User manual EUTECH INSTRUMENTS STANDARD TDSCAN 4 CONDUCTIVITY TESTER

[. . . ] Setup pH & mV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Sample ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Buffer (Group Selection). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Cal Points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Resolution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Cal Due . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 5. 10. pH Calibration (with preset buffer group) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 pH Calibration (with custom buffers) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Millivolt (mV) Calibration (Offset Adjustment). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Temperature Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Temperature Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Conductivity, TDS, Salinity, & Resistivity Setup . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Sample ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Cal Points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Pure Water Coefficient. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Temperature Coefficient (linear) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Normalization Temperature (°C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Cell Constant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Cal Due . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 11. Conductivity Calibration (automatic). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 12. Conductivity, TDS, Salinity, & Resistivity Calibration (manual adjustment) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 13. [. . . ] The calibrated value, Range (R) that was calibrated and the calculated cell constant are now shown. Before and after a one-point automatic conductivity calibration with 1. 413 mS 23 5) For multi-point calibration repeat steps 2 & 3 with additional standards. Press ESC to save the calibration, or press NEXT to view the calibration report. Additional automatic conductivity calibration notes: A maximum of one calibration point per range can be performed. If multiple calibration points are used in the same range, the most recent one will replace the previous one. When the electrode is replaced, it is best to clear the calibration to the factory default values. Rinse or immerse the probe before calibration and between samples with clean water (deionized water is ideal). To protect from erroneous calibrations, the allowable tolerance is ±40% of the factory default value. For best results always begin with your lowest calibration standard value, followed by the next lowest, and so on. Low conductivity standard solutions (less than 20 µS) are unstable and are very temperature dependent. As a result, reproducible calibration results are challenging in lowest measurement range #1 (0. 00 to 20. 0 µS). "2 Cell' or "4 Cell' electrode is automatically detected and displayed on the measurement screen when connected. 24 12. Conductivity, TDS, Salinity, & Resistivity Calibration (manual adjustment) For best results, periodic calibration with known accurate standards is recommended prior to measurement. Calibrate with standards that are close in value to your intended sample(s). Incorporating a sample ID to identify one or more data points is useful to distinguish data that is saved into memory or sent to a PC or printer. Use the up/down arrow keys to adjust the values and left/right arrow keys to move the cursor. Measure Unit Select ppm, molar, or mg/L ion concentration units. Alarm The 2700 offers a visual and audible alarm to alert you when the High or Low values that have been set from this menu are exceeded. "High Alarm" or "Low Alarm" will blink on the display if the values are exceeded while simultaneously, a loud, intermittent beeping sound is heard. The alarms will continue until the conditions are no longer met, and will only be active during measurement mode. 27 Cal Due When enabled, the "Cal Due" indicator blinks if the number of days since the last calibration has been exceeded. Set the number of days from 1 to 31. Refer to your Ion Selective Electrode instruction manual for details on conditioning, storage, maintenance, calibration standard preparation, Ionic Strength Adjustment, troubleshooting, etc. Each ISE is unique and requires care and operation that is specific to the electrode and ion of interest. 28 14. Ion Calibration The ION 2700 can measure ion concentration such as ammonia or fluoride when using an ion selective electrode (ISE) for the specific ion of interest. Ion calibration is required with at least two standards from (8) available values; 0. 001, 0. 01, 0. 1, 1. 0, 10, 100, 1000, and 10000. The primary display will show "- - - -" when ion calibration is required for ion measurement. Prepare ion calibration standards that bracket your measurement range. Follow the ion selective electrode instruction manual for the appropriate ionic strength adjustment and sample preparation. For best results always begin with your lowest calibration standard value, followed by the next lowest, and so on. 1) 2) Connect the ISE and press MODE as needed for concentration mode. Rinse the ISE with clean water then dIp into your lowest calibration standard and stir. [. . . ] DO Instrument will not read zero in sodium sulfite solution Solution contains oxygen--use fresh solution. Replace membrane and recondition sensor. Calibrate using water bath or known accurate thermometer. When "Stability" is enabled, the digits on the primary reading will be faded when unstable, becoming solid when stable. [. . . ]