Open the battery compartment and insert battery supplied. For the most accurate recording of ambient temperatures, the Therma-Hygrometer unit should be positioned away from direct sunlight and draughts.
MAX/MIN - Press the MAX/MIN button to display the maximum reading ('MAX' symbol displayed). Press the MAX/MIN button again to display the minimum reading ('MIN' symbol displayed). Press MAX/MIN button again to return to normal readings. To clear the MAX and MIN readings press the 'CLEAR' button when viewing the MAX or MIN readings
Please note: Max/Min readings are not saved so if the battery is removed or drained the Max/Min readings will be cleared.
°C/°F - Press the °C/°F button on the back of the instrument to switch between Centigrade and Fahrenheit.
COMFORT INDICATORS - This unit displays comfort icons in the %rh display to show if the surrounding atmosphere is too dry, just right or too damp.
BATTERY REPLACEMENT - Replace the battery when the display dims, using an AAA or 1.5 volt equivalent. The battery is located under the battery cover at the rear of the instrument.
EMC/RFI - Instrument performance may be affected if operated within a high frequency radio field, such as near a mobile phone, or if subjected to an electrostatic shock.