Nanometrics Trillium Compact - Page 74

Symbol Parameter Nominal Values
(120 s model)
Nominal Values
(20 s model)
Units
z
n
Zeros 0
0
-392
-1960
-1490 ±1740i
0
0
-392
-1960
-1490 ±1740i
rad/s
p
n
Poles –0.03691
±0.03702i
–343
-370 ±467i
-836 ±1522i
-4900 ±4700i
-6900
-15000
–0.2214 ±0.2221i
–343
-370 ±467i
-836 ±1522i
-4900 ±4700i
-6900
-15000
rad/s
k
Normalization factor 4.34493 ×10
17
4.34491 ×10
17
(rad/s)
5
f
0
Normalization frequency 1 1 Hz
s
Ground motion sensitivity
at f
0
754.3 753.1 V•s/m
Table 10-1 - Ground motion response nominal parameters for 120 s and 20 s models
The seismometer module sensitivity (s), poles (p
n
), and zeros (z
n
) define the transfer function
according to this equation:
(EQ1)
Where the normalization factor (k) is defined by
(EQ2)
and is given for informational purposes only.
Chapter 10 - Performance
16889R10 • 2020-11-12 Page 74