ETS-Lindgren HI-3603 VLF Survey Meter - Manual (Page 50)

HI-3603 VDT/VLF Survey Meter
© ETS-Lindgren, August, 2005
Revision E, Part # H-600042
50
battery condition of the HI-3603. The HI-3616 battery life is
significantly longer than that of the HI-3603; when the display of
the HI-3616 no longer responds; replace both batteries.
The data link between the HI-3603 and the HI-3616 is a plastic
fiber cable. While the fiber optic cable is generally very durable,
avoid sharp bends in the cable and avoid placing the cable under
tension (do not pull on it). Because the data is transferred by
light pulses, the ends of the cable must be kept clean and
undamaged. Use the plastic caps provided to protect the cable
ends when not in use.
With the HI-3616 connected and operating, the VDT meter may
be located as required for a reading and the value measured
observed on the display of the HI-3616. When characterizing
operator exposure as detailed in section 5.0, the HI-3603 may be
positioned at various locations against the operator's body
without interference from the instrument user (surveyor).
When not in use, the HI-3616 should be turned OFF. Refer to the
maintenance instructions in section 8.0 regarding removal of
batteries when the instrument will not be used for long periods of
time.
USING THE RECORDER OUTPUT
The HI-3616 includes a 3.5 mm stereo jack, located on the
bottom of the unit, used for the recorder output signal. This
signal is a DC voltage proportional to the indicated field value. It
is a 0-4 VDC signal with the four volt level representing a "full
scale" indication. The field value represented by the output
signal depends on the setting of the range switch. The output
drives a load of 5,000 ohms or more.