BERTHOLD TECHNOLOGIES LB 124 Scint Series User manual

LB 124 Scint
Digital
Contamination
Monitor
ID No.: 43727BA2
Rev. No.: 06 09.04.08

LB 124 Scint Contents
I
Contents
HOW TO WORK WITH THIS MANUAL.....................................................................III
SAFETY INSTRUCTIONS......................................................................................... IV
1. THE PRINCIPLE OF OPERATION OF THE LB 124 SCINT.........................1
1.1 Overview .........................................................................................................1
1.2 The Principle of Operation of Scintillation Counters .......................................2
1.3 What’s Being Measured?................................................................................3
1.4 Measurement Modes ......................................................................................5
2. SYSTEM DESCRIPTION................................................................................7
2.1 Housing with Electronic System......................................................................7
2.2 Operating and Display Elements ....................................................................9
2.2.1 Design of the Display ......................................................................................9
2.2.2 Function Keys ...............................................................................................10
2.2.3 Alerts .............................................................................................................10
2.3 Scintillation Counter ......................................................................................11
2.4 Power Supply ................................................................................................12
2.4.1 Batteries ........................................................................................................12
2.4.2 Rechargeable Batteries and Power Supply Unit...........................................13
2.4.3 Power Supply of the Photomultiplier (PM) ....................................................13
2.4.4 Power Supply and Program Memory ............................................................13
2.5 Data Interface................................................................................................14
2.6 Equipment Delivered.....................................................................................14
3. GETTING STARTED....................................................................................15
3.1 Connecting the Device..................................................................................15
3.2 The First Control Measurement ....................................................................16
3.3 Setting Basic Parameters .............................................................................16
3.4 Possible Errors During Start-Up....................................................................18
4. SOFTWARE DESIGN AND OPERATION ...................................................19
4.1 Software Structure ........................................................................................19
4.2 Measurement Menu Display .........................................................................20
4.3 Key Functions ...............................................................................................22
4.3.1 Push Buttons.................................................................................................22
4.3.2 Softkeys.........................................................................................................23
4.4 Operation ......................................................................................................24
4.4.1 Selecting Menus and Options .......................................................................24
4.4.2 Editing: Entering Numbers and Letters.........................................................24
4.4.3 Selecting Items from a List............................................................................25
4.4.4 How to Switch to the System Menu? ............................................................26
4.4.5 LED Indicators...............................................................................................26
5. CONTAMINATION MEASUREMENTS........................................................27
5.1 Contamination Measurement Requirements ................................................28
5.1.1 Performance Check ......................................................................................28
5.1.2 Measuring and Storing the Background .......................................................29
5.1.3 Creating the Small Nuclide Table .................................................................32
5.2 Explanations of the Different Measurement Modes......................................36
5.3 Accuracy of the Display in Bq/cm² ................................................................37
5.4 Exceeding of Threshold Values ....................................................................38

Contents LB 124 Scint
II
6. SOFTWARE FUNCTIONS ...........................................................................39
6.1 Measurement ................................................................................................41
6.2 Background ...................................................................................................44
6.3 Measurement Mode ......................................................................................48
6.4 Measurement Parameters ............................................................................49
6.4.1 Ratemeter .....................................................................................................49
6.4.2 Scaler-Timer..................................................................................................50
6.4.3 Survey ...........................................................................................................52
6.4.4 Clearance......................................................................................................53
6.4.5 Half-life ..........................................................................................................54
6.5 Cycles............................................................................................................56
6.6 Nuclides ........................................................................................................58
6.7 Memory .........................................................................................................62
6.8 Parameters....................................................................................................64
6.8.1 Language ......................................................................................................64
6.8.2 Date/Time......................................................................................................64
6.8.3 Radiationmode ..............................................................................................65
6.8.4 Calibration .....................................................................................................65
6.8.5 Grid Transmission .........................................................................................65
6.8.6 Alarm .............................................................................................................65
6.8.7 Ticks ..............................................................................................................67
6.8.8 Light...............................................................................................................67
6.8.9 RS232 ...........................................................................................................68
6.8.10 Power Supply ................................................................................................68
6.8.11 Hardware.......................................................................................................69
6.9 Profile ............................................................................................................70
6.9.1 Overview .......................................................................................................70
6.9.2 Editing Profiles ..............................................................................................71
6.9.3 Preset Profiles...............................................................................................73
6.9.4 Factory Settings ............................................................................................73
6.9.5 Transmit/Receive Setup................................................................................74
7. MAINTENANCE............................................................................................75
7.1 Cleaning the Detector Window .....................................................................75
7.2 Changing the Window Foil with Scintillator...................................................76
7.3 Exchanging the Battery .................................................................................77
7.4 Charging the Rechargeable Batteries...........................................................78
8. BASIS OF CALCULATION..........................................................................79
8.1 Count Rate Calculation .................................................................................79
8.2 Ratemeter Function.......................................................................................80
8.3 Survey Mode .................................................................................................81
8.4 Half-life Measurement...................................................................................82
8.5 Scaler-Timer Function...................................................................................82
8.6 Bq-Calculation and Determination of the Calibration Factors.......................83
9. TECHNICAL DATA ......................................................................................89
10. INDEX ...........................................................................................................91

LB 124 Scint How to Work with this Manual
III
How to Work with this Manual
A brief overview of the structure of the present operating manual
will help you to find the pertinent information quickly and easily:
Chapter 1 provides basic information on the principle of operation of the digi-
tal contamination monitor: How does a scintillation counter work?
What is the significance of the units cps and Bq/cm²?
Chapter 2 contains the description of the monitor:
The construction of the device, including operating and display
elements, the functions of the keys, as well as the assembling and
handling of the detector.
Chapter 3 describes how to take the LB 124 Scint into operation.
Chapter 4 describes the software structure and operation.
Chapter 5 provides information on the contamination measurement: meas-
urement conditions, measuring process and explanations of the in-
dividual measuring methods.
Chapter 6 documents all software functions of the LB 124 Scint on the Sys-
tem Menu. This is the reference part of the operating manual.
Chapter 7 contains the description of the maintenance work required.
Chapter 8 deals with the calculation methods used by the LB 124 Scint, and
the statistical measuring accuracy.
Moreover, the chapter describes how to convert the unit of meas-
urement from counts per second into surface activities, so that you
are able to determine your own calibration factors with the help of
the given formula and by means of a calibrating source, and to en-
ter this data in the LB 124 Scint.
Chapter 9 contains the technical specifications.

Safety Instructions LB 124 Scint
IV
Safety instructions
Use and function The digital contamination monitor LB 124 Scint can be widely
and flexibly used for contamination measurements in radiation
protection.
It is used wherever contamination caused by radioactive sub-
stances is encountered and has to be monitored:
in medical nuclide laboratories, in nuclear research, in nuclear
power plants, as well as the environment in general.
Safety instructions If official regulations exist concerning the installation and/or op-
eration of radiation measurement devices, the operator must
ensure that these regulations are complied with.
The manufacturer has undertaken everything to ensure the safe
operation of the instrument. The user has to make sure to use
and handle the LB 124 Scint in such a manner that the safe op-
eration is not endangered.
In particular, this applies to:
The sensitive window foil of the counter tubes:
•Whenever you are measuring uneven or pointed objects, be
careful not to damage the foil.
To be able to handle the monitor LB 124 Scint properly and ac-
cording to its intended use, one has to have a thorough knowl-
edge of the operating manual. Although the handling is very
easy, you should nevertheless read the manual.
In order to make sure that the device works properly, please fol-
low the manufacturer’s instructions concerning the functional
checks and maintenance work.
All maintenance and repair work exceeding the steps described
in the operating manual must only be carried out by BERTHOLD
TECHNOLOGIES or else by technicians authorized by BERTHOLD
TECHNOLOGIES.

LB 124 Scint 1. The Principle of Operation of the LB 124 Scint
1
1. The Principle of Operation of the LB 124 Scint
1.1 Overview
The portable contamination monitor LB 124 Scint is used for de-
tecting and measuring radioactive alpha, beta and gamma con-
tamination on various surfaces such as floors, walls, desks, ob-
jects, clothes or the skin. It consists of a display unit with micro-
processor electronics, the photomultiplier, and a ZnS scintilla-
tion counter with an effective window size of 118 mm x 145 mm,
which can easily be replaced, and which is inserted in the bot-
tom of the instrument.
The LB 124 Scint is able to distinguish alpha nuclides from be-
ta/gamma nuclides and measure them simultaneously.
The data can alternatively be displayed as count rate (cps =
counts per second) or as area activity (Bq/cm²).
The device is protected as much as possible against environ-
mental conditions such as humidity, dust or extreme tempera-
tures, and is therefore also suited for outdoor use and rough
operating conditions. The entrance window of the detector is
protected against damage by a metal grid.
Since not only professionals will work with the Contamination
Monitor, we would like to give you some quick information on
the working method of scintillators and on how to perform ra-
dioactivity measurements.

1. The Principle of Operation of the LB 124 Scint LB 124 Scint
2
1.2 The Principle of Operation of Scintillation Counters
With conventional scintillation counters the radiation to be
measured hits one or several scintillator layers. The flashes of
light which are created in this process are propagated – either
directly, or bundled by a suitable reflector – to a photomultiplier
and measured.
Former state of the art
To be able to measure alpha as well as beta and gamma radia-
tion, so-called sandwich detectors have been used which com-
prise two layers: ZnS for the alpha radiation and plastic scintilla-
tors for the beta and gamma radiation, with the ZnS layer facing
the sample.
The drawbacks of this method are the low sensitivity to the low-
energetic beta radiation, which has to pass through the ZnS
layer, and inadequate discrimination of the radiation types
(strong spillover effects in the beta channel) as well high pro-
duction costs.
New measuring method by BERTHOLD TECHNOLOGIES
The Contamination Monitor LB 124 Scint is using a single scin-
tillator made of zinc sulphide (ZnS) to measure radioactivity.
The radiation to be measured hits the scintillator. The flashes of
light created in this process are passed to a photomultiplier via
a suitable reflector with suitable preamplifier and discriminator
stage and measured. The individual types of radiation, i.e. al-
pha and beta, gamma, X-ray radiation, can be distinguished
by means of special evaluation and correlation circuits, and
thus separated and measured at the same time. The spillover of
alpha particles into the beta channel is corrected by the soft-
ware, so that only the beta-gamma parts of the alpha sources,
i.e. Am-241, will be indicated in the beta channel.
The benefits of this method are:
¾high measurement accuracy
¾exact distinction of the types of radiation and the individual
nuclides (very low spillover)
¾high sensitivity even at low energies
¾the negligible spillover of Alphas into the Beta channel
¾low costs for the scintillator and
¾ease of maintenance.

LB 124 Scint 1. The Principle of Operation of the LB 124 Scint
3
1.3 What’s Being Measured?
a) Counts per second (cps)
The Contamination Monitor is used to measure the radiation ac-
tivity on the surface of persons or objects in counts per second.
With this measuring method, all alpha, beta and gamma counts
are then counted and displayed every second (cps). Since the
count rate registered each second is subject to statistical varia-
tions, the average is calculated on a continuous basis, so that
the displayed result is adapted to the count rate and the dis-
played results is less and less subject to statistical variations af-
ter a very short measuring time.
b) Area activity (Bq/cm2)
When you choose to measure the contamination in Bq/cm2(i.e.
the radiation area activity), the count rate has to be converted
into surface activity. There is a different conversion factor for
each nuclide. The individual factors are stored in the LB 124
Scint. It is therefore necessary to select the nuclide or nuclide
compound to be measured at the device before each meas-
urement. An alpha nuclide can be set for the alpha channel and
a nuclide with beta or gamma radiation can be set for the beta-
gamma channel. The types of radiation are distinguished during
measurement. The measurement takes place simultaneously.
This does not mean, however, that the contamination monitor is
able to measure this particular nuclide selectively; but the moni-
tor just values the contamination (i.e. the count rate measured)
as if it was caused by the respective radio nuclide.
The conversion is based upon calibration factors determined for
each nuclide and for your monitor. They do not only depend on
the
- radiation type,
- radiation energy and
- decay scheme of the respective nuclide;
but other factors are of importance as well, such as the:
- detector sensitivity,
- measuring geometry,
- self-absorption in the calibrating source.
The calibration factor thus indicates the value with which the
counts per seconds have to be multiplied to obtain a result dis-
play in Bq/cm2.
Accordingly, a measurement in Bq/cm2is only correct if the se-
lected nuclide and the measured nuclide are one and the same.

1. The Principle of Operation of the LB 124 Scint LB 124 Scint
4
When you select the unit Bq/cm2and the respective nuclide, the
LB 124 Scint automatically converts the cps measured into
Bq/cm2. To measure the area activity, the software comprises
an (editable) nuclide library containing at present approx. 60 dif-
ferent nuclides and the respective calibration factors. Moreover,
two free entry positions are available, where you can enter e.g.
calibration factors for other nuclides.
What can you do if you don‘t
know the nuclide? As things are not always that clear in practical operation, but
you are often dealing with nuclide compounds, unknown or only
partly known nuclides, the following solutions are at your dis-
posal:
Determine an
unknown nuclide An unknown nuclide can be determined by means of a half-life
measurement. Proceed as follows: On the Measurement
menu, select the item Half-life Value (see chapter 6.4.5).
Nuclide compound of
unknown composition When you are dealing with unknown compositions, you can se-
lect a calibration factor representing an average value of the
most frequently occurring beta radiation sources after nuclear
power station accidents.
When the nuclides are not known, please select the option β-
Tot (Beta total).
Nuclide compound of
known composition If you wish to measure the activities of several nuclides that are
known to you at the same time, you can do the averaging your-
self (and also the weighting, if required), and then enter the ca-
libration factor. The free entry positions that are at your disposal
for this purpose are dealt with in chapter 6.6.
Another possibility is to preset a so-called radioactive tracer.
This means that you select one of the isotopes stored in the nu-
clide library of your device; this isotope should be one of aver-
age energy and should correspond with the nuclide compound
to be measured.

LB 124 Scint 1. The Principle of Operation of the LB 124 Scint
5
1.4 Measurement Modes
The LB 124 Scint offers the following measurement modes:
a) Survey mode for fast detection of contaminations. In this
mode the instrument reacts very sensitive to different types
of radiation activities and shows changes very quickly.
b) The Ratemeter mode does not react quite as quickly to ac-
tivity differences, but a higher accuracy can be achieved.
c) The Scaler-Timer mode is designed for high measuring ac-
curacy. Here you can choose between two standards for the
length of a measurement: the measuring interval and the
statistical accuracy
d) For a clearance measurement, a limit value is defined and
if this value is exceeded, a signal will be triggered.
e) The half-life measurement is used to determine the nu-
clide.
Alarm thresholds One alarm threshold can be defined for each nuclide; if this
threshold is exceeded, an optical and acoustic signal will be ac-
tuated.
Storing measured values Up to 1000 individual measured values on average can be
stored and transferred to a PC or printer. The respective rele-
vant parameters are stored together with the measured values.
These parameters depend on the measurement mode.
Measuring accuracy With both measuring methods (count rate and decay rate), you
can use either the survey or ratemeter function (quick meas-
urement function), or the scaler-timer function. In the ratemeter
mode the measuring accuracy can be estimated based on the
display accuracy (few or no decimals). Up to 3 decimals are
displayed.

1. The Principle of Operation of the LB 124 Scint LB 124 Scint
6
Range of application of the ratemeter, scaler-timer and survey modes
Measurements in the operating modes "Survey" and "Rateme-
ter" are used to detect contaminations. In this mode, every
change in the radiation field is quickly indicated. In the Survey
mode a lower measurement accuracy is accepted in order to
detect changes even more quickly.
An accurate measurement requires - in contrast to the Survey
mode - averaging of the count rates over a longer period of
time. The LB 124 Scint does this automatically in the Rateme-
ter mode, provided that the mean count rate remains constant
within the statistical significance range during this period. This
can for example be assumed for a contamination measure-
ment, if the device is not moved during measurement.
To carry out stationary measurements with a given accuracy for
the average value, however, it is advisable to select the operat-
ing mode Scaler-Timer. In this measurement mode, you can
preset either the averaging interval or – by selecting the num-
ber of pulses per unit time – the statistical accuracy of the
measured value.
For great demands concerning the accuracy, you are also able
to determine the background (immediately before the actual
measurement) in the CPS (raw data) mode by means of the
scaler-timer, and to enter this background value immediately.

LB 124 Scint 2. System Description
7
2. System Description
2.1 Housing with Electronic System
The splash-proof housing accommodates the measuring and
control electronics, the software and the operating elements of
the monitor (see Figure 1).
RS232 Interface Connection for power supply unit
Figure 1: LB 124 Scint
Electronics The complete electronic system with photomultiplier (incl.
the software and the high voltage generator) is located inside
the housing.
Scintillator The scintillator is deposited on a transparent carrier. The foil is
stretched over a frame and protected by a metal grid. The de-
tector is fixed to the bottom side of the device with two fixing
screws that it can easily be unscrewed with the help of a coin.
The frame with foil and scintillator can easily be exchanged.
Make sure to change the frame in semi-darkness, as the
photomultiplier and scintillator are sensitive to light. Then
do not work with the device for 12 hours to allow the phos-
phorescence radiation to subside.
Protection plate The radiation entrance window can be protected by a metal
protection plate.

2. System Description LB 124 Scint
8
Connections The connections for the power supply unit and the
PC/printer (RS232 interface) are located on the right side of
the device.
Operating voltage The device can be operated either with the help of a power
supply unit, with rechargeable batteries (baby 1.2 V), or with
batteries (baby 1.5V) located on the bottom side of the device
(see ). When the power supply unit is connected, the operating
voltage is supplied via mains and the rechargeable batteries
can be charged. The charging process is started via the menu
Power Supply/Charge Mode. During the charging process, the
device works with mains voltage.
If the LB 124 Scint is connected to power or placed into the
charging station, the device is turned on automatically.
Fixing screws for counter tube Fixing screw for battery case
Figure 2: Contamination Monitor (view from below)

LB 124 Scint 2. System Description
9
2.2 Operating and Display Elements
Measurement, operation and display are controlled by the soft-
ware integrated in the LB 124 Scint. Measured values, menus
and user information are displayed on a monochrome LCD
graphics module (192 x 64 pixel) with LED backlighting and a
scratch resistant Plexiglas screen. The operation takes place
with the help of the six function keys below the screen. Alerts
and status signals are output via 2 LED’s and a buzzer.
2.2.1 Design of the Display
Measurement menu For more detailed information, please refer to chapter 4.2
Top line (black shading):
Shows status information and the profile name (user).
Center field:
Net measured value(s) with unit of measurement and measured
nuclide(s) or the net value (= cps measurement). In case of si-
multaneous α-/βγ-measurement, both measurement values will
be displayed. Below these values, you find information on the
measurement which can be selected via the softkey function In-
fo/Mod: e.g. the gross values or the representation in the form
of a scale from 0-100% in proportion to the alarm threshold of
the selected nuclide.
Figure 3: Display and function keys
Measuring mode
Measuring value (βγ-ch.)
100% scale
or Alpha display
Softkeys (menus)
Function keys

2. System Description LB 124 Scint
10
Bottom line (black shading):
Here the menus or functions are displayed that can be selected
via the keys under the display (so-called softkey functions.
Softkey functions). On the Measurement Menu, the four func-
tion keys in the center have the significance that is assigned to
them via the softkeys above.
System menu On the System Menu, the menus and functions that can be se-
lected are displayed, and parameters can be edited.
The selection and the parameter input takes place via the push
keys. The functions of the individual push keys can be seen
from their respective labels. See chapter 4.1.
Softkey buttons
2.2.2 Function Keys
The operation of the device and the software takes place via six
push keys with the respective function names. The 4 keys in the
middle have additional functions on the Measurement Menu;
these functions are assigned to them via the softkeys above
them (this is made clear by means of the vertical lines). The
softkeys are indicated in the bottom line of the display (black
shading). See chapter 4.2.
2.2.3 Alerts
LED displays The LED’s on the foil keyboard indicate the following states:
Left LED Alert: the threshold has been exceeded
Right LED When a button has been pressed, this LED is lit as long as the
processor is busy with the actuated function.
Acoustic signal When the threshold is exceeded, an alarm signal sounds (if set
on the Parameter menu). The red LED (on the left) is flashing.
On the Parameter menu you can choose visual, acoustic or
vibration as signal type.
Battery exchange When the battery/rechargeable battery voltage indicated after
power on of the device is below 3V for batteries and below 3.5V

LB 124 Scint 2. System Description
11
for rechargeable batteries, the running time left is max. 2-4
hours!
In this case, the batteries have to be replaced.
2.3 Scintillation Counter
The scintillator is deposited on a transparent carrier. The foil is
stretched over a frame and protected by a metal grid. The de-
tector is fixed to the bottom side of the device with two fixing
screws that can easily be unscrewed with the help of a coin.
The frame with foil and scintillator can easily be exchanged.
The reflector and the photomultiplier are located inside the
housing, directly behind the scintillator. Also inside the housing
there is the power supply, the electronics with evaluation and
correlation circuits as well as the evaluation electronics with the
software.
The high voltage is factory-set. The high voltage can only be
checked or modified with the help of a service adapter and by
experienced maintenance personnel.
The scintillator which has been deposited on the foil, can easily
be exchanged without having to use any special tool, e.g. if the
foil is damaged (see chapter 7.2).
When you replace the foil, please make sure that
the replacement takes place in a dry and dust free place
no humidity or dirt whatsoever can get into the gap!
you change the frame in semi-darkness, as the photomulti-
plier and scintillator are sensitive to light. Then do not work
with the device for 12 hours to allow the phosphorescence
radiation to subside.

2. System Description LB 124 Scint
12
2.4 Power Supply
2.4.1 Batteries
The fixing screw of the battery case cover can be unscrewed
using a coin, so that the cover can be taken off.
Figure 4: Open battery case
Using batteries The device can be run with 3 batteries (baby 1.5V).
To ensure the correct arrangement of the batteries, their re-
spective polarities are indicated at the bottom of the battery
compartment (see Figure 4).
Any time the device is started up, the user is informed about the
state of the batteries: The voltage can be queried on the menu
Parameter/Power Supply/Voltage Battery.
For this purpose, Battery has to be selected as software setting
on the Hardware menu.
Please note:
The RAM memory storing the measured data, the settings and
the date is permanently supplied with power via a lithium bat-
tery when the device is not being run with supply voltage or with
batteries/rechargeable batteries. In order to avoid a data loss,
the lithium battery should therefore be replaced while the device
is being supplied with power with supply voltage or via batter-
ies/rechargeable batteries. The lithium battery is located on the
motherboard and should therefore only be replaced by trained
staff.

LB 124 Scint 2. System Description
13
2.4.2 Rechargeable Batteries and Power Supply Unit
When an accumulator is used for the power supply, the option
Accu on the menu Parameter/Power Supply has to be se-
lected. With this option, the Charge Function is activated
when the charging mode is set to ON. Do not enable the charg-
ing function if batteries are in the device.
If the LB 124 Scint is connected to power or placed into the
charging station, the device is turned on automatically. The
charging process is started new depending on the settings
for cell type, charge mode and charge time. The charging
process takes place only when the device is turned on.
An activated System Timeout is not taken into account while
the charging function is active.
2.4.3 Power Supply of the Photomultiplier (PM)
Batteries and rechargeable batteries do not only supply the ba-
sic device with power. Using a fixed control voltage between 0.5
and 1.3 Volt, the high voltage of the photomultiplier is con-
trolled.
2.4.4 Power Supply and Program Memory
1. The software program, the calibration factors as well as all
fixed settings are stored in the FLASH and are independent
of the power supply.
2. The calibration factors, threshold settings, dates, measured
values, etc. defined by the user are stored in the RAM (lith-
ium battery-buffered). By means of the reset function (the
factory settings can be found under parameters/factory set-
tings), these values can be deleted; in this case, the factory-
set default values will be loaded. This function is only acces-
sible if the respective authorization to access has been as-
signed.

2. System Description LB 124 Scint
14
2.5 Data Interface
Data is output to a PC or printer via the RS 232 data interface
(see Figure 1).
Software for
data transfer to PC Data transfer between the LB 124 Scint and a PC is at present
only possible in one direction, i.e. when the respective output
function is activated (e.g. output of stored measured values or
through cyclical printout), the data is output via the interface. In
order to receive the data, a standard terminal program has to
be installed on the PC. The terminal program integrated in Win-
dows has been tested by the manufacturer.
For correct data transfer, it is necessary to adapt the transmis-
sion parameters in the terminal program to the parameters of
the output device. The LB 124 Scint issues 8 data bits, no parity
and one stop bit. The transfer rate (baud rate) can be modified
on the menu Parameter / RS232. The default setting of the de-
vice delivered is 19200 baud. When you start a printout of the
measured values, these have to be readable in plain text on the
screen. The file generated during this procedure can be further
processed with any standard ASCII editor, or else transferred to
a printer. The data (separated by Tab and CR/LF) can be proc-
essed further using a spreadsheet program such as EXCEL.
2.6 Equipment Delivered
Standard equipment The measuring and display unit LB 124 Scint with ZnS scintilla-
tion counter.
Standard accessories 1 set of spare batteries
Operating manual
Optional accessories 1 plate with a test source with 90Sr
1 aluminum transport box, 40 cm x 26 cm x 25 cm.
1 power supply unit
1 wall bracket