User manual EUTECH INSTRUMENTS TDS 6

[. . . ] Instruction Manual CON 6/TDS 6 Hand-held Conductivity/TDS Meter 68X243618 Technology Made Easy . . . Rev. 3 06/06 Preface This manual serves to explain the use of the Conductivity and TDS handheld meters. This manual functions in two ways: first as a step by step guide to help you operate the meter; second, it serves as a handy reference guide. This manual is written to cover as many anticipated applications of the Conductivity and TDS handheld meters as possible. If there are doubts in the use of the Conductivity and TDS handheld meters, please do not hesitate to contact the nearest Eutech Instruments/ Oakton Instruments Authorized Distributor. [. . . ] 1) Make sure that the phono jack (for temperature measurement) is disconnected from the meter. Switch on the meter and if necessary, press MODE key to select temperature measurement mode. The "CA" will appear momentarily temperature value will start flashing. and a °C CAL °C 2) 3) 4) 5) Check the temperature of your sample using an accurate thermometer. Wait for the value to stabilize and press or key and adjust the value to the reference thermometer used. The [CO] indicator will appear for 1. 5 seconds, and the reading will stop flashing. The meter returns to measurement mode. HOLD ENTER °C 6) °C 5. 3 23 Instruction Manual CON 6/TDS 6 Taking Measurements To take readings: 1) Rinse the probe with de-ionized or distilled water before use to remove any impurities adhering to the probe body. To avoid contamination or dilution of your sample, rinse probe with a small volume of your sample liquid. NOTE: When dipping the probe into the sample, take care to ensure that the liquid level is above its upper steel band. See Figure in Section 3. 4. 2) 3) 4) 5. 4 Using Manual Ranging Function By default your meter has auto-ranging ability and would automatically selects the range in which your readings appear. However, you may also manually select a specific range you want to measure. This is possible by simply pressing key successively for each measurement range. The five ranges are: Conductivity Range (CON 6) 0 ­ 20. 00 µS/cm 0 ­ 200. 0 µS/cm 0 ­ 2000 µS/cm 0 ­ 20. 00 mS/cm 0 ­ 200. 0 mS/cm TDS Range (TDS 6) (if TDS factor is 0. 5) 0 ­ 10. 00 ppm 0 ­ 100. 0 ppm 0 ­ 1000 ppm 0 ­ 10. 00 ppt 0 ­ 100 ppt 24 Instruction Manual CON 6/TDS 6 Auto-ranging Manual ranging: 0 - 20. 00 uS/cm Manual ranging: 0 - 200. 0 uS/cm µS µS µS mS mS µS Manual ranging: 0 - 200. 0 mS/cm Manual ranging: 0 - 20. 00 mS/cm Manual ranging: 0 - 2000 uS/cm NOTE: If the value of the solution you are measuring is higher than the range selected [Or] will appear on the primary display. You will have reset the manual ranging function each time you turn the meter off. 5. 5 25 Instruction Manual CON 6/TDS 6 HOLD Function This feature lets you freeze the display for a delayed observation. 1) To hold a measurement, press the HOLD key while in measurement mode. Continue to take measurements. HOLD ENTER µS HO 2) µS NOTE: This meter shuts off automatically after 20 minutes of nonuse. If the meter is shut off either automatically or manually, the HOLD value will be lost. 26 Instruction Manual CON 6/TDS 6 6 6. 1 ADVANCED SETUP FUNCTIONS Advanced Setup Overview The advanced setup mode lets you customize your meter's preferences and defaults. To enter advanced setup mode: 1) 2) 3) 4) Make sure that the meter is switched-off. Press ON and MODE key simultaneously, holding both keys for 2 seconds. Overviews of CON 6 and TDS 6's Setup Menu as follows. Enter Setup Page. Select Cell Constant. "Yes" for auto calibration and "no" for manual calibration. (Available in CON 6 meter only) % Adjust Temperature Coefficient value from 0. 0 to 3. 0 %/°C. [. . . ] However, only the ranges that were calibrated have maximum accuracy. If you are measuring in ranges near to or greater than 20 mS (10 ppt), or near to or lower than 100 µS (50 ppm), calibrate the meter at least once a week to get specified ±1% F. S. If you are measuring in the mid-ranges and you washed the probe in deionized water and stored it dry, calibrate the meter at least once a month. Wet the probe for 10 minutes before calibrating or taking readings to saturate the probe surface and minimize drift. If you make measurements at extreme temperatures, calibrate the meter at least once a week. You should only use the conductivity / TDS probe specified for these meters. If you use a different probe without a temperature sensor, you must measure the solution temperature separately and manually enter the solution temperature (see manual temperature compensation section 5. 2) 47 Instruction Manual CON 6/TDS 6 14 ADDENDUM 2: CALCULATING TDS CONVERSION FACTOR You can calibrate your meter using TDS calibration standard solutions. [. . . ]