YSI Model 63 Handheld pH, Conductivity, Salinity and Temperature System Operations Manual
Table of Contents 1. Introduction ............................................................................................................... 1 2. Preparing the Meter................................................................................................... 2 2.1 Unpacking ............................................................................................................................2 2.2 Warranty Card...................................................................................
9. Principles of Operation........................................................................................... 26 9.1 pH.......................................................................................................................................26 9.2 Conductivity.......................................................................................................................27 9.3 Salinity ................................................................................................
1. Introduction The YSI Model 63 Handheld pH, Conductivity, Salinity and Temperature System is a rugged, micro-processor based, digital meter with an attached pH, conductivity and temperature probe. The pH sensor can be easily replaced in the field. The Model 63 has a non-detachable cable available in lengths of 10, 25, 50 or 100 feet (3, 7.6, 15.2 or 30.5 meters). The probe body has been manufactured with stainless steel to add rugged durability and sinking weight.
2. Preparing the Meter 2.1 Unpacking When you unpack your new YSI Model 63 Handheld pH, conductivity, salinity and Temperature System for the first time, check the packing list to make sure you have received everything you should have. If there is anything missing or damaged, call the dealer from whom you purchased the system. If you do not know which of our authorized dealers sold the system to you, call YSI Customer Service at 800-765-4974 or 937-767-7241, and we'll be happy to help you. 2.
You may also want to take the instrument into a dark location and, with the instrument ON, hold down the LIGHT key. The instrument back-light should illuminate the LCD so that the display can be easily read. 2.4 Transport Chamber The Model 63 has a convenient transport chamber built into the instrument’s side. This chamber provides a storage area and protection for the probe while transporting the system in the field. Insert the round sponge (provided with the Model 63) into the bottom of the chamber.
3. Preparing the Probe The YSI Model 63 is shipped without the pH sensor installed. The pH sensor must be installed before using the system (see section 3.1 Installing the pH Sensor, below). The sensor is shipped with a protective bottle filled with a mixture of pH 4 buffer and KCl solution. Do not remove the bottle until you are ready to use the instrument. Save the bottle for long term storage of the probe. 3.1 Installing the pH Sensor A pH sensor is included with the Model 63.
4. Operation The following diagram is an overview of the operation of the Model 63. See the following sections for details of operation.
4.1 Turning The Instrument On With the batteries installed correctly, press the ON/OFF key. The instrument will activate all segments of the display for a few seconds, which will be followed by a self test procedure which will last for several more seconds. The Model 63 will briefly display the cell constant of the conductivity probe when the self test is complete. During this power on self test sequence, the instrument’s microprocessor is verifying that the system is working properly.
For best results: • Calibrate as close as possible to the sample temperature. • After storage in pH 4 buffer/KCl solution, place the pH sensor in pH 7 (6.86) buffer and allow to acclimate before calibrating (5 to 10 minutes). • Always give the pH and temperature sensors enough time to equilibrate with the temperature of the buffer. Temperature sensor pH sensor (covered by sensor guard) Figure 5 4.
5. Press the ENTER key. The Model 63 display will show CAL at the bottom, STAND will stop flashing and the pH calibration value is shown with the middle decimal point flashing. 7.00 STAND CAL pH 24.8 °C Flashes until reading is stable 6. When the reading is stable (does not change by 0.01 pH in 10 seconds), the decimal point will stop flashing. Press and hold the ENTER key to save the calibration point.
.4.01 pH SLOPE CAL 24.8 °C Second buffer value Left decimal flashes (until reading is stable) for buffers lower than first cal point If the second pH buffer is less than the first buffer (which was used to adjust the offset; pH 7 or pH 6.86), the left decimal point will flash as shown above. If the second pH buffer is greater than the first, the right decimal point will flash as shown below. 10.0.0 Second buffer value pH SLOPE CAL 24.
15. If you are performing a 3-point calibration, fill a clean container with the third value pH buffer (pH 4 or 10, or pH 4.01 or 9.18) and immerse the probe into the solution. Make sure that the temperature sensor is immersed. NOTE: The third buffer must not be the same as the second buffer. For example; if the second buffer was less than pH 7, the third buffer must be greater than pH 7. 16. Press the ENTER key.
4.3 Conductivity Calibration IMPORTANT: System calibration is rarely required because of the factory calibration of the YSI Model 63. However, from time to time it is wise to check the system calibration and make adjustments when necessary. Prior to calibration of the YSI Model 63, it is important to remember the following: 1. Always use clean, properly stored, NIST traceable calibration solutions (see 12 Accessories and Replacement Parts).
1000 µS 24.8 CAL °C 9. Use the UP ARROW or DOWN ARROW key to adjust the reading on the display until it matches the value of the calibration solution you are using. 10. Once the display reads the exact value of the calibration solution being used (the instrument will make the appropriate compensation for temperature variation from 25°C), press the ENTER key. The word “SAVE” will flash across the display for a second indicating that the calibration has been accepted.
The Model 63 has six modes: ¾ pH -- Displays pH and temperature (°C). ¾ Conductivity -- A measurement of the conductive material in the liquid sample without regard to temperature. Also displays temperature (°C). ¾ Specific Conductance -- Also known as temperature compensated conductivity which automatically adjusts the reading to a calculated value which would have been read if the sample had been at 25o C (or some other reference temperature which you choose). See section 5 Advanced Conductivity Setup.
3.03 µS 23.8 Flashing °C symbol indicates Specific Conductance °C If the instrument is reading Specific Conductance, the large numbers on the display will be followed by either a µS or an mS. Additionally, the small portion of the display will show the o C flashing on and off. If the instrument is reading Salinity, the large numbers on the display will be followed by a ppt. 32.3 ppt 24.8 4.5 °C Autoranging & Range Searching The YSI Model 63 is an autoranging instrument.
SAVE 01 Site identity While pH, conductivity, specific conductance or salinity is displayed on the screen, press the ENTER key and hold it for approximately 2 seconds. The meter will flash SAVE on the display along with the current site identity (1 through 50) being used. When all 50 sites are full, the display will flash FULL on the screen. This message will remain on the screen (even after power down) until a key is pushed.
7. When you have finished recalling data, press MODE two times to return to normal operation. NOTE: The Model 63 will recall data as a list. When the UP ARROW is pressed the Model 63 will display the Site ID# for the previously recorded data. For example: If you are reviewing Site ID# 5 and the UP ARROW is pressed, the Model 63 will display Site ID#4. If you are reviewing Site ID# 5 and Site ID# 5 was the last set of data stored, the DOWN ARROW key will display Site ID# 1.
4.9 Display Backlight At times it may be necessary to take measurements with the Model 63 in dark or poorly lit areas. To help in this situation, the Model 63 comes equipped with a backlight which will illuminate the display so that it can be easily read. To activate the backlight, press and hold the LIGHT key. The display will remain lit as long as the key is pressed. When you release it, the light goes out to preserve battery life.
5. Advanced Conductivity Setup The default settings of the YSI Model 63 are appropriate for the vast majority of measurement applications. However, some measurement applications require very specific measurement criteria. For that reason, we have made the YSI Model 63 flexible to accommodate these “advanced users.
5.2 Changing The Reference Temperature Follow these steps to modify the reference temperature of the Model 63. 1. Turn the instrument on and wait for it to complete its self test procedure. 2. Use the MODE key to advance the instrument to display conductivity. 3. Press and release both the DOWN ARROW and the MODE keys at the same time. The CAL symbol will appear at the bottom left of the display. The large portion of the display will show 1.91 % (or a value set previously using Advanced Setup). 4.
6. Maintenance 6.1 pH Sensor Precautions 1. When making measurements or performing the calibration procedure, make certain that the level of sample or pH buffer is high enough to cover both the pH and temperature sensors. 2. Rinse the probe with deionized water between changes of calibration buffer solutions. 3. During pH calibration, allow the sensors time to stabilize with regard to temperature (approximately 60 seconds) before proceeding with the calibration protocol.
6.3 pH Sensor Storage For short term storage between measurements in the field (up to one week), place the probe in the transport chamber in the side of the instrument case. Make sure that the sponge inside the chamber is wet (tap water). For long term storage (over one week), place the probe in the storage bottle (provided) containing a mixture of 50% pH 4 buffer and 50% 1.5M KCl. This will assure the fastest possible pH response.
7. Discussion of Measurement Errors 7.1 pH Errors There are two basic types of pH errors. The first type are errors related to limitations of instrument design and tolerances of components. The second type are errors due to basic sensor accuracy tolerances, mainly background signal, linearity, and variations in temperature coefficient. It is unlikely that the actual error in any measurement will be the maximum possible error. Errors • Component and circuitry error: ±0.
Temperature Error = ± 1% maximum The solution temperature error is the product of the temperature coefficient and the temperature offset from 25°C, expressed as a percentage of the reading that would have been obtained at 25°C. The error is not necessarily a linear function of temperature. The statement of error is derived from a 25°C temperature offset and a 3%/°C temperature coefficient.
8. Troubleshooting Error Messages The instrument performs a Power On Self Test each time it is turned on. The following error messages are provided to facilitate troubleshooting. They appear on the LCD when an error is detected. Symptom Possible Cause Action 1. Instrument will not turn on • • • Low battery voltage Batteries installed wrong Meter requires service • • • Replace batteries (pg 2) Check battery polarity (pg 2) Return system for service (pg 29) 2.
Symptom 10. Conductivity/Salinity Display reads “OVEr” Possible Cause • When calibrating: User cell constant cal K is >5.25 When measuring: Conductivity reading is >200 mS Salinity reading is >80 ppt • • • When calibrating, pH level is under range allowed for the buffer value selected. When measuring, pH level is < 0 • User cell constant cal K is <4.9 • • • 11. pH Display reads “undr” 12.
9. Principles of Operation 9.1 pH The YSI Model 63 employs a field replaceable pH sensor for the determination of hydrogen ion concentration. The sensor is a combination electrode consisting of a proton selective glass reservoir filled with buffer at approximately pH 7 and a Ag/AgCl reference electrode which utilizes gelled electrolyte. A silver wire coated with AgCl is immersed in the buffer reservoir.
this assumption. Once the slope and intercept to the plot of pH vs. mv are assigned at the new temperature, the calculation of pH under the new temperature conditions is straightforward, and is automatically carried out by the software. Number of pH Calibration Points When calibrating the YSI Model 63, you have the choice of 1-point 2-point, or 3-point calibration. Perform a 2 or 3 point calibration at least once per day for accurate results.
Because the exact composition of a natural media is usually not known, it is best to report a conductivity at a particular temperature, e.g. 20.2 mS/cm at 14 C. However, in many cases, it is also useful to compensate for the temperature dependence in order to determine at a glance if gross changes are occurring in the ionic content of the medium over time. For this reason, the Model 63 software also allows the user to output conductivity data in either raw or temperature compensated form.
10. Warranty and Repair YSI Model 63 Meters are warranted for two years from date of purchase by the end user against defects in materials and workmanship. YSI Model 63 probes, cables and sensors are warranted for one year from date of purchase by the end user against defects in material and workmanship. Breakage of pH sensors is NOT covered under warranty.
10.1 Cleaning Instructions NOTE: Before they can be serviced, equipment exposed to biological, radioactive, or toxic materials must be cleaned and disinfected. Biological contamination is presumed for any instrument, probe, or other device that has been used with body fluids or tissues, or with waste water. Radioactive contamination is presumed for any instrument, probe or other device that has been used near any radioactive source.
10.2 Packing Instructions 1. Clean and decontaminate items to insure the safety of the handler. 2. Complete and include the Cleaning Certificate. 3. Place the product in a plastic bag to keep out dirt and packing material. 4. Use a large carton, preferably the original, and surround the product completely with packing material. 5. Insure for the replacement value of the product.
11. Required Notice The Federal Communications Commission defines this product as a computing device and requires the following notice: This equipment generates and uses radio frequency energy and if not installed and used properly, may cause interference to radio and television reception. There is no guarantee that interference will not occur in a particular installation.
12. Accessories and Replacement Parts The following parts and accessories are available from YSI or any Franchise Dealer authorized by YSI.
13. Appendix A - Specifications Materials: ABS, Stainless Steel, and other materials Dimensions: Height: 9.5 inches (24.13 cm) Thickness: 2.2 inches (5.6 cm) Width: 3.5 inches max. (8.89 cm) Weight: 1.7 pounds (w/ 10’ cable) (.77 kg) Display: 2.3”W x 1.5”L (5.8 cm W x 3.
Adjustable Temperature Compensation Factor for Conductivity: 0% to 4% pH Response Time: 3 sec for 95% of the change at 25°C Temperature Response Time: 20 sec for 95% of the change Temperature Compensation: Automatic Range: User selected or Autoranging for Conductivity Data Storage: 50 points with ID number.
14. Appendix B - Health and Safety YSI pH 4, 7 & 10 Buffer Solutions: 3821, 3822, 3823 pH 4 Ingredients: ) Potassium Hydrogen Phthalate ) Formaldehyde ) Water pH 7 Ingredients: ) Sodium Phosphate, Dibasic ) Potassium Phosphate, Monobasic ) Water pH 10 Ingredients: ) ) ) ) ) Potassium Borate, Tetra Potassium Carbonate Potassium Hydroxide Sodium (di) Ethylenediamine Tetraacetate Water CAUTION - Avoid inhalation, skin contact, eye contact or ingestion. May affect mucous membranes.
15. Appendix C - pH Buffer Values YSI pH 4, 7 and 10 Buffer Solutions: 3821, 3822, 3823 The following table lists the values of YSI pH buffer solutions at various temperatures. Temperature pH 4 pH 7 pH 10 0°C 5°C 10°C 15°C 20°C 25°C 30°C 35°C 40°C 50°C 60°C 4.01 4.00 4.00 4.00 4.00 4.01 4.01 4.02 4.03 4.06 4.09 7.13 7.10 7.07 7.05 7.02 7.00 6.99 6.98 6.97 6.97 6.98 10.34 10.26 10.19 10.12 10.06 10.00 9.94 9.90 9.85 9.78 9.70 NIST pH 4.01, 6.86 and 9.
16. Appendix D - Temperature Correction Data Conductivity Temperature Correction Data for Typical Solutions A. Potassium Chloride** (KCl) Concentration: 1 x 10-1 mole/liter Concentration: 1 mole/liter °C mS/cm %/°C (to 25°C) °C mS/cm %/°C (to 25°C) 0 5 10 15 20 25 65.10 73.89 82.97 92.33 101.97 111.90 1.67 1.70 1.72 1.75 1.77 1.80 0 5 10 15 20 25 30 35 37.5 40 45 50 7.13 8.22 9.34 10.48 11.65 12.86 14.10 15.38 16.04 16.70 18.05 19.43 1.78 1.80 1.83 1.85 1.88 1.90 1.93 1.96 1.98 1.99 2.02 2.
B. Sodium Chloride* (NaCl) Saturated solutions at all temperatures Concentration: 0.5 mole/liter °C mS/cm %/°C (to 25°C) °C mS/cm %/°C (to 25°C) 0 5 10 15 20 25 30 134.50 155.55 177.90 201.40 225.92 251.30 277.40 1.86 1.91 1.95 1.99 2.02 2.05 2.08 0 5 10 15 20 25 30 35 37.5 40 45 50 25.90 29.64 33.61 37.79 42.14 46.65 51.28 56.01 58.40 60.81 65.65 70.50 1.78 1.82 1.86 1.90 1.93 1.96 1.99 2.01 2.02 2.02 2.04 2.
C. Lithium Chloride* (LiCl) Concentration: 1 x 10-1 mole/liter Concentration: 1 mole/liter °C mS/cm %/°C (to 25°C) °C mS/cm %/°C (to 25°C) 0 5 10 15 20 25 30 35 37.5 40 45 50 39.85 46.01 52.42 59.07 65.97 73.10 80.47 88.08 91.97 95.92 103.99 112.30 1.82 1.85 1.89 1.92 1.95 1.98 2.02 2.05 2.07 2.08 2.11 2.15 0 5 10 15 20 25 30 35 37.5 40 45 50 5.07 5.98 6.87 7.75 8.62 9.50 10.40 11.31 11.78 12.26 13.26 14.30 1.87 1.85 1.85 1.85 1.85 1.86 1.88 1.91 1.92 1.94 1.98 2.
E. Ammonium Chloride* (NH4Cl) Concentration: 1 x 10-1 mole/liter Concentration: 1 mole/liter °C mS/cm %/°C (to 25°C) °C mS/cm %/°C (to 25°C) 0 5 10 15 20 25 64.10 74.36 83.77 92.35 100.10 107.00 1.60 1.53 1.45 1.37 1.29 1.21 0 5 10 15 20 25 30 35 37.5 40 45 50 6.96 7.98 9.09 10.27 11.50 12.78 14.09 15.43 16.10 16.78 18.12 19.45 1.82 1.88 1.93 1.97 2.00 2.03 2.06 2.07 2.08 2.08 2.09 2.
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