TG20 SERIES DIGITAL
SEISMIC GEOPHONE
Specification
(at 22 ¡æ)
|
Type
|
TG20-3
|
TG20-4.5
|
TG20-8
|
TG20-10
|
TG20-14
|
TG20-28
|
TG20-40
|
TG20-60
|
TG20-100
|
precision
|
Natural
Frequency (HZ)
|
3
|
4.5
|
8
|
10
|
14
|
28
|
40
|
60
|
100
|
¡À5%
|
Damping
with shunt resistor
|
0.7
|
0.75
(8.2K)
|
0.7
(1K)
|
0.7
(1K)
|
0.5
(1K)
|
0.56
(1K)
|
0.576
(1.5K)
|
0.6
(1K)
|
0.68
(1.5K)
|
¡À5%
|
Sensitivity
with shunt resistor V/M/S
|
27
|
23.5
(8.2K)
|
23
(1K)
|
20
(1K)
|
20
(1K)
|
28
(1K)
|
30.4
(1.5K)
|
22
(1K)
|
32.5
(1.5K)
|
¡À5%
|
Harmonic
distortion %
|
<0.2
|
Coil
resistor ¦¸
|
395
|
575
|
560
|
820
|
¡À5%
|
Coil
Resistance ¦¸
|
395
|
377
|
283
|
520
|
360
|
530
|
¡À5%
|
Moving
mass g
|
11
|
8.2
|
7
|
7.6
|
/
|
Typical
case to coil motion p-p mm
|
1.5(p-p)
|
/
|
Allowable
tilt
|
10
|
20
|
90
|
/
|
Spurious
frequency HZ
|
>100
|
>180
|
>200
|
>250
|
>350
|
>380
|
>600
|
>800
|
/
|
Operating
temperature ¡æ
|
©\40
¡« + 90
|
/
|
Unit
diameter mm
|
25.4
|
27.0
|
/
|
Unit
height mm
|
33.5
|
/
|
Unit
mass g
|
87
|
100
|
95
|
100
|
100
|
/
|
Life
warranty (years)
|
1
|
3
|
2
|
/
|
Characteristics
TOP¡ü |
|
|