Cobia Sense
User Manual
English - v2015.1A
Cobia Sense - User Manual v2015.1A
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NOTICE
RTI Electronics AB reserves the right to make changes to the Cobia
Sense and the information in this user manual without prior notice.
RTI Electronics AB assumes no responsibility for any errors or
consequential damage that may result from the use or
misinterpretation of any information contained in this user manual.
Copyright © 2011-2015 by RTI Electronics AB. All rights reserved.
The content of this document may not be reproduced for any
purpose, other than supporting the use of the product, without prior
permission from RTI Electronics AB.
User Manual Downloads
www.rti.se/downloads
You can download user manuals here:
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Cobia Sense - User Manual v2015.1A
Contents
..............................................................................................................
4
1. Product Overview
............................................................................................................ 1.1 User Interface 6
...........................................................................................61.1.1 Screen Description 6
...........................................................................................81.1.2 Keyboard Operation 8
..............................................................................................................
9
2. Getting Started
............................................................................................................ 2.1 Before Starting the Cobia for the First Time 9
............................................................................................................ 2.2 Charging the Battery 9
..............................................................................................................
10
3. Performing a Measurement
............................................................................................................ 3.1 Measuring with an External Detector 10
............................................................................................................ 3.2 Measuring with a Light Probe 11
..............................................................................................................
11
4. Maintenance
............................................................................................................ 4.1 Scheduled Calibration 11
............................................................................................................ 4.2 Updating the System 12
..............................................................................................................
13
5. Technical Data
............................................................................................................ 5.1 Battery Charging Details 13
............................................................................................................ 5.2 Battery Warnings 14
............................................................................................................ 5.3 Communicating with a PC 14
..............................................................................................................
14
6. Troubleshooting
..............................................................................................................
15
7. Standards and Compliances
............................................................................................................ 7.1 Intended Use of the Cobia 15
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1 Product Overview
TOP VIEW
BOTTOM VIEW
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#
Name
Description
1
Display
Cobia display. See section Screen Description
2
Up arrow button
Used to move up in the user interface. See section Keyboard
Operation
3
Down arrow
button
Used to move down in the user interface. See section Keyboard
Operation
4
Left arrow button
Used to move left/back in the user interface. See section Keyboard
Operation
5
Right arrow
button
Used to move right or make a selection in the user interface. See
section Keyboard Operation
6
Menu and On/Off
button
Used to start and power off the Cobia, and display the system menu.
See section Keyboard Operation
7
Positioning
marker
Not applicable for the Sense model
8
Measurement
surface
Not applicable for the Sense model
9
Status indicator
Indicates functional status of the Cobia
10
External detector
input
Used to attach external measurement detectors or probes
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Battery charging
indicator
The orange battery charging indicator is lit when the battery is
charging. See section Battery Charging Details
12
Micro-USB
connector
Used both to charge and to connect the Cobia to a computer. See
sections Charging the Battery , Updating the System , and
Communicating with a PC
13
Measurement
center marking
Not applicable for the Sense model
14
Product label
Displays detailed information about the product and model (on the
bottom side)
15
Reset hole
Used to do a hardware reset of the Cobia. Marked "RST"(on the
bottom side)
6
8
8
9
9
8
13
9 12
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1.1 User Interface
1.1.1 Screen Description
Single view
List view
Menu view
A status field is displayed at the top of the screen. The left side of the field
shows the Radiation or Measurement Quality Code and a description of the
active range (1). The middle part of the field displays icons for when power
is supplied and when an external detector and/or internal MAS cable is
attached as well as warning symbols for when any settings are set to nonstandard values (2). The right side of the field displays an icon for external
power supply and an indicator for the battery level (3).
A simple user guide is displayed at the bottom of the screen. For each view,
the buttons that are functional in this view are shown, together with a
short text describing the function of the buttons (4-6).
Single view
In the Single view, only one active parameter
is displayed, represented by the value and
its unit. Each unit is shown by a specific color.
Pressing the up/down arrow buttons will
change the active parameter.
When using an external detector (EXT), a
corresponding indicator will appear in the
leftmost side of the unit field (not shown).
Note! The shown parameters may vary depending on the model of the
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Cobia. The example picture shows a tube voltage measurement with Cobia
Flex R/F kV & Dose.
Located to the left of the value, two symbols may be visible:
1. A play symbol (triangle) is visible during the
measurement. It is filled (green) during the radiation
detection, and will then stay contoured while the Cobia
accepts continued measurement during Restart Delay.
1B. When using the optional parameter cycling, a
rotating indicator will appear just above the play
symbol when the cycling is in progress.
2. A pulse indicator is shown below the play symbol.
This indicator is turned on when pulses are detected,
resulting in the display of additional pulse parameters.
List view
In the List view, all the available parameters
are shown simultaneously. The active
parameter (displayed in the Single view) is
indicated in color.
If a measurement is started when the Cobia
is in the List view, the display will switch to
the Single view during the measurement
and then return to the List view after completion. Parameters from EXT are
marked accordingly.
Note! The available parameters may vary depending on the model of the
Cobia. The example picture shows a pulsed measurement with Cobia Flex
R/F kV & Dose.
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Main Menu view
The Menu view displays a set of available
functions, selected by pressing the right
arrow button. Reset Measurement zeroes and
resets the meaurement. Prev. Measurements
recalls the results of earlier measurements.
Settings is for viewing and modifying the
measurement settings. Preferences is for
viewing and adjusting personal preferences. Any setting change that can
affect the measurement results will be shown in the status field (top of
screen). System Info gives detailed information about the Cobia, needed
during support. Power Off turns the Cobia off. When using an external
detector or probe, there will be an extra menu item, Ext.Detector, that
displays detector information and settings as described below.
Select External Detector Calibration
When an external detector containing more
than one calibration is connected to the
Cobia, a selection screen will be shown
(left).
For later calibration changes, the selection
screen is also available via the Menu.
1.1.2 Keyboard Operation
Menu and On/Off button
If Power = Off: Press once to start the Cobia
If Power = On: Press once to display the menu. Press
and hold to switch off the Cobia
In Menu view: Closes the menu
Up and Down arrow buttons
In Single view: Changes the active parameter shown
In List view: Changes the highlighted (active)
parameter
In Menu view: Moves the marker
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Right arrow button
In Single view: Switches the display to the List view
In Menu view: Activates the marked menu item
In the Settings or Preferences menus: Changes the set
value (displayed in yellow) or activates the menu
item
Left arrow button
In List view: Switches the display back to the Single
view
In Menu view: switches the display back to the
previous menu or screen
2 Getting Started
2.1 Before Starting the Cobia for the First Time
Before using the Cobia for the first time, make sure the unit is charged. See
Charging the Battery .
2.2 Charging the Battery
The battery can be charged in two ways:
Via the USB cable connected to a PC.
Via the USB cable connected to the included external charger.
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3 Performing a Measurement
3.1 Measuring with an External Detector
The description below describes how to use an external detector with the
Cobia.
1. Start the X-ray unit and start the Cobia.
2. If not already attached, you will be requested to attach the external
detector (shown below).
3. Set up the external detector unit. For an external dose probe, place the
detector at a clinically relevant distance (typically 50 - 100 cm from the
source), as described by the manual of the detector.
4. Attach the external detector to the Cobia.
5. If needed, select among the available calibrations (shown below).
6. Adjust the X-ray unit to the desired settings.
7. Start an exposure (or other signal).
8. When the measurement is over, the recorded values are by default
cycled on the Cobia display. Press the right arrow button to go to the List
view. All measurement results from the external input are marked with
an EXT symbol.
9. Record the results.
10.To repeat, start over from Step 6.
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3.2 Measuring with a Light Probe
In-depth instructions on how to use a Light Probe are found in the separate
Light Probe manual.
Attach the light probe monitor adapter (pictured below, left) for measuring
the luminance of a monitor or light box, or the lux adapter (below right) for
measuring illuminance (ambient light).
Position the probe in the desired location and read the result.
When using the luminance adapter, the recorded value is automatically
saved to the log function when using the shutter button. For illuminance
measurements, the down arrow button has to be pressed for a value to be
saved to the log.
Please note that there is no need to perform a reset before using the Light
Probe.
More information is available in the guide for Measuring with an External
Detector .
4 Maintenance
4.1 Scheduled Calibration
RTI recommends that the Cobia is calibrated every 24 months. Send your
Cobia to your local RTI distributor, who will send it to our service
department in Mölndal, Sweden, or New Jersey, USA. For contact details,
please see the back of this manual or the list of local RTI distributors on the
RTI website (www.rti.se).
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4.2 Updating the System
The Cobia system update can easily be done on any computer with support
for USB memories.
Below is a step-by-step guide for when using a computer with Windows OS,
but the procedure can be done on a computer with any OS, just as long as it
has a USB port.
1. Start by downloading the latest versions from www.rti.se/downloads,
using a web browser.
2. On a Windows PC, start a File Explorer window (WIN+E) and unpack the
downloaded Cobia Update zip file to a local drive.
3. Start the Cobia and connect the cable between the PC and the Cobia.
4. On the Cobia, press the menu button and enter the “System Info” menu.
Make sure that the update file contains a newer system version
than already present in the system.
5. If so, press and hold down the right arrow button for approximately
4 seconds to start the update mode. See images below.
6. After a short while, a USB memory device named COBIA (as shown below)
will appear in the File Explorer on the PC, and the Cobia display will show
“Waiting for update file”. Now, drag-and-drop the unpacked updater file
(.cobia) from the PC local drive using the File Explorer to the USB device
named COBIA.
7. A counter will now start on the Cobia display during the resource file
update procedure. It will take a few minutes. When the update is
completed the following screen will appear:
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8. Press any key to launch the updated Cobia firmware.
After the update, you may want to change the language of the Cobia user
interface. You will find this setting by pressing the menu button, and then
selecting User Preferences.
5 Technical Data
5.1 Battery Charging Details
The section Charging the Battery describes how the Cobia battery is
charged.
On the front face of the Cobia, there is an orange battery charging
indicator, marked . The indicator is lit when the battery is actively
charging. It will gradually turn off when the battery is getting closer to being
fully charged. Charging is also possible when the Cobia is powered off.
Approximate battery running and charging times:
Capacity
Running
time
Charging times (from empty)
Using Power supply
USB, Cobia ON
USB, Cobia OFF
50 %
7½ h
1½ h (90 min)
3½ h
17 h
80 %
12 h
2½ h (150 min)
6 h
27 h
90 %
13½ h
3¼ h (195 min)
7 h
30 h
100 %
15 h
5 h (300 min)
8½ h
32 h
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5.2 Battery Warnings
Warnings are shown when the battery is starting to run low (see below).
After the second warning, the system can suddenly shut down due to an
empty battery.
5.3 Communicating with a PC
The Cobia "Sense PC" model includes a user-friendly communication
protocol, allowing communication between the Cobia Sense and a
computer, including the Ocean version 2015 (or newer) software. The
protocol can also be integrated into other software. The protocol is
described in detail in the Cobia Reference Manual.
6 Troubleshooting
If you experience any problems with the Cobia, please go through the
following steps before contacting your local RTI distributor or RTI
Electronics:
A. Check the RTI website for system updates (www.rti.se).
B. Go through the checklist below.
The Cobia does not start:
If the Cobia does not start, try the following: Connect the charger and
retry starting the Cobia. If it does start, then the battery was too low to
start. If this does not help, try resetting the Cobia as described below.
The external detector gives false readings:
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The external detector cable is very sensitive when using certain probe
types. Try not to move the detector while attached to the Cobia. To reset
false readings, use the Reset Measurement on the menu.
How do I reset the Cobia?
There is a reset hole on the bottom face of the Cobia, marked RST. Insert
the end of a paper clip or similar to reset the Cobia.
7 Standards and Compliances
For standards and compliances, see the Reference Manual.
7.1 Intended Use of the Cobia
Accessory to diagnostic X-ray equipment to be used as an electrometer.
Together with external probes it is to be used for independent service and
quality control, as well as measurements of kerma, kerma rate, kerma
length product, kVp, tube current, exposure time, luminance, and
illuminance within limitations stated below.
If installed according to accompanying documents, the product is intended
to be used together with all diagnostic X-ray equipment except for:
therapeutical X-ray sources.
X-ray equipment with tube potential below 18 kV.
X-ray equipment on which the instrument cannot be mounted properly,
e.g. equipment where the beam field size is narrower than the active
part of the detector.
specific types of X-ray equipment listed in the instructions for use or in
additional information from the manufacturer.
With the X-ray installation in stand-by conditions without patients
present, the product is intended to be used:
to provide the operator with information on radiation beam parameters
that might influence further steps in an examination but not an ongoing
exposure.
for assessing the performance of the X-ray equipment.
for evaluation of examination techniques and procedures.
for service and maintenance measurements.
for quality control measurements.
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for educational purposes, authority supervision etc.
The product is intended to be used by hospital physicists, X-ray engineers,
manufacturer's service teams, and other professionals with similar tasks
and competencies. The operator needs a short training to be able to use
the product as intended. This training can be achieved either by careful
study of the manual, studies of the built-in help function in measurement
software or, on request, in a short course ordered from the manufacturer.
The product is intended to be used inside X-ray rooms ready for clinical use
and can safely be left switched on and in any measuring mode in the
vicinity of patients.
The product is NOT intended to be used:
- for direct control of diagnostic X-ray equipment performance during
irradiation of a patient.
- so that patients or other unqualified persons can change settings of
operating parameters during and immediately before and after
measurements.
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NOTES
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NOTES
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NOTES
Contact Information World Headquarters
RTI Electronics AB
Flöjelbergsgatan 8 C
SE-431 37 MÖLNDAL, Sweden
Phone: +46 31 7463600
Fax: +46 31 270573
Sales: sales@rti.se
Support: support@rti.se
Service: service@rti.se
Web: www.rti.se
Contact Information US Office
RTI Electronics Inc.
33 Jacksonville Road, Bldg. 1,
Towaco, NJ 07082, USA
Phone: 1-800-222-7537
(Int. +1-973-439-0242)
Fax: Int. +1-973-439-0248
Sales: sales@rtielectronics.com
Support: support@rtielectronics.com
Service: service@rtielectronics.com
Web: www.rti.se
RTI art icle nu mber: 476 0.00 1277
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