RLE LD5200 V.2.3 - Manual (Page 26)

26 LD5200 User Guide 800.518.1519
2 Installation
5 To calculate the most accurate resistance value for the system, divide the reported cable
length by the actual cable length, and multiply the quotient by the reported resistance.
For example:
One 15 foot leader cable (leader cable does not count toward the total length of cable
installed), one weighted cable connector (simulates 50 feet of cable), and one 330 foot
section of cable are connected to the system.
The actual resistance of the cable installed with this LD5200 is 2.881 ohms per foot.
6 Replace the resistance per foot setting in the LD5200 with this newly calculated value. This
can be edited on the Leak Configuration page of the web interface (Configuration > Leak
Settings) or on the Leak Settings screen of the LCD (Setup > Leak Settings).
When using the web interface, remember to click the Submit Changes button to save the
adjusted resistance value.
In our example, adjusting the resistance value changed the reported cable length from 391
feet to 380 feet. This improves the accuracy of the system because the reported cable length
more closely matches the physical length of cable connected to the system.
Cable Length (as reported by the LD5200) 391 feet
Cable Current 0 μA
Leg 1 Resistance 1088 Ohms
Leg 2 Resistance 1095 Ohms
Reported Resistance 2.800 Ohms/foot
Actual length of cable connected to LD5200
0 feet + 50 feet + 330 feet
380 feet