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Chapter 3
Setting Up Measurements
Table 22 - Maximum frequencies
Hz
CPM
10
(600)
20
(1200)
25
(1500)
32*
(1920)*
40
(2400)
50
(3000)
64*
(3840)*
80
(4800)
100
(6000)
120
(7200)
125
(7500)
(1)
128
(7680)*
150
(9000)
160
(9600)
(1) These values are available in the Dynamix 2500 data collector only in Offroute data collection.
78
Table 21 - Signal Detection Types
Signal
Description
Detection Type
Peak
Use for detection of acceleration, velocity, and high frequency energy. This is the
peak (0 to maximum) amplitude of a sine wave at the frequency of interest and is
calculated from the RMS value.
True Peak
Use to detect impacts and random transients. The dynamic time signal contains
the absolute value of the largest peak (positive or negative) within a specified
time window. Returns a magnitude value only. If used with a spectrum
measurement, the Emonitor software uses a Peak signal detection type instead.
This value is not calculated but is measured directly.
True Peak-Peak
Use to detect impacts and random transients. The dynamic time signal contains
the absolute value of the largest peak to peak distance within a specified time
window. Returns a magnitude value only. If used with a spectrum measurement,
the Emonitor software uses a Peak-Peak signal detection type instead. This value
is not calculated but is measured directly.
Measurement Maximum Frequencies
The measurement maximum frequency is part of the collection specification
(Setup > Collection). See
Select the collection specification when you set up the measurement definition.
The Emonitor software and the Dynamix 2500 data collector support the
following maximum frequencies in Hz (CPM).
Hz
CPM
Hz
200
(12,000)
1100
250
(15,000)
1200
256*
(15,360)*
1250
300
(18,000)
1280*
320
(19,200)
1300
400
(24,000)
1400
500
(30,000)
1500
600
(36,000)
1600
625
(37,500)
1700
640*
(38,400)*
1800
700
(42,000)
1900
800
(48,000)
2000
900
(54,000)
2500
1000
(60,000)
2560*
Rockwell Automation Publication 1441-UM001B-EN-P - September 2012
Collection Specification Dialog Box on page
CPM
Hz
CPM
(66,000)
3000
(180,000)
(72,000)
3125*
(187,500)*
(75,000)
3200
(192,000)
(76,800)*
4000
(240,000)
(78,000)
5000
(300,000)
(84,000)
6000
(360,000)
(90,000)
6250*
(375,000)*
(96,000)
6400
(384,000)
(102,000)
7000
(420,000)
(108,000)
8000
(480,000)
(114,000)
9000
(540,000)
(120,000)
10,000
(600,000)
(150,000)
12,000
(720,000)
(153,600)*
12,500*
(750,000)*
75.
Hz
CPM
12,800*
(768,000)*
13,000
(780,000)
15,000
(900,000)
16,000
(960,000)
18,000
(1,080,000
20,000
(1,200,000)
25,000
(1,500,000)
30,000
(1,800,000)
32,000*
(1,920,000)*
40,000
(2,400,000)
80,000
(4,800,000)
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