User manual EUTECH INSTRUMENTS PH 5 PLUS PH TEMP

[. . . ] Instruction Manual pH 5+ pH/Temp pH 6+ pH/mV/Temp Ion 6+ pH/Ion/mV/Temp Technology Made Easy . . . 68X243633 Rev 1 12/08 Part of Thermo Fisher Scientific Preface This instruction manual serves to explain the use of the pH 5+, pH 6+ and Ion 6+ meters. It 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 pH 5+, pH6+ and Ion 6+ meters as possible. If there are doubts in the use of this meter, please do not hesitate to contact the nearest Eutech Instruments Authorized Distributor. [. . . ] This hydrates the glass bulb if the electrode is too dry or has not been used recently. Always rinse the probes with clean water before and after each calibration/sample measurement to avoid cross-contamination. For details refer to section 5 on Electrode care and maintenance. 3. 1. 1 pH Calibration Procedure 1. Pour known pH buffer calibration standard solution into a clean, dry container, e. g. 30 seconds depending on your electrode condition). -7- Instruction Manual pH 5+, pH 6+, Ion 6+ 3. "CA" displays momentarily before the display flashes the current un-calibrated reading. 4. To abort or cancel calibration without accepting the new value, press CAL key. "CO" displays momentarily before reverting to pH measurement mode. 6. Repeat step 1 with additional pH buffer calibration standard solutions. 3. 1. 2 Changing the pH Buffer Group You can calibrate with pH standards of either USA, NIST (nSt) or Low Ionic (Pb) pH buffer groups. To abort buffer group selection press CAL to revert to pH measurement mode. Press and hold MODE while switching the meter on using the ON/OFF key. Use the MODE key to toggle between USA, NIST or Pb as shown below. -8- Instruction Manual pH 5+, pH 6+, Ion 6+ Press ENTER key to confirm your selection. The meter will save the selected group indefinitely until changed. 3. 1. 3 Resetting User Calibrated Values The calibrated pH/mV/Ion values can be reset to factory default using the procedure below. Turn on the meter and select ion mode by pressing MODE key if necessary. For best results, always begin with your lowest standard value, followed by the next lowest standard. The display shows "CA" (to indicate calibration mode) momentarily followed by "0. 1" flashing. To select the appropriate standard, use and keys. -10- Instruction Manual pH 5+, pH 6+, Ion 6+ 3. The displayed value now shows the corresponding mV reading for the selected ppm value selected. When the mV reading is stable, press ENTER to complete the 1 point calibration. The displayed value now shows the corresponding mV reading for the selected ppm value selected. When the mV reading is stable, press ENTER to complete the 2 point calibration. The ISE slope in mV value "PXX mV" will momentarily display before reverting to ion measurement mode. rd nd -11- Instruction Manual pH 5+, pH 6+, Ion 6+ If the calibration is not successfully stored into its memory, an error message "Er3" will be displayed. [. . . ] The LCD displays "HO" annunciator to indicate the HOLD function is activated. 4. 4 Releasing a Held Reading Press HOLD key once again to deactivate the HOLD function or to release your frozen reading. The meter reverts to current measurement mode, and the "HO" annunciator disappears from the LCD. -15- Instruction Manual pH 5+, pH 6+, Ion 6+ 5. ELECTRODE CARE AND MAINTENANCE For best results, keep the ISE capped dry and pH/ORP electrode bulb wet. Avoid excessive drying of the glass membrane and avoid touching it with your fingers. [. . . ]