MFJ Enterprises MFJ-853H Quick Start Manual

INTRODUCTION

Congratulations on purchasing the MFJ-853H RF-Current Meter. The MFJ-
853H 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 in three ranges: 3A, 10A, and 30A.
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 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.
Press
Unlatch
Lift
Click!
1 2
3
Meter: The meter is scaled from 0 to 100. On the 10A range, move the
decimal point 1 place to the left (100 = 10 A). To convert meter readings made
1