TEKTRONIX P6022 Current Probe

Auxiliary accessories BNC "T" type adapter, 50 Ω precision coaxial cable (36 inches), BNC to double banana head adapter, calibration fixture Tektronix corresponding models (see Table 6)

2. Core validation projects (including calculation methods)

(1) Mid frequency accuracy test (50 kHz)

Qualification criteria for step calculation method

1. Set the terminal to 1 mA/mV, calibrate the generator output to 50 kHz, 5 V p-p, connect BNC "T" → DMM, record the reading M1 I test=M1/50 Ω (test current). 2. Disconnect the DMM from "T", connect the probe+terminal, calibrate the probe clamp fixture, record the DMM reading M2% Error=[(M2 − I test)/I test] × 100 ± 3%

3. Set the terminal to 10 mA/mV, repeat step 2, and record the DMM reading M3% Error=[(10 × M3 − I test)/I test] × 100 ± 3%

(2) Low frequency bandwidth test

Qualification criteria for sensitivity gear step calculation method

1 mA/mV 1. Measure the output M1 at 50 kHz; 2. Set the generator to 8.5 kHz and measure the output M2 low-frequency ratio=M2/M1 ≥ 0.707

10 mA/mV 1. Measure the output of M3 at 50 kHz; 2. Set the generator to 935 Hz and measure the low frequency ratio of M4 output=M4/M3 ≥ 0.707

(3) High frequency bandwidth testing

Qualification criteria for sensitivity gear step calculation method

1 mA/mV. Set the oscilloscope to 20 mV/div and measure the amplitude M1 at 50 kHz. 2. Set the generator to 100 MHz and measure the amplitude M2. High frequency ratio=M2/M1 ≥ 0.707

10 mA/mV. 1. Set the oscilloscope to 2 mV/div and measure the amplitude M3 at 50 kHz. 2. Set the generator to 120 MHz and measure the amplitude M4. High frequency ratio=M4/M3 ≥ 0.707

3. Calibration adjustment (if verification fails)

Remove terminal cover: Use a small screwdriver to gently pry open the top snap cover of the terminal (keep the bottom cover).

Oscilloscope settings: CH1, DC coupling, 2 mV/div, 4-5 ns/div, average 5-10 times, trigger set AC, positive slope.

Adjust parameters: calibrate the generator to output a 1 V p-p fast edge signal and connect it to the calibration fixture; Adjust the C28 and C29 capacitors of the terminal and the R10 resistance of the probe to minimize waveform distortion and ensure optimal flat top response.

Maintenance and Repair

1. Daily maintenance

Cleaning: Wipe the probe body with a damp cloth; Clean the magnetic core with cotton swabs soaked in isopropanol (solvents such as benzene, toluene, acetone, etc. are prohibited); Do not soak or use abrasives.

Lubrication: The slider component can only be coated with a small amount of silicon-based grease, and petroleum based grease is prohibited; Lubrication is prohibited on the contact surface of the magnetic core.

Inspection: Regularly check the wear of the slider and the cleanliness of the magnetic core contact surface (dirt can reduce low-frequency response).

2. Disassembly and maintenance

(1) Probe disassembly (requires soldering iron)

Pull back the strain relief boot, gently pry on the probe body and remove it forward.

Take out the ball bearing and spring retainer, and remove the upper half of the slider, spring, and transformer.

Remove the grounding terminal of the circuit board and gently remove the circuit board, transformer, and cable components (to avoid damaging the cable solder joints).

(2) Terminal maintenance

Replace connector: remove cover → protect circuit with heat sink → solder off old connector → replace with new connector → solder reset.

Replace the circuit board: Remove the front and rear covers → solder off the connector wires → remove the circuit board screws → assemble in reverse after replacement.

3. List of replaceable parts (core)

Electrical components (excerpt from Table 10)

Component Number Tektronix Part Number Name and Description

A1 670-1112-00 Probe Circuit Board Component

A2 011-0106-00 P6022 Coaxial Terminal

A1T1 120-0603-00 Current Transformer

A2C28/A2C29 281-0123-00 Variable capacitor (5-25 PF, 100 V)

Mechanical components (excerpt from Table 11)

Drawing number/index Tektronix part number name and description quantity

12-1 204-0360-01 Probe Upper Shell 1

12-3 351-0174-00 Probe Slide (Acetal Material) 1

12-9 175-1027-00 RF Cable Assembly (62.5 Ω, 60 inches) 1

12-18 196-3120-01 Probe Grounding Wire (23 AWG, 6 inches) 1