Table of Contents 
1. Advisories ................................................................................................................... 3 
1.1 Copyright ...................................................................................................................................... 3 
1.2 Quality Assurance .......................................................................................................................... 3 
1.3 Documentation ............................................................................................................................. 3 
1.4 Disposal of Electronic Waste ........................................................................................................... 3 
2.  Introduction .............................................................................................................. 4 
2.1 Key Features ................................................................................................................................. 4 
3.  Description ................................................................................................................ 5 
3.1 Meter Description ......................................................................................................................... 5 
3.2 Display Description ........................................................................................................................ 6 
3.3 Button Description......................................................................................................................... 6 
4.  Operation .................................................................................................................. 7 
4.1 Meter Power and APO.................................................................................................................... 7 
4.2 Measuring Temperature and Relative Humidity ................................................................................ 7 
4.3 Moisture Measurements ................................................................................................................ 7 
4.4 Bluetooth® Transmission Basics ....................................................................................................... 8 
4.5 Display Backlight ........................................................................................................................... 8 
4.6 Worklight ..................................................................................................................................... 8 
4.7 Data Hold ..................................................................................................................................... 8 
4.8 Material Group Selection ................................................................................................................ 8 
4.9  Temperature (
o
C, 
o
F) and Relative Humidity Display Selection ............................................................ 8 
4.10 Calibration Verification Test .......................................................................................................... 9 
5.  Bluetooth®
 
Technical Details ..................................................................................... 9 
6.  Field Firmware Upgrades via USB Interface ............................................................. 10 
6.1 System Firmware Upgrade ............................................................................................................ 10 
6.2 Bluetooth® Firmware Upgrade ...................................................................................................... 11 
7.  Maintenance ........................................................................................................... 12 
7.1 Cleaning ..................................................................................................................................... 12 
7.2 Battery Installation and Replacement ............................................................................................ 12 
7.3 Electrode Pin Replacement ........................................................................................................... 12 
8.  Safety ...................................................................................................................... 13 
8.1 FCC Compliance ........................................................................................................................... 13 
9.  Specifications .......................................................................................................... 14 
10. Material Group Reference ....................................................................................... 15 
10.1 Common Names of Timbers (BS888/589:1973) with group nos. ...................................................... 15 
10.2 Botanical names of timbers with MR55 group numbers .................................................................. 17 
10.3 %WME Table (% Wood Moisture Equivalent) ................................................................................ 19 
11. Technical Support ................................................................................................... 20 
12. Three-Year Limited Warranty .................................................................................. 21