August 2008
1-2 Installation & Operation
Making Electrical
Connections
Before taking measurements with the PT878, you must make all the
necessary electrical connections to the unit. This includes:
• power (required)
• transducers (required)
• Input/Output (optional)
• infrared interface (optional)
All electrical connections are made to the top of the PT878 as shown
in Figure 1-1 below.
Figure 1-1: Electrical Connection Locations
!WARNING!
To ensure the safe operation of the PT878, you must
install and operate it as described in this manual. In
addition, be sure to follow all applicable safety codes
and regulations for installing electrical equipment in
your area. The PT878 and its transducers are designed
for use in general-purpose locations only.
Infrared Transceiver
Downstream Transducer
Upstream Transducer
Power
Input/Output
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