IPC-TM-650 EN 2022 试验方法1.pdf - 第631页

T a ble 1 Examples for B attery , Dropping Resistor , and Accu racy V R Accuracy 6 600 -0.8% 9 900 -0.6% 12 1200 - 0.4% 24 2400 - 0.2% 48 4800 - 0.1% Figure 3 Simp le Constant Curr ent S ource UUT 0 TO 5 OHMS 10 MA CURRE…

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Figure 1 Test Apparatus
10 MA.
CURRENT
SOURCE
GROUND
REFERENCE
POINT
MILLI-
VOL
T
METER
+
+
+
ELECTRODE
( )
UNIT UNDER
TEST (UUT)
TEST
ELECTRODE ( )
Figure 2 Block Diagram of Test Apparatus
UUT
10 MA
CURRENT
REGULATOR
MILLIVOLT
METER
IPC-TM-650
Number
Subject Date
Revision
Page 2 of 3
Table 1 Examples for Battery, Dropping
Resistor, and Accuracy
V R Accuracy
6 600 -0.8%
9 900 -0.6%
12 1200 -0.4%
24 2400 -0.2%
48 4800 -0.1%
Figure 3 Simple Constant Current Source
UUT
0 TO 5
OHMS
10 MA
CURRENT
R
V
MILLIVOLT
METER
IPC-TM-650
Number
Subject Date
Revision
Page 3 of 3
ANSI/J-STD-001
IPC-TM-650
Page 1 of 4