Maintenance Guide
Table Of Contents
l When installing in a high traffic area, Neptune recommends that the dome of the
antenna be recessed in the pit lid as shown in the following figure.
l Recessing the installation reduces the range of the antenna.
Figure 27 – Antenna Placement for High Traffic Areas
Although the CMIU has a cable already attached (2 feet or 6 feet), some installations can
require additional cable. In these cases, the maximum cable length between the encoder
register and the CMIU depends on the register's manufacturer and model. For more
information, see "Encoder Register Interface" on page3.
Encoder Register Maximum Cable Length
Neptune ARB
®
V Meets manufacturer's published
specification for wire length between encoder and remote
receptacle.
300 feet (91 meters)
Neptune ProRead™ / E-CODER
®
500 feet (152 meters)
Sensus Protocol Register 200 feet (61 meters)
Table 8 – Cable Length and Manufacturer
Pit CMIU™ Installation
The following section describes how to install a single CMIU in a pit location.
Select a location for the CMIU that meets the recommendations in the previous section titled
"Site Selection" on the previous page."
Cellular MIU (CMIU™) Pit and Wall Installation and Maintenance Guide 25
Chapter 5: Pit Installation