Installation – American Magnetics 110 Liquid Helium Level Meter (CE-Marked) User Manual
Page 17
7
Installation
Sensor Preparation
where R is the maximum allowable resistance (in ohms) for each lead wire
from the instrument to the sensor, and L is the active length of the
connected helium level sensor in inches. Please note that the maximum
allowable active sensor length for input line voltages less than 99 VAC is
56 inches. Tables for active sensor length vs. lead wire distance are
provided below.
Minimum recommended gauge for stranded, tinned-copper lead wire
for input line voltages greater than or equal to 99 VAC.
Distance
R=329
R=271
R=213
R=155
R=97.5
R=39.6
L=10”
L=20”
L=30”
L=40”
L=50”
L=60”
10 ft.
36 AWG
36 AWG
36 AWG
36 AWG
36 AWG
36 AWG
20 ft.
30 ft.
40 ft.
50 ft.
100 ft.
200 ft.
32 AWG
500 ft.
34 AWG
32 AWG
28 AWG
Minimum recommended gauge for stranded, tinned-copper lead wire
for input line voltages less than 99 VAC.
Distance
R=282
R=224
R=166
R=108
R=50.5
L=10”
L=20”
L=30”
L=40”
L=50”
10 ft.
36 AWG
36 AWG
36 AWG
36 AWG
36 AWG
20 ft.
30 ft.
40 ft.
50 ft.
100 ft.
200 ft.
34 AWG
500 ft.
34 AWG
32 AWG
28 AWG