AMETEK CTS
BS 200N100
Operating manual
V 1.12
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5.
Calibration / Measuring procedure4
5.1.
Test load CABS 200N
The test impedance CABS 200N, a test load with 0.6
in series with 50
H inductor, is designed for verification the
BS 200N100 acc. ISO 7637-2 standard.
Test load =>
R (total) = 0,6
in series with
L (total) = 50
H (1 kHz)
Both R and L also include the variations of the cable and
the structure. The parallel capacity which cannot be
avoided is approx. 50pF.
Figure 5.1. : Verification setup
Figure 5.2.: Verification setup
5.2.
Test voltage
According to the standard the switch-Off time should be determined under varying test voltages, such as
Va:
U1 = 13.5V and U2 = 27V
Consequently, constant currents of 22.5A or 45A must be considered. The resulting energy consumption at the test
load is:
DC Supply
Power 0.6
13.5 V
304 W
27.0 V
1215 W
5.3.
Switch-Off fall time
The switch-Off fall time is specified as follows (90% to 10%):
ISO 7637 (old version < 1992)
tf = 200 ... 400ns
ISO 7637-2: 2011 and DIN 40839 part 1
tf = 300ns + 20%
specified at 13.5V only
The resulting transients of the BS 200N100 are measured with a 1:200 voltage probe under loaded condition
according the standard. The voltage probe is directly connected to the + and
– output of the generator.
