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September 2004
1-8
Installation
Wiring the Line Power
(cont.)
5.
Leaving a bit of slack, secure the power line with the cable clamp.
Caution!
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.
Wiring Transducers
!WARNING!
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.
Summary of Contents for AquaTrans AT868
Page 7: ...Chapter 1...
Page 25: ...Chapter 2...
Page 45: ...Chapter 3...
Page 50: ...Chapter 4...
Page 56: ...Appendix A...
Page 62: ...Appendix B...
Page 63: ...Measuring P and L Dimensions Measuring P and L B 1...