Installation & Operation 1-3
August 2008
Power Connection The PT878 may be powered by either of the following:
• a 100-120/200-260 VAC wall-mount plug-in module
• 5 internal C
s
-size NiCad high-energy rechargeable batteries
• a pack of 3.0 Ahr NiMH batteries
Note: An optional power supplement, part #703-1283, uses 6 AA
alkaline batteries.
Regardless of which power option is chosen, you must connect the
power cord as shown in Figure 1-1 on the previous page.
IMPORTANT: When you receive the PT878, the batteries are not
charged. Therefore, to take measurements on battery
power, you must first charge the batteries as described
on page 1-5.
Transducer Connections The transducer cables connect to the PT878 with LEMO
®
coaxial
type connectors. Each color-coded cable should have a collar labeled
UPSTREAM or DOWNSTREAM. Make transducer cable
connections to the top of the flowmeter as shown in Figure 1-1 on the
previous page. Because there are various types of transducers and
installations, detailed transducer installation is discussed separately in
the Liquid Transducer Installation Guide (916-055).
Input/Output Connections The PT878 provides one 0/4-20 mA current output and two 4-20 mA
analog inputs with switchable 16V supply for loop- powered
temperature transmitters. It also supports digital, frequency, and
totalizer outputs. Connect the inputs/outputs using a LEMO
®
multi-pin connector as shown in Figure 1-1 on the previous page. The
pin numbers for the connector and the color code for the standard
input/output cable are shown in Table 1-1 on the next page.
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