Ludlum Measurements 52-1, Manual

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Model 52-1 Family Technical Manual
Section 4
Ludlum Measurements, Inc. Page 4-5 July 2018
Attenuation:
This parameter is used in the stop-and-count mode to
compensate for the shielding effect of a human body inside the portal.
This parameter will vary depending on local background radiation.
Typical setpoints might be 0.5% to 2.0%. To determine this parameter,
find the percentage decrease in background with an average-sized person
inside the portal. Alternatively, measure the percentage decrease of
several different people, and then determine the average decrease.
Although the shielding effect is slight, this parameter is very useful for
highest sensitivity applications. If not being used, this parameter should
be set to 0.0%.
AUDIO ON (Y/N):
"
Yes" enables the audio, "No" disables the audio
RS-232 Port
The RS-232 port allows the instrument to be connected to a printer or a
computer so that a record can be kept of the activity of the instrument.
When connected to a printer - When the instrument is first turned on,
the printer will print the parameter settings. From then on, when an
alarm occurs, the printer will print out the time and date, the
background counts, and the number of sigma above background for all
channels. See the example below.
When connected to a computer - The instrument will send the same
data to a computer that it sends to a printer (see above).
The RS-232 port operates at 9600 baud, 8 data bits, 1 stop bit, no parity
(9600,8,N,1).
An example print-out from the Model 52-1 RS-232 port after power-on is
shown here:
LUDLUM MODEL 52-1 PORTAL
02-JAN-00 14:52
SETUP REPORT
SIGMA= 4.5
COUNT TIME=000
ALARM TIME= 015
INCOMPLETE= 010
RDA SOURCE = 500
LOW BKG= 20
HIGH BKG= 2000
ACTIVE DET: LT LB RT RB
IND. ALARM=Y
SUM ALARM= Y
# OF SAMPLES=2
BKG UPDATE=8