Max Machinery 286-300 SERIES TRANSMITTERS - Manual (Page 12)

Maximum Transmission Distance (continued)
The graph below shows the relationship between output capacitance loading and rise and fall time for
the Model 286-3XX output signal. For instance, with 0.04uF load capacitance (1000 ft. shielded cable typ.)
the rise/fall time is 10 uS. Consequently, the absolute maximum frequency the Model 286 could transmit
would be 50 kHz (frequency = 1/time, where time includes the rise and fall times for one cycle). See
following page for maximum frequencies possible with different flow meters.
286-300-350 © 2002, Max Machinery, Inc. (12)
286-313 Output Rise and Fall Time vs. Load Capacitance
0.1
1
10
100
1000
0.001 0.01 0.1 1
Output Capacitance Load (uF)
R
ise
and
F
al
l
T
im
e
(uS
)
(rise and fall time measured between 10% and 90% of full output swing)
Maximum Transmission Distance
Discontinued