TESTEC Elektronik GmbH
Testec TT-HVP 40 High Voltage Passive Probe 40kV DC/28kV AC
Testec TT-HVP 40 High Voltage Passive Probe 40kV DC/28kV AC
SKU: 15001
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Key Features
Overview
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Why Engineers Choose The Testec TT-HVP 40 High Voltage Passive Probe 40kV DC/28kV AC
Professional Grade Accuracy
Enhanced Safety Protection
Universal Multimeter Compatibility
Professional High Voltage Measurement for Multimeters
The Testec TT-HVP 40 is a precision-engineered high voltage passive probe designed specifically for safe measurement of extreme voltages using standard digital multimeters. This probe extends your multimeter's measurement capability to 40kV DC and 28kV AC RMS, making it indispensable for power supply testing, CRT television servicing, and industrial high voltage diagnostics.
Resistive Divider Technology
Built around a proven 1000:1 resistive divider circuit, the TT-HVP 40 uses high-precision 1000MΩ input resistance to minimise circuit loading whilst maintaining measurement accuracy. When connected to 10MΩ multimeters, the probe provides a 1000:1 division ratio. For 1MΩ input impedance instruments, the ratio becomes 2000:1, offering versatility across different measurement equipment.
| Parameter | Value | Notes |
|---|---|---|
| Max DC Input | 40kV | ±5% accuracy (1-20kV), ±6% (20-40kV) |
| Max AC Input | 28kV RMS | 0-300Hz, ±5% at 60Hz |
| Input Resistance | 1000MΩ | Minimal circuit loading |
| Temperature Coefficient | <200ppm/°C | Excellent thermal stability |
Safety Features
Safety is paramount in high voltage measurement. The TT-HVP 40 incorporates multiple protective features including CAT I overvoltage protection, reinforced insulation, and a mandatory grounding connection via the supplied earth clip. The probe body features robust environmental ratings, operating from 0°C to +50°C and withstanding humidity up to 80% at 40°C.
Wiring Quick-Start
Connection is straightforward using standard 4mm banana plugs:
1. Connect probe's banana plugs to multimeter V+ and COM terminals 2. Set multimeter to appropriate DC or AC voltage range (disable autoranging) 3. Connect ground clip to reliable earth/chassis ground BEFORE touching high voltage 4. Place probe tip on measurement point 5. Read multimeter value and multiply by division ratio (1000:1 or 2000:1) 6. Remove probe tip BEFORE disconnecting ground clip Applications
- Power Supply Testing: Measuring output voltages in high voltage DC-DC converters
- CRT Television Servicing: Testing EHT (Extra High Tension) voltages up to 40kV
- Industrial Equipment: Measuring high voltage rails in manufacturing equipment
- Laboratory Research: Precision measurements in high voltage research applications
| General Information | |
|---|---|
Part Number (SKU) |
15001
|
Manufacturer |
TESTEC Elektronik GmbH
|
| Physical and Mechanical | |
Weight |
1.5 kg
|
| Other | |
EAN |
5055383622740
|
Questions and Answers
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Can This Probe Measure AC Voltages at Different Frequencies?
Yes, from DC to 300Hz. Accuracy is ±5% at 60Hz. The response rolls off at higher frequencies, reaching -3dB at 300Hz.
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What Applications Is the TT-HVP 40 Best Suited For?
Typical uses for a high-voltage probe of this type:
- Power supply output voltage measurement
- CRT television EHT testing
- High voltage laboratory research
- Industrial equipment diagnostics
It suits high-voltage DC or low-frequency AC (up to 300Hz) measurements made with a multimeter.
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How Does the Probe's High Input Impedance Benefit Measurements?
The 1000MΩ input resistance keeps circuit loading low, which reduces measurement errors and avoids disturbing sensitive high-voltage circuits. This matters in power supply testing, where loading could affect the circuit under test.
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What Environmental Conditions Can the Probe Withstand?
- Operating temperature: 0°C to +50°C
- Storage temperature: -20°C to +70°C
- Altitude: up to 4,600 metres
- Humidity: up to 80% relative humidity at 40°C
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What Accessories Are Included with the TT-HVP 40 Probe?
The Testec manual describes these parts:
- Connecting plugs for the multimeter's Hi and COM terminals
- Ground lead with alligator clip
- Probe tip
- 1 m cable
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What Multimeters Are Compatible with the Testec TT-HVP 40?
The probe is designed for analogue or digital multimeters with 10MΩ input resistance, which gives a 1000:1 division ratio. Most digital multimeters have a 10MΩ input. With a 1MΩ meter the ratio becomes 2000:1.
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Can I Use This Probe for Mains Electrical Measurements?
No. The TT-HVP 40 has no rated measurement category and is not rated for CAT II, III or IV, so don't use it for mains measurements. It is a high-voltage DC and low-frequency AC probe. For mains distribution measurements, use equipment rated for the category you are working in.
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What Safety Precautions Must I Follow When Using This Probe?
- Only trained personnel should use the probe, and never work alone.
- Always connect the ground clip to a reliable earth before touching the high-voltage point.
- Never remove the ground connection while the probe tip is on high voltage.
- Inspect the probe for damage before each use.
- Make sure conditions are dry.
- Turn off the high-voltage source during connections where possible.
- Set the multimeter range manually. Don't use autoranging.
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How Accurate Are the Voltage Readings with This Probe?
- DC: ±5% from 1kV to 20kV, ±6% from 20kV to 40kV.
- AC: ±5% at 60Hz, with bandwidth to 300Hz at -3dB.
- Temperature coefficient: <200ppm/°C.
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What's the Difference Between 1000:1 and 2000:1 Division Ratios?
It depends on your multimeter's input impedance. With a 10MΩ meter (most common) the ratio is 1000:1, so multiply the reading by 1000. With a 1MΩ meter it's 2000:1, so multiply by 2000.
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