General Microwave RAHAM 30

The General Microwave RAHAM 30 is a radiation hazard meter designed to measure microwave power density levels and ensure safety compliance in environments with potential microwave exposure. This thermocouple-based instrument delivers field and laboratory measurements across four selectable ranges, from 0.02 mW/cm² to 20 mW/cm², with frequency-dependent response accuracy of ±1.0 dB maximum from any direction except the handle. The meter operates on battery power and features a fail-safe design: DC bias on the thermocouple sensor triggers full-scale indication if the sensing element fails, eliminating false zero readings in high-power fields.

## Technical Specifications

• **Measurement Range:** Four full-scale power density ranges: 0.02 mW/cm², 0.2 mW/cm², 2 mW/cm², and 20 mW/cm²
• **Frequency Response:** ±1.0 dB maximum deviation for energy incident from any direction, except from or through the handle
• **Field Strength Conversion:** E (V/m) = 61.4√P, where P is measured power density in mW/cm²
• **Sensor Technology:** Thermocouple-based detection with DC bias fail-safe circuit
• **Construction:** Passive component design with no semiconductors; sensitive meter movement for high reliability

## Key Features

• Interchangeable probes factory calibrated for consistency
• Extension cable support for remote measurement capability
• Probe coupling via standard coupling nut interface
• Operating instructions printed on meter rear panel
• Compliance with OSHA Standard 1910.97 and ANSI C95.1-1982

## Standards & Safety Limits

The RAHAM 30 meets IMPI Performance Standard on Leakage from Industrial Microwave Systems (August 1973) and supports OSHA and Department of Defense requirements. ANSI C95.1-1982 exposure limits by frequency:

• 0.3–3 MHz: 100 mW/cm²
• 3–30 MHz: 10 mW/cm²
• 30–300 MHz: 1.0 × f/300 mW/cm²
• 300–1500 MHz: 5.0 mW/cm²

## Typical Applications

• Industrial microwave oven leakage assessment
• Field safety surveys and compliance verification
• Laboratory hazard monitoring
• Occupational exposure documentation