User manual HANNA INSTRUMENTS HI 93542

[. . . ] Instruction Manual HI 93551 · HI 93551N HI 93551R HI 93542 · HI 93552 HI 93552R K J T - Thermometers www. hannainst. com Dear Customer, Thank you for choosing a Hanna product. Please read this instruction manual carefully before using the instrument. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst. com. These instruments are in compliance with the directives. PRELIMINARY EXAMINATION Remove the instrument from the packing material and examine it to make sure that no damage has occurred during shipping. [. . . ] Note: The ALT key can be released before pressing the second function key for 1-hand operation. ALT/ CAL : press and hold for about 5 seconds to enter the Calibration mode (with reading within ±3°C range). (ALT +) AOFF : set auto-off delay (8 min, 60 min, disabled). (ALT +) °C/°F : change reading units (°C or °F). (ALT +) KJT : select the thermocouple type. (ALT +) BL : toggle the backlight ON and OFF. 9 8 OPERATIONAL GUIDE To switch the instrument ON, press the ON/OFF key. The thermometer will carry out a self diagnostic test routine, the LCD will show all segments for a few seconds (or as long as ON/OFF is held), followed by the percentage indication of the remaining battery life. HOLD and MR FUNCTIONS The HOLD function is activated by pressing the HOLD key. The measured temperature is held on the display until HOLD is pressed again. The "HOLD" tag blinks on the display while in HOLD mode. Note: Although the display is frozen, internally the meter continues measuring and updating Hi/Lo, relative and average values. In HI 93551R, HI 93552 and HI 93552R, the held value is also stored in non-volatile memory and can be recalled by pressing (ALT+) MR keys. While the MR key is held, the "HOLD" tag lights up and the meter displays the stored value; when the MR key is released, after 1 second the meter returns to normal measurement mode. The thermometer then enters normal measurement mode. If a temperature probe is plugged in, the meter displays the measured temperature. If no probe is plugged in, or if the reading is over-range, the display shows flashing dashes. If a measurement is slightly over the range of the meter specifications, the display will flash the closest full-scale value. To switch the meter OFF, press the ON/OFF key. Note: The meters are provided with an acoustic signal feature activated when buttons are pressed, which can be disabled using a switch located in the battery compartment (see figure on page 10). HIGH/LOW TEMPERATURES The maximum and minimum temperatures are continuously monitored and displayed on the lower portion of the LCD. Note: When the reading goes over-range or the probe is removed, the Hi and Lo values display dashes until cleared. °C/°F SELECTION Measurements can be displayed in either degrees Celsius or Fahrenheit. The meter is factory set to °C scale; to change the scale, press °C/°F key (HI 93551, HI 93551N and HI 93551R) or (ALT+)°C/°F keys (HI 93552 and HI 93552R), or set the switch located in the battery compartment (HI 93542, see figure on page 10). CLEAR FUNCTION Upon pressing the CLR key, the High/Low values may be cleared at any time during measurement and the current reading is assigned to the highest and lowest temperature values for the displayed channel only. In HI 93551R, HI 93542, HI 93552 and HI 93552R models, pressing CLR also resets relative and average values. THERMOCOUPLE TYPE SELECTION, KJT By pressing KJT (HI 93551, HI 93551N and HI 93542) or (ALT+)KJT keys (HI 93551R, HI93552 and HI 93552R), the thermometer is set according to the connected thermocouple type. The corresponding symbol will be displayed, i. e. K for K-type, J for J-type, T for T-type. AUTO SHUT-OFF To save battery life, the meters are provided with an auto-off feature, which switches the meter off after 60 minutes of nonuse. [. . . ] Reattach the back making sure that the gasket is in place and tighten the 4 screws to ensure a watertight seal. Battery replacement must only take place in a non-hazardous area using 1. 5V AA (IEC LR6) alkaline batteries. Recommendations for Users FACTORY RECALIBRATION All Hanna thermometers have been accurately pre-calibrated at the factory. It is generally recommended to have all thermometers recalibrated at least once a year. For an accurate recalibration, contact your nearest Hanna Customer Service Center. Before using these products, make sure that they are entirely suitable for the environment in which they are used. [. . . ]