This high voltage probe is a passive 100:1 oscilloscope probe in two models: the P4100 (100MHz, 2 kV printed on the connector) and the T3100 (DC to 120MHz, under 2000 V DC + peak AC on its spec sheet). It divides the signal by 100, so a scope with a BNC input can show voltages above the rating of a standard 10X probe.
Features and Benefits
- 100:1 attenuation - set the channel to 100X and the screen reads the real voltage at the tip
- 100 MΩ input resistance on both models - light loading on the circuit under test
- P4100: 100MHz, 3.5ns rise time, 6 pF input capacitance - low capacitance for clean edges
- T3100: DC to 120MHz, 2.9ns rise time in the supplier table - more bandwidth headroom and a 120 cm cable
- Adjustable compensation, 10 to 35 pF (P4100) or 15 to 35 pF (T3100) - match the probe to your scope with the supplied screwdriver
- P4100 accessories: screwdriver, 8 colour marker rings, 2 tip positioning sleeves, spring and user manual - ready for the bench and easy to tag by channel
Applications
- Electronics repair benches: viewing high voltage waveforms within the probe rating on scopes with BNC inputs
- Test and development labs: a 100:1 probe alongside standard 10X probes for signals above their rating
- Multi channel measurements: colour marker rings show which probe is on which channel
Note: Power down the circuit before connecting or moving the probe, and clip the ground lead to circuit ground only, as it is common with the scope ground. Stay within the rating of your model, working to the lower figure where the supplier gives two, and confirm zero volts with a meter before touching the circuit.
Type: Passive 100:1 high voltage oscilloscope probe. Models: P4100 or T3100. Attenuation: 100:1 (100X). Bandwidth: P4100: 100MHz; T3100: DC to 120MHz. Max input voltage, P4100: 2 kV DC + AC peak, printed on the probe; the supplier text also lists 1000 V DC + AC peak to peak. Max input voltage, T3100: Under 2000 V DC + peak AC on the spec sheet; 2500 V in the supplier comparison table. Input resistance: 100 MΩ (both models). Input capacitance: P4100: 6 pF; T3100: 14.5 to 17.5 pF. Compensation range: P4100: 10 to 35 pF; T3100: 15 to 35 pF. Rise time: P4100: 3.5ns; T3100: 2.9ns (supplier table). Connector: BNC. Cable length: P4100: 1.1 m (116 cm on the dimension drawing); T3100: 120 cm. In the box, P4100: Probe with ground lead, adjustment screwdriver, 8 colour marker rings, 2 tip positioning sleeves, 1 spring, user manual. Housing: P4100: black ABS with red connector housing. P4100 dimensions: Probe body 185 mm, connector housing 91 mm, adjustment tool 75 mm. T3100 net weight: Under 65 g. T3100 operating temperature: -10 to 50℃. T3100 storage temperature: -20 to 75℃. T3100 humidity: Up to 85% relative humidity. T3100 in the box: Pictured with the same accessory set (screwdriver, marker rings, tip sleeves, spring) and a user's guide. Markings: Model, ratio, bandwidth and voltage printed on the connector housing; CE mark on the P4100 housing. Q: What is a high voltage probe used for? A: It lets an oscilloscope display voltages above the rating of a standard 10X probe by dividing the signal by 100 before it reaches the scope input. The P4100 is rated 2 kV and the T3100 under 2000 V DC + peak AC on its spec sheet.. Q: What is the difference between the P4100 and T3100 probes? A: The P4100 has 100MHz bandwidth, 6 pF input capacitance and a 10 to 35 pF compensation range. The T3100 has DC to 120MHz bandwidth, 14.5 to 17.5 pF input capacitance, a 15 to 35 pF compensation range and a 120 cm cable.. Q: Will this oscilloscope probe fit my scope? A: Both models end in a BNC connector. Check that your oscilloscope's input capacitance falls inside the compensation range of the model you choose so the probe can be matched to it.. Q: How do you compensate a 100:1 oscilloscope probe? A: Connect the probe to the scope's calibration square wave output and turn the compensation trimmer with the supplied screwdriver until the square wave has flat tops with no overshoot or rounding.. Q: How do I read the true voltage with a 100X probe? A: Set the probe factor on the oscilloscope channel to 100X. The screen then shows the actual voltage at the probe tip instead of one hundredth of it.. Q: Can a high voltage probe discharge a capacitor? A: No. This probe only measures voltage. Discharge capacitors with a dedicated capacitor discharge tool, then confirm zero volts with a meter..