RaySafe ThinX RAD User Manual

RaySafe ThinX measures X-ray radiation. The instrument is always
on, triggered by radiation. You don’t need any correction tables,
since the active compensation feature automatically applies correc­tions for variation in beam filtration.

1

Position RaySafe ThinX with the sensor area
centered in the X-ray field.

BATTERY REPLACEMENT

When the yellow LED is blinking,
please replace the battery:

1. Remove the battery cover.

2. Replace the battery (CR2450).

3. Put the cover back. The instru­ment is ready to use.

CLEANING

Use a damp cloth for cleaning.

USER MANUAL

RaySafe ThinX RAD

2

Expose.

INSTRUMENT VERSIONS

This manual is valid for 1302024-A, 1302025-A and 1302026-A.

SUPPORT

Do not hesitate to contact Unfors RaySafe for support:

Technical support

[phone]

3

Read the values on the display.

If the detected waveform is pulsed, the num­ber of pulses will automatically be displayed.

[e-mail]

Service

[phone]
[e-mail]

© 2012.08 Unfors RaySafe 5000094-B

SPECIFICATIONS

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 %

Note! If any parameter is out of range, no measurement results will be shown.

1

KVP

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

Dose

kVp Number of pulses

Instrument model Dose kVp Dose rate HVL Time Pulses
RAD

RAD kVp

RAD Dose

Dose rate
HVL
Time

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

• Yellow Replace the battery. 100 exposures left.

• Red

Idle blink: The instrument is ready to use.
Intense blink: An exposure has been recorded..

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)
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

Instrument error Please write down the error code and contact support

Decrease the dose rate.

allowed.

(contact information on back side of this manual).