GE General Electric Oxygen Equipment PT878 用户手册

Appendix C. Temperature Transmitter Installation

Transport® Model PT878 Portable Liquid Flowmeter User’s Manual

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Use the steps below to fasten the RTD to the pipe:

Prepare the pipe where you intend to place the RTD. The area should be 
clean and free of loose material.

Apply couplant (GE part number 401-001) to the copper face of the 
RTD. Use enough couplant to cover the face of the RTD, but not so 
much that the couplant oozes out from underneath.

Position the RTD on the pipe and wrap the clamping fixture around the 
pipe.

To secure the RTD, you place the feeder buckle into the screw buckle 
and use a screwdriver to tighten. Turn the screw clockwise until the 
strap is set securely against the RTD.

Proceed to the following section to make electrical connections.

The PT878 will not accept a signal directly from the RTD; therefore, you 
must have some type of 4 to 20-mA transmitter. The factory supplies a dual 
transmitter (DTR) with a special LEMO connector that attaches to the 
PT878. The PT878 supplies power to the DTR using an internal 16 V 
supply. If you decide to supply your own transmitter, you can use the 16 V 
supply to power your transmitter; however, you will need to order the 
special LEMO connector cable to connect your transmitter to the PT878.

To make electrical connections, you must connect the RTD sensor to the 4 
to 20-mA transmitter, and then connect the DTR to the PT878. Use the 
following sections to make electrical connections.