Troxler 3241 Series - Taking Background Counts

Model 3241 Series
3-7
Backgr ound: xxxx
Ti me:
xx
mi nut es
Want
t o
t ake
a
new
Backgr ound?
T
T
a
a
k
k
i
i
n
n
g
g
B
B
a
a
c
c
k
k
g
g
r
r
o
o
u
u
n
n
d
d
C
C
o
o
u
u
n
n
t
t
s
s
Prior to performing any testing, measuring, or calibrating with
the gauge, take a background count. The background count
adjusts for changes in the gauge environment and location.
The Model 3241 gauge is influenced by external sources of
hydrogen. Once a background count is made, do not change the
surrounding sources of large hydrogen content (e.g., draining a
water bath, moving large containers of liquids). Take a new
background count if changes occur or are suspected. During and
after a background count the test samples should not be within 1
meter (3 feet) of the sample chamber.
The neutron source used in the gauge is Americium-
241:Beryllium and has a half-life of 432 years (or will undergo a
natural decay of 0.2% per year). The background count also
adjusts for source decay.
Press 〈BKG〉 for the display:
To take a new background count, press 〈YES〉.
Prepare the sample chamber as instructed and press 〈START〉.
After the count is complete and acceptable, press 〈YES〉. To take
another background count, press
〈NO〉.