AVFM 6.1 INSTRUCTION MANUAL
40
APPENDIX A – OPTIONS
EXTRA SENSOR CABLE
(OPTION VXC)
Each AVFM 6.1 flow meter includes 25 ft. (7.6 m), 50 ft. (15 m) or 100 ft. (30 m) tri-coaxial sensor cable. This cable
is shielded from electrical interference and is watertight with a polyurethane jacket. Additional cable and Cable
Junction Box (Option JB2X or JB4X) may be ordered with the flow meter, or the cable may be spliced and
extended up to 500 ft (152 m) total length as required during installation. No adjustment is required when the
sensor cable is extended or shortened. Use only our tri-coaxial VXC shielded cable, or run three RG174U coaxial
cables in a metal conduit.
Extended sensor cable should be installed in rigid metal conduit for mechanical and electrical noise protection.
Recommended installation with a junction box is illustrated below:
62
RG
AU COAXIAL
-
.
MAX TOTAL CABLE LENGTH
500 ft (152m)
62
coaxial
RG
AU
- CONDUIT RECOMMENDED FOR
MECHANICAL PROTECTION
EXTENDED SENSOR CABLE TO
ELECTRONICS ENCLOSURE
TO ULTRASONIC
LEVEL SENSOR
TO VELOCITY SENSOR
SHIELDED COAXIAL PAIR
-
.
MAX TOTAL CABLE LENGTH
500 ft (152m) SHIELDED
COAXIAL PAIR
- METAL CONDUIT RECOMMENDED
FOR MECHANICAL AND
ELECTRICAL-NOISE PROTECTION
EXTENDED SENSOR CABLE
TO ELECTRONICS ENCLOSURE
Downward AVFM
GND
GND
GND
GND
CORE
SHIELD
CORE
SHIELD
B
L
K
W
H
T
/
B
L
K
G
R
N
/
B
L
K
W
H
T
/
B
L
K
G
R
N
/
-
.
MAX TOTAL CABLE LENGTH
500 ft (152m) SHIELDED
TRI-COAXIAL PAIR
- METAL CONDUIT RECOMMENDED
FOR MECHANICAL AND
ELECTRICAL-NOISE PROTECTION
TO SENSOR
EXTENDED SENSOR CABLE
TO ELECTRONICS ENCLOSURE
SHIELDED TRI-COAXIAL PAIR
GND
B
L
K
B
L
K
G
R
N
/
B
L
K
W
H
T
/
B
L
K
B
L
K
W
H
T
/
B
L
K
G
R
N
/
AVFM
