Tektronix TCPA300 SERIES, Instruction Manual

Page: 112 / 205

TCP305 and TCP312 Performance Verification
5- 22
TCPA300/400 Amplifiers and TCP300/400 Series Current Probes Instruction Manual
Table 5- 12: Equipment settings for DC gain accuracy (Cont.)
Current source
Output Off
TCPA300
Coupling DC
1. Do not clamp the current probe around any conductor, but make sure the
jaws are locked shut.
2. Press the amplifier PROBE DEGAUSS AUTOBALANCE button. Wait for
the degauss/autobalance routine to complete before proceeding. The routine
is complete when the indicator light turns green.
3. Clamp the current probe around the 5 turn current loop, as shown in
Figure 5--7 on page 5--21. Observe and maintain proper polarity; the
arrow-shaped indicator on the probe points away from the (+) terminal of the
current source.
4. For each of the amplifier range settings in Table 5--13, perform the following
steps:
a. Set the amplifier range to the first setting in Table 5--13 for the probe
you are testing. For example, if you are testing a TCP305, set the range
to 5A/V.
b. Set the current source output to the first positive (+) setting in
Table 5--13 for the probe you are testing. For example, if you are testing
a TCP305, set the output to +1.00 A. (Each output level is tested at both
polarities; later in the procedure, you will set the output to --1.00A.)
c. Enable the output of the current source.
d. Record the exact measurement of the digital multimeter as M1.
e. Set the current source output to the first negative (--) setting in
Table 5--13 for the probe you are testing. For example, if you are testing
a TCP305, set the output to --1.00 A.
f. Record the exact measurement of the digital multimeter as M2.
Procedure