Instruction Manual HI 8819 - HI 8820 Bench Conductivity Meters HI 88 19 ON OFF COND TEMP Standa rd Standa Conduc tivity rd at 25 HI 70 °C Cond 33 uctivity HI 70 HI 70 31 90 30 1413 µS HI 70 µS 34 12,88 0 µS 80,00 0 µS 199.9 µS 19.9 mS 9 99.9 mS 1999 µS TEMPE RATURE HI 88 20 ON OFF Standa rd Standa Conductiv ity at rd 25°C HI 70 Cond 33 uctivity HI 70 31 90 µS HI 70 199.9 30 1413 HI 70 µS µS 12,88 34 0 µS 80,00 0 µS 19.99 1999 µS 0 mS 0.5 1 1. 5 2 2.5 99.9 mS TEMP COEF ERATUR FICIEN E T http://www.hannainst.com These Instruments are 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. These instruments are in compliance with CSA, UL and (EN 50081-1 and EN 50082-1) directives. TABLE OF CONTENTS PRELIMINARY EXAMINATION ................................................................ 3 GENERAL DESCRIPTION ........................................................................ 3 KEYBOARD AND REAR PANEL ............................................................... 4 SPECIFICATIONS .................................................................................. 5 CONDUCTIVITY MEASUREMENTS ........................................................... 6 CALIBRATION ....................................................................................... 8 CONDUCTIVITY VS. TEMPERATURE CHART ........................................... 12 TEMPERATURE COMPENSATION .......................................................... 13 DETERMINATION OF THE TEMPERATURE COEFFICIENT OF A SOLUTION (FOR HI8820 ONLY) .............................. 14 PROBE MAINTENANCE ....................................................................... 15 ACCESSORIES .................................................................................... 16 WARRANTY ........................................................................................ 18 CE DECLARATION OF CONFORMITY ...................................................... 19 ISO 9000 Certified Company since 1992 2 PRELIMINARY EXAMINATION Remove the instrument from the packing material and examine it to make sure that no damage has occurred during shipping. If there is any damage, notify your Dealer. Each meter comes supplied with a conductivity probe (HI7685 for HI8819 or HI7687 for HI8820), a voltage adapter, a dust cover and an instruction manual. 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. GENERAL DESCRIPTION HI8819 and HI8820 are digital bench-top multirange conductivity meters designed for simplicity of use in measuring electrical conductivity in liquids. Four ranges of conductivity measurements are provided to cover every application from deionized water to brine. The conductivity probe does not require changing or re-calibration when switching from one range to another. The probe is made of glass with 4 platinum rings that are corrosion resistant. It is also suitable for measuring conductivity of liquids in small sample sizes, and comes with a 1 m (3.3') cable. The temperature effect can be compensated through a knob on the front panel of HI8819. With HI8820, the 4-ring probe has a built-in temperature sensor that automatically compensates for temperature changes in the liquid tested. The temperature coefficient can be adjusted from 0 to 2.5%. 3 KEYBOARD & REAR PANEL KEYBOARD: ON/OFF To switch the instrument ON or OFF COND/TEMP To select the display of conductivity readings or temperature settings for compensation (for HI8819 only) 199.9 µS To select the range 0.0 to 199.9µS/cm 1999 µS To select the range 0 to 1999µS/cm 19.99 mS To select the range 0.00 to 19.99 mS/cm 99.9 mS To select the range 0.0 to 99.9mS/cm TEMPERATURE Knob: To manually set to the temperature compensation of the reading (for HI8819 only) TEMPERATURE COEFFICIENT knob: To set the temperature coefficient from 0% to 2.5% per °C (for HI8820 only). ON OFF COND TEMP Standard Conductivity at 25°C Standard HI 7033 HI 7031 HI 7030 HI 7034 Conductivity 84 µS 1413 µS 12,880 µS 80,000 µS 199.9 µS 19.99 mS 1999 µS 99.9 mS TEMPERATURE Keyboard of HI 8819 ON OFF Standard Conductivity at 25°C Standard HI 7033 HI 7031 HI 7030 HI 7034 Conductivity 84 µS 1413 µS 12,880 µS 80,000 µS 199.9 µS 19.99 mS 1999 µS 99.9 mS 1 0.5 0 1.5 2 2.5 TEMPERATURE COEFFICIENT Keyboard of HI 8820 REAR PANEL: 1) Probe Connection Connect the conductivity probe to the DIN socket. 2) Calibration Trimmer 3) DC Power Socket CONDUCTIVITY ELECTRODE CAL. DC POWER 12V to 20V + 1 2 3 Power connection Plug the 12VDC adapter (HI710005 or HI710006) into the DC socket. Note: Make sure the main line is protected by a fuse. 4 SPECIFICATIONS Range HI8819 0.0 to 199.9 µS/cm 0 to 1999 µS/cm 0.00 to 19.99 mS/cm 0.0 to 99.9 mS/cm 0.1 µS/cm; 1 µS/cm 0.01 mS/cm; 0.1 mS/cm ±1% Full Scale excluding probe error ±1% Full Scale Manual single point through trimmer Manual from 0 to 50°C (32to 122°F) with ß at 2%/°C HI 7685 platinum 4-ring conductivity probe with 1 m (3.3') cable (included) 12VDC through HI710005 or HI710006 (included) 0 to 50°C (32 to 122°F); 95% RH 230x 170x 70mm (9.1 x 6.7 x 2.7") 1 Kg (2.2 lbs) HI8820 0.0 to 199.9 µS/cm 0 to 1999 µS/cm 0.00 to 19.99 mS/cm 0.0 to 99.9 mS/cm 0.1 µS/cm; 1 µS/cm 0.01 mS/cm; 0.1 mS/cm ±1% Full Scale excluding probe error ±2% Full Scale Manual single point through trimmer Automatic from 0 to 50°C (32to 122°F) with a variable ß from 0 to 2.5%/°C HI 7687 platinum 4-ring conductivity probe with 1 m (3.3') cable (included) 12VDC through HI710005 or HI710006 (included) 0 to 50°C (32 to 122°F); 95% RH 230x 170x 70mm (9.1 x 6.7 x 2.7") 1 Kg (2.2 lbs) 5 Resolution Accuracy Typical EMC Deviation Calibration Temperature Compensation Probe Power Supply Environment Dimensions Weight Range Resolution Accuracy Typical EMC Deviation Calibration Temperature Compensation Probe Power Supply Environment Dimensions Weight CONDUCTIVITY MEASUREMENTS Make sure that the instrument has been calibrated before taking conductivity measurements (see page 8 for calibration procedure). Connect the probe to the back of the meter and switch the instrument on by pressing the ON/OFF key. If possible, to minimize any EMC interferences, use plastic beakers for the solutions. FOR HI8819: · Immerse the probe in the solution submerging the holes of the sleeve (0.5 cm below). Tap the probe lightly on the bottom of the recipient to remove any air bubbles which may have being trapped inside the sleeve. · Take the temperature of the solution with a CHECKTEMP or a glass thermometer. · Press the COND/TEMP key to select temperature mode. · Adjust the TEMPERATURE knob until the LCD displays the temperature of the solution. °C TEMPERATURE · Press the COND/TEMP key to select the conductivity measurement range. · If the display shows only a "1", there is an over-range condition. Select the next higher range. · The conductivity reading displayed has been manually compensated for temperature variations. mS · After the measurement is completed, the instrument should be switched off by pressing the ON/OFF key and the probe should be cleaned (see page 15 for cleaning procedure). 6 FOR HI8820: · Immerse the probe in the solution submerging the holes of the sleeve (0.5 cm below). Tap the probe lightly on the bottom of the recipient to remove any air bubbles which may have being trapped inside the sleeve. · If the display shows only a "1", there is an over-range condition. Select the next higher range. · Adjust the "TEMPERATURE COEFFICIENT" knob to the value of the solution. See page 15 for the procedure to select the correct coefficient value. · Before taking any measurement allow a few minutes for the reading to stabilize. As soon as the thermal equilibrium is reached (3 or 4 minutes) the reading stops drifting. · The conductivity reading displayed has been automatically compensated for temperature variations (after 2 or 3 minutes). · After the measurement is completed, the instrument should be switched off by pressing the ON/OFF key and the probe should be cleaned (see page 15 for cleaning procedure). 0 0.5 2 1 1.5 TEMPERATURE COEFFICIENT 7 CALIBRATION INITIAL PREPARATION If you are measuring in the mS ranges, calibrate the meter using HI7030 (or HI8030) conductivity solution (12.88 mS @ 25°C) or HI7034 (or HI8034) conductivity solution (80 mS @ 25°C). Choose a solution with a conductivity value close to the solution to be measured. For the µS ranges, use HI7031 (or HI8031) conductivity solution (1413 µS @25°C) when calibrating in the range from 0 to 1999 µS or HI7033 (or HI8033) conductivity solution (84 µS @ 25°C) when calibrating in the range from 0 to 199.9 µS. Rinse the probe thoroughly in distilled water. This is to minimize contamination of the calibration solution and secure higher accuracy. When possible, use plastic beakers to minimize any EMC interferences. 703 0 PROCEDURE FOR HI8819: · Pour a small quantity of the conductivity solution into a plastic beaker e.g. HI7030 or HI8030 (12.88 mS/cm @ 25°C). · Immerse the conductivity probe in the solution submerging the holes of the sleeve (0.5cm below). Make sure that no air bubbles are trapped inside the glass sleeve. Wait for 2 or 3 minutes for the thermal equilibrium. · Use a CHECKTEMP or a glass thermometer with resolution of 1° for measuring the temperature of the solution (e.g. 18°C). · Switch the instrument on by pressing the ON/ OFF key. · Press COND/TEMP key to display temperature settings. · Adjust the TEMPERATURE knob to display "25°C" if you are using 25°C (77°F) as reference temperature. °C TEMPERATURE 8 HI · Press the COND/TEMP key to display conductivity readings and select the appropriate conductivity range e.g. "19.99 mS" for HI7030/HI8030, "99.9 mS" for HI7034/HI8034, "1999µS" for HI7031/HI8031, "199.9 µS" for HI7033/HI8033. · Using a small screwdriver adjust the trimmer on the rear panel until the display shows the conductivity reading at the temperature of the solution noted earlier (see the mS conductivity vs. temperature chart on page 13) e.g. "11.19 mS". CONDUCTIVITY ELECTRODE CAL DC POWER 12V to 20V + Calibration is now completed and the instrument is ready for use. TO CHECK THE CALIBRATION · Press the COND/TEMP key to display the temperature. · Adjust the TEMPERATURE knob to display the temperature of the calibration solution, i.e. the temperature noted with the CHECKTEMP or glass thermometer. TEMPERATURE 9 · Press the COND/TEMP key to display conductivity. · The display should read the conductivity of the calibrating solution at the reference temperature. E.g. using HI7030/HI8030 with a solution at 18°C, the reading will be "12.88 mS". PROCEDURE FOR HI8820: · Pour a small quantity of the conductivity solution into a plastic beaker. · Immerse the conductivity probe in the solution submerging the holes of the sleeve (0.5 cm below). Make sure that no air bubbles are trapped inside the glass sleeve. Wait for 2 or 3 minutes for thermal equilibrium. · Switch the instrument on by pressing the ON/OFF key. · Select the appropriate conductivity range e.g. "19.99 mS" for HI7030/HI8030, "99.9 mS" for HI7034/HI8034, "1999µS" for HI7031/HI8031, "199.9 µS" for HI7033/HI8033. 1 1.5 · Set the temperature coefficient knob to 2%°C. 0.5 0 2 2.5 TEMPERATURE COEFFICIENT 10 0 703 HI · Using a small screwdriver adjust the trimmer on the rear panel until the display shows the conductivity reading at 25°C (77°F), e.g.: "12.88 mS" for HI7030/HI8030, "80.00 mS" for HI7034/HI8034, "1413 µS" for HI7031/HI8031, "84 µS" for HI7033/HI8033. CONDUCTIVITY ELECTRODE CAL DC POWER 12V to 20V + If you are using a different reference temperature, refer to the conductivity vs temperature charts on page 12 for the appropriate conductivity reading at the reference temperature. E.g. If you prefer to standardize the temperature to 20°C (68°F) rather than 25°C (77°F), using HI7030/HI8030, adjust the trimmer to read "11.67 mS" i.e.11670 µS (as indicated on the chart on page 12). All subsequent measurements will be compensated to 20° (68°F). The calibration is now complete. Note: The instrument should be calibrated weekly or every time the probe has been changed. 11 CONDUCTIVITY VERSUS TEMPERATURE CHART The conductivity of an aqueous solution is the measure of its ability to carry an electrical current by means of ionic motion. The conductivity invariably increases with increasing temperature. It is affected by the type and number of ions in the solution ...