ETS-Lindgren HI-3604 ELF Survey Meter - Manual (Page 19)

HI-3604 Manual Page -- 11
3.0 OPERATION
NOTE: The HI-3604 is enclosed in a rugged aluminum extruded
case for protection of its internal circuitry. Because of the
nature of its intended use, the field sensor extends from the
readout module. The structure of the sensor is a multilayered
printed circuit board. It is well secured internally to the
aluminum case and has a tough polyester covering but is
exposed to greater potential for physical damage because of its
size and location. Use care in handling the HI-3604 to avoid
damaging the sensor by striking it against objects or applying
excessive force to the sensor paddle. When not in use, keep the
HI-3604 in its protective case where the sensor paddle is
properly supported.
Start Up
Membrane switches are used for controlling the HI-3604's
operation. The switch keypads are activated by gently pressing
on the center of the pad with a finger tip. Do not use hard or
pointed objects to operate the switch keypads.
Turn the unit ON, the default measurement condition is
Magnetic Fields. The custom LCD readout displays the units of
measure in addition to the observed value. A Bargraph display
is provided along the top of the LCD window. This display is an
analog approximation of the currently displayed digital value as
a percentage of the full scale range. The Bargraph input is
unfiltered for fast response when searching for peak fields.
The digital display response is digitally filtered for increased ease
of operation. This smooths the response to rapidly changing
fields. In some measurement situations, however, it may be
helpful to increase the response of the digital display, ie. reduce
the response time. This is done when the instrument is turned
on. Refer to KEYPAD MATRIX in this section, and the operation
of the E/H keypad for details.