User manual EUTECH INSTRUMENTS CYBERSCAN CON 11 CONDUCTIVITYTDS METER

[. . . ] Instruction Manual CON 11 & CON 110 Handheld Conductivity/TDS/Temperature/RS232C Meter 68X361303 Rev. 1 - 12/03 Technology Made Easy . . . Preface This manual serves to explain the use of the CON 11/110 Conductivity/TDS handheld meters. It functions as a handy reference step by step guide to help you operate the meter. It is written to cover as many anticipated application of the CON 11/110 meters as possible. [. . . ] You can select any temperature between -10. 0 to 110. 0 °C (14. 0 to 230 °F). If necessary, set up the MTC by selecting ATC off as described in page 21. While in conductivity or TDS calibration mode, press the MODE key to enter temperature calibration mode. The primary display act as the adjustable temperature setting and the secondary display shows the default temperature value of 25 °C or indicates the last set temperature setting. Press the MI/ or MR/ keys to offset the temperature to the measured value from step 3. Press HOLD/ENTER to confirm the selected temperature and to return to the Conductivity or TDS measurement mode. 3. MI MR 4. 5. ENTER The meter will now compensate Conductivity or TDS readings for manually set temperature. NOTES: To exit this program without confirming the manual temperature compensation value, DO NOT press HOLD/ENTER in step 5. Press CAL/MEAS instead. Figure 17: Select Manual Temperature Compensation Value 22 Instruction Manual CON 11/110 5. 3 1. Taking Measurements Rinse the electrode with de-ionised or distilled water before use to remove any impurities adhering to the electrode body. To avoid contamination or dilution of your sample, rinse electrode with a small volume of your sample liquid. 3. When dipping the electrode into the sample, take care to ensure that the liquid level is above its upper steel band. Stir the electrode gently in the sample to create a homogenous sample. toggle between Figure 18: Measurement Mode 5. 3. 1 Taking measurements with READY indicator selected on If the READY indicator has been activated, the READY annunciator lights when the reading is stable. 5. 3. 2 Taking measurements with the Auto HOLD feature selected on This feature is only available in CON 110. When a reading is stable for more than 5 seconds, the Auto HOLD feature will automatically "hold" the reading. The "HOLD" indicator appears on the left side of the display. To activate the Auto HOLD feature in SETUP program P 1. 1, see page 38 for directions. 23 Instruction Manual CON 11/110 5. 4 Using Manual Ranging Function Your meter automatically selects the range in which your readings appear. The manual ranging function lets you select the specific range you want to work in: Meter Range Symbol r1 r2 r3 r4 r5 Conductivity Range 0 to 19. 99 µS/cm, 20. 0 to 199. 9µS/cm 200 to 1999 µS/cm; 2. 00 to 19. 99 mS/cm, 20. 0 to 199. 9 mS/cm TDS Range 0. 00 to 9. 99 ppm 10. 0 to 99. 9 ppm 100 to 999 ppm 1. 00 to 9. 99 ppt 10. 0 to 99. 9 ppt 5. 4. 1 Selecting manual range 1. To select the desired measuring range, READY press the RANGE key while in measurement mode. A momentary display of either "r1" to "r5" will flash indicating the range you are in. The range selected will appear on the display and the "MEAS" MEAS Blinking RANGE indicator blinks indicating that you are in manual range. 23 µS °C ATC 2. Press the range key again (if needed) until desired range is selected. [. . . ] To determine the conductivity-to-TDS conversion factor use the following formula: Factor = Actual TDS ÷ Actual Conductivity @ 25 °C Definitions: Actual TDS: Value from the solution bottle label or as a standard you make using high purity water and precisely weighed salts. Actual Conductivity: Value measured using a properly calibrated Conductivity / Temperature meter. Both the Actual TDS and the Actual Conductivity values must be in the same magnitude of units. For example, if the TDS value is in ppm the conductivity value must be in µS; if the TDS value is in ppt the conductivity value must be in mS. [. . . ]