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Fluke
Fluke 85RF II High Frequency Probe
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RF probe 100 kHz–500 MHz; 0.25–30 Vrms; into 10 MΩ DMM. RFQ + selection help.
Download datasheet PDF
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Key parameters
Measuring range
0.25–30 Vrms RF AC (1:1 AC-to-DC conversion into 10 MΩ DC voltmeter)
Accuracy
Ratio accuracy at 25 MHz into 10 MΩ: ±0.5 dB above 0.5 V; ±1.0 dB below 0.5 V
Output
DC voltage equal to rms sine input (dual banana into DMM)
Supply
Passive probe (powered by host DMM input)
Electrical connection
Dual banana output for 10 MΩ ±10% DC voltmeter; ~9 pF input capacitance
Sensor type
High-frequency RF probe (100 kHz–500 MHz)
Fits RF AC voltage measurement on a DMM where you need a Fluke 85RF II converting 0.25–30 Vrms (100 kHz–500 MHz) to DC into a 10 MΩ voltmeter with ±0.5 dB class ratio accuracy at 25 MHz above 0.5 V.
Key advantages
- RF range — 0.25–30 Vrms; 100 kHz–500 MHz class
- Conversion — 1:1 AC-to-DC into 10 MΩ DC voltmeter
- Accuracy — ±0.5 dB above 0.5 V at 25 MHz; ±1.0 dB below 0.5 V
- Output — Dual banana into DMM; ~9 pF input capacitance
- Form — Passive RF probe powered by host DMM
Typical applications
- RF signal level checks with a DMM.
- Bench HF voltage troubleshooting.
- Service work needing 500 MHz-class probe.
Selection guide
- Host DMM — 10 MΩ ±10% input
- Voltage band — 0.25–30 Vrms
- Frequency — Within 100 kHz–500 MHz
- Connector — Dual banana fit
Common mistakes
- Using into wrong input impedance.
- Exceeding 30 Vrms.
- Ignoring frequency-response curve vs 25 MHz.
When to RFQ / what to tell us
- Quantity; ship-to.
Request a Quote · Get selection help
Specs
| Spec | Value |
|---|---|
| SKU | 32846 |
| Brand | Fluke |
| Model | 85RF II |
| Product type | RF Probe |
| Measuring range | 0.25–30 Vrms RF AC (1:1 AC-to-DC conversion into 10 MΩ DC voltmeter) |
| Accuracy | Ratio accuracy at 25 MHz into 10 MΩ: ±0.5 dB above 0.5 V; ±1.0 dB below 0.5 V |
| Output signal | DC voltage equal to rms sine input (dual banana into DMM) |
| Supply | Passive probe (powered by host DMM input) |
| Sensor type | High-frequency RF probe (100 kHz–500 MHz) |
| Electrical connection | Dual banana output for 10 MΩ ±10% DC voltmeter; ~9 pF input capacitance |
| Notes | Frequency response relative to 25 MHz: ±0.5 dB to 80 MHz; ±2.0 dB to 200 MHz; ±3.5 dB to 300 MHz; ±4.5 dB to 400 MHz; ±5.5 dB to 500 MHz. Max input 30 Vrms / 200 VDC. Specs from Fluke 85RF II Instruction Sheet. Index name PVA-1500HE2 corrected to 85RF II. |
Documents
FAQ
Q: Frequency span? A: About 100 kHz to 500 MHz.
Q: Host meter? A: 10 MΩ ±10% DC voltmeter / DMM.
Q: What should I send for a quote? A: Quantity and ship-to.
Links
| Parameter | Value |
|---|---|
| Measuring range | 0.25–30 Vrms RF AC (1:1 AC-to-DC conversion into 10 MΩ DC voltmeter) |
| Accuracy | Ratio accuracy at 25 MHz into 10 MΩ: ±0.5 dB above 0.5 V; ±1.0 dB below 0.5 V |
| Output | DC voltage equal to rms sine input (dual banana into DMM) |
| Supply | Passive probe (powered by host DMM input) |
| Electrical connection | Dual banana output for 10 MΩ ±10% DC voltmeter; ~9 pF input capacitance |
| Sensor type | High-frequency RF probe (100 kHz–500 MHz) |
| Notes | Frequency response relative to 25 MHz: ±0.5 dB to 80 MHz; ±2.0 dB to 200 MHz; ±3.5 dB to 300 MHz; ±4.5 dB to 400 MHz; ±5.5 dB to 500 MHz. Max input 30 Vrms / 200 VDC. Specs from Fluke 85RF II Instruction Sheet. Index name PVA-1500HE2 corrected to 85RF II. |