Part
J - Svstem Enerav Calioraticon an
Resolution
Theck
2owhole cOdv courting srpectica ara t. ce 256 inannmels in lengtn and have
amo emecsy talscrat:cn cf 1% kev rer channel,
Energy calicration along with
System erficsiencies
snculd
‘te checked at
Least
3
times
der =:
hour tay,
Teso.ction shcula Ce shecked each time a component is chansed or ..oved,
Cperator sncuid
tvre
the
followirg command secuence
Unerator
into
the
Systen
The
comruter:
CPU Response
1)
X FORGC1,1) CR
*
=)
X CUR 1,66) CR
©
3)
X FCOURC2, 133)
*
$4)
Cperator decressesS Main Origin tutton.
MGXG;
3)
1 cR
6)
7)
Operator denresses MAP and then MAIN push buttons,
990
137
Place check
Co and
Cs point sources beneath crystal.
8)
Deoress ADC start button or type X FAOCE1, 1900) CR.
9)
Commuter system now disclavs point sourte spectrum. The reak channel oF
.
137
Cs should a-pear as the Ist point to the right of the left ecursor( cursor #1)‘
while the high energy peak of
Co (1,33 mev) should apcrear as the Ist
shannel to the right of the right curser (cursor #2), if cursors do not
indica.e prorer Location of reax channels, then anplifier fine gain and
4DC zero may have tu be adjusted. Note: See secticn 5 to learn Row to
adjust the horizortal arc vertical lirits of
29)
Operator shculd adjust amolifier gain until the ¢62 kav
arated from the 1334 kev
11)
the display screen.
30
137
Cs peak is sep-
Co peak b’ 67 channels.
when amrlifier gain is correct, A&C zero should be adjusted until the $62
xev photoceak is found in charnel 66 and the 1334 kev pnotopeak is found
in channel 133,
Vote:
Cperator must zero the displaved srectrcum after
eaco adjustment ¢t. Zain or zers,
12)
When prover erergy caliocration has been achieved, check systen resolution,
13)
Stoc ALS acquisition by sushi-g ADC ster Cutten.
14)
Zero srettrum,
137
Place
Cs point source along the central axis or the detector asprcexinately
0.5 to l cetar From the setector.
13)
16)
Start ACC. ov deoressirg ADC Start cutton or typing X FAN 1,100)
~
ad
.
(