User's Guide 99 Washington Street Melrose, MA 02176 Phone 781-665-1400 Toll Free 1-800-517-8431 Visit us at www.TestEquipmentDepot.
Introduction Congratulations on your purchase of the Extech MO257 Pinless Moisture Meter. The pinless moisture sensor monitors the moisture in wood and other building materials without causing surface damage. High frequency sensing technology allows the meter to take noninvasive moisture measurements. User programmable alarms alert the user if moisture measurements exceed alarm set-points. This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service.
Operation Pinless Moisture Measurements 1. Press the power 2. Before first use the meter must be calibrated to a known dry area as described below. button to turn the meter on. 3. To calibrate, press the MEAS button immediately after powering the meter. The display will audibly beep and visually flash the CAL display icon. Keep the measurement sensor at least 3 to 4” (8 to 10 cm) from any object during calibration. 4. When the calibration is complete the beeping and flashing stop.
Auto Power Off To conserve battery energy, the meter will enter a sleep mode after approx. 30 minutes of inactivity. Press the power button to wake the meter. Backlit LCD Press the up/backlight button to switch the backlighting ON or OFF. Specifications Function Range Accuracy Moisture Range 0.0 to 100.0 Relative only Measurement Depth 0.79 to 1.57” (20 to 40mm) Display type Backlit LCD Display digits Three (3) numeric displays; each displaying from 0.0 to 100.
Warranty EXTECH INSTRUMENTS CORPORATION (A FLIR COMPANY) 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 to 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 or visit our website www.extech.com for contact information.
