19
Troubleshooting
The Radalert 100 is a highly reliable instrument. If it does not
seem to be working properly, look through the following chart to
see if you can identify the problem.
Problem
Possible Cause
What to Check
Display is blank
battery: dead,
missing, or poor
connection
install and firmly
connect a new 9-
volt battery
broken LCD
if count light and
audio work, the
LCD may need to
be replaced
Display works, but
no counts are
registered
damaged Geiger
tube
if mica surface of
the tube has
wrinkles or visible
breaks, it needs to
be replaced
Reading is high,
but another
instrument has a
normal reading in
the same location
contamination
scan Radalert 100
with another
instrument; clean
instrument with a
damp cloth and
mild detergent
moisture
the circuit board
may be wet; dry
the instrument in a
warm dry place; if
it still has a
problem, it
requires factory
service