PRO20 USER MANUAL English Français Español Deutsch
Item # 605597 Rev B Drawing # A605597 October 2008 ©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.
CONTENTS Warranty .....................................................................................................1 Introduction................................................................................................2 Getting Started ............................................................................................2 Initial Inspection................................................................................2 Battery Installation...................................................
Calibration ................................................................................................17 Temperature.....................................................................................17 Barometer.........................................................................................17 Dissolved Oxygen.............................................................................18 Salinity Compensation Calibration ................................................
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.
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 (IP67) 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.
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 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.
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 at the bottom of the run screen, and to increase numeric 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 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.
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.
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.
turned on, it will step through language, sensor, and membrane selections; see the First Power On section of this manual for more information. 730.3 mmHg 8.04 95.9 % 24.2 °C 0.0 ppt mg/L SAVE DATA Figure 5, example of main run screen with Save highlighted. NAVIGATION The up and down of the Pro20. arrow keys allow you to navigate through the functions 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.
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 Highlight and press enter compensation value SAVE DATA to adjust salinity Highlight and press enter to save current data to memory Highlight and press enter to view and/or erase saved 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
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 following System Setup functions. The System Setup menu contains multiple screens which are notated as ‘pages’. The current page is indicated on the display, figure 9.
LAST DIGIT SUPPRESSION (LDS) Last Digit Suppression (LDS) can be enabled or disabled by using the up or down arrow keys to highlight it and pressing enter . An ‘X’ in the box next to LDS indicates it is enabled. LDS rounds the DO value to the nearest tenth; i.e. 8.25 mg/L becomes 8.3 mg/L. LDS is automatically disabled during calibrations. 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 .
EMERGENCY CONTRAST ADJUSTMENT If necessary, there is an alternate method of adjusting the contrast. To adjust the contrast, press and hold the menu key, then press the up arrow key to darken the contrast or press the down arrow key to lighten the contrast. SENSOR TYPE L 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, i.e.
MEMBRANE TYPE Membrane Type sets the type of membrane used on the dissolved oxygen sensor; either 1.25 PE (Yellow) or 2.0 PE (blue). Use the up or down arrow keys to to open the membrane submenu. highlight Membrane Type and press enter Highlight the membrane type corresponding to the membrane installed on the sensor and press enter to confirm. The enabled membrane type will have an ‘X’ in the box next to it.
AUTO STABLE Auto Stable utilizes preset values to indicate when a reading is stable. The preset values are adjustable in the System Setup menu. The user can input a % change in dissolved oxygen readings (0.0 to 1.9) over ‘x’ amount of time in seconds (3-19). to expand the submenu. Use the up or Highlight Auto Stable and press enter down arrow keys to highlight the DO% Change or seconds (secs) input field, then press enter to make the highlighted field adjustable.
TEMPERATURE UNITS Highlight Temperature Units and press enter to open a submenu that will allow you to change the temperature units displayed in the run screen. Highlight the desired unit (Celsius or Fahrenheit) and press enter to enable. The enabled temperature 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 Temperature Units submenu.
RESETTING THE SYSTEM SETUP MENU TO FACTORY DEFAULT To reset the Pro20 settings to factory default, press the down arrow key until the Reset - 4 box is highlighted, then press enter. The instrument will ask you to confirm the reset. Highlight Yes and press enter to continue with the reset or highlight No and press enter to cancel the reset. A Factory Reset will not affect data saved in the unit’s memory.
EXITING THE SYSTEM SETUP MENU To exit the System Setup menu, press the down arrow key until the ESC - Exit box is highlighted, then press enter to return to the run screen. CALIBRATION TEMPERATURE All cable assemblies have built-in, temperature sensors. Temperature calibration is not required nor is it available. BAROMETER The barometer in the Pro20 is calibrated at the factory. The barometer reading must be accurate to ensure accurate % calibrations and DO readings.
DISSOLVED OXYGEN The Pro20 can be easily calibrated with the press of one key by enabling One Touch Cal in the System Setup menu and following the One Touch Calibration procedure. Ensure the barometer is reading accurately before performing a One Touch Calibration, DO %, or DO Local% calibration. These calibration procedures use the barometer reading during calibration. If the barometer reading is erroneous during a calibration, your dissolved oxygen values will be inaccurate.
Ensure the barometer reading is accurate. If necessary, perform a barometer calibration. key for 3 seconds. The Pro20 will indicate Press and hold the Calibrate Calibrating %DO on the display and automatically calibrate the sensor to the barometer and salinity correction values. This may take up to 2 minutes depending on the age of the sensor and membrane. You may press the Cal key at this time to cancel the calibration.
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 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.
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. Press enter to confirm the value and calibrate or press the Cal key to cancel the calibration.
TAKING MEASUREMENTS 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.
6.58 95.9 24.2 mg/L % °C Data set 01 saved 729.7 35.0 mmHg ppt SAVE DATA Figure 11, Data set saved The instrument will display ‘Memory Full’ if all 50 data sets have been saved and you attempt to save another data set. VIEWING AND ERASING SAVED DATA – DATA MODE Data mode allows you to view and erase saved data. From the run screen, use the up or down arrow keys to highlight Data and press enter to access 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.
EXITING DATA MODE While in Data mode, press enter to access the bottom functions. Next, highlight the ESC-Exit box and press enter to return to the run screen. PRINCIPLES OF OPERATION The polarographic sensor consists of a silver body as the anode and a circular gold cathode embedded in the end. The galvanic sensor consists of a zinc anode and silver cathode.
CARE, MAINTENANCE, AND STORAGE This section describes the proper procedures for care, maintenance and storage of the sensors. The goal is to maximize their lifetime and minimize down-time associated with improper sensor usage. GENERAL MAINTENANCE GENERAL MAINTENANCE - O-RINGS The instrument utilizes o-rings as seals to prevent water from entering the battery compartment and the sensor ports. Following the recommended procedures will help keep your instrument functioning properly.
L 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 oring or the groove may result. Before re-installing the o-rings, make sure to use a clean workspace, clean hands, and avoid contact with anything that may leave fibers on the o-ring or grooves. Even a very small amount of contamination (hair, grit, etc.) may cause a leak.
GENERAL MAINTENANCE – DO SENSOR PORT It is important that the entire sensor connector end be dry when installing, removing, or replacing. This will prevent water from entering the port. Once a sensor is removed, examine the connector inside the port. If any moisture is present, use compressed air to completely dry the connector or place directly in front of a steady flow of fresh air. If the connector is corroded, contact YSI Technical Support or the Authorized dealer where you purchased the instrument.
Fill a new membrane cap with O2 sensor solution that has been prepared according to the directions on the bottle. Be very careful not to touch the membrane surface. Lightly tap the side of the membrane cap to release bubbles that may be trapped. Thread the membrane cap onto the sensor. It is normal for a small amount of electrolyte to overflow. Replace the sensor guard.
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. Place the sensor tip directly down on the sanding disc and twist it in a circular motion to sand the gold cathode. The goal is to sand off any build-up and to lightly scratch the cathode to provide a larger surface area for the O2 solution under the membrane.
After completing the sanding procedure, repeatedly rinse the electrode with clean water and wipe with lens cleaning tissue to remove any grit left by the sanding disc. Thoroughly rinse the entire tip of the sensor with distilled or deionized water and install a new membrane. L IMPORTANT: Be sure to: (1) Use only the fine sanding discs provided and (2) Sand as mentioned in the above procedures. Not adhering to either of these instructions can damage the electrodes.
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. If white deposits are evident on the anode after cleaning, YSI recommends that you remove this material by sanding the anode with the sandpaper disk included in the membrane kit. Follow the “Mechanical Cleaning” instructions under the Polarographic Silver Anode section.
TROUBLESHOOTING ERROR MESSAGES Symptom Instrument will not calibrate; instrument displays “Calibration Over”, “Calibration Under”, or “Unstable Reading” during calibration. Possible Solution 1) Verify barometer reading 2) Verify correct sensor and membrane type selection in the System Setup menu.
Symptom Possible Solution Instrument readings are inaccurate. 1) Verify correct sensor/membrane type selection in the System Setup menu. 2) Verify calibration, barometer reading, and salinity settings are correct and recalibrate. 3) Verify accurate temperature readings. 4) Sample temperature is over 45 ºC, the temperature compensation range. 5) Probe may not have been in 100% water saturated air during calibration procedure. Moisten sponge in calibration sleeve and recalibrate.
Temperature values display Over or Undr on run screen. 1) Sample temperature is less than -5º C or more than +55oC . Increase or decrease the sample temperature to bring within the allowable range. 2) Return system for service. SPECIFICATIONS Parameter Range Resolution Accuracy Temperature -5 to 55 ºC * 0.1 ºC ± 0.3 ºC 23 to 113 °F 0.1 °F ± 0.6 ºF 0 to 200% air saturation 1% or 0.
ACCESSORIES/PART NUMBERS Part Number Description 6050020 Pro20 60520-1, -4, -10, -20, or -30 1, 4, 10, 20, or 30-meter cable with temperature and a port for Dissolved Oxygen 605202 Galvanic Dissolved Oxygen sensor 605203 Polarographic Dissolved Oxygen sensor 605780 ProBOD, Self-Stirring BOD sensor 603077 Flow cell – For use with any Professional Series Instrument 603056 Flow cell mounting spike 603075 Carrying case, soft-sided 603074 Carrying case, hard-sided 603069 Belt clip 063517 U
DECLARATION OF CONFORMITY Manufacturer: Product Name: YSI Incorporated 1725 Brannum Lane Yellow Springs, Ohio 45387 USA Pro20 Model Numbers: Instrument: Pro20 (6050020) Cables: 60520, 605780 Sensors: 605202, 605203 Conforms to the following: Directives: EMC Directive 2004/108/EC Harmonized Standards: EN5011 :1998, A1:1999 Class B equipment EN61000-4-2 (ESD) EN61000-4-3 (RF radiated immunity) EN61000-4-4 (EFT) EN61000-4-6 (RF conducted immunity) EN61000-4-8 (50 Hz Radiated Susceptibility) FCC Par
RECYCLING 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.
CONTACT INFORMATION ORDERING & TECHNICAL SUPPORT Telephone: (800) 897-4151 (937) 767-7241 Monday through Friday, 8:00 AM to 5:00 PM ET Fax: (937) 767-9353 (orders) (937) 767-1058 (technical support) Email: environmental@ysi.com Mail: YSI Incorporated 1725 Brannum Lane Yellow Springs, OH 45387 USA Internet: www.ysi.
