The Fluke 80K-40 High Voltage Probe extends the voltage measurement capability of AC/DC voltmeters and multimeters to 40 kV DC or peak AC. Operating as a precision 1000:1 passive voltage divider with 1000 MΩ input impedance, this probe minimizes circuit loading and delivers accurate readings in low-energy applications including CRT circuits, televisions, and photocopiers. It is not suitable for power distribution system measurements.
## Technical Specifications
**Voltage Range**
• 1 kV to 40 kV DC or peak AC
• 28 kV AC RMS
**DC Accuracy**
• ±1% from 20 kV to 35 kV at 20°C to 30°C
• ±2% from 0 kV to 35 kV to 40 kV
• Add ±1% for 10°C to 30°C to 45°C when measuring 20 kV to 35 kV DC
**AC Accuracy**
• ±5% at 60 Hz
**Electrical Characteristics**
• Input impedance: 1000 MΩ
• Division ratio: 1000:1
• Circuit loading: 1 µA per 1 kV
• Required meter input impedance: 10 MΩ ±1.0%
**Safety Rating**
• IEC 61010-2-031:1993, Type B, Overvoltage Category I
• Altitude derating: Above 2000 m to 5000 m, working voltage derates linearly from 40 kV peak to 28 kV peak; transient overvoltage derates from 80 kV peak to 57 kV peak
## Key Features
• High input impedance minimizes measurement circuit loading and distortion
• Precision matched-resistor voltage divider for stable performance
• Integrated safety guard protects user during high-voltage measurement
• Insulated plastic housing provides electrical isolation
• Dual banana plug connectors (0.75″ spacing, 0.160″ plugs) with earth ground clip lead
## Typical Applications
Low-energy high-voltage measurement in CRT displays, television circuits, photocopier systems, and similar enclosed environments where voltages to 40 kV require accurate characterization.
## Compatibility & Integration
Achieves rated accuracy with AC/DC voltmeters and multimeters having 10 MΩ ±1.0% input impedance. Compatible with Fluke and most standard DMM models. Operation requires dry conditions (no condensation) within specified temperature ranges.
