Output signal dampening, Read and write to transmitter – Max Machinery 290 Trasmitter Interface User Manual
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IH 290-100-350 • rev. 2/2012 • ©2012 Max Machinery, Inc.
Output Signal Dampening
This feature sets the time constant/cut-off frequency used to filter the raw flow signal. Selecting zero will turn off the
filtering completely. The zero setting can be useful if sudden flow changes need to be measured, or if filtering will be
added after measuring the signal. The time constants and equivalent cut-off frequency for each type of meter are as
follows: (The default setting for all models is 5)
Pulse Output chart
Filter Setting
1
2
3
4
5
6
7
8
9
Time Constant (ms)
0.6
1.7
3.7
7.8
15.6
31.3
62.5
125
250
Cut-off Frequency (Hz)
1700
600
270
128
64
32
16
8
4
Analog Output chart
Filter Setting
0
1
2
3
4
5
6
7
8
9
Time Constant (ms)
0.6
3.7
7.8
15.6
31.3
62.5
125
250 500
1 sec
Cut-off Frequency (Hz)
600
270
128
64
32
16
8
4
2
1
Analog Output chart
(continued)
Filter Setting
10
11
12
13
14
15
Time Constant (ms)
2 sec
4 sec
8 sec
16 sec 32 sec
64 sec
Cut-off Frequency (Hz)
0.5
0.25
0.125
0.062 0.031
0.015
Read and Write to Transmitter
These two buttons allow for reading from or writing to the transmitter. After entering new data into any of the fields, a
Data Changed prompt will be displayed. If you wish to save any entries or selections you have made, you must download
those new settings into the transmitter by pressing the Write to Transmitter button. To discard changes you can select
Read from Transmitter to again upload what is in the transmitter memory.