Model 3001 Multi-Detector Survey Meter
User’s Manual
Section 1
Ludlum Measurements, Inc.
Page 1-1
April 2017
Introduction
The Model 3001 is an ergonomic, lightweight instrument which can be
used for radiation survey purposes. It features the ability to measure
radiation in count rate, exposure rate/dose, activity rate, integrated
exposure/dose, time-averaged rates, and scaler counts. The Model 3001
supports up to four external radiation detectors to detect alpha, beta, or
gamma radiation. Each detector may have its own set of calibration and
user parameters. The DETECTOR button is used to select the active
detector.
The instrument features a large backlit LCD (liquid crystal display), a
piercing audio warning, and easy, intuitive use. The unit body is made of
lightweight but durable plastic. It is intended for outdoor use and can
resist splashing water. The foam grip provides a comfortable,
ergonomic grip but may be removed for ease of decontamination.
Three modes of operation are available for the Model 3001 – RATE,
MAX, and COUNT. RATE mode operation will display the current
count, exposure, or activity rate. MAX mode is used to capture the
highest count, activity, or exposure rate detected – useful for finding a
peak rate, or frisking when the display is not visible. Two sets of units
(primary and secondary) for RATE and MAX modes can be chosen
from among cps, cpm, Bq, dpm, R/h, or
Sv/h
. The user can switch
between these two units by simply pressing the UNITS button.
COUNT mode allows the user to perform a count for a predetermined
time. Depending on the count units chosen, the result can be a scaler
count (in counts or disintegrations), a time-averaged rate (cpm, dpm,
Bq, cps), a time-averaged exposure or dose (R/h, Sv/h), or an
integrated exposure or dose (R or Sv)
.
The display will be automatically backlit if light levels are low. The
display backlight can also be configured for “Continuous On”
operation. RATE, MAX, and COUNT modes can be silent or utilize a
“click” audio; the “click” audio is always silent during COUNT mode
by default. A "sigma" audio mode can be enabled (disabling the "click"
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