INSTRUCTION MANUAL Model 392050 Stem Thermometer Congratulations on your purchase of the Extech 392050 Stem Thermometer. With proper care, this device will provide years of reliable service. o o Display 3-1/2 digit LCD with C/ F degree indicator Measurement ranges -58 to 302 F (-50 to 150 C) Auto Off After one hour of operation Resolution 0.1 C/F from –19.9 to 199.9 F (-20 to 150 C) Accuracy <2 F (1 C) from –14 to 212 F (-50 to 100 C) Sensor length 5.1” (130mm) Sensor material Stainless steel Operating temperature -14 to 122 F (0 to 40 C) Battery power 1.5V LR44 cell (5000 hour approx. life) o o o o o o o o o o o OPERATION Slide the ON/OFF switch to the ON position to power the meter. The LCD display will begin to indicate temperature. If the display does not operate, replace the battery. Slide the red sensor sheath (with convenient pocket clip for storage) off of the stainless steel stem sensor. Place the stainless steel sensor in the area to be measured or insert the probe between 20 - 60mm (100mm max) into materials under test. Do not force probe into solid or semi-solid materials. o Slide the F/C switch to the desired units, the LCD should indicate the change. The Auto Shut Off feature automatically turns the thermometer off after one hour of operation. This feature extends the life of the battery. Slide the On/Off switch to OFF and then ON again to resume operation To replace the battery, open the battery compartment (center phillips screw turned ¼ turn counter-clockwise), and replace the battery with an LR44 button battery. Replace the battery compartment by turning the phillips screw clockwise ¼ turn. Be careful not to force the screw in either direction. WARRANTY EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment (a six month limited warranty applies on sensors and cables). If it should become necessary to return the instrument for service during or beyond the warranty period, contact the Customer Service Department at (781) 890-7440 ext. 210 for authorization. A Return Authorization (RA) number must be issued before any product is returned to Extech. The sender is responsible for shipping charges, freight, insurance and proper packaging to prevent damage in transit. This warranty does not apply to defects resulting from action of the user such as misuse, improper wiring, operation outside of specification, improper maintenance or repair, or unauthorized modification. Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable for any direct, indirect, incidental or consequential damages. Extech's total liability is limited to repair or replacement of the product. The warranty set forth above is inclusive and no other warranty, whether written or oral, is expressed or implied. Copyright © 1999 Extech Instruments Corporation. All rights reserved including the right of reproduction in whole or in part in any form. 1 392050 Ver. 1.4 06/00