Care of the MiniRes

Care  of  the  MiniRes


The MiniRes should not be used in direct rain or wet snow. Much effort has been expended to make the instrument water-resistant. The switches were carefully selected to be water resistant as well as the type and installation of the LED’s. There is a rubber O-ring between the faceplate and the case. However, the instrument should never be considered waterproof. If it has been exposed to moisture, it should be opened and allowed to dry. Moisture or dirt between the binding posts will degrade the accuracy of the reading.


If the case is closed, the instrument is waterproof. If the instrument is moved to a much lower elevation or colder temperature, it might be difficult to open the case because of the lower air pressure inside the case. There is a small air port near the handle of the case. Loosen the black knurled knob and allow the internal air to equalize with the external air. Remember to retighten the knob so the case will again be watertight.


If the MiniRes is placed in storage for many months, the four “D” cell batteries should be removed in case they start to leak.


The instrument is available in a yellow case or a black case. Direct exposure to the sun on a hot day for a prolonged time can cause the internal temperature to become excessive, especially if the instrument is in the black case.


The LCD is specified by its manufacturer to operate accurately between 0º C and +50º C (+32º F and +122º F).  In actual tests the LCD meters have operated at -15º C (5º F). The LCD should not be stored at temperatures below -20º C (-4º F) nor at temperatures above +75º C (+167ºF). 



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