User Manual

GENERAL
EMC tested according to EN 61000-6-1:2007
and EN 61000-6-3:2007.
Dimension: 108x45x13 mm
(4.3x1.8x0.5 in)
Weight: 70 g (2.5 oz)
Display: 128x64 pixels LCD
Power on: auto, radiation triggered
Power o: 150 s after exposure
Battery: 3V, CR2450
Trig level: 0.1 mGy/s (0.7 R/min)
DOSE
Range: 20 µGy – 999 mGy
(2.3 mR – 114 R)
at > 70 kV
Minimum dose at 50 kV:
100 µGy (11.4 mR)
Resolution: 1 µGy (0.1 mR)
Uncertainty: 5 %
DOSE RATE
Range: 0.1 mGy/s – 100 mGy/s
(0.7 R/min – 685 R/min)
at > 70 kV
Minimum dose rate at 50 kV:
0.5 mGy/s (3.4 R/min)
Resolution: 0.01 mGy/s (0.1 R/min)
Uncertainty: 5 %
KVP
1
Range: 45 – 150 kVp
Resolution: 0.5 kVp
Uncertainty: 3 %
HVL
Range: 1.0 – 10.0 mm Al
Resolution: 0.1 mmAl
Uncertainty: 10 % or 0.2 mm Al
EXPOSURE TIME
Range: 10 ms – 10 s
Resolution: 1 ms
Uncertainty: 0.5 %
Bandwidth: 0.5 kHz
PULSES
Number of pulses: 3–999 (Max 375 ms dead
time between pulses.)
Uncertainty: 1 pulse
ACTIVE COMPENSATION
1.5 mm Al – 0.5 mm Cu total filtration
for 45 – 125 kV.
2.5 mm Al – 10 mm Al total filtration
for 125 – 150 kV
1) When measuring on an AMX4 or AMX4+,
multiply the displayed kVp value with 1.055 to
get the correct kVp.
PARAMETERS
Instrument model Dose kVp Dose rate HVL Time Pulses
RAD
RAD kVp
RAD Dose
DEFINITIONS
Exposure time is measured from start trig until the signal drops below 25% of max (HF/DC), or
from the first pulse that has a peak above 25% of max until the last time the signal drops below
25% of max (AC).
All recorded samples are used to calculate dose and HVL.
Dose rate is (dose)/(exposure time).
kVp is calculated from 5 ms after trig until the signal drops below 75% of peak (HF/DC), or from
pulses with a peak signal level above 75% of maximum (AC).
LED INDICATION
Unfors ThinX RAD has three LED:s. Normal state is an idle blink every fourth second.
• Green
Idle blink: The instrument is ready to use.
Intense blink: An exposure has been recorded..
• Yellow Replace the battery. 100 exposures left.
• Red
Idle blink: Replace the battery. No further measurements are allowed.
Intense blink: An error has occurred. See details on display.
DISPLAY MESSAGES
Exposure error message Action
Low signal Increase dose, dose rate or kV.
High signal Decrease dose, dose rate or kV.
Radiation during calculation Wait longer between exposures or make the time between
pulses shorter than 375 ms.
Total filtration > specification Decrease the amount of filtration.
Time < 10 ms Increase exposure time.
Time > 10 s Decrease exposure time.
Dose < 20 µGy (2.3 mR) Increase dose.
Dose > 999 mGy (114 R) Decrease dose.
Dose rate < 0.1 mGy/s (0.7 R/min) Increase the dose rate.
Dose rate > 100 mGy/s (685 R/
min)
Decrease the dose rate.
Number of pulses < 3 for kVp Increase the number of pulses to make an AC kVp calculation.
kVp < 45 kVp Increase kVp.
kVp > 150 kVp Decrease kVp.
Number of pulses > 999 Decrease the number of pulses.
Information message Action
Battery low. 100 exposures left. Replace the battery.
Battery low. Replace battery. Replace the battery immediately. No further measurements
allowed.
Instrument error Please write down the error code and contact support
(contact information on back side of this manual).
SPECIFICATIONS
Dose
kVp Number of pulses
Time
HVL
Dose rate
Note! If any parameter is out of range, no measurement results will be shown.