3. Description 
3.1 Meter Description 
1.  Temperature and Relative Humidity sensors 
2.  Measurement electrode pins 
3.  Display (backlit LCD) 
4.  Data Hold (short press) / Bluetooth® transmit (long press) 
5.  Worklight ON/OFF (short press) and backlight ON/OFF (long press) 
6.  Power button (long press ON/OFF) 
7.  Material Group number (short press) and 
o
C, 
o
F, RH% selection (long press) 
8.  Work light 
9.  Battery/USB port compartment lock 
10.  Battery/USB port compartment cover 
Note: Protective cap not pictured