User Manual DOCUMENT #605597 Pro20 Pro20i USE R M A NUA L E ngl i s h
Item #605597 Rev C, September 2016 For the latest version of this manual, visit ysi.com ©2016 YSI Incorporated. The YSI logo is a registered trademarks of YSI Incorporated.
CONTENTS Warranty................................................................................................. i Introduction..........................................................................................1 Getting Started.....................................................................................1 Initial Inspection......................................................................1 Battery Installation..................................................................1 Key Pad....
Calibration ..........................................................................................17 Temperature..........................................................................17 Barometer..............................................................................17 Dissolved Oxygen.................................................................17 Salinity Compensation Calibration......................................21 Taking Measurements....................................................
WARR ANT Y The YSI Pro20/Pro20i 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 damage caused by defective batteries. Pro20/Pro20i cables are warranted for two (2) years from date of purchase by the end user against defects in material and workmanship.
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.
INTRODUCTION Thank you for purchasing the YSI Pro20/Pro20i, an instrument from the YSI Professional Series product family. The Pro20 features user-replaceable cables, while the Pro20i features an integral (i.e. built-in) cable. Sensors are user-replaceable on Pro20 and Pro20i cables. The Pro20/Pro20i features an impact resistant and waterproof (IP67) case, backlit display, user-selectable sensor options, internal barometer, and a rugged, rubber over-mold case.
3. Remove the battery cover and remove the old batteries if necessary. 4. Install the new batteries, ensuring correct polarity alignment (figure 1). 5. Place the battery cover on the back of the instrument and tighten the four screws. Do not over-tighten. Figure 1. Pro20/Pro20i with battery cover removed. Notice battery symbols indicating polarities. The waterproof instrument case is sealed at the factory and is not to be opened, except by factory-authorized service technicians.
Number Key Description 1 Calibrate Press and hold for 3 seconds to calibrate. Initiates One Touch Calibration. Opens Calibrate menu from the run screen if One Touch Calibration is disabled. 2 Up Arrow Use to navigate through menus, to navigate through box options along the bottom of the Run screen, and to increase numerical inputs. 3 Power and Backlight Press once to turn instrument on. Press a second time to turn backlight on. Press a third time to turn backlight off.
The Pro20/Pro20i 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’s menu. 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.
Connecting the Cable (Pro20 Only) 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.
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.
BACKLIGHT Once the instrument is powered on, pressing the 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. NAVIGATION The up and down arrow keys allow you to navigate through the functions of the Pro20/Pro20i.
Navigating 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.
After selecting a language, sensor, and membrane, the run screen will appear. The next time the instrument is powered up the run screen will appear immediately after the self check. If the sensor type or membrane type is changed, ensure that it updated in the System Setup menu. SYSTEM SETUP MENU Press the menu key to access the System Setup menu. The System Setup menu contains three screens notated as ‘pages’. The current page is indicated near the bottom of the display (figure 9).
Example: 750/760 = 0.9868 x 100 = 98.68% calibration value when DO Local is disabled. When DO Local% is enabled, the Pro20/Pro20i corrects for barometric pressure for each DO measurement instead of during calibration. Example: Instrument #1 with DO Local% enabled: At 737 mmHg barometric pressure, roughly 841 ft above sea level, the instrument would calibrate to 100%.
ONE TOUCH CALIBRATION (ONE TOUCH CAL) One Touch Calibration can be enabled or disabled by using the up or down arrow keys to highlight One Touch Cal and pressing enter . An ‘X’ in the box next to One Touch indicates it is enabled. When One Touch Cal is enabled, press and hold the calibration key for 3 seconds while in the run screen to calibrate Dissolved Oxygen to the barometer reading and salinity correction value. For more information on One Touch Calibration, see the Calibration section of this manual.
SENSOR TYPE i The instrument’s Sensor Type must be configured for the sensor installed. Failure to do this may result in damage not covered under warranty. If you observe readings very close to 0 or extremely high readings, e.g. 600%, your Sensor Type setting may be set incorrectly. Sensor Type sets the type of dissolved oxygen sensor being used; either polarographic (black) or galvanic (grey). Use the up or down arrow keys to highlight Sensor Type, then press enter to open a submenu.
enabled membrane type will have an ‘X’ in the box next to it. Use the down arrow key to highlight the ESC – Exit box and press enter to save changes and to close the membrane submenu. The dissolved oxygen sensor is supplied with membranes specific to the sensor type and are color coded as described in the following tables. Galvanic Membrane Kits: Model Color 5913 Material Description Yellow 1.25 mil Faster response time and less flow polyethylene (PE) dependence than traditional FEP membranes.
any changes, highlight the ESC-Exit box and press enter to close the Auto Stable submenu. To disable Auto Stable, set the DO% Change input to 0.0. When Auto Stable is enabled, an AS symbol will display next to the dissolved oxygen value on the run screen and blink during stabilization. When the dissolved oxygen value has stabilized based on the Auto Stable settings, the AS will display steadily and the instrument will beep twice if Audio is turned on.
PRESSURE UNITS Highlight Pressure Units and press enter to open a submenu that allows you to change the barometric pressure units displayed on the Run screen. Highlight the desired unit (mmHg, inHg, mbar, psi, or kPa) and press enter to enable. The enabled pressure unit will have an ‘X’ in the box next to it. Only one unit may be enabled at a time. Highlight the ESC-Exit box and press enter to save any changes and to close the Pressure Units submenu.
Parameter Reset Defaults Temperature Units o Dissolved Oxygen Units C mg/L and % Pressure Units mmHg Dissolved Oxygen Sensor Type Last Setting Confirmed Membrane Type Last Setting Confirmed Salinity Compensation Value 0.0 ppt DO Local% Off One Touch Cal On Display Contrast Set to mid range Auto Shutoff 30 minutes Auto Stable Off (0.
C A L I B R AT I O N TEMPERATURE All cable assemblies have built-in, temperature sensors. Temperature calibration is not required nor is it available. BAROMETER The barometer in the Pro20/Pro20i is calibrated at the factory. The barometer reading must be accurate to ensure accurate % calibrations and DO readings. If your barometer requires an adjustment, use the up or down arrow keys to highlight the barometer box on the run screen, then press enter .
i It is not necessary to calibrate in both % and mg/L or ppm. Calibrating in % will simultaneously calibrate mg/L and ppm and vice versa. YSI recommends calibrating dissolved oxygen in % for both ease and accuracy. ONE TOUCH CALIBRATION Perform this calibration procedure when One Touch Cal is enabled in the System Setup menu. If using a field cable, install the sensor guard onto the probe.
Calibration Successful will display for a few seconds to indicate a successful calibration and then the instrument will return to the run screen. If the calibration is unsuccessful, an error message will display on the screen. Press the Cal key to exit the calibration error message and return to the run screen. See the Troubleshooting guide for possible solutions. Calibrating in Percent (DO%) Perform this calibration procedure when One Touch Cal is disabled in the System Setup menu.
Calibrating in Percent (DO Local% Enabled) Perform this calibration procedure when DO Local% is enabled in the System Setup menu. Prepare a 100% humid environment for the sensor as described in the One Touch Calibration section. Power the instrument on and wait approximately 5 to 15 minutes for the storage chamber to become completely saturated and to allow the sensor to stabilize if using a Polarographic sensor.
of at least ½ foot per second (16 cm per second) during the entire calibration process. A stir plate may be helpful in this calibration. Allow the dissolved oxygen and temperature readings to stabilize. This may take 5 to 15 minutes, depending on the age of the instrument, type of sensor, and condition of the sensor. Press the Calibrate key. Highlight mg/L and press enter . Use the up and down arrow keys to adjust the mg/L reading to the value of the titrated sample.
Figure 10, Salinity box highlighted TA K I N G M E A S U R E M E N T S Before taking measurements, be sure the instrument has been calibrated to ensure the most accurate readings. Turn the instrument on and wait 5-15 minutes if using a polarographic sensor. If using a field cable/sensor, install the sensor guard to protect the sensor and membrane. Place the probe in the sample to be measured and give the probe a quick shake to release any air bubbles. Allow the temperature readings to stabilize.
S AV I N G A N D V I E W I N G D ATA The Pro20/Pro20i can store 50 data sets in non-volatile memory for later viewing. A data set includes the values currently on the display, i.e. temperature in Celsius or Fahrenheit and dissolved oxygen in % and/or mg/L or ppm. Each data point is referenced with a data set number, 01 through 50. i The Pro20/Pro20i can not communicate to a PC via a Pro Plus communications saddle. Connecting the Pro20/Pro20i to a communication saddle may cause erratic instrument behavior.
Figure 12, Data mode. Viewing Data Once in data mode, use the up and down arrow keys to view saved data sets in sequential order or press enter to access the bottom functions. After accessing the bottom functions, highlight the Data box and press enter to regain access to viewing data. The data set that is displayed will be indicated by the data set number, 01 through 50. Erasing Data While viewing saved data, press the enter key to access the function boxes at the bottom of the display.
Select ESC-Exit and press enter to exit erase mode without erasing any data. Select Erase Data Set and press enter to erase the data set that was displayed before entering erase mode. For example, if data set 12 was displayed before entering erase mode, and Erase Data Set is selected, Data Set 12 will be erased from memory and the sets AFTER that number will move up to keep them sequential. So, if there were 15 records and number 12 is erased then 13 becomes 12, 14 becomes 13, and 15 becomes 14.
zero. Hence, the amount of oxygen diffusing through the membrane is proportional to the absolute pressure of oxygen outside the membrane. If the oxygen pressure increases, more oxygen diffuses through the membrane and more current flows through the sensor. A lower pressure results in less current. CARE, MAINTENANCE AND STOR AGE This section describes the proper procedures for care, maintenance and storage of the sensors.
equivalent lint-free cloth. Alcohol can be used to clean the plastic parts, but use only water and mild detergent on the o-ring itself. Also, inspect the o-rings for nicks and imperfections. i Using alcohol on o-rings may cause a loss of elasticity and may promote cracking. Do not use a sharp object to remove the o-rings. Damage to the o-ring or the groove may result.
air. If the connector is corroded, contact YSI Technical Support or the Authorized dealer where you purchased the instrument. i Remove sensors upside down (facing the ground) to help prevent water from entering the port upon removal. SENSOR MAINTENANCE Sensor Maintenance - Temperature You must keep the temperature portion of the sensor free of build up. Other than that, the sensor requires no maintenance. A toothbrush can be used to scrub the temperature sensor if needed.
Thread the membrane cap onto the sensor. It is normal for a small amount of electrolyte to overflow. Replace the sensor guard. Polarographic Sensors – Model # 605203 The KCl (potassium chloride) solution and the membrane cap should be changed at least once every 30 days during regular use.
To clean and resurface the sensor, follow the instructions below. Gold Cathode For correct sensor operation, the gold cathode must be textured properly. It can become tarnished or plated with silver after extended use. Never use chemicals or abrasives that have not been recommended or supplied by YSI. First dry the sensor tip completely with lens cleaning tissue. Wet a sanding disc and place it face up in the palm of you hand. Next, with your free hand, hold the sensor in a vertical position, tip down.
Mechanical cleaning: In order to sand the silver anode along the shaft of the sensor, simply hold the sensor in a vertical position. Wet the sanding disc and gently wrap it around the sensor and twist it a few times to lightly sand the anode (the goal is to simply sand off any build-up without scratching or removing layers of the anode itself). Usually, 3 to 4 twists of the sanding disc are sufficient to remove deposits.
i The Galvanic DO sensor solution will appear milky white after use but will NOT affect the accuracy of the sensor unless there is excessive build up. The color change is acceptable and normal as long as DO readings remain stable. At the time the membrane cap is changed, YSI recommends that you rinse the anode (silver shaft of the sensor) with purified water and wipe with a clean paper towel.
to air dry completely. Use a clean, dry new membrane cap to screw over the sensor to keep it dry and to protect the anode and cathode. After storing the sensor for a long period of time it is necessary to “condition” the sensor by putting a new membrane with electrolyte solution on the sensor. Long Term Storage Temperature: -5 to 70°C (23 to 158°F) TROUBLESHOOTING Symptom Instrument will not calibrate; instrument displays “Calibration Over”, “Calibration Under”, or “Unstable Reading” during calibration.
Symptom Instrument readings are inaccurate. Possible Solution 1. 2. 3. 4. 5. 6. 7. 8. Dissolved Oxygen 1. values display Over or Undr on run screen. 2. 3. 4. 5. 6. 7. 8. Temperature values display Over or Undr on run screen. 1. 2. Verify correct sensor/membrane type selection in the System Setup menu. Verify calibration, barometer reading, and salinity settings are correct and recalibrate. Verify accurate temperature readings. Sample temperature is over 45 ºC, the temperature compensation range.
S P E C I F I C AT I O N S These specifications represent typical performance and are subject to change without notice. For the latest product specification information, please visit YSI’s website at ysi.com or contact YSI Tech Support. Parameter Temperature Dissolved Oxygen Barometer Range Resolution Accuracy -5 to 55°C* 0.1°C ± 0.3°C 23 to 113 °F 0.1 °F ± 0.6 ºF 0 to 200% air saturation 1% or 0.
Part Number Description 607125 Pro20i instrument with integral (i.e. built-in) 4-meter cable. Polarographic DO sensor included.
D E C L A R AT I O N O F C O N F O R M I T Y The undersigned hereby declares on behalf of the named manufacturer under our sole responsibility that the listed product conforms to the requirements for the listed European Council Directive(s) and carries the CE mark accordingly.
REC YCLING YSI takes seriously the commitment to reducing our environmental footprint in our course of doing business. Even though materials reduction is the ultimate goal, we know there must be a concerted effort to responsibly deal with materials after they’ve served a long, productive life-cycle. YSI’s recycling program ensures that old equipment is processed in an environmentally friendly way, reducing the amount of materials going to landfills.
C O N TA C T I N F O R M AT I O N ORDERING AND TECHNICAL SUPPORT Telephone: 800 897 4151 (USA) +1 937 767 7241 (Globally) Monday through Friday, 8:00 AM to 5:00 ET Fax: +1 937 767 9353 (orders) +1 937 767 1058 (technical support) Email: info@ysi.com Mail: YSI Incorporated 1725 Brannum Lane Yellow Springs, OH 45387 USA Internet: ysi.com When placing an order please have the following available: 1.) YSI account number (if available) 2.
Item # 605597 Rev C September 2016 ©2016 YSI Incorporated.
