GF Instruments GAMMA Surveyor User manual

User Guide v 1.2

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GAMMA Surveyor

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GAMMA Surveyor
Introduction...................................................................................................5
Control Unit ..................................................................................................6
Power Supply ............................................................................................ 7
Battery Charging ................................................................................... 7
Connections...............................................................................................8
Probe Connection..................................................................................8
GPS Receiver Connection.....................................................................8
Connection to PC ..................................................................................8
Basic Operation of the Instrument ............................................................9
Menu Handling .....................................................................................9
Choice from List of Items .....................................................................9
Input of Numerical Values .................................................................. 10
Text Input............................................................................................10
Display Backlight................................................................................11
Display Contrast..................................................................................11
Full Spectra & Assay Mode ........................................................................ 12
Measurement...........................................................................................14
Setting .....................................................................................................20
Calibration...............................................................................................22
Dose Rate Mode..........................................................................................24
Measurement...........................................................................................25
Setting .....................................................................................................30
Calibration...............................................................................................31
Search Mode ...............................................................................................33
Measurement...........................................................................................34
Setting .....................................................................................................35
File manager................................................................................................36
Measured Data Displaying......................................................................36
Deletion of the File .................................................................................36
Erasing of the Whole Memory................................................................ 36
Measuring Probes........................................................................................37
Small Handheld probe............................................................................. 38
2" and 3" Combined Probes ....................................................................40
Borehole Accessories..............................................................................42
Gamma Surveyor Software.........................................................................44
Installation of the Software .....................................................................44
Measured Data Download....................................................................... 44
Connection of the Instrument to PC....................................................44
Start of the Software ...........................................................................45
File Rename ........................................................................................45

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GAMMA Surveyor
Data Download and Export of the Files ..............................................45
File Deleting........................................................................................46
Finishing of the Work .........................................................................46
Output File Format..................................................................................46
Dose Rate Measurement .....................................................................46
Spectrum & Assay .............................................................................. 46
Technical Specifications .............................................................................48

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GAMMA Surveyor
Introduction
Gamma Surveyor is a new group of multi-channel gamma-ray
spectrometers designed for measurements of natural and artificial
radioisotopes in ground, boreholes and laboratories. This group of
instruments covers a wide range of devices from radiameters and compact
handheld instruments to general purpose sets for field, borehole and
carborne surveys using various probes and types of detectors.
Gamma Surveyor is a useful tool for searching for radiation sources,
dose rate and gamma-ray spectra measurements, determination of
concentrations of elements (especially K, eU, eTh) and for other
applications in radiation monitoring, geophysical mapping, geological
studies, surveys for mining, laboratory analyses of samples etc.
Gamma Surveyor offers three basic measuring modes:
•quick and selective searching for gamma-ray sources
•precise radiometric measurements
•spectral measurements with determination of K, eU, eTh
concentrations
The measuring system supports point, profile and continuous
measurements with the use of external GPS data.
The methodology is based on the recommendation of IAEA
(International Atomic Energy Agency). The factory calibration is done on
high-volume standards. (For more detailed information see IAEA:
Guidelines for radioelement mapping using gamma ray spectrometry data,
IAEA-1363, 2003.)
Warning:
The instrument is equipped with a scintillation detector.
Avoid strong mechanical and temperature shocks!

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GAMMA Surveyor
Control Unit
Probes
External power
USB (PC)
GPS receive
r
Power / backlight key
Yes keyNo key
Left/Right keys
F-key
Numeric keys
Minus / decimal
point key
Battery charger
status
LCD display
Battery cover
Up/Down keys

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GAMMA Surveyor
Power Supply
The instrument can be supplied from internal lithium batteries, using
AC adapter or from the 12 V car socket or other external 12 V/2 A source.
For external power supply the connector „External power“ is to be used.
If the instrument is supplied from the internal batteries, their
condition is indicated in the upper right corner of the display.
Battery Charging
The battery charging is activated automatically when an external
power source is connected to the instrument. Thus a user can charge the
batteries either from a mains source or e.g. in a car.
The status of the battery charging is signalized by the control light
next to the display:
•Green colour – charging
•The light is off – charging has been finished
If there is a red or orange control light, the battery is defective and it
is necessary to disconnect the external power source immediately and to
exchange the battery (To do this press the sides of the battery cover and pull
it downwards, exchange the battery pack and return the cover on its original
place.)

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GAMMA Surveyor
Connections
Probe Connection
For the measurement with one probe connect the probe and the
instrument using the simple connection cable – one (either) end to the
connector on the probe, the other one to the right side connector „Probes“
on the instrument.
For measurement with more probes use the connection cable with
more connectors according to the figure below.
GPS Receiver Connection
Connect the GPS receiver using its serial port to the connector „GPS
receiver“. Set the GPS receiver to the mode for transmitting of the NMEA
type data, speed 4800 Bd without parity and activate GGA sentence
transmitting.
If the GPS receiver is set correctly, the spectrometer detects the GPS
data automatically and displays them in the window for setting of the
position.
Connection to PC
To connect the spectrometer and PC use the USB cable and connect
it to the „USB“ socket of the instrument and to the related socket of the PC.
See chapter Gamma Surveyor software for details.
Gamma Surveyor
Probe 1 Probe 2

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GAMMA Surveyor
Basic Operation of the Instrument
The basic instructions for the operation of the instrument are given
in this chapter.
Menu Handling
There are two possibilities how to choose the item from the
displayed menu (see fig. below):
1) Choose the item using “Up/Down“ keys and then press “Yes“ key.
2) Press the key with the number of the chosen item line. E.g. if you
would like to choose the item on the second line, press the key “2“.
For leaving the menu and return press “No“ key.
Main menu
1. Full Spectra & Assay
2. Dose Rate
3. Search
4. File Manager
5. Setting
Choice from List of Items
If a list of items (options) is displayed, it is possible to choose one
of them using “Left/Right“ keys.
E.g. it is possible to choose one from the available options (“Point /
Profile / Borehole / Continuous“) at the line “Meas. type“ in the screen -see
picture below.

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GAMMA Surveyor
New measurement
File name:
Locality:
Meas. type:
Note:
Laboratory
0 m 10 sMeas. time:
My test file 1
Point
Input of Numerical Values
Numerical values can be entered using keys “0“ to “9“ and
“Minus/Decimal point“ key. If the “Minus/Decimal point“ key is pressed at
first (before entering the number), it is displayed as a sign “minus”,
otherwise as a decimal point.
New measurement
File name:
Locality:
Meas. type:
Note:
Laboratory
0 m 10 sMeas. time:
My test file 1
Point
Text Input
Text can be entered using numerical keys in a way similar to mobile
phones. One of the signs available at the key can be chosen by its repeated
pressing (within 1 s). The cursor is moved to another sign after approx. 1s
(this time is signalized by a change of cursor) or when the “Right” key or
some other one is pressed. The “Left“ key can be used for erasing of the text
- backwards from the last sign.
The type of the signs - capital letters / small letters / numbers – can
be chosen using “F-key“. The actual choice is signalized in the upper right
corner of the display as follows: “Abc“ – initial letter capital, other ones