Max Machinery 284-512 SERIES TRANSMITTERS - Manual (Page 7)

284-512-350 © 1990 (Rev 6/97) Max Machinery, Inc. Page 7
Signal Transmission Data
Figure 8 is a graph which
indicates typical conductor
capacitance loads versus cable
length for several types of
cable. For instance, 1000 ft. of
7 conductor # 18 gauge
stranded wire will put a 0.04
µ
f
capacitive load on the output of
the 284-512 series transmitters.
Figure 9 provides the
relationship between output
capacitance loading and rise
and fall time for the 284-512
output signal. For instance, at
0.04
µ
f, the rise time of the 284
is about 18
µ
sec, the fall time
is about 8.5
µ
sec.
Consequently, the absolute
maximum frequency the 284
could transmit would be 26.5
µ
sec = 37,736 Hz (frequency =
1/time). This frequency is well
above what any flow meter will
develop.
Generally, the 284-512 Series
transmitters will drive 1000
feet or more of cable with no
problem.
Signal Transmission Data
Discontinued