User manual HANNA INSTRUMENTS HI 91541

[. . . ] To prolong battery life, it shuts itself off automatically after half hour of non-use. HI 91541 and HI 9061 have been specifically designed by Hanna Instruments for use in the food industry and are available in two versions: HI 9061C to measure in degrees Celsius; HI 9061F to measure in degrees Fahrenheit. HI 91541C to measure in degrees Celsius; HI 91541F to measure in degrees Fahrenheit. Each HI9061C and HI9061F comes supplied TABLE OF CONTENTS Preliminary Examination . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] (outside) for one year, excluding probe error ±0. 5°C ±1°F with HI 764 probe HI 764 series (optional) 4 x 1. 5 V AA / 200 hours 0 to 50°C (32 to 122°F); 100% RH 196 x 80 x 60 mm (7. 7 x 3. 1 x 2. 4") 425 g (15 oz. ) 6 7 OPERATIONAL GUIDE INITIAL PREPARATION Each meter is supplied complete with batteries. Remove the back cover, unwrap the batteries and install them while paying attention to their polarity. To switch on, press the ON/OFF key on the front of the unit. ON/OFF HI / LO MEMORIES (for HI 9060 only) The maximum and minimum temperatures are monitored throughout a continuous measuring process. The values may be recalled or cleared at any time during the measurement. Enquiries of the highest or lowest measured temperature may be made by pressing the respective HI or LO keys. The appropriate display indicator will appear together with the value retrieved from memory. Release the key to resume normal operation. °C HI ON/OFF HI If the meter does not come on, make sure that the batteries securely sit in their place. Each time the thermometer is switched on, it will carry a self-test to ensure that no segment is missing. The LCD °C shows a full set of fig°F ures during the self-test. After the test the thermometer will resume its operational mode. If a temperature probe is plugged in, the unit displays the probe temperature. If a probe is not plugged in, or the cable is defective, the display will show "Er" (for HI 9060 and HI 9061) or "---- (for HI 91541). ----" ---HI LO M °C LO LO By pressing the CLEAR key, the present measurement reading becomes the highest and lowest temperature in memory, i. e. both HI / LO are the same temperature reading. The "HI/LO" display indicator will blink twice to notify user that clearing process is in progress. °C HI LO To switch your thermometer off, press the ON/OFF key again. 8 CLEAR 9 HOLD MODE (for HI 9060 only) The reading hold function is activated by the HOLD key. The measured temperature is frozen on the display when this function key is pressed. A blinking "M" on the display indicates the operating mode. HI 9060 and HI 9061 stop to operate when the low battery signal is detected. The user is warned by the code "Eb". HI 91541 displays "BAT" when the batteries are run down. See also the Battery Replacement section on page 14. BAT °C M HOLD Press the same key again to resume normal operation. HOLD MEASURING SCALE (°C/°F) (for HI9060 only) When the meter is turned on it automatically defaults to the °C scale. °C Measurements can be performed in either the Centigrade or Fahrenheit scale. To change the scale, press the °C/°F key once. LOW BATTERY DETECTION °F °C/°F 10 11 DISPLAY CODES GUIDE Your thermometer is factory programmed to diagnose a fault or warn of low battery levels. This is indicated by the error codes on the LCD. Moreover, self-explanatory symbols are used to remind the user of the operating mode or conditions. [. . . ] To avoid damages or burns, do not perform any measurement in microwave ovens. In particular cases HI 9060 could switch from °C to °F or vice-versa. In such cases press the °C/°F key to resume the proper measurement range. In particular cases the meters could turn off. [. . . ]