RaySafe X2 help - RaySafe Media Bank

RaySafe X2 help - RaySafe Media Bank
USER MANUAL
RaySafe X2
Please consult the built-in help in your base unit
to ensure that you read a version corresponding to your specific instrument setup.
© 2016.12 Unfors RaySafe 5001083-6
All rights are reserved. Reproduction or transmission in whole or in part, in any form or by any means,
electronic, mechanical or otherwise, is prohibited without the prior written consent of the copyright owner.
RaySafe X2 User Manual
CONTENTS
GENERAL
About the X2 system
Navigate the base unit
View measurement
Access archived measurements
Change parameter view
Analyze waveforms
Connect the base unit to a computer
Connect to computer using Bluetooth
Upgrade the base unit software
Charge the battery
Use the flexi stand
Setting: Screen brightness
Setting: Speaker volume
Setting: Time and date
Final disposal of the system
Regulatory information
R/F SENSOR
Measure with R/F Sensor
R/F: Measurement definitions
R/F: Sensor specifications
Setting: Units
Setting: Stop delay
Setting: Ignore prepulses
Setting: Correction factor
MAM SENSOR
Measure with MAM Sensor
Mo/Rh kV with MAM sensor
W/Al scanning with MAM sensor
MAM: Measurement definitions
MAM: Sensor specifications
Setting: kVp mode
Setting: Units
Setting: Stop delay
Setting: Ignore prepulses
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CT SENSOR
Measure with CT Sensor
Measure kVp on CT
CT: Measurement definitions
CT: Sensor specifications
Setting: Units
Setting: Stop delay
LIGHT SENSOR
Measure with Light Sensor
Light: Measurement definitions
Light: Sensor specifications
Setting: Units
SURVEY SENSOR
Measure with Survey Sensor
Zero adjust
Survey: Measurement definitions
Survey: Sensor specifications
Setting: Trig mode
Setting: Units
Setting: Stop delay
MAS
Measure mAs
mAs: Measurement definitions
Setting: Stop delay
Setting: Ignore prepulses
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ABOUT THE X2 SYSTEM
The RaySafe X2 consists of a base unit, sensors and the X2 View computer software.
The sensors options are:
R/F, for radiography and fluoroscopy measurements, with or without a phantom between the sensor
and the
X-ray source.
MAM, for all kinds of mammography measurements.
CT, an ionization chamber for measurements on CT dose applications.
Light, for illuminance measurements and luminance measurements on monitors and light boxes.
Survey, a sensitive sensor for measuring leakage and scattered radiation, as well as other
applications with low dose rate.
mAs, an integrated tube current meter.
X2 View is a PC software for use with the X2 instruments. In X2 View, you can view measurements and
waveforms on a larger display, store measurements, transfer data to Excel or other software and get
software updates for the base unit.
When you want to measure, all you need to do is:
1.
2.
3.
4.
Turn on the base unit
Connect a sensor
Position the sensor
Expose
For more detailed information, see the help chapter for each sensor.
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NAVIGATE THE BASE UNIT
The base unit has a touch screen and three buttons.
Swipe up and down on the home screen to access your previously recorded measurements.
Swipe right
from the home screen to go to the setup screen, from which you can make settings and view
information
about the system, for example the calibration date for a connected sensor.
Tap on a parameter to get larger
digits, one parameter at a time. You can also measure in this mode.
From the single parameter screen, you
can swipe right to view the measurement specifications, and left to see waveforms, if available.
The three buttons below the screen are:
Menu, brings up a menu on the screen
Home, takes you to the home screen
Back, takes you back to the previous screen
On the back side of the base unit are:
Reset switch, for forced reboot of the base unit
Charger/PC connector, for charging or using with a PC with X2 View
mAs connector, for tube current measurements
Two sensor connectors
Ethernet connector, for future use
On/Off switch. Press the button shortly to enter sleep mode. After a while in sleep mode,
the base
unit will turn off automatically. Press the button for 2 seconds to turn off the base unit immediately.
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VIEW MEASUREMENT
Swipe up or down to scroll between measurements. Tap on a parameter to get larger digits. Swipe right to
access the parameter information with measurement specifications. Swipe left to view a waveform, if
available for the current parameter.
Press the menu button and select Notes to access more information about the measurement and to be able
to add a note.
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ACCESS ARCHIVED MEASUREMENTS
Measurements from previous sessions are automatically archived in the base unit. The memory allows
about 10000 measurements. When the memory is full, the oldest measurements are automatically deleted.
The measurements are sorted by date and time.
VIA BASE UNIT
To access archived measurements, press the menu button and select Measurement archive. Select a
session to see the individual measurements for that session. Swipe up or down to scroll between
measurements.
VIA X2 VIEW
To access archived measurements via X2 View, connect the base unit to a computer running X2 View and
select Import from base unit under the File menu.
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CHANGE PARAMETER VIEW
To change the number of parameters showed on the home screen, press the menu button
and select
Change view. There are two views to toggle between:
All measured parameters, or
Four key parameters of your own choice. Press and hold on a box to select which parameter to show.
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ANALYZE WAVEFORMS
View a single parameter by tapping on that parameter on the home screen. Swipe left to go to the
waveform screen.
The dark line represents an average of the measured values.
If there are more values than possible to show on the screen,
the light blue pixles represent the range of these values.
The dashed lines indicate the measured parameter values, in
this case average dose rate and time.
Tap on the button in the upper right corner to analyze the waveform.
Slide the handles to view, for example, the peak dose rate of
a pulse.
Pinch with two fingers to zoom in the waveform area.
Tap the button again to exit the analyze mode.
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CONNECT THE BASE UNIT TO A COMPUTER
Connect the base unit to a computer running X2 View using a
USB cable (recommended length: max 2 m). X2 View can be
installed from the X2 View CD, that came with the system.
If you measure, the results will automatically show up in X2
View.
You can also select Import from Base Unit in the File menu to
import measurements stored in the base unit.
From X2 View, you can export measurements to Excel and
other software. For more information, see the X2 View help,
reached from the Help menu in X2 View.
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CONNECT TO COMPUTER USING BLUETOOTH
Connect the Bluetooth adapter to a SENSOR port on the base
unit. A gray Bluetooth status symbol appears in the upper
right
corner of the screen.
X2 View will automatically search for base units. The first time you connect, you will have to select your
base unit from the Bluetooth menu in X2 View. The Bluetooth status symbol will turn white when connected.
When restarting X2 View, the base unit will automatically get connected.
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UPGRADE THE BASE UNIT SOFTWARE
Connect the base unit to a computer running X2 View and
make sure that the computer is connected to internet. If there
are any updates available, the X2 Online field will show a
notification symbol. Click on that symbol and follow the
instructions to upgrade the software.
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CHARGE THE BATTERY
To charge the base unit, connect it to a wall socket with the included power supply. The charging time is
approximately 4 hours.
The battery lasts for about one day of extensive usage, which means that it is recommendable to start your
working day with a fully charged unit.
The X2 system automatically enters power saving mode when idle for some minutes. If the system does not
wake up by radiation or the buttons on the front, press the power button.
TIP! The base unit will maintain the energy level when connected to a computer.
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USE THE FLEXI STAND
The flexi stand can be used in many different setups. Below are some examples.
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SETTING: SCREEN BRIGHTNESS
Adjust the screen brightness by sliding the bar.
Reduce the brightness to prolong the base unit battery time.
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SETTING: SPEAKER VOLUME
0 % turns the speaker off and 100 % is max volume.
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SETTING: TIME AND DATE
Set time and date according to your local time. Measurements are automatically stored in the base unit,
sorted by time.
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FINAL DISPOSAL OF THE SYSTEM
Final disposal is when the user disposes of the product in such a way that it can no longer be used for its
intended purpose(s).
In the European Union (the WEEE directive), this label indicates that this product should not be disposed of
with
household waste.
This product should be disposed of at an appropriate facility to enable recovery and recycling.
Unfors RaySafe supports users in:
Recovering reusable parts.
Recycling of useful materials by competent disposal companies.
Safe and effective disposal of product.
For advice and information, contact your Unfors RaySafe Service Organization first, or otherwise the
manufacturer.
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REGULATORY INFORMATION
N28111
Unfors RaySafe K.K.
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MEASURE WITH R/F SENSOR
Place the connected sensor centered in the field with the
crosshair towards the X-ray source. The angle of the sensor in
the horizontal plane has no impact on the measurement result.
Expose.
Read the result.
TIP! Tap a parameter to get large digits, parameter information, and, if applicable,
waveform. Switch between these by swiping sideways.
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NOTE! The dark line centered in the circle represents the active area of the sensor. The
lines on the side of the housing marks the vertical position.
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R/F SENSOR: MEASUREMENT PARAMETER
DEFINITIONS
Dose and HVL are calculated from all recorded data.
Dose rate is the average dose rate, calculated as dose/time.
Time starts the first time the dose rate waveform reaches 50% of peak, and ends the last time it drops
below 50%. Live readings are time since start trig.
kVp and total filtration are calculated from an average of samples above ~90 % of peak signal level.
Pulses are counted at every start trig with more than 4 ms since last end trig.
Pulse rate and dose per pulse are averages from the last 6 pulses.
For measurements longer than 3 s, the final readings of dose rate, kVp, HVL and total filtration are moving
averages ending approximately 1–2 s before end trig. Live readings are moving averages.
PARAMETERS IN DOSE RATE WAVEFORM
T: Time
P1, P2, P3: Pulses
DR: Dose rate
: Dose
PARAMETERS IN TUBE VOLTAGE WAVEFORM
T: Time
P1, P2, P3: Pulses
kVp: Peak tube voltage
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NOTE! If measurements are made simultaneously with the R/F sensor and mAs cable,
any shared parameter (time, pulses or pulse rate) will be taken from the R/F sensor.
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R/F SENSOR: SPECIFICATIONS
Dimensions:
Weight:
Storage temperature:
Storage humidity:
Operating temperature:
Operating atmospheric pressure:
Operating humidity:
Reference point:
Direction of incident radiation:
Minimum field of uniform
radiation:
Angular deviation, dose:
Backscatter:
14 × 22 × 79 mm (0.5 × 0.9 × 3.1 in)
42 g (1.5 oz)
-25 – +70 °C (-13 – +158 °F)
Non-condensing
15 – 35 °C (59 – 95 °F)
70 – 110 kPa (3000 m above sea level)
< 80 % relative humidity, non-condensing
Center of upper sensor marking, depth indicated by line on the sensor
side
Orthogonal to the sensor marking surface
The thick solid line marked on the sensor
< 1% within ± 10°
Insensitive to scattered radiation outside ± 70°
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SETTING: UNITS
Select displayed unit for dose and dose rate.
1 Gy = 114.1 R
NOTE! X2 systems approved by PTB do not have the possibility to change dose unit to
Röntgen (R).
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SETTING: STOP DELAY
The stop delay setting defines for how long the instrument will wait for more radiation to include in the
same measurement.
Use a longer stop delay when measuring on a pulsed fluoroscopy system or to get a prepulse recorded into
the same measurement as the following ordinary exposure.
Stop delay setting longer than the time between pulses (t>T), will result in one long measurement. Note that
you have to wait as long as the stop delay setting (t) after the last exposure before the measurement ends
and values will be displayed.
Stop delay setting shorter than the time between pulses (t<T), will result in many short measurements (one
for each pulse).
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SETTING: IGNORE PREPULSES
Use the ignore prepulses setting to remove one or many unwanted prepulses from the measurement.
Ignore prepulses = 0, the whole exposure is captured.
Ignore prepulses = 1, the (first) prepulse is excluded from the measurement.
NOTE! This setting will affect all parameters, including the dose measurement.
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SETTING: CORRECTION FACTOR
For some specific measurement setups, a correction factor is applicable. In all other cases, use None.
When measuring kV on a GE CT machine with 10.5° anode angle (GE Revolution CT), select GE CT 10.5° to
use a correction factor specifically adapted for maximum kV accuracy on such machines. Measure without
bow tie filter if possible. This setting affects only the kVp value and is intended for GE Field Service
Engineers.
When measuring kV on a GE CT machine with 7° anode angle (all other GE CT machines), select GE CT 7° to
use a correction factor specifically adapted for maximum kV accuracy on such machines. Measure without
bow tie filter if possible. This setting affects only the kVp value and is intended for GE Field Service
Engineers.
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MEASURE WITH MAM SENSOR
The MAM sensor is ready to measure dose and HVL for all
anode/filter combinations without changing any settings.
Place
the connected sensor centered in the field, with the crosshair
6 cm (4 cm in the US) from the examination table front edge
(A). The angle in the horizontal plane has neglectable impact
on the measurement result.
For kVp measurements, select your anode/filter combination
in the sensor settings, or by swiping right from the home
screen to access the quick settings.
NOTE! When measuring kV on Mo/Rh, use the included 2 mm Al filter. Follow the
instructions printed on the filter.
Expose.
Read the result.
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TIP! Tap a parameter to get large digits, parameter information, and, if applicable,
waveform. Switch between these by swiping sideways.
NOTE! The dark line centered in the circle represents the active area of the sensor. The
lines on the side of the housing marks the vertical position.
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MO/RH KV WITH MAM SENSOR
Place the sensor centered and 6 cm from the chest wall.
Place
the 2 mm Al filter on the sensor. Be sure to cover the active
sensor area.
Recommended generator setting ≥ 100 mAs.
Select Mo/Rh 2 mm Al in the sensor settings.
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W/AL SCANNING WITH MAM SENSOR
Mount the X2 MAM sensor in the holder.
Place the holder centered on the table, tight to the chest wall.
Settings:
Philips MicroDose: Stop delay: 2 s. W/Al Philips, if kVp is desired.
Fischer SenoScan: Stop delay: 2 s. W/Al, if kVp is desired.
Adani: Stop delay: 2 s. W/Al, if kVp is desired.
Always use the compression paddle, positioned as high as possible. Do not use the AEC functionality.
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MAM SENSOR: MEASUREMENT PARAMETER
DEFINITIONS
Dose and HVL are calculated from all recorded data.
Dose rate is the average dose rate, calculated as dose/time.
Time starts the first time the dose rate waveform reaches 50% of peak, and ends the last time it drops
below 50%. Live readings are time since start trig.
kVp is calculated from an average of samples above ~33 % of peak signal level.
Pulses are counted at every start trig with more than 4 ms since last end trig.
Pulse rate and dose per pulse are averages from the last 6 pulses.
Live readings of dose rate, kVp and HVL are moving averages. Final readings are based on the whole
measurement.
PARAMETERS IN DOSE RATE WAVEFORM
T: Time
P1, P2, P3: Pulses
DR: Dose rate
: Dose
PARAMETERS IN TUBE VOLTAGE WAVEFORM
T: Time
P1, P2, P3: Pulses
kVp: Peak tube voltage
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NOTE! If measurements are made simultaneously with the MAM sensor and mAs cable,
any shared parameter (time, pulses or pulse rate) will be taken from the MAM sensor.
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MAM SENSOR: SPECIFICATIONS
Dimensions:
Weight:
Storage temperature:
Storage humidity:
Operating temperature:
Operating atmospheric pressure:
Operating humidity:
Reference point:
Direction of incident radiation:
Minimum field of uniform
radiation:
Angular deviation, dose:
Backscatter:
14 × 22 × 79 mm (0.5 × 0.9 × 3.1 in)
42 g (1.5 oz)
-25 – +70 °C (-13 – +158 °F)
Non-condensing
15 – 35 °C (59 – 95 °F)
70 – 110 kPa (3000 m above sea level)
< 80 % relative humidity, non-condensing
Center of upper sensor marking, depth indicated by line on the sensor
side
Orthogonal to the sensor marking surface
The solid line marked on the sensor
< 1% within ± 10°
Insensitive to scattered radiation outside ± 45°
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SETTING: KVP MODE
The MAM sensor is ready to measure dose and HVL for all beam qualities without any settings. However, to
get a kVp reading you have to select a beam quality.
If your beam quality is not in the list, you have to change your anode/filter combination to one of the listed.
Expose, and you will get a kVp reading which is applicable to all anode/filter combinations for the
mammography machine (since the high voltage generator will behave identically regardless of selected
anode/filter combination).
NOTE! This setting will only affect the kVp measurement.
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SETTING: UNITS
Select displayed unit for dose and dose rate.
1 Gy = 114.1 R
NOTE! X2 systems approved by PTB do not have the possibility to change dose unit to
Röntgen (R).
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SETTING: STOP DELAY
The stop delay setting defines for how long the instrument will wait for more radiation to include in the
same measurement.
Use a longer stop delay when measuring on a pulsed fluoroscopy system or to get a prepulse recorded into
the same measurement as the following ordinary exposure.
Stop delay setting longer than the time between pulses (t>T), will result in one long measurement. Note that
you have to wait as long as the stop delay setting (t) after the last exposure before the measurement ends
and values will be displayed.
Stop delay setting shorter than the time between pulses (t<T), will result in many short measurements (one
for each pulse).
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SETTING: IGNORE PREPULSES
Use the ignore prepulses setting to remove one or many unwanted prepulses from the measurement.
Ignore prepulses = 0, the whole exposure is captured.
Ignore prepulses = 1, the (first) prepulse is excluded from the measurement.
NOTE! This setting will affect all parameters, including the dose measurement.
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MEASURE WITH CT SENSOR
Push the connected sensor tight into the phantom ...
... or use the flexi stand for positioning free in air.
Expose.
Read the result.
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NOTE! The effective length of the CT sensor is 100 mm, and is marked with center and
edge lines on the tube.
TIP! Tap a parameter to get large digits, parameter information, and, if applicable,
waveform. Switch between these by swiping sideways.
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MEASURE KVP ON CT
For kVp measurements, use an R/F sensor. Position it flat on
the table and expose without rotation, using scout, tomogram
or topogram mode. Use no or slowest table movement.
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CT SENSOR: MEASUREMENT PARAMETER
DEFINITIONS
Dose is calculated from all recorded data.
Dose rate is the average dose rate, calculated as dose/time. For measurements longer than 3 s,
intermediate readings are moving averages.
Time starts the first time the dose rate waveform reaches 50% of peak, and ends the last time it drops
below 50%. Intermediate readings are time since start trig.
Dose length product is dose·10 cm.
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CT SENSOR: SPECIFICATIONS
Dimensions:
14 × 22 × 219 mm (0.5 × 0.9 × 8.6 in)
Diameter:
12.5 mm (0.5 in)
Weight:
86 g (3.0 oz)
Storage temperature:
-25 – +70 °C (-13 – +158 °F)
Storage humidity:
Non-condensing
Operating temperature:
15 – 35 °C (59 – 95 °F)
Operating atmospheric pressure: 70 – 110 kPa (3000 m above sea level)
Operating humidity:
< 80 % relative humidity, non-condensing
Effective length:
100 mm (3.94 in), indicated by the two white lines on the sensor
Direction of incident radiation: ± 180°
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SETTING: UNITS
Select displayed unit for dose and dose rate.
1 Gy = 114.1 R
NOTE! X2 systems approved by PTB do not have the possibility to change dose unit to
Röntgen (R).
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SETTING: STOP DELAY
The stop delay setting defines for how long the instrument will wait for more radiation to include in the
same measurement.
Use a longer stop delay when using a phantom and a slow rotation rate, to prevent that an axial scan will be
cut into two measurements.
Stop delay (t) setting longer than the time between pulses (t>T), will result in one long measurement. Note
that you have to wait as long as the stop delay setting (t) after the last exposure before the measurement
ends and values will be displayed.
Stop delay setting (t) shorter than the time between pulses (t<T), will result in many short measurements
(one for each pulse).
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MEASURE WITH LIGHT SENSOR
Luminance: Place the connected sensor with the aperture centered
on the area you want to measure, and with luminance selected on
the sensor wheel.
Illuminance: Place the connected sensor with the diffuser in
the direction you want to measure, and with illuminance
selected on the sensor wheel.
The sensor is constantly measuring. If you want to store a value,
press the button once the reading is stable.
The measurement will
continue below the stored value.
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TIP! Tap a parameter to get large digits and parameter information. Switch between
these by swiping sideways.
Zero adjust: If prompted to make a zero adjust, select zero
adjust (0) on the sensor wheel. The zero adjust will take
approximately 10 s.
NOTE! Store the sensor with the sensor wheel in a closed position (0 or illuminance),
to
prevent dust in the optics.
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LIGHT SENSOR: MEASUREMENT PARAMETER
DEFINITIONS
Illuminance is the amount of light incident on a surface.
Luminance is the amount of light emitted from a surface.
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LIGHT SENSOR: SPECIFICATIONS
Dimensions:
48 × 60 × 68 mm (1.9 × 2.4 × 2.7 in)
Weight:
136 g (4.8 oz)
Storage temperature:
-25 – +70 °C (-13 – +158 °F)
Storage humidity:
Non-condensing
Operating temperature:
15 – 35 °C (59 – 95 °F)
Operating atmospheric pressure: 70 – 110 kPa
Operating humidity:
< 80 % relative humidity, non-condensing
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SETTING: UNITS
Select between
cd/m² and lux, or
fL and fc
1 cd/m² = 0.2919 fL (luminance)
1 lux = 0.09290 fc (illuminance)
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MEASURE WITH SURVEY SENSOR
Position the sensor with the dark side towards the radiation
source.
If you measure in manual trig mode, press Start or Stop
whenever you want to begin or end measuring.
If you measure in auto trig mode, measurement is triggered
by radiation.
You can also use the sensor for low dose rate measurements,
positioned centered in the X-ray field, with the dark side
towards the radiation source.
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NOTE! Dose rate readings may need some time to return to zero after high radiation
levels, due to afterglow in the scintillators.
TIP! Tap a parameter to get large digits, parameter information, and, if applicable,
waveform. Switch between these by swiping sideways.
NOTE! The dark entrance window represents the active area of the sensor. The lines on
the side of the housing marks the vertical position.
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SURVEY SENSOR: ZERO ADJUST
A zero adjustment is needed either when prompted by the instrument or when the dose rate appears too
high even if no radiation is present. You can initiate a zero adjustment by pressing the >0< button. You will
then get the option to either adjust, or to reset to the factory zero.
ADJUST
A new zero adjustment will vary between 30 and 90 seconds, depending on environmental factors, such as
temperature. If the zero adjustment fails, try again. Make sure that the temperature is stable and that the
sensor is not irradiated during the process.
RESET
The factory zero is a generic zero adjustment performed when the sensor was produced. It is designed to
be valid for most measurement occasions. You can reset to the factory zero at any time by pressing >0< and
then Reset. This can be useful for example in an environment without possibility to shield the sensor from
radiation, which is needed to get a proper result from a zero adjustment.
NOTE! The zero adjustment is saved in the base unit.
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SURVEY SENSOR: MEASUREMENT PARAMETER
DEFINITIONS
DURING MEASUREMENT
Time is the total time since start of measurement.
Dose is calculated from all recorded data since start of measurement.
Dose rate and mean energy are moving averages.
FINAL READINGS
Auto trig mode
Time starts the first time the dose rate waveform reaches 50% of peak and ends the last time it drops below
50% of peak.
Dose is calculated from all recorded data.
Dose rate is calculated as dose/time or, for measurements longer than 3 s, as a moving average ending
approximately 1–2 s before end of measurement.
Mean energy is calculated from all recorded data or, for measurements longer than 3 s, as a moving
average ending approximately 1–2 s before end of measurement.
Manual trig mode
Time is calculated as the time from when you press record until you press stop.
Dose is calculated from all recorded data.
Dose rate peak (^) is the highest dose rate recorded during measurement. A waveform is displayed if the
peak dose rate exceeds 1 µSv/h or 1 µGy/h (0.1 mR/h).
Mean energy is calculated from all recorded data.
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SURVEY SENSOR: SPECIFICATIONS
Dimensions:
Weight:
Storage temperature:
Storage humidity:
Operating temperature:
Operating atmospheric
pressure:
Operating humidity:
14 × 66 × 192 mm (0.5 × 2.6 × 7.6 in)
140 g (4.9 oz)
-25 – +70 °C (-13 – +158 °F)
Non-condensing
15 – 35 °C (59 – 95 °F)
70 – 110 kPa (3000 m above sea level)
< 80 % relative humidity, non-condensing
Center of entrance window, at a depth indicated by lines at the sides of
Reference point:
the sensor
Direction of incident radiation: Orthogonal to the entrance window
Minimum field of uniform
Size of entrance window; 67 × 73 mm (2.6 × 2.9 in)
radiation:
Angular deviation, dose:
< 1% within ± 10°
Backscatter:
Back side of sensor protected
Sound:
Tick frequency proportional to the measured dose rate
Angular deviation, dose:
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SETTING: TRIG MODE
The trig mode setting affects both how a measurement is triggered and which parameters are displayed.
AUTO
When in auto trig mode, start of measurement is triggered by radiation, with trig level (N80) 20 μSv/h or 10
μGy/h (1.2 mR/h). The sensor is in this mode useful as a sensitive dose rate meter, placed in the primary X-ray
field.
Parameter displayed are:
accumulated dose,
time,
instantaneous dose rate (final reading: average dose rate),
mean energy.
MANUAL
In manual trig mode, you can start and stop the measurement from the base unit. This mode is suitable for
measuring leakage or scattered radiation from X-ray equipment and γ-emitting isotopes.
Parameters displayed are:
accumulated dose,
time,
instantaneous dose rate (final reading: peak dose rate),
mean energy.
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SETTING: UNITS
Select displayed unit for dose and dose rate.
Air kerma, Kair, is measured in Gy or R, where 1 Gy = 114.1 R.
Ambient dose equivalent, H*(10), is measured in Sv.
Typical response:
NOTE! X2 systems approved by PTB do not have the possibility to change dose unit to
Röntgen (R).
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RaySafe X2 User Manual
SETTING: STOP DELAY
The stop delay setting defines for how long the instrument will wait for more radiation to include in the
same measurement.
Use a longer stop delay when measuring on a pulsed fluoroscopy system or to get a prepulse recorded into
the same measurement as the following ordinary exposure.
Stop delay setting longer than the time between pulses (t>T), will result in one long measurement. Note that
you have to wait as long as the stop delay setting (t) after the last exposure before the measurement ends
and values will be displayed.
Stop delay setting shorter than the time between pulses (t<T), will result in many short measurements (one
for each pulse).
NOTE! This setting will only affect measurements in auto trig mode.
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RaySafe X2 User Manual
MEASURE MAS
Switch off the X-ray generator.
Remove the jumper.
Connect the mAs cable to the base unit and to the generator.
Switch on the X-ray generator.
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RaySafe X2 User Manual
Make an exposure and read the result.
NOTE! Users of RaySafe X2 mAs must be aware of the potential damage to generators
and of electrical human hazards in case of improper connection or damaged equipment.
RaySafe X2 mAs is intended for use only by personnel authorized in performing
calibration and repair of X-ray equipment.
TIP! You can measure with the R/F or MAM Sensor and the mAs cable both connected to
get radiation and generator current values at the same time.
TIP! Tap a parameter for large digits, to get information about that specific parameter,
and, if applicable, see a waveform.
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RaySafe X2 User Manual
MAS: MEASUREMENT PARAMETER DEFINITIONS
mAs is calculated from all recorded data.
mA is calculated as an average of all samples above 50% of peak. Rush currents are automatically removed.
Live readings are based on samples since last reading. For long measurements, the final reading is recorded
approximately 1–2 s before end trig.
Time starts the first time the current reaches 50% of the calculated mA and ends the last time it drops below
50%. Live readings are time since start trig.
Pulses are counted every time the signal reaches trig.
Pulse rate and mAs per pulse are averages for the last 6 pulses.
PARAMETERS IN MA WAVEFORM
T: Time
P1, P2, P3: Pulses
mA: mA
: Displayed mAs value.
NOTE! If measurements are made simultaneously with a sensor and mAs cable, any
shared parameter (time, pulses or pulse rate) will be taken from the sensor.
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RaySafe X2 User Manual
SETTING: STOP DELAY
The stop delay setting defines for how long the instrument will wait for more radiation to include in the
same measurement.
Use a longer stop delay when measuring on a pulsed fluoroscopy system or to get a prepulse recorded into
the same measurement as the following ordinary exposure.
Stop delay setting longer than the time between pulses (t>T), will result in one long measurement. Note that
you have to wait as long as the stop delay setting (t) after the last exposure before the measurement ends
and values will be displayed.
Stop delay setting shorter than the time between pulses (t<T), will result in many short measurements (one
for each pulse).
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RaySafe X2 User Manual
SETTING: IGNORE PREPULSES
Use the ignore prepulses setting to remove one or many unwanted prepulses from the measurement.
Ignore prepulses = 0, the whole exposure is captured.
Ignore prepulses = 1, the (first) prepulse is excluded from the measurement.
NOTE! This setting will affect all parameters, including the dose measurement.
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