User manual HANNA INSTRUMENTS HI 98188

[. . . ] Instruction Manual HI 98188 USP Compliant EC, TDS, NaCl, Resistivity, Temperature Meter EC/TDS/NaCl/Resistivity Meter HI 98188 w w w. c o m 1 Dear Customer, Thank you for choosing a Hanna Instruments product. Please read this instruction manual carefully before using the instruments. This manual will provide you with the necessary information for correct use of the instruments, as well as a precise idea of their versatility. [. . . ] Tap the probe repeatedly to remove any air bubbles that may be trapped inside the sleeve. The instrument will automatically detect the standard after few seconds the reading is stable. · If necessary, press the ARROW keys to select a different standard value. · The " " tag will blink on the LCD until the reading is stable. · When the reading is stable and close to the selected standard, the CFM 27 functional key is displayed. · Press CFM to confirm calibration. · The calibrated value and the third expected standard value will be displayed. · After the second calibration point is confirmed, immerse the EC electrode into the third standard solution and stir gently. Tap the probe repeatedly to remove any air bubbles that may be trapped inside the sleeve. The instrument will automatically detect the standard value. · If necessary, press the ARROW keys to select a different standard value. · The " " tag will blink on the LCD until the reading is stable. · When the reading is stable and close to the selected standard, the CFM functional key is displayed. 28 · Press CFM to confirm calibration. · The calibrated value and the fourth expected standard value will be displayed. · After the third calibration point is confirmed, immerse the EC electrode into the fourth standard solution and stir gently. Tap the probe repeatedly to remove any air bubbles that may be trapped inside the sleeve. · The instrument will automatically detect the standard value. · If necessary, press the ARROW keys to select a different standard value. · The " " tag will blink on the LCD until the reading is stable. · When the reading is stable and close to the selected standard, the CFM functional key is displayed. · Press CFM to confirm calibration. · The calibrated value and the fourth expected standard will be displayed. 29 · After the fourth calibration point is confirmed, immerse the EC electrode into the fifth standard solution and stir gently. · If necessary, press the ARROW keys to select a different standard value. · The " " tag will blink on the LCD until the reading is stable. · When the reading is stable and close to the selected standard, the CFM functional key is displayed. · Press CFM to confirm calibration. · The instrument stores the calibration values and returns to normal measurement mode. FOUR, THREE or TWO-POINT CALIBRATION · Proceed as described in "FIVE-POINT CALIBRATION" section. · Press CAL or ESC after the appropriate accepted calibration point. The instruments will return to measurement mode and will memorize the calibration data. ERROR SCREENS Wrong standard The calibration cannot be confirmed. The EC reading is not close to the selected standard. Select another standard using the ARROW keys. 30 CLEAR CALIBRATION Press Clear functional key when displayed to clear old calibrations. All old calibrations, are cleared and the instrument continues calibration. Note: If Clear calibration is invoked during the first calibration point, the instrument returns to measurement mode. [. . . ] WARNING: Do not replace the rechargeable batteries with alkaline batteries. Do not put ever the instrument with alkaline batteries inside on the recharger. The manufacturer don't assume any obligation for malfunctioning appeared as a result of using alkaline batteries. Note: The instrument is provided with the BEPS (Battery Error Prevention System) feature, which automatically turns the instrument off when the batteries level is too low to ensure reliable readings. 64 TROUBLESHOOTING GUIDE SYMPTOMS Reading fluctuates up and down (noise). [. . . ]