options.
FIRST POWER ON
The instrument will step through an initial configuration when powered on for the
first time. This will set the language, sensor, and membrane options. Use the up
or down arrow keys to highlight the appropriate language, sensor, and membrane,
then press enter to confirm (Figures 6, 7, and 8). The Sensor Type must be
configured for the sensor installed. Failure to do this may result in damage not
covered under warranty. If an incorrect option is selected, it may be changed in
the System Setup menu.
Select Language:
English
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Français
Español
Deutsch
Use ST to select
Language
Press to confirm
Figure 6, Language selection
Highlight and press enter to adjust salinity
compensation value
Highlight and press enter to save current data to
memory
Highlight and press enter to view and/or erase saved
data
Select Sensor Type:
Polaro (black)
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Galvanic (grey)
Use ST to select
sensor type
Press to confirm
Figure 7, Sensor selection
Select Membrane
Type:
71.25 (Yellow)
2.0 (Blue)
Use ST to select
membrane
Press to confirm
Figure 8, Membrane selection
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