HT632 Digital Wood Moisture Meter with Two Pins HT632 Moisture Measurement:0-58.0% (Accuracy 2.0%) Temperature:-20~60 /-4~140 (Accuracy 1.0%) Relative Humidity:0-99.9%RH (Accuracy 4.0%RH) Material Selections:1.Type:Beech,Spruce,Larch,Birch,Cherry,Walnut Range 9.0~57% 2.Oak,Pine,Maple,Ash,Douglas Fir,Eucalyptus Range:7.0%~52% 3.Cement Mortar Layer,Concreate Range:0.9%~23.0% 4.Anhydrous gypsum mortar Layer Range:0.0~12.0% 5.Cement mortar Range:0.7~9.0% 6.Lime mortar,gypsum Range:0.5~10% 7.Brick Range:0.0~17% Max/Min Display:Yes Multipoint Measurement AVG:Yes Data Hold:Yes C/F:Yes Auto Power Off:Yes Low Battery Indicator:Yes Dear friends, please pay attention, do not measure immediately after receiving the goods. This product needs to be calibrated before it can be used for normal measurement. If the humidity of the material is directly measured without calibration, the value will not be correct . The following list are the operating steps : 1:Pre the Power on/off button key to turn on power and enter the measurement mode. 2:Pre the "M" button key to select the measured material category as 1,and the material category number is displayed in the lower left corner of the display. 3:After selecting the material category,remove the protective cap,insert two test pins of the instrument into the test contacts on the protective cap at the samet ime,and ensure good contact. 4:The meter will display approximately 20.5%RH,indicating that the meter is operating properly.