
6 
 
 
 
 
 
 
 
 
 
 
Figure 2: Inside configuration. Refer to drawing MTM-308-1 for field wiring requirements for external 
power and modem connections to maintain intrinsic safety. 
Primary 
battery 
Earth 
Ground 
Stud 
Back up battery 
(under cover) 
Reversible gears for 
adapting to CW or CCW 
rotating meters