TESTEC TT-HVP40 Passive Hochspannungs-Multimetersonde

What accessories are included with the TT-HVP 40 probe?

The probe includes banana plug connectors for multimeter connection, an earth grounding clip with 90cm lead, a screw-in probe tip, and a screw-in hook attachment. The complete package provides everything needed for immediate high voltage measurement capability with your existing multimeter.

What environmental conditions can the probe withstand?

Operating temperature range is 0°C to +50°C, with storage from -20°C to +70°C. The probe operates at altitudes up to 4,600 metres and withstands 80% relative humidity at 40°C. These specifications ensure reliable operation in most industrial and laboratory environments.

How does the probe's high input impedance benefit measurements?

The 1000MΩ input resistance minimises circuit loading, preventing measurement errors and avoiding disruption to sensitive high voltage circuits. This is crucial in power supply testing where loading could affect regulation or cause instability in the circuit under test.

What applications is the TT-HVP 40 best suited for?

Primary applications include power supply output voltage measurement, CRT television EHT testing, high voltage laboratory research, and industrial equipment diagnostics. The probe excels in any situation requiring safe, accurate measurement of high DC or low-frequency AC voltages in energy-limited circuits.

Can this probe measure AC voltages at different frequencies?

Yes, the probe measures AC from DC to 300Hz with specified accuracy. It's optimised for power line frequencies (50/60Hz) where accuracy is ±5%. Response rolls off at higher frequencies, reaching -3dB at 300Hz, making it suitable for most power supply and industrial applications.

What's the difference between 1000:1 and 2000:1 division ratios?

The division ratio depends on your multimeter's input impedance. With 10MΩ multimeters (most common), you get 1000:1 ratio - multiply the reading by 1000. With 1MΩ meters, the ratio becomes 2000:1 - multiply by 2000. This automatic adaptation ensures consistent performance across different equipment.

How accurate are the voltage readings with this probe?

DC accuracy is ±5% from 1kV to 20kV, and ±6% from 20kV to 40kV. AC accuracy is ±5% at 60Hz with bandwidth extending to 300Hz at -3dB. The probe's low temperature coefficient (<200ppm/°C) maintains accuracy across industrial temperature ranges.

What safety precautions must I follow when using this probe?

Always connect the ground clip to a reliable earth before touching the high voltage point. Never remove the ground connection whilst the probe tip contacts high voltage. Inspect the probe for damage before each use, ensure dry conditions, and turn off the high voltage source when possible during connections.

Can I use this probe for mains electrical measurements?

No, the TT-HVP 40 is rated CAT I for energy-limited circuits only. It's designed for power supply testing, CRT servicing, and laboratory applications where high voltage exists but energy is limited. For mains distribution measurements, use appropriately rated CAT II, III, or IV equipment.

What multimeters are compatible with the Testec TT-HVP 40?

The probe works with any digital or analogue multimeter having 10MΩ or 1MΩ input impedance. Most standard bench and handheld multimeters use 10MΩ input resistance, giving a 1000:1 division ratio. The probe automatically provides 2000:1 ratio with 1MΩ impedance meters for consistent accuracy.