Rapiscan TSA TPM-903B Operation And Service Manual - page 19
TSA TPM903 Operations and Service Manual
Doc: # 5058 Rev. A
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Unauthorized use or distribution is strictly prohibited
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NOTE: PC Communications will not work (connect) when profiling is turned on.
3.4.2.7 CALIBRATION:
Required items: A Cs
137
source with a depreciated value from 1uCi to 10uCi
The first thing the TPM controller does is to ask for the depreciated Cs
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activity of the source
that will be used for the calibration. If the user does not know the depreciated value of the
calibration source but does know when the source was manufactured, then the user can go to the
Rapiscan Systems web site (tsasystems.com) and look under archives/software/
SourceDepr
to
determine the depreciated value. When entering a value less than 10 remember to enter a zero as
the first digit.
After the depreciated value has been entered the next screen is an information only screen that
will list the target counts that the controller will be using to perform the calibration.
The next thing the TPM controller does is take "roll call" to identify/verify the addresses of the
DM-757's. If the addresses haven't changed since the last time the unit was calibrated, it will
continue with the calibration. If it senses a conflict, the TPM controller will instruct the pillars
(DM-757's) to pick random addresses and will attempt to resolve the pillars. If communications
fail after 3 attempts, the controller will tell the user which pillar failed and halt operation. If
pillars are resolved successfully, calibration will continue.
After testing/resolving the pillars, the unit will flash both LED's and emit a short
the user will be prompted:
PLACE SOURCE
ON PILLAR 1
PRESS ANY KEY
After user presses a key
CALIBRATING
PILLAR 1
COUNTS: X
HVDAC: X
COUNTS are one second count data from the pillar.
HVDAC is the DAC value being sent to the pillar to adjust the high voltage.