User manual HANNA INSTRUMENTS HI 98151

[. . . ] Wate rpro of pHep 1 Pocket-Sized 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. [. . . ] · Allow the reading to stabilize and turn the pH 4/pH 10 Calibration Trimmer to read 4. 0 (or 10. 0). Two-point calibration is now complete. ALWAYS USE FRESH BUFFERS FOR CALIBRATION & NEVER REUSE THEM. BATTERY REPLACEMENT: Once the batteries are low, the display segments fade or become blank. 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 replace 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 lack of calibration, dry electrode or run-down batteries. CALIBRATION: The calibration procedure is simple and fast. · Immerse the tester in a pH 7 buffer solution (HI 7007). · Allow the reading to stabilize and using a small screwdriver turn the pH 7 Calibration Trimmer to read 7. 0. HI 7 030 0 RECOMMENDATIONS FOR USERS: Before using this product, make sure that it is entirely suitable for the environment in which it is used. Operation of this instrument in residential areas could cause interference to radio and TV equipment. The glass bulb at the end of the pH electrode is sensitive to electrostatic discharges. [. . . ] To avoid damage or burns, do not perform any measurement in microwave ovens. MADE IN PORTUGAL PRINTED IN PORTUGAL · Rinse the electrode with water and immerse in a pH 4 (HI 7004) or a pH 10 (HI 7010) buffer solution. Wate rpro of pHep 1 Pocket-Sized pH Meter SPECIFICATIONS: RANGE RESOLUTION ACCURACY (@20°C/68°F) TYPICAL EMC DEVIATION ENVIRONMENT BATTERY TYPE LIFE DIMENSIONS WEIGHT 0. 0 to 14. 0 pH 0. 1 pH ±0. 1 pH ±0. 1 pH 0 to 50°C (32 to 122°F) 100% RH 3 x 1. 4V alkaline 350 hours approx. 150x30x24 mm (5. 9x1. 2x0. 9") 85 g (3 oz. ) ® ACCESSORIES: HI 77400P 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) pHep® 1 is a registered Trademark of "Hanna Instruments" Visit our Internet Home Page: www. hannainst. com Authorized Dealer ISPHEP1R1 02/98 [. . . ]