Instruction Manual PC 10 Waterproof Hand-held pH/Conductivity/Temperature Meter 68X230401 Rev 5 08/04 Technology Made Easy ... Preface This manual serves to explain the use of the Waterproof PC 10 hand-held meters. It functions as a step by step guide to help you operate the meter and as a handy reference guide. It is written to cover as many anticipated applications of the Waterproof PC 10 meters as possible. If there are doubts in the use of this meter, please do not hesitate to contact the nearest Authorised Distributor. Eutech Instruments/ Oakton Instruments cannot accept any responsibility for damage or malfunction to the meter caused by improper use of the instrument. The information presented in this manual is subject to change without notice as improvements are made, and does not represent a commitment on the part of Eutech Instruments Pte Ltd/ Oakton Instruments. Copyright © 1999 Eutech Instruments Pte Ltd/ Oakton Instruments All rights reserved. Rev 5, 08/04 TABLE OF CONTENTS 1. 2. INTRODUCTION ........................................................................................ 1 DISPLAY AND KEYPAD FUNCTIONS ................................................... 2 2.1. 2.2. 3. DISPLAY................................................................................................. 2 KEYPAD ................................................................................................. 3 PREPARATION ........................................................................................... 4 3.1 3.2 INSERTING THE BATTERIES .................................................................... 4 CONNECTING THE PROBE ....................................................................... 5 4. CALIBRATION............................................................................................ 6 4.1. 4.2. 4.3. 4.4. IMPORTANT INFORMATION ON METER CALIBRATION ............................ 6 PREPARING THE METER FOR CALIBRATION ........................................... 7 TEMPERATURE CALIBRATION ................................................................ 8 PH CALIBRATION ................................................................................. 10 NOTES .................................................................................................................. 11 4.5. 4.6. CONDUCTIVITY CALIBRATION ............................................................. 12 CALIBRATING FOR CONDUCTIVITY: ..................................................... 13 NOTES:................................................................................................................. 14 5. 6. 7. 8. 9. 10. 11. 11.1. 11.2. 12. 13. MEASUREMENT ...................................................................................... 15 HOLD FUNCTION .................................................................................... 16 PROBE CARE AND MAINTENANCE ................................................... 17 TROUBLESHOOTING ............................................................................. 18 ERROR MESSAGES ................................................................................. 19 SPECIFICATIONS................................................................................ 20 ACCESSORIES ..................................................................................... 21 REPLACEMENT METER AND METER ACCESSORIES............................... 21 CALIBRATION SOLUTIONS.................................................................... 23 WARRANTY.......................................................................................... 24 RETURN OF ITEMS ............................................................................ 25 Instruction Manual PC 10 1. INTR ODUCTION Thank you for selecting the Waterproof PC 10 portable meter. The meter is a microprocessorbased instrument that measures pH, conductivity, and temperature with just one probe. This meter has many user-friendly features ­ all of which are completely accessible through the water-resistant membrane keypad. Your meter includes 4 "AAA" batteries and a combination pH / conductivity / temperature probe with 3-meter submersible cable. Please read this manual thoroughly before operating your meter. WATERPROOF pH/ Conductivity/ °C Meter PC 1 0 Ser ies ON OF F HO LD MO DE CA L AS EN TE R ME Figure 1: Waterproof PC 10 portable meter -1- Instruction Manual PC 10 2. D ISPLAY AND K EYPAD FU NCTION S 2.1. · · Display The LCD has a primary and secondary display. The primary display shows the measured pH or conductivity (µS or mS) reading. The secondary display shows the temperature in °C. The display also shows error messages, keypad functions and program functions. See Figure 2. MEASurement mode indicator CALibration indicator CONfirm indicator READY indicator MEAS READY HOLD CAL CON pH µmS pH °C ATC Primary Display HOLD indicator Secondary Display ERRor indicator Buffer indicator ERR pH Temp Automatic Temperature Compensation indicator Probe indicator Low Battery indicator pH calibration mode indicator Temperature calibration mode indicator Figure 2: A full LCD screen -2- Instruction Manual PC 10 2.2. Keypad The large membrane keypad makes the instrument easy to use. Each button, when pressed, has a corresponding graphic indicator on the LCD. See Figure 3. Key ON/OFF Function Powers on and shuts off the meter. The meter powers on in the mode it was shut off in. For example, if you shut the meter off in Conductivity measurement mode, the meter will be in Conductivity measurement mode when you switch the meter on. Freezes the measured reading. To activate, press HOLD while in measurement mode. To release, press HOLD again. Selects the measurement parameter (conductivity or pH). Press MODE to toggle between pH and Conductivity mode. Toggles user between Calibration and Measurement mode. If you were in Conductivity Measurement mode, press CAL/MEAS to enter Conductivity Calibration mode. If you were in pH Measurement mode, press CAL/MEAS to enter pH Calibration mode. NOTE: Temperature calibration is accessible from pH Calibration mode; see pages 10 for instructions. Press to confirm your calibration values in Calibration mode. Scrolls values up and down in Calibration mode. In pH mode, / scrolls through the auto buffer values 4.00, 7.00 and 10.00. In Conductivity and Temperature Calibration mode, / lets you increase or decrease the calibration value. HOLD MODE CAL/MEAS ENTER / Figure 3: Keypad membranes of Waterproof PC 10 -3- Instruction Manual PC 10 3. PR EPARATION 3.1 Inserting the Batteries The meter is packaged with 4 "AAA" alkaline batteries required for operation. To insert the batteries into the meter, follow the procedure outlined below. 1. 2. 3. 4. Use a Philips screwdriver to remove the two screws holding the battery cover. See Figure 6 below. Remove battery cover. Insert batteries. Follow the diagram inside the cover for correct polarity. Replace the battery cover into its original position using the two screws removed earlier. Figure 4: Battery Compartment -4- Instruction Manual PC 10 3.2 Connecting the Probe The Waterproof PC 10 meter uses a special combination pH / Conductivity / Temperature probe. The probe cable has a notched 6-pin connector to attach the probe to the meter. NOTE: Do not substitute other probes or electrodes. For replacement probe, see the "Accessories" section, page 21-23. NOTE: Keep connector dry and clean. Do not touch connector with soiled hands. To connect the pH / Conductivity / Temperature probe: 1. Line up the notch and 6 pins of the meter's connector with the holes in the probe's connector. Push down and screw the metal sleeve to lock the probe connector into place. See Figure 5. 2. To remove probe, unscrew the metal sleeve and slide up the probe connector. While holding onto metal sleeve, pull probe away from the meter. CAUTION: Do not pull on the probe cord or the probe wires might disconnect. Figure 5: Probe Connector -5- Instruction Manual PC 10 4. CA LIBRATION 4.1. Important Information on Meter Calibration When you recalibrate your meter, old pH and conductivity calibration data are replaced on a point by point basis. For example, if you previously calibrated your meter at pH 4.0, 7.0, and 10.0, and you recalibrate at pH 7.0, the meter retains the old calibration data at pH 4.0 and pH 10.0. To completely recalibrate your meter, or when you use a replacement probe, it is best to set the meter to its factory defaults and recalibrate the meter at all points. To reset the meter to its factory defaults: 1. 2. 3. While in Measurement mode, press CAL/MEAS and hold for 3 seconds. The meter will prompt RST in the lower display and CAL in the upper display. See Figure 6. Press ENTER to reset your meter to its factory defaults. If you do not want to erase existing calibration data, press CAL/MEAS to escape this mode. Figure 6: Reset to factory defaults For information on how to calibrate your meter: See Section 4.3 on page 8 for Temperature calibration. See Section 4.4 on pages 10 for pH calibration. See Section 4.5 on pages 12 for conductivity calibration. -6- Instruction Manual PC 10 4.2. Preparing the Meter for Calibration The pH/conductivity/temperature probe included with this meter is designed for use with this meter only. Do not substitute other types of probes or electrodes. For a replacement probe, see the "Accessories" section, page 21. Be sure to remove the protective cap of the pH probe before calibration or measurement. Always immerse the probe beyond the electrode band. Immerse the probe in tap water for 10 minutes before calibrating or taking readings to hydrate the pH electrode surface and minimise drift. Rinse your probe in DI water after use. Storage in electrode storage solution is ideal. Alternatively, pH 4.0 or 7.0 calibration standards can be used for short term storage. Do not reuse buffer solutions after calibration. Contaminants in the solution can affect the calibration, and eventually the accuracy of the measurements. Always remove this protective cap before calibration or measurement Always immerse the electrode beyond this band -7- Instruction Manual PC 10 4.3. Temperature Calibration The built-in temperature sensor included in the probe is factory calibrated. Calibrate your sensor only if you suspect temperature errors may have occurred over a long period of time or if you have a replacement probe. 1. 2. Turn the meter on. Press MODE to select pH Measurement mode. Press the CAL/MEAS key to enter pH calibration mode. The CAL indicator will appear above the primary display. See Figure 10. 3. While in pH calibration mode, press the MODE key to enter temperature calibration mode. The primary display shows the temperature reading with zero offset and the secondary display shows you what the temperature value was initially. See Figure 11. 4. Dip the probe into a solution with known temperature (i.e. a temperature bath). reading to stabilize. 5. Press the or key to set the primary display reading to the correct temperature value. (i.e. the temperature of the temperature bath) See Figure 12. Figure 9: Adjust temperature value Figure 8: Initial temperature value Figure 7: Enter pH Calibration mode Allow sufficient time for the meter's temperature -8- Instruction Manual PC 10 6. Press the ENTER key to confirm temperature calibration. The CON indicator will flash to confirm calibration. See Figure 13. NOTES To exit from Temperature Calibration mode without confirming calibration, DO NOT press ENTER in step 6. Press CAL/MEAS instead. Temperature calibration is restricted to ±5°C from the initial value displayed during calibration (shown in the secondary display). Since temperature readings affect the accuracy of the pH and conductivity measurements, it is strongly recommended to carry out pH and conductivity calibration after a temperature calibration is done. Figure 10: CONFIRM temperature calibration -9- Instruction Manual PC 10 4.4. pH Calibration This instrument is capable of up to 3-point pH calibration to ensure accuracy across the entire pH range of the meter. You can perform 1, 2, or 3 point calibration with standard pH buffers of 4.01, 7.00 and 10.00. We recommend that you perform at least 2-point calibration using standard buffers that covers the expected sample range. You can also perform a 1-point calibration, but make sure that the buffer value is close to the sample value you are measuring. This meter features three pre-programmed pH buffers (pH 4.01, 7.00 and 10.00). The meter automatically recognizes and calibrates to these standard buffer values, which makes pH calibration faster and easier. Calibrating for pH: 1. 2. If necessary, press the MODE key to select pH mode. The pH indicator appears in the upper right hand corner of the display. Rinse the probe thoroughly with DI water or a rinse ...