User manual HANNA INSTRUMENTS HI 98153

[. . . ] Waterpro of pHep® 3 Pocket-Sized Microprocessor pH Meter OPERATION: · Do not be alarmed if white crystals appear around the cap. This is normal with pH electrodes and they dissolve when rinsed with water. · Remove the protective cap and switch the unit on by pressing the ON/OFF key. · Immerse the electrode in your sample. [. . . ] Once display stops blinking, pHep®3 is calibrated and ready to use. ALWAYS USE FRESH BUFFERS FOR CALIBRATION. BATTERY REPLACEMENT: Once the batteries are low, the unit will display the warning symbol "Eb". Use a coin to remove the battery compartment cover located on the top of the tester (it will open with just a 1/4 turn). Remove the cover with its O-ring and replace all the batteries paying attention to their polarity. Reinsert the cover with the O-ring and close it with a coin. It is recommended to recalibrate the instrument whenever you change the batteries. Batteries should only be replaced in a safe area using the battery type specified in this instruction manual. DO NOT USE DISTILLED OR DEIONIZED WATER FOR STORAGE PURPOSES. · Large differences in pH readings (±0. 5 pH) could be due to a lack of calibration, a dry electrode or run-down batteries. CALIBRATION: The calibration procedure is very simple and fast. · Switch the unit on by pressing the ON/OFF key. · With the meter on press and hold the ON/OFF key for about 3 seconds. The display will start blinking "7. 0o" to confirm that you have entered the calibration mode. · Immerse the electrode in a pH 7 buffer (HI 7007). Stir gently and wait for approximately 20 seconds. · If "Ec" appears on the display, it means that the pH 7 solution is not fresh or the electrode is not conditioned. [. . . ] To avoid electrical shock, do not use this instrument when voltage at the measurement surface exceeds 24 VAC or 60 VDC. To avoid damage or burns, do not perform any measurement in microwave ovens. MADE IN PORTUGAL PRINTED IN PORTUGAL Waterpro of pHep® 3 Pocket-Sized Microprocessor pH Meter SPECIFICATIONS: RANGE 0. 0 to 14. 0 pH RESOLUTION 0. 1 pH ACCURACY ±0. 1 pH (@20°C/68°F) TYPICAL EMC ±0. 1 pH DEVIATION TEMPERATURE Automatic from COMPENSATION 0 to 50°C (32 to 122°F) ENVIRONMENT 0 to 50°C (32 to 122°F) RH 100% BATTERY TYPE 4 x 1. 4V alkaline LIFE 300 hours approx. DIMENSIONS 150x30x24 mm (5. 9x1. 2x0. 9") WEIGHT 85 g (3 oz. ) ACCESSORIES: Calibration sachets pH 4 & pH 7 (2 0 mL, 5 pcs each) HI 77700P Calibration sachets pH 7 (2 0 mL, 10 pcs) HI 770710P Calibration sachets pH 7 & pH 10 (2 0 mL, 5 pcs each) HI 7004L pH 4 calibration solution (460 mL) HI 7004M pH 4 calibration solution (230 mL) HI 7007L pH 7 calibration solution (460 mL) HI 7007M pH 7 calibration solution (230 mL) HI 7010L pH 10 calibration solution (460 mL) HI 7010M pH 10 calibration solution (230 mL) HI 70300L Storage solution (460 mL) HI 70300M Storage solution (230 mL) HI 77400P pHep® is a registered Trademark of "Hanna Instruments" Visit our Internet Home Page: www. hannainst. com Authorized Dealer ISPHEP3R1 02/98 [. . . ]