Dilon Navigator 2.0, User & Service Manual, Page: 13 / 43

Navigator 2.0 User Manual & Service Guide
N2-5000-07-001 Rev 7 -
13-
Revised 10/16/2018
www.Dilon.com
Table 4A-1. Controls and Displays on the Front of the Control Unit
Control Display Description
Power button:
Turns power on and off.
Volume knob:
Increases/decreases the volume of the
audible signal.
Display Screen:
When turned on, displays the photon
count per second. Upon completion of a 10-second
count, the total number of photons detected will show
on the display screen for 4 seconds, and then the
display returns to showing counts per second.
Isotope Indicator:
Indicates the isotope selected.
Isotopes detected on the Navigator 2.0 are I125,
511keV (for I-131 or FDG-18), In111, and Tc99.
Range Settings:
Adjusts the audible pitch, based on
density of events detected:
1x – Low event rates; all events are heard.
10x – Medium event rates; 1 in 10 events are heard.
100x – High event rates; 1 in 100 events are heard.
Pressing the Range button cycles through the ranges;
Select the one most useful to the procedure being
performed.
NOTE
:
Range selection only controls pitch of the
sound generated by the unit; it has no effect on
count rates displayed or signal conditioning.
Threshold
:
For CABLED PROBES only
, it controls the
count range of photon energy detected by the probe.
When the Threshold is off, the indicator is not
illuminated, and all photon energy, including scattered
photons, is detected.
When the Threshold is on, the indicator is illuminated. In
this setting, the detection of scattered photons is
reduced or eliminated. Signals of amplitude outside the
pre-configured energy range are discarded. Only those
events within the particular energy range are counted
and displayed.
NOTE:
The Threshold is normally on when using
probes. The Threshold may be set to off to count all
events detected by a cabled probe. (The Wireless Pilot
Probe features integrated threshold)