Tektronix TCPA300 SERIES, Instruction Manual

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Reference Notes
TCPA300/400 Amplifiers and TCP300/400 Series Current Probes Instruction Manual
3- 5
0A
Maximum
pulsed
current
Maximum
continuous
current
50%
Pulse width
at 50%
50%
Do Not Exceed
Pulse width
at 50%
I
max
p
I
max
c
(a) Maximum allowable pulse width (b) Maximum allowable pulse amplitude
Figure 3- 3: Applying the amp-second product rule
To determine the maximum allowable pulse amplitude, measure the pulse width
at the 50% points (see Figure 3--3b). Divide the Ampere-second (or Ampere-
microsecond) specification of your probe by the pulse width. The quotient is the
maximum allowable current; the peak amplitude of the measured pulse must be
less than this value.
For example, the TCP312 Current Probe has a maximum Ampere-second
product of 500 A
⋅
s in the 10 A/V range setting. If a pulse measured with a
TCP312 probe has a width of 15 s, the maximum allowable peak current would
be 500 A
⋅
s divided by 15 s, or 33.3 A.
Procedure B