Model 3030 & 3030E Series Technical Manual Section 1
Ludlum Measurements, Inc. Page 1 November 2017
Introduction
he Model 3030 and 3030E are dual-channel counters designed for
simultaneous alpha and beta sample measurement. The Model 3030
has a built-in scintillation detector with a shielded chamber and
chrome-plated brass sample tray that can accept a maximum sample
size of 5.1 cm (2 in.) in diameter. The Model 3030E utilizes an external, side
mounted sample counter. Common external counters are: the alpha-only,
Model 43-10, or the alpha-beta, Model 43-10-1. Throughout this manual, the
term “3030” will be used to refer to both instruments unless otherwise
noted.
The Model 3030 is powered by main supply of 95-250 Vac. The instrument
features a built-in detector, high-voltage power supply, adjustable count time
periods, and a click-per-event audio with adjustable volume. A pulse height
analyzer is employed to provide information to the two independent
counters. The Model 3030 also features an internal trickle-charged gel-cell
battery for providing up to eight hours of use without mains supply. The
two independent LCDs (liquid crystal displays) feature six 1.3 cm (0.5 in.) tall
digits, which are backlit for improved visibility.
The instrument may be operated as a traditional scaler (counts per count
time) with a manually adjustable high voltage, or may be enabled to operate
with advanced features. The 9-pin RS-232 connector on the back of the
instrument allows attachment to a computer or printer. Software is provided
to allow the setup of several advanced features.
The counts per minute (CPM) or disintegrations per minute (DPM) modes
may be enabled to allow the count to be converted (automatically, in real
time) to cpm or dpm. The background radiation count may be subtracted
automatically in either mode. Crosstalk correction, alpha or beta alarms, and
time/date may also be set. Parameters are stored in non-volatile memory.
Time and date are maintained with an internal lithium battery.
Another advanced feature, which may be enabled or disabled, is the QC
(Quality Control) check function. When enabled, the user must perform
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