User manual HANNA INSTRUMENTS HI 931100

[. . . ] mannacl_r1. P65 1 2 Instruction Manual HI 931100 HI 931101 HI 931102 Foodcare Water-resistant Microprocessor-based Sodium / Sodium Chloride Meters Dear Customer, Thank you for choosing a Hanna Instruments Product. Please read this instruction manual carefully before using the instrument. This manual will provide you with all the necessary information for the correct use of the instrument, as well as a precise idea of its versatility in a wide range of applications. These instruments are in compliance with directives. TABLE OF CONTENTS Preliminary Examination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Note: the electrode should be immersed approximately 2. 5 cm (1") into the solution. The "CAL" and "BUF" indicators will be displayed with the "BUF" and the " " symbols blinking. · As soon as the standard solution is recognized, the BUF symbol will stay still while the " " symbol will continue to blink indicating that the electrode is stabilizing. The value of the standard solution being used will be displayed on the primary LCD. · As soon as the electrode is stabilized, "CON" symbol will appear on the display. For best results, wait for a couple of minutes before 19 pressing the CFM key. HI 931100 and HI931102 will then display "30. 0 gm". SINGLE POINT CALIBRATION (OFFSET) CFM NaCl °C CAL BUF gm 3 g/L NaCl CFM · If the CAL key is pressed at this point, the calibration process is ended providing only one point calibration. For better accuracy however, it is recommended that a two-point calibration is performed. CAL CAL CAL TWO POINT CALIBRATION CAL · Proceed as described in "Single Point Calibration" but do not quit calibration by pressing the CAL key. · After the first point is confirmed, immerse the FC 300B electrode into the second buffer solution at 0. 3 g/L NaCl (HI 7085/ HI 8085) or 30 g/L NaCl (HI 7081/HI8081). Note: the electrode should be immersed approximately 2. 5 cm (1") into the solution. 0. 3 g/L or 30 g/L NaCl 20 mannacl_r1. P65 21 22 · Select the buffer value by pressing the BUF key. Make sure that the buffer value selected through the BUF key corresponds to the one being used for the second point calibration. · If the reading is not close to the selected buffer, the "BUF" prompt will blink. If on the other hand, the reading is close to the selected buffer, the meter will recognize the standard solution. The BUF symbol will stay still on the display, while the " " symbol will blink, indicating that the meter is stabilizing its reading. · Once stabilized "CON" symbol will appear on the display. For best results, wait for a couple of minutes and press the CFM key. BUF SPECIAL APPLICATIONS & ADDITIONAL INFORMATION BUF HOW TO MEASURE SODIUM CHLORIDE IN CHEESE AND MEAT (HI 931100 & HI931102) 1. Take a sample of cheese or meat to be analyzed. Pour a quantity of X g in a glass beaker. Add (X) x 10mL of deionized water (note: ignoring water content in cheese and meat). CFM 4. Cover the beaker to prevent any spilling during stirring, place the beaker on the top of a hot plate stirrer and agitate the sample at 40-50°C (104-122°F) for 15-20 minutes. CFM · The meter will return to its normal mode and the two point calibration process is completed. Let the sample cool to the ambient temperature, then filter it. 21 22 mannacl_r1. P65 23 24 6. Dip the sodium electrode FC300B into the filtered sample. [. . . ] · Low Slope: Refer to the cleaning procedure above. · No Slope: Check the electrode for cracks in glass stem or bulb and replace the electrode. · Slow Response/Excessive Drift: Soak the tip in Hanna Solution HI7061 or HI 8061 for 30 minutes, rinse thoroughly in a solution with 2% of ISA (see page 22) and then follow the Cleaning Procedure above. TROUBLESHOOTING Evaluate your electrode performance based on the following. · Noise (Readings fluctuate up and down) could be due to: - Clogged/Dirty Junction: Refer to the Cleaning Procedure above. [. . . ]