Rockwell Automation 44887-PUB, 44887 Enwatch - Manual (Page 25)

Publication GMSI10-UM031C-EN-E - January 2009
Installing the Enwatch 21
Enwatch Measurement
Capabilities This section lists the measurement capabilities of the Enwatch unit.
Table 1.16 Enwatch measurement capabilities
Product Feature Capability
Signal Control Raw input signal
Integrated input signal via HP filter
Hp filter input signal
gSE 200 Hz input signal
gSE 5000 Hz input signal
Bias Voltage
Combining measurements in the Enwatch
driver The Enwatch driver can combine measurements at the same location in Emonitor. The
following items must to be the same to combine measurements.
Signal route control (Integrate/non integrate/gSE/Raw)
Tachometer on/off
gSE time constant
Sample rate/maximum frequency
Phase lock loop
Number of averages
Measurement filter
Number of lines
How does the Enwatch driver choose the
high pass filter? X=2 x FMAX/lines
If X > 5.3 then set to 23.8
else if X > 2.67 set to 5.3
else if X > 0.36 set to 2.67
else if the Smart HP filter is on in Emonitor, then set to 2.67, otherwise set to 0.36
Note: The Smart HP filter in Emonitor does not use 0.36Hz HP filter.
Trigger usage Sample on trigger (the first version of Enwatch always uses this option)
Sample on post-trigger
Sample on pre-trigger
Tachometer usage Use tachometer for PLL (phase loop locked)
Autorange Always on, maximum input ±10 V
Integrator reset control Reset before first sampling of a measurement