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F70 Specifications
- Mechanical: 3-piece breakdown aluminum pole system, batteries
under elbow, Armrest adjustment - forward/backward.
- Search coil: 9 3/4” open-frame waterproof concentric elliptical
search coil.
- Batteries: 4 AA, alkaline (not included).
- Weight: 2 pounds 15 ounces (1.3kg), with alkaline batteries
installed.
- Operating Principle: VLF induction balance
- Operating Frequency: nominal 13 kHz, quartz crystal timing
reference
- Basic Sensitivity: 6 x 109 root Hertz (detectivity)
- Lag Coefficient: 78 milliseconds
- Overload: standard 10” elliptical concentric
Reactive approximately 10,000 micro-cgs
Resistive approximately 1,200 micro-cgs
accessory 11” bi-axial
Reactive approximately 30,000 micro-cgs
Resistive approximately 3,700 micro-cgs
- Resistive Overload: approximately 1,200 micro-cgs units
(volume susceptibility)
4,800 micro-cgs units with sensitivity < 30.
- Ground Balancing Range: From ferrite to salt, inclusive
- Discrimination
Ground Suppression: combination of second and third order methods
ID Ground
Suppression: third order
- Battery Life: Typically 40 hours with high quality alkaline
batteries
Estimated 80 hours with nickel oxyhydroxide batteries
Estimated 65 hours with lithium iron disulfide batteries
- Operating Temp Range: 4 to +122 degrees F (-20 to +50 degrees
C)
- Operating Humidity Range: 0-90% non-condensing