9) To ensure that each chamber is set correctly, repeat again
steps three through seven for each switch box chamber set-
ting. For each switch box setting the ETD should indicate the
total number of chambers connected to the display unit.
10) Turn the Atomlab OFF.
11) Set the switch box to chamber one and turn the system
back ON. After approximately 20 seconds the display unit
will emit a “beep,” the ENTER key will begin to flash and the
prompt “CH-1” will again appear in the ETD.
12) Press the flashing ENTER key and allow the Self-Test to
proceed. When the Self-Test is complete chamber one will
be fully initialized.
13) Set the switch box to chamber two. Turn the Atomlab
OFF. Wait five seconds and turn it back ON.
14) At the “beep” use the ETD ⇑ and ⇓ arrow keys to incre-
ment the ETD value so that it matches the switch box setting.
15) Press the flashing ENTER key and allow the Self-Test to
proceed. When the Self-Test is complete the chamber will be
fully initialized.
16) Turn the Atomlab OFF. Set the switch box dial to the next
chamber and turn the system back ON. Repeat steps 14 to
16 for each additional chamber.
Ensure the Chamber Well Liner and Sample Holder have
been placed into the Chamber Well. Press BKGND.
Both the Chamber Well Liner and Sample Holder
should be periodically checked for contamination as
described later in this chapter (the more your dose calibra-
tor is in use, the greater the frequency of checks required).
Remove your Cs-137 check source from its shield and
place it into the Sample Holder. Lower the holder, with
source, into the Chamber Well.
Press the Cs-137 key. The Activity Display will now show
the activity of your Cs-137 check source.
ATOMLAB Dose Calibrator Operation Manual Chapter 5
Biodex Medical Systems 5-3 Release 2.0
Background
Correction
Constancy Check
Cs-137
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