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INSTRUMENT OPERATION

 - Open the battery compartment and insert the 

batteries supplied. For the most accurate recording of ambient temperatures, the 

Therma-Hygrometer unit should be positioned away from direct sunlight and 

draughts. The coloured indicators above the temperature and humidity display 

are a quick reference guide to humidity levels only.  

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 or MIN reading press the clear button when 

viewing the MAX or MIN readings, '- -' will be shown and reading cleared.   

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 front of the instrument to switch between 

Centigrade and Fahrenheit.

BATTERY REPLACEMENT

 - Replace the battery when the display dims, using an 

2 x AAA or 1.5 volt equivalent. The battery is located under the battery cover at the 

rear of the instrument.

GUARANTEE

 -This instrument carries a one-year guarantee against defects in 

either components or workmanship. During this period, products that prove to 

be defective will, at the discretion of ETI, be either repaired or replaced without 

charge. The product guarantee does not cover damage caused by fair wear 

and tear, abnormal storage conditions, incorrect use, accidental misuse, abuse, 

neglect, misapplication or modification. Full details of liability are available 

within ETI’s Terms & Conditions of Sale at etiltd.com/terms. In line with our 

policy of continuous development, we reserve the right to amend our product 

specification without prior notice.

THERMA-HYGROMETER

Operating Instructions

Product code:

 

810-130

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