User's Manual

The AC-250 RMD unit consists of a control module and
an integrated valve which are housed in an extended
top attached to the AC-250 meter (Figure 1).
Installing in a hazardous location
Note: The AC-250 RMD is intended for hazardous locations
Class I, Division I, Group D. Temp Code: T4; -30 ºC to 60 ºC.
Note: The AC-250 RMD battery is non-replaceable. If battery
replacement is necessary, a new control module is required.
Note: Substitution of components may impair intrinsic safety.
Figure 1. AC-250 RMD (Remote Meter Disconnect)
The Elster American Meter AC-250 RMD (Remote Meter Disconnect) provides a safe, secure, and cost-effective
way to enhance operational efciencies and drive revenue recovery when meter access is not a readily
available option. The AC-250 RMD enables utilities to have remote access and control of the natural gas ow
when immediate action is required. This device ts neatly within an extended meter top and provides additional
enhanced functionality to the outstanding performance of the AC-250 gas meter.
AC-250 Remote Meter Disconnect
Installation Information
control module/antenna
extended top
AC-250 gas meter
WARNING
!
A hazardous location includes areas where re or explosion hazards may exist due to ammable gases, liquids, dust, etc. To prevent
personal injury, all standard, necessary precautions should be taken when working in a hazardous environment.
Enclosure contains aluminum: Care must be taken to avoid ignition hazards due to impact or friction.
ESD ignition hazard: When handling the AC-250 RMD, care must be taken to prevent electrostatic discharge in the
presence of natural gas. When removing the module for servicing, do so only while wearing insulating materials
such as rubber gloves.
!
WARNING
!
WARNING
!