User manual EUTECH INSTRUMENTS STANDARD PHSCAN 2 PH TESTER

[. . . ] 8 P3. 0 ConF (Configuration) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 P3. 1 rdY (Ready / Stability Indicator) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 P3. 2 °C°F (Celcius Or Fahrenheit). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 P3. 3 buFF (pH Buffers & Calibration Points). . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] CALIBRATION 3. 1 pH Calibration For best results, periodic calibration with known accurate standards is recommended. Calibrate with standards that bracket your intended measuring range while including a neutral standard (pH 7. 00 or 6. 86). For example, if you expect to measure samples from pH 6. 2 to pH 9. 5, calibration with 4. 01, 7. 00, and 10. 01 will work well. The non-volatile memory retains all calibration values upon meter shut down. The following calibration standards are automatically recognized; USA buffer group NIST buffer group 1. 68, 4. 01, 7. 00, 10. 01, 12. 45 1. 68, 4. 01, 6. 86, 9. 18, 12. 45 See Section 5. 6 to change the buffer group To eliminate temperature errors associated with the pH electrode, attach the automatic temperature compensation (ATC) probe for best accuracy. Without temperature compensation, pH accuracy will worsen as samples deviate from 25ºC and pH 7. 1) Press as needed to select pH. 2) Dip the pH and ATC electrodes into pH buffer and press . The primary reading will flash briefly before the secondary display begins scrolling the remaining available buffers. The primary reading READY indicator appears, press will flash briefly then display the percent efficiency (slope) before the secondary display begins scrolling the remaining available buffers. 4 4) To calibrate another buffer repeat step 3) or press to return to the measurement mode. Note: The meter will automatically return to measurement mode upon successful completion of the number of specified calibration points. To specify a different number of pH calibration points see Section 5. 6. "SLP Err" indicates that the calibration for the current point was not successful. This occurs when the slope (mV difference between two consecutive points) is lower than 15mV/decade or higher than 90mV/decade. 7) Revert to step 3) to calibrate additional points or press as needed to return to measurement mode at any time. Note: The meter will automatically return to measurement mode upon successful completion of the number of specified calibration points. STORING AND RECALLING DATA The 700 series meters can retain up to 100 points into memory for later retrieval. 1) In the measurement mode, press to insert the measured value into memory. The stored memory location value (StO) is briefly displayed. 7 2) To recall data from memory, press stored data is displayed first. The location of the most recent or to select the location of to accept. to return to the stored data location. SETUP FUNCTIONS Use the set up mode to customize your instrument operation. During measurement, press and hold Press Press Press or for 5 seconds to enter SETUP mode. to change programs or change options. to select the program or confirm selection. to go back a level or to return to measurement mode. 5. 1 P1. 0 CAL (Calibration) Press to view each stored calibration point. 5. 2 P2. 0 ELE (Electrode Information) Press Press to view mV offset (OFS) in mV and pH modes only. [. . . ] Ion slope calibration error; calibration solutions are outside acceptable range (15 to 90 mV per decade). Calibration attempted using only 1-point that was not pH 7 (USA) or pH 6. 86 (NIST). Buffer value does not match value displayed or electrode is disconnected or failing. Recalibrate using 2 or more pH points or use pH 7 (USA) or use pH 6. 86 (NIST). [. . . ]