
LCR318 Manual FINAL_print 020713_awb 2/7/13 10:25 AM Page 1
MINI HYGRO-
THERMOMETER
USER’S MANUAL
LCR318
99 Washington Street
Melrose, MA 02176
Phone 781-665-1400
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com

INTRODUCTION
Thank you for purchasing General Tools & Instruments’
LCR318 Mini Hygro-Thermometer. Please read this
user’s manual carefully and thoroughly before using
the product.
The LCR318 is an ideal instrument for monitoring the
humidity and temperature environment of pianos,
humidors, wine cellars, musical instrument cases and
computer rooms.
KEY FEATURES
• Simultaneously displays indoor temperature (in °F)
and relative humidity (RH) as a percentage
• Min and Max temperature and humidity memory
• Large LCD
• Low battery warning
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• Foldaway stand for desk mounting; also can be
wall-mounted
• Includes battery
• CE approved
WHAT’S IN THE BOX
The LCR318 comes in a box along with:
• A preinstalled “LR44” battery with an activation tab
• This user’s manual
SETUP INSTRUCTIONS
ACTIVATE THE UNIT
If you are reading this, you have already removed the
unit from the bubble-wrap bag. Peel away the film
protecting the display.
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To activate the unit:
1. Open the battery compartment (marked OPEN) on the
right side of the back of the unit by sliding its cover
down, in the direction of the arrow stenciled on it.
2. Remove the black activation tab under the LR44
button battery. Discard the tab.
3. Install the battery in the well so its rounded side faces
down and its flat side (marked “LR44”) faces up. The
battery does not snap into place, so do not apply
downward pressure.
4. Replace the battery compartment cover by sliding it
up, in the direction opposite the arrow on it. The
pressure of the cover is what holds the battery in
place.
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