User manual HANNA INSTRUMENTS HI 991401

[. . . ] This instrument is in compliance with the directives. FUNCTIONAL DESCRIPTION SPECIFICATIONS 0. 0 to 14. 0 pH 0. 0 to 60ºC (32. 0 to 140ºF) 0. 1 pH 0. 1ºC or 0. 1ºF Accuracy (@20ºC/68ºF) ±0. 1 pH ±0. 5 ºC or ±1ºF Typical EMC Deviation ±0. 1 pH ±1ºC or ±2 ºF Temp. Compensation Automatic Electrode HI 1293D (included) Calibration At 1 or 2 points with auto-buffer recognition Power supply 12VDC power adapter (included) Environment 0 to 50ºC (32 to 122ºF); RH 95% non-condensing Dimensions (meter only) 160 x 105 x 31 mm (6. 2 x 4. 1 x 1. 2'') Weight (meter only) 190 g (6. 7 oz. ) Range pH temperature Resolution PRELIMINARY EXAMINATION Remove the instrument from the packing material and examine it carefully. If any damage has occurred during shipment, immediately notify your Dealer or the nearest Hanna Customer Service Center. The meter is supplied with: · pH 4. 01 and 7. 01 buffer solutions (20 mL each); · HI 1293D pH-electrode with differential input signal; · Hanna 12 VDC power adapter; · Instruction manual. Note: Conserve all packing material until the instrument has been observed to function correctly. [. . . ] Temperature probe, pipe thread 1/2'' NPT (works also as matching pin for pH-electrode) 7. SET/HOLD button 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 unacceptable interferences to radio and TV equipment. The glass bulb at the end of the electrode is sensitive to electrostatic discharges. During operation, ESD wrist straps should be worn to avoid possible damage to the electrode by electrostatic discharges. Any variation introduced by the user to the supplied equipment may degrade the instrument's EMC performance. To avoid electrical shock, do not use this instrument when voltages at the measurement surface exceed 24 VAC or 60 VDC. To avoid damages or burns, do not perform any measurement in microwave ovens. ISTR991401R1 05/03 OPERATIONAL GUIDE To turn the meter on Connect the pH electrode to the meter. Connect the 12VDC adapter to the meter and to the mains; the display will lit. To change the temperature unit To change the temperature unit (from °C to °F), from measurement mode, press and hold the MODE button until TEMP and the current temperature unit are displayed on the lower LCD. Use the SET/HOLD button to change the temperature unit, and then press MODE button twice to return to normal measurement mode. To freeze the display Press and hold the SET/HOLD button for 2-3 seconds until HOLD appears on the secondary display. Taking measurements Immerse the electrode and the temperature probe in the solution to be tested. In order to ensure better accuracy, the electrode should not touch or stand close to the walls or bottom of the sample vessel. The pH value automatically compensated for temperature is shown on the primary LCD while the secondary LCD shows the temperature of the sample. The measurements should be taken when the stability symbol on the top left of the LCD disappears. Note: Measurements have to be taken with both probes (pHelectrode and temperature probe) immersed in the same vessel. To turn the meter off Press the MODE button while in normal measurement mode. Notes: · Before taking any measurement make sure the meter has been calibrated. · To clear a previous calibration, press the MODE button after entering the calibration mode. The lower LCD will display ESC for 1 second and the meter will return to normal measurement mode. [. . . ] When the second buffer is recognized, the LCD will display OK for 1 second and the meter will return to the normal mode. Note: for storing calibration data in the non-volatile memory, turn the meter OFF and then ON again through the MODE button. The CAL symbol on the LCD means that the meter is calibrated. pH ELECTRODE MAINTENANCE · When not in use, rinse the electrode with water to minimize contamination and store it with a few drops of storage (HI 70300) or pH 7 (HI 7007) solution in the protective cap after use. · If the electrode has been left dry, soak in a storage or pH 7 solution for at least one hour to reactivate it. [. . . ]