User manual EUTECH INSTRUMENTS ALPHA COND 550

[. . . ] Alpha CON 550 Conductivity Monitor mS/µS/ºC/ºF meter Preface This manual serves to explain the use of the Alpha-CON 550 Industrial Conductivity Monitor. The manual functions in two ways, firstly as a step by step guide to help the user operate the instrument. This instruction manual is written to cover many anticipated applications of the Alpha-CON 550 monitor. If you have doubts in the use of the instrument, please do not hesitate to contact the nearest Alpha Authorised Distributor. [. . . ] You have to recalibrate the monitor every time you change the measuring range since the calibration data of the monitor will be reset every time a new measuring range is selected. About Conductivity Calibration During conductivity calibration, the monitor allows a calibration window of ± 40% from the measured default reading of the calibration standard. The minimum allowable calibration point is 10% of the full scale reading of the measuring range selected. For best results, select a standard conductivity solution close to the sample value you are measuring. 14 Instruction Manual Alpha-CON 550 4. 2 Calibration The monitor requires one-point calibration. Conductivity calibration is always carried out in the specific measuring range selected for the monitor. Make sure, the monitor is set to desired measuring range before you enter calibration mode (Refer Section 5. 4 for selecting measuring ranges). Select a suitable standard conductivity solution so that its conductivity value is within 10% to 100% of the full scale of the selected measuring range of the monitor. (For better accuracy, select the calibration standard to be nearly 50% of the full scale of the measuring range selected. ) Prepare calibration standard solution in two beakers ­ one for rinsing and the other for calibration. All new calibration values will automatically override existing calibration data. If you wish to abort the calibration, press and keys simultaneously and the monitor reverts to measurement mode and the monitor will revert to previous calibration data. 2 CAL MEAS READY 1 µS 2 CAL 3 CAL µS READY HOLD 4 CAL HOLD HOLD K= ENT READY HOLD °C ATC OR 2 HOLD HOLD K= ENT 3 CAL READY HOLD µS READY CAL MEAS µS ENT °C ATC 1 2 From measurement mode press CAL key to enter calibration mode. The display briefly shows the cell type ("2 CELL" or "4 CELL") to which the monitor is configured (Refer section 5. 5 for cell type settings) Next, the last configured cell constant (k) is displayed in the upper display. Use or keys to adjust the cell constant to mach the cell constant of the conductivity probe. Rinse the electrode in de-ionized water and then rinse with the calibration standard. Immerse the probe in calibration standard solution intended for calibration and swirl gently to create a homogenous sample. Make sure there are no any air-bubbles trapped in the sensor. 3 The upper display shows the currently measured conductivity value of the solution based on last calibration (if any). The lower display shows uncalibrated (default) reading of the solution. Once the reading stabilizes press the or key to adjust the upper display value to that of the standard solution. Press the ENT key to accept the value. 15 Instruction Manual NOTES: · Alpha-CON 550 The acceptable calibration window is ±40% of the displayed (default) value. For example, if the display is 1000 µS, the values to which it can be adjusted is 600 to 1400 µS. If the conductivity reading of the solution is not within 10% to 100% of the full scale of the selected measuring range, calibration error occurs; LCD displays "ERR" and flash electrode annunciator. If the conductivity reading of the solution is beyond the selected measuring range, calibration error occurs; LCD displays "Or" (over range), "ERR" and flashes electrode annunciator. If calibration error occurs, exit form calibration mode by pressing and keys simultaneously. · · · 4 Calibration is completed. [. . . ] Calibration factor: The lower display shows `FCt' and the upper display shows the calibration factor based on the last conductivity calibration. NOTE: The upper display shows `- - - ` if the monitor has not been calibrated yet or the monitor has been reset to factory defaults. The monitor reverts to CdAt screen. 2 3 Press or key to access other setup screens or press and key simultaneously (escape) to return to measurement mode. 24 Instruction Manual Alpha-CON 550 6. Technical Specifications General Specification Conductivity Measuring Range: 0. 00 - 20. 00 µS/cm 0. 0 - 200. 0 µS/cm 0- 2000 µS/cm 0. 00 - 20. 00 mS/cm 0. 0 - 200. 0 mS/cm Relative accuracy System accuracy Temperature Measuring range Resolution Relative accuracy Sensor Compensation Calibration Conductivity Number of calibration points Calibration window Calibration standard solution window Temperature Offset Adjustment Display LCD Electrical Data and Connections Conductivity Input Connection terminal EMC Specifications Emission Susceptibility Other Power Input Dimensions (W x H x D) Weight (Estimated) Ambient Temp. [. . . ]