TCPA300 and TCPA400 Performance Verification
5-4
TCPA300/400 Amplifiers and TCP300/400 Series Current Probes Instruction Manual
Making DC Current Loops
You need to construct simple current loops to complete some tests for the
amplifiers. The current loops are also used in the DC gain accuracy tests for the
probes.
Construct the loop using a cylindrical form approximately 3 inches in diameter:
1. Wind exactly 5 turns of #18 coated wire around the form.
2. Scrape about a half-inch of coating off of the ends of the wire.
NOTE. Ensure that the current loop has exactly 5 turns. A significant error will
result for each turn variance from 5 turns.
The 5-turn DC current loop is also used in the current probe performance
verification and adjustment procedures.
Construct the loop using a cylindrical form approximately 3 inches in diameter:
1. Wind exactly 50 turns of #13 coated wire around the form.
2. Scrape about a half-inch of coating off of the ends of the wire.
NOTE. Ensure that the current loop has exactly 50 turns. A significant error will
result for each turn variance from 50 turns.
The 50-turn DC current loop is also used in the current probe performance
verification procedures.
5-Turn DC Current Loop
50-Turn DC Current Loop
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