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INTRODUCTION
Congratulations on purchasing the MFJ-853 RF-Current Meter. The MFJ-853
is designed for measuring RF current distribution on antenna elements and
radials, ground wires, and coax shields. Here are some important features we
think you'll like:
Range:
Measures RF current from as little as 300 mA to 3 Amps in three
ranges.
Low Interaction:
Sense coil has minimal effect on circuits under test.
Large Cable Capacity:
Accepts cables up to approximately 1/2" in diameter.
Power:
No power source needed.
Non-metallic case:
Minimizes field disturbance for accurate reading.
Handheld Size:
Light weight, only 2.25" x 1" x 3.75"
CONTROLS
1. Sense Coil:
Clamps onto conductor under test, accepts diameters to around
1/2" .
2. Meter:
Calibrated scale indicates readings in mA or Amps.
3. Range:
Selects from three measurement ranges.
OPERATING INSTRUCTIONS
Using the Sense Coil:
The sense coil snaps over wires and cables, as shown
below. To unlatch, squeeze the nylon carrier between thumb and forefinger--
applying opposing pressure. The coil's top section should move forward
slightly. With pressure applied, lift up to open. Position the wire or cable inside
the core opening. Close the lid over the cable, pressing down until latch clicks
shut.
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Click!
Lift
Press
Unlatch