Instruction Manual pH 209-209R Bench-top pH Meter http://www.hannainst.com This Instrument is in Compliance with the CE Directives Dear Customer, Thank you for choosing a Hanna Instruments Product. Please read this instruction manual carefully before using the instrument. This manual will provide you with all the necessary information for the correct use of the instrument, as well as a precise idea of its versatility in a wide range of applications. This instrument is in compliance with directives. PRELIMINARY EXAMINATION Remove the instrument from the packing material and examine it carefully to make sure that no damage has occurred during shipping. If there is any damage, notify your dealer. Each meter is supplied complete with: · HI 1332B plastic-body combination double-junction refillable pH electrode with BNC connector and 1m (3.3') cable; · Instruction Manual; · 12VDC adapter (HI710005 or HI710006); · Dust cover. Note: Save all packing material until you are sure that the instrument functions correctly. All defective items must be returned in the original packing with the supplied accessories. TABLE OF CONTENTS PRELIMINARY EXAMINATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 FUNCTIONAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 OPERATIONAL GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 PH CALIBRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 PH VALUES AT VARIOUS TEMPERATURES . . . . . . . . . . . . . . . . . . . .10 ELECTRODE CONDITIONING & MAINTENANCE . . . . . . . . . . . . . . . . . 11 TEMPERATURE-RESISTANCE CORRELATION FOR HANNA pH SENSITIVE GLASS . . . . . . . . . . . . . . . . . . . . . . . . 14 ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 ELECTRODE APPLICATION REFERENCE GUIDE . . . . . . . . . . . . . . . . . 21 WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 CE DECLARATION OF CONFORMITY . . . . . . . . . . . . . . . . . . . . . . . . 23 GENERAL DESCRIPTION pH 209 bench-top pH meter is designed for simplicity of use. It features a large easy-to-read liquid crystal display (LCD) and user friendly keyboard. The pH calibration is made simple through the easy-to-operate front panel knobs for offset and slope adjustment. A front knob is provided for easy manual temperature compensation of the pH reading. pH 209 can also measure ion concentration (ISE) and ORP (Oxidation Reduction Potential) in the mV range. The range selection (pH, mV or C for temperature compensation) is made simple through the front membrane keyboard. The large LCD is provided with arrows that quickly and clearly indicate the selected range. It is also available the model pH209R with recorder output feature. 2 3 FUNCTIONAL DESCRIPTION Range Resolution Accuracy (@20°C/68°F) SPECIFICATIONS pH mV pH mV pH mV pH mV 0.00 to 14.00 ±1999 0.01 1 ±0.01 ±1 ±0.03 ±2 Manual, at 2 points through offset and slope knobs Manual from 0 to 100 C (32 to 212 F) HI 1332B plastic body, combination, double junction refillable pH electrode with BNC and 1m (3.3') cable 0 to 5V 0 to 14 -1999 to +1999 always 0 1012 ohm 12 VDC adapter (HI710005 or HI710006 included) 0 to 50 C (32 to 122 F); 0-95% RH not condensing 240x182x74 mm (9.4x7.1x2.9") approx. 1.0 Kg (2.3 lb.) Typical EMC Deviation Calibration Temperature Compensation Electrode (included) Analog output (PH09R only) Input Impedance Power pH mV temp. 1) Liquid Crystal Display (LCD) 2) pH slope adjustment knob 3) pH offset adjustment knob 4) pH range selection key 5) mV range selection key 6) C range selection key 7) Temperature setting knob 8) ON/OFF switch 9) Power adapter socket 10) BNC electrode connector 11) Electrode reference socket 12) Analog output (PH209R only) Environment Dimensions Weight 4 5 OPERATIONAL GUIDE Power connection Plug the 12VDC adapter (HI710005 or HI710006) into the power supply socket (#9 on page 4). Note: make sure the main line is protected by a fuse. Electrode connection For combination pH or ORP electrodes (with internal reference) connect the electrode's BNC to the socket provided (#10 on page 4). For an electrode with a separate reference, connect the measuring electrode's BNC to the BNC socket (#10 on page 4) and the reference electrode's jack to the socket provided (#11 on page 4). Note: to prevent damage to the electrode, remove the pH electrode from the solution before turning the meter off. If the meter is OFF, detach the electrode from the meter before immersing the electrode in the storage solution. · Press the pH key to display the pH measurement. · The display shows the pH value of the test solution compensated for temperature. If measurements are taken in different samples successively, it is recommended that the electrode be rinsed thoroughly for better conditioning and to eliminate cross-contamination of the sample. For the rinsing process, it is recommended to use a liberal amount of the next solution to be measured. TAKING ORP MEASUREMENTS pH 209 has the capability to take ORP measurements, using an ORP electrode. Hanna Instruments offers a variety of ORP electrodes for this purpose (see accessories). Contact your Dealer for more information. · Connect the ORP electrode to the meter and submerge the tip (4 cm / 1½") into the sample to be tested. Note: ORP measurements are taken without temperature compensation. 4 cm (1½") TAKING pH MEASUREMENTS Make sure that the instrument has been calibrated for pH before taking pH measurements. · Switch the instrument on by pressing the ON/OFF switch. · Immerse the electrode tip (4 cm/1½") into the sample and shake briefly. · Press the mV key to enter the mV mode. Allow a few minutes for the reading to stabilize. · The display will indicate the mV value (positive or negative). 4 cm (1½") · Take the temperature of the solution with a ChecktempC or a glass thermometer (e.g.25 C). · Press the C key to display temperature setting on the LCD and adjust the temperature knob to display the temperature of the sample. AFTER MEASUREMENTS · Press the ON/OFF switch again to switch the instrument off. 6 7 p H CALIBRATION IMPORTANT The instrument's pH range should be re-calibrated: · When the meter is new. · Whenever the pH electrode is replaced. · At least once a month. · After use in aggressive chemicals. · After cleaning procedure and changing the reference electrolyte. · For greatest accuracy. · Note the temperature of the buffer solution using a ChecktempC or a glass thermometer (e.g.20 C). · Press the C key to select temperature setting. · Adjust the Temperature knob until the LCD shows the noted temperature. INITIAL PREPARATION Pour small quantities (up to 4cm / 1½" level) of pH 7.01 (HI7007 or HI8007) and pH4.01 (HI7004 or HI8004) or pH 10.01 (HI7010 or HI8010) solution into clean beakers. If possible use plastic beakers to minimize any EMC interferences. If you are measuring in the acid range, use pH4.01 as second buffer; if you are measuring in the alkaline range, use pH10.01 as second buffer. CALIBRATION For accurate calibration, use two beaRINSE kers for each buffer solution; the first HI 7007 HI 7007 for rinsing the electrode, the second for calibration. In this way, contamination of the buffer is minimized. Note: the electrode should be submerged approximately 4 cm (1½") into the solution. 04 70 HI HI 7004 HI 7007 · Press the pH key to select pH measurement. · Wait 1-2 minutes and adjust the OFFSET knob until display shows the pH value at the noted temperature (see the pH versus temperature chart). PROCEDURE Note: If you need to calibrate to NBS standards, use pH 6.86 (HI7006 or HI8006) and pH 9.18 (HI7009 or HI8009) instead of pH7.01 and 10.01 respectively. Use a ChecktempC or a glass thermometer as reference thermometer. · Switch the instrument on by pressing the ON/OFF switch. · Rinse and immerse the pH electrode in pH 7.01 buffer and shake briefly. Wait 1 or 2 minutes for the reading to stabilize. 8 · Rinse and immerse the pH electrode in pH 4.01/pH 10.01 buffer and shake briefly. · Wait 1-2 minutes and adjust the SLOPE knob until display shows the pH value at the noted temperature (see the pH versus temperature chart). · The pH calibration is now complete. 9 4 cm (1½") PH VALUES AT VARIOUS TEMPERATURES Temperature has an effect on pH. The calibration buffer solutions are affected by temperature changes to a lesser degree than normal solutions. For manual temperature calibration please refer to the following chart. TEMP °C °F 32 0 41 5 10 50 15 59 20 68 25 77 30 86 35 95 40 104 45 113 50 122 55 131 60 140 65 149 70 158 4.01 4.01 4.00 4.00 4.00 4.00 4.01 4.02 4.03 4.04 4.05 4.06 4.07 4.09 4.11 4.12 6.86 6.98 6.95 6.92 6.90 6.88 6.86 6.85 6.84 6.84 6.83 6.83 6.84 6.84 6.85 6.85 pH VALUES 7.01 9.18 7.13 9.46 9.39 7.10 9.33 7.07 9.27 7.04 9.22 7.03 9.18 7.01 9.14 7.00 9.10 6.99 9.07 6.98 9.04 6.98 9.01 6.98 8.99 6.98 8.97 6.98 8.95 6.99 8.93 6.99 10.01 10.32 10.24 10.18 10.12 10.06 10.01 9.96 9.92 9.88 9.85 9.82 9.79 9.77 9.76 9.75 ELECTRODE CONDITIONING AND MAINTENANCE Note: to prevent damage to the electrode, remove the pH electrode from the solution before turning the meter off. If the meter is OFF, detach the electrode from the meter before immersing the electrode in the storage solution. Reference Filling Hole Reference Filling Hole Sensitive Wire Reference Wire Reference Junction Glass Bulb Plastic Body pH Electrode Reference Wire Sensitive Wire Reference Junction Glass Bulb Glass Body pH Electrode For instance, if the buffer temperature is 25 C, the display should show pH 4.01, 7.01 or 10.01 at pH 4, 7 or 10 buffers, respectively. At 20 C, the display should show pH 4.00, 7.03 or 10.06. The meter reading at 50 C will then be 4.06, 6.98 or 9.82. Reference Wire Reference Junction Platinum or Gold tip Reference Wire Reference Junction Platinum or Gold tip Glass Body ORP Electrode Plastic Body ORP Electrode PREPARATION Remove the protective cap. DO NOT BE ALARMED IF SALT DEPOSITS ARE PRESENT. This is normal with electrodes and they will disappear when rinsed with water. During transport tiny bubbles of air may form inside the glass bulb affecting proper functioning of the electrode. These bubbles can be removed by "shaking down" the electrode as you would do with a glass thermometer. If the bulb and/or junction is dry, soak the electrode in HI 70300 or HI 80300 Storage Solution for at least one hour. 10 11 For refillable electrodes: If the filling solution (electrolyte) is more than 2½ cm (1") below the fill hole, add HI 7082 or HI 8082 3.5M KCl Electrolyte Solution for double junction or HI 7071 or HI 8071 3.5M KCl+AgCl Electrolyte Solution for single junction electrodes. For a faster response, unscrew the fill hole screw during measurements. for single junction or HI 7082 or HI 8082 for double junction electrodes). Allow the electrode to stand upright for 1 hour. Follow the Storage Procedure above. CLEANING PROCEDURE Soak in Hanna HI 7061 or HI 8061 General Cleaning Solution for approximately ½ hour. Removal of films, dirt or deposits on the membrane/junction: Soak in Hanna HI 7073 or HI 8073 Protein Cleaning - Protein Solution for 15 minutes. - Inorganic Soak in Hanna HI 7074 or HI 8074 Inorganic Cleaning Solution for 15 minutes. - Oil/grease Rinse with Hanna HI 7077 or HI 8077 Oil and Fat Cleaning Solution. IMPORTANT: After performing any of the cleaning procedures rinse the electrode thoroughly with distilled water, refill the reference chamber with fresh electrolyte (not necessary for gel-filled electrodes) and soak the electrode in HI 70300 or HI 80300 Storage Solution for at least 1 hour before taking measurements. TROUBLESHOOTING Evaluate your electrode performance based on the following. · Noise (Readings fluctuate up and down) could be due to: ­ Clogged/Dirty Junction: Refer to the Cleaning Procedure above. ­ Loss of shielding due to low electrolyte level (in refillable electrodes only): refill with fresh HI 7071 or HI 8071 for single junction or HI 7082 or HI 8082 for double junction electrodes. · Dry Membrane/Junction: Soak in HI 70300 or HI 80300 Storage Solution for at least 1 hour. · Drifting: Soak the electrode tip in warm (approx. 50-60 C) Hanna HI 7082 or HI 8082 Solutions for one hour and rinse the tip with distilled water. Refill with fresh HI 7071 or HI 8071 for single junction electrodes and HI 7082 or HI 8082 for double junction electrodes (refillable electrodes only). · Low Slope: Refer to the cleaning procedure above. · No Slope: Check the electrode for cracks in glass stem or bulb and replace the electrode. · Slow Response/Excessive Drift: Soak the tip in HI 7061 or H ...