Ca Libration Head Type; Notes To Specifications - BRUEL & KJAER System V Instruction Manual

9.3.5. Calibration Haad Type 4815
Ratad Force:
Dynamic:
Acceleration Limit:
(bare table)
Current Limit:
D isplacement Limit:
Velocity Limit:
M oving Element Dyn amic
Mass:
Resonance Frequency Unloaded
Table:
Stray M agnetic Field:
M ounting Surface :
Cross Motion :
Flexure Stiffness:
Head Constant:
Dimensions:
Weight:
Accessories Supplied:
1 Type 8305 Accelerometer
1xDC0174
1 bottle OS 0003
1 x QA 0009
1 x QA 0043
1 xQA 0065
4xYO 0723
4xY00927
380 N (85Ibf) when mounted on the 4801 Body
267 N (60 Ibf) when mounted on the 4805 Body
1190 m
/ s
2
when mounted on the 4801 Body
785 m / s
2
when mounted on the 4805 Body
20 A RMS, with cooling
10 ARMS without cooling
12,7 mm, (0,5 in) continuous
14 mm, (0,55 in), between stops
1,0 m / s, (40 in / s)
0,34 kg , (0 , 75Ib)
12,5 kHz
See curves, Figs.6.14, 6 . 15
Stainless steel Reference Accelerometer , 15,8 mm , (0,622 in) diame ­
ter, tapped for 10- 32 mounting stud . Electrically isolated from Head
Less than 3% of the axial motion to 2 kHz. See also Fig.7.13
5,2 N/ mm, (30 Ibflin)
69 mm/Vs (2,7 in / Vs)
235 mm (9,3 in) dia, 157 mm (6,2 in) high excluding Type 8305
6,7kg, (14,9Ib) excluding Type 8305
Mounting block
Thread locking cement, LOCTITE screw lock
Hexagonal wrench, 1/8"
Hexagonal wrench, 2 mm
Hexagonal wrench, 1,27 mm
Screw, 1,4 mm diameter, 0,3 pitch
Screw 2 , 5 mm diameter, 0,45 p itch
9. 4 .
N OTES TO SPECIFICATIONS
1. Specifications valid for 1) Mains voltages w ithin + 5% . 2) Altitude from sea level to
500 m (1600 f t). 3) Ambient Temperature not higher than 40° C (104 ° F). 4) Zero
static force for table centring . 5) Standard base (T) only.
For ambient temperature T
A
above 40°C ( 104°F). and /o r a lt itudes exceeding 500 m
above sea level, the rate d dynamic force (a nd
drive cu rrent limit) is reduced by multi ­
plying by the following factor for the Exciter Head in use:
62