IPC-TM-650 EN 2022 试验方法1.pdf - 第598页
ASTM-D-257 D-C Resistance or Conductance of Insulating Materials IPC-TM-650 Page 1 of 4
IPC-TM-650
Number
Subject Date
Revision
Page 2 of 2
ASTM-D-257 D-C Resistance or Conductance of Insulating
Materials
IPC-TM-650
Page 1 of 4
Dimension Table
Base
Thickness D
Diameter D Diameter D Diameter D D A(cm ) P/D
Less than
0.51 mm
(0.020 inches)
1.000
(2.540)
1.020
(2.591)
1.375
(3.493)
0.010
(0.025)
0.177
(0.460)
5.169 317.4
±0.005
(0.013)
±0.005
(0.013)
±0.005
(0.013)
±0.001
(0.003)
±0.005
(0.013)
0.51 mm
(0.020 inches)
and greater
2.000
(5.080)
2.500
(6.350)
3.000
(7.520)
0.250
(0.636)
0.250
(0.636)
25.652 28.27
±0.015
(0.038)
±0.015
(0.038)
±0.015
(0.038)
±0.005
(0.038)
±0.015
(0.038)
For the above: Do = (D
+ D )/2
A =
Do
4
P =
D
IPC-TM-650
Number
Subject Date
Revision
Page 2 of 4