TCP303 and TCP404XL Adjustments
TCP303 Procedure
1. Remove the acce
ss plugs that cover the DC gain, 10 μs, and 1 ms adjustments
on the probe.
2. Preset the pro
be adjustments: The adjustment locations are shown. (See
Figure 17 on page 53.) Do this only at the beginning of the probe adjustment
process.
a. Set the 1 ms adjustment fully clockwise.
b. Set the 10 ms
adjustment fully counter-clockwise.
3. Do not clamp the current probe around any conductor, but make sure the
jaws are lo
cked shut.
4. Press the amplifier PROBE DEGAUSS AUTOBALANCE button. Wait for
the degau
ss/autobalance routine to complete before proceeding. The routine
is complete when the indicator light turns green.
5. Connect
the probe to the 1 -turn current loop.
6. Enable the output of the generator.
NOTE. T
he DC gain, 10 μs, and 1 μs adjustments on the TCP303 interact.
Adjusting them can be a repetitive process. You may need to balance between
transient response and gain to meet both specifications at once.
7. Repeat st eps 7 and 8 as necessary to achieve optimum response:
a. Adj
ust the DC gain and 10 ms adjustments to achieve an amplitude of six
divisions and a flat waveform (optimum response).
b. Adj
ust the 1 ms adjustment to achieve a flat waveform (optimum
response).
c. Re
peat step a.
8. Verify the DC gain accuracy of the probe using this procedure. (See page 31,
T
CP303 and TCP404XL Performance Verification.) You may need to make
some minor adjustments to the DC gain adjustment to achieve the highest
accuracy possible.
56 TCPA300/400 Amplifiers and TCP300/400 Series Current Probes Service Manual
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