Dynasonics TFXP Series Transit Time Ultrasonic Flow Meter Manuel d'utilisateur télécharger pdf (Page 13)

Rev. 5/09 -1.11- TFXP

1. The connectors located on the side of the TFXP consist of three

1/4-turn BNC-type and one 5.5 mm power plug. These

connectors are environmentally sealed, but it is recommended

not to allow water or other liquids to collect in the electrical

connections pocket.

2. Connect the appropriate wires to the corresponding connections

on the transmitter. The transducer cable has markings of

UPSTREAM and DOWNSTREAM to assist in the installation

process. The UPSTREAM transducer is the one located closer

to the direction from which fluid flow normally comes from. (The

fluid normally passes the UPSTREAM transducer before passing

the DOWNSTREAM transducer.) If the transducer wires are

connected backwards, a negative flow indication will be

observed on the flow meter display. See Figure 1.5 or the wiring

diagram located on the inner door of the transmitter.

NOTE: The transducer cable carries low level, high frequency

signals. In general, it is not recommended to add additional cable to

the cable supplied with the DTTN, DTTH, DTTS or DTTC

transducers. If additional cable is required, contact the Dynasonics

factory to arrange an exchange for a transducer with the appropriate

length of cable. Cables to 990 feet (300 meters) are available. If

additional

cable and connections are added, ensure that they

are RG59 75

Ohm compatible.

PART 1 - TFXP TRANSMITTER CONNECTIONS

Electrical

Connections

It is highly recommended that the internal battery in the TFXP be

fully charged before using the meter for the first time. Details

covering this procedure are located on page 1.1 of this manual.

Figure 1.5 — Transmitter Connections

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Dynasonics TFXP Series Transit Time Ultrasonic Flow Meter Manuel d'utilisateur Page 13