TCPA300 and TCPA400 Amplifier Adjustme nts
TCPA300 and TC
PA400 Amplifier Adjustments
This section
covers the adjustments for the TCPA300 and TCPA 400 Current
Probe Amplifiers.
Required Test Equipment
The adjustment procedures require the test equipment listed below. (See Table 24.)
The test equipment must meet or exceed the specifications listed. You may need
to modify the test procedures if you do not use the recommended equipment.
Table 24: Required test equipment
Qty Item Descript
ion
Recommen
ded
1 Digital Multimeter
0.20%, 3
1
/
2
digit resolution, range ±50 mV
Keithley 2700
1
Curren
tSource
0.1%, 0
to ±100 mA
Fluke 5
100 A or HP 6612C
1 Termination
50 Ω ±0.
1%, 0.5 W
Tektronix part number 011-0129-00
2
BNC Ca
bles
50 Ω,1
.05 m (42 in) long
Tektronix part number 012-0117-00
1
Cable
s
TEKPR
OBE Interface
Tektronix part number 012-1605-00
2 Adapters
BNC-
to-Dual Banana Adapters
Tektronix part number 103-0090-00
1
Cali
bration Adapter
TCPA
Calibration Adapter
Tektronix part number 174-4765-00
1 Adjustment tool
1/8
-inch flat-blade
Tektronix part number 003-0675-01
Accessing the Adjustments
To gain access to the amplifier adjustments, you must remove the outer case.
There are access ports in the right-side internal cover, but you can also remove the
internal cover to get a better view of the adjustments. (See page 62, Disassembly.)
After completing the disassembly procedure, power on the amplifier and test
equipment and let them warm up for at least 20 minutes.
46 TCPA300/400 Amplifiers and TCP300/400 Series Current Probes Service Manual
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