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September 2004
Wiring the Line Power
(cont.)
Wiring Transducers
1-8
5. Leaving a bit of slack, secure the power line with the cable clamp.
Do not apply power to the AT868 until after the
transducers have been properly wired.
6. Do one of the following:
•
Proceed to another section to continue wiring the AT868.
•
Reinstall the plastic shroud, replace the front cover on the
enclosure and tighten the screws.
Before connecting the transducers, discharge any static
buildup by shorting the center conductor of the transducer
cables to the metal shield on the cable connector.
Note: For transducer frequencies below 2 MHz, the cable lengths
must be within ±4 in. (±10 cm) of each other. If the transducer
frequency exceeds 2 MHz, the cable lengths must be within
±0.5 in. (±1.25 cm) of each other.
1. Locate the CH1 transducer cables and connect them to the two
CH1 transducers. Route the free ends of the cables through the
selected conduit hole in the electronics enclosure.
2. If an optional lightening protector is being installed, connect it
between the meter and the transducers.
3. Refer to the wiring diagram in Figure 1-5 on page 1-16 and
connect the transducer cables to the terminal block labeled DN and
UP for Channel 1. Then, secure the cable clamp.
Note: The RED cable leads are the SIG(+) leads and the BLACK
cable leads are the RTN(-) leads.
Note: The AT868 can use two channels or paths to make more
accurate flow measurements by averaging, subtracting or
adding the the two readings.
Caution!
!WARNING!
Installation
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