← All activities
The 4 to 20 mA loop
Step 1
tank
level 50 %
level transmitter
two wire, loop powered
12.0 mA
it regulates the current in the loop
two conductors,
300 m
cut
R
20 Ω
24 V
supply
+
power
at the tx
Controller analog input
250 Ω
3.00 V
ADC
16 bit
9830 counts
350 GPM
y = (700/13107)x − 175
loop current, mA
tank level, percent
Tank level:
50
percent
Condition of the cable
Signal standard
Cable run:
300
m, at 3.3 Ω per 100 m per conductor
Converter resolution
Transmitter type
Process variable
50 %
Loop current
12.00 mA
Across the 250 Ω resistor
3.00 V
Converter counts
—
One count is worth
—
Scaled value
—
← Back
Next →