User manual HANNA INSTRUMENTS HI 9064

[. . . ] The instruments are housed in a rugged, water-resistant casing for maximum protection against effect of humidity and condensation. The RH probe contains both the sensor and the electronic circuitry necessary to amplify the RH readings. Another electronic circuit converts the signals sent by the probe into a digital readout in % Relative Humidity. Note: The RH probe sensor must never come into contact with water or other liquids. [. . . ] Remove the back cover, unwrap the batteries and install them while paying attention to their polarity. Connect the RH probe to the 7-pin DIN socket on the top of the meter and fasten the screw tightly. Note: HI 9065 has to be used with just one probe (RH or temperature) at a time. HUMIDITY MEASUREMENTS ON/OFF Turn the meter on by pressing the ON/OFF key. Press the RH key to display the RH % measurement. The symbol "H" is displayed when measuring Relative Humidity (not for HI9160). Through 2 trimmers on RH probe HI70608/2 0 to 50 °C (32 to 122°F) 100% RH 196x80x60 mm (7. 7x3. 1x2. 4") L:165 mm D:25 mm with 2 m cable (L:6. 5" D:1" 7' cable) 4 x 1. 5V AA / 500 hours of continuous use 425 g (15 oz. ) 200 g (7 oz. ) H RH Using these hygrometers is simple. However, the recommendations below should always be followed. · The end of the humidity detector should be exposed to a current of air moving at 0. 5 m (20") per second or more. · In the absence of air movement, the response can be accelerated by moving the probe. · The probe sensor must never come into contact with water or other liquids. If this should happen, or if condensation causes drops to form on the surface of the humidity sensor, turn off the instrument and wait until they have evaporated completely. In order to accelerate the evaporation process, the humidity sensor could be exposed to a current of air. 6 7 TEMPERATURE MEASUREMENTS (FOR HI9065 ONLY) Connect the HI 765N temperature probe into the socket placed on the top of the meter (refer to #9 in the Functional Description, page 4) and the unit will automatically display the readings from the temperature probe. For special applications, you can choose in a wide range of separate temperature probes (see Accessories at page 13). Note: HI 9065 has to be used with just one probe (RH or temperature) at a time. By pressing the °C key "°C" is displayed with temperature value in degrees Centigrade. CALIBRATION All Hanna hygrometers have been precalibrated at the factory. Hanna Instruments uses state-of-the-art thermal humidity chambers for this purpose. It is generally recommended to have all hygrometers recalibrated at least once a year. For an accurate annual recalibration, contact your nearest Hanna Service Center. You can also check the status of your hygrometer and perform a quick RH recalibration (with an accuracy of ±5%) by using the Hanna mini-calibration chamber HI7101. The kit is composed of two thermally isolated chambers, each one equipped with a threaded cap and three bottles containing the appropriate precalibrated saturated salts to produce a known RH value. °C °C Li Cl 11. 1% Na Cl 75. 4% The same reading in degrees Fahrenheit it would read if you press the °F key. CALIBRATION KIT PREPARING THE CALIBRATION SOLUTIONS: °F · Pour approximately 26 cc of distilled water into a glass container. If you experience any problems in taking measurements, please contact your dealer or the nearest Hanna Instruments Customer Service Department. · Immerse this container into a bath of ice and water and shake briefly. · Slowly add the contents of a HI7111 bottle containing LiCl into the glass container while continuing to shake. · When the salts have dissolved completely, add all the content of the second bottle of HI7111. · Allow the solution to cool, and pour it into the chamber marked "RH11. 1%", making sure that no residue remains on the walls of the glass container. Li Cl 11. 1% HOLD FUNCTION (HI 9064 AND HI 9065 ONLY): The reading HOLD function is activated by the HOLD key. [. . . ] For HI 9064 and HI 9065, upon depletion of the power in the batteries up to a prefixed threshold, the LCD automatically switches off. For HI9160, when the batteries are low "V" is displayed on the LCD to warn the user. Operation of these instruments in residential area could cause unacceptable interferences to radio and TV equipments, requiring the operator to take all necessary steps to correct interferences. Any variation introduced by the user to the supplied equipment may degrade the instruments' EMC performance. [. . . ]