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Test Equipment(¹æ»ç¼±ÃøÁ¤±â)

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Dosimeter Dosimax plus A (basic unit) VD0201747, Detector RQA VD0202850
PTP-approved single-channel dosimeter according to IEC 61674, designed for acceptance tests and for quality checks at radiographic, fluoroscopic,dental and mammographic X-ray units.

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In Rad/Flu for use with solid state detector RQA.
Measurement Parameters with Detector RQA:
➤ Dose: 200 nGy - 9999 mGy
➤ Dose rate: 80 nGy/s - 70 mGy/s (50 - 150 kV)
➤ Time: 1 ms - 19999 s



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In Mammo for use with solid state detector RQM.
Measurement Parameters with Detector RQM:
➤ Dose: 500 nGy - 9999 mGy
➤ Dose rate: 1.5 ¥ìGy/s - 300 mGy/s
➤ Time: 1 ms - 19999 s



Options / Additional Accessories:
Official Verification CF1E1003 Of dosimeter DOSIMAX plus A by a German office of legal metrology.
Carrying Case VD0225720
For dosimeter DOSIMAX plus series;
offers space for 1 DOSIMAX plus and 2 solid state detectors (not DEDX/DE2DX).





Dosimeter DOSIMAX plus Duo incl. Sandwich Detector DE2DX VD0201460
Dual-channel dosimeter especially for constancy tests at radiographic and fluoroscopic X-ray units with sandwich detector DE2DX. Entrance and exit dose / dose rate measurement with one single exposure.
Measurement Parameters:
➤ Dose: 2 ¥ìGy - 9.999 Gy
➤ Dose rate (entrance dose): 20 ¥ìGy/s - 1 Gy/s
➤ Dose rate (exit dose): 2 ¥ìGy/s - 1 Gy/s
➤ Time: 1 ms - 20 ms
➤ kV-range combined with DE2DX: 50 - 150 kV



Dosimeter DOSIMAX plus I (basic unit) VD0201748
According to IEC 61674; single-channel dosimeter for constancy tests at radiographic and fluoroscopic X-ray units.
In Rad/Flu for use with the appropriate solid state detector (RQA or DEDX).
Measurement Parameters with Detector RQA:
➤ Dose: 200 nGy - 9999 mGy
➤ Dose rate: 80 nGy/s - 70 mGy/s (50 - 150 kV)
➤ Time: 1 ms - 19999 s
Measurement Parameters with Detector DEDX:
➤ Dose: 2 ¥ìGy - 9999 mGy
➤ Dose rate: 20 ¥ìGy/s - 1 Gy/s
➤ Time: 1 ms - 19999 s
Option / Additional Accessory:
Carrying Case VD0225720
For dosimeter DOSIMAX plus series;
offers space for 1 DOSIMAX plus and
2 solid state detectors (not DEDX/DE2DX).

Short description of the DOSIMAX plus A, DOSIMAX plus I
The DOSIMAX plus A dosimeter is a fully automatic precision instrument for measuring dose, dose rate and exposure time simultaneously. Semiconductor detectors are used which offer, in comparison to ionization chambers, a number of wellknown advantages e.g. they are unaffected by air pressure and temperature. The ionization current of the semiconductor detector is measured, converted into the dosimetrical unit Gray (Gy) and then shown in the display.

The DOSIMAX plus A, I has the following features:
     ¡¤ Automatic sensitivity changeover between radiography and fluoroscopy
     ¡¤ Automatic reset
     ¡¤ Easy parameter selection by using the corresponding key
     ¡¤ Direct readout of measured values
     ¡¤ Auto PowerOff after a period of 10 minutes when no user interaction or measuring takes place.
 
Intended Use
The DOSIMAX plus A, Dosimax plus I is intended for measuring in the being of use beam in the context of the acceptance test according to radiograph ordinance to radiograph diagnostics facilities.



Dose ¼±·®




Dose rate ¼±·®À²




Exposure Time

Technical Data
 
Basic instrument

Wave form:                              1pulse up to middle frequency / high frequency generators
Exposure time:                        1 ms to 19999 s
Reset:                                    automatically
Switching Off:                         automatically after 10 minutes of inactivity or by use of the Off key
Interface:                                RS 232
Power supply:                        4 Mignon batteries (AA) 1,5V each or alkaline (LR6)
Working time:                         15 hours (alkaline batteries)
Display:                                 LCDDOTMatrix, 5 Digits and units
Weight:                                  280 g / 0.44 lb (basic equipment without batteries)
                                            290 g / 0.64 lb (basic equipment with batteries)
Size (H x W x L):
Dosimeter:                             35 x 90 x 145 mm, (1.4¡¯ x 3.5¡¯ x 5.8¡¯)
Operating temperature:            15 to 35 ¡ÆC (59 to 95 ¡ÆF), Storage: 0 bis + 60 ¡ÆC (32 to140 ¡Æ F)
Relative air humidity:              < 80 %
 
Detector RQA
Type of detector:                       Silicon photodiode (PIN)
Measurement principle:             Ionization current in the semiconductor detector
Detector patch cord:                  Triaxial plug type Lemosa, size 0
Nominal measuring range for      50150 kV tube voltage in the unattenuated
diagnostic beam qualities:          useful beam (RQR 3 – RQR 10, acc. DIN EN61267)
                                               50150 kV tube voltage in the attenuated useful beam (RQA 3 RQA 10, acc. DIN EN 61267)
Calibration factor:                      0.0188 mGy/nC (70 kV, 2.5 mm Al)
                                               0.0174 mGy/nC (70 kV, 25 mm Al)
Response:                                53.2 nC/mGy (70 kV, 2.5 mm Al)
                                               57.5 nC/mGy (70 kV, 25 mm Al)
Dose measuring range:              200 nGy bis 9999 mGy
for the Dose rate range:              80 nGy/s bis 70 mGy/s
Measurement uncertainty:          < 5 % (by a minimal dose rate of 80 nGy/s)
Weight:                                     85 g (0.18 lb)
Size (L x W x H):                      45 x 20 x 8 mm (1.7¡¯ x 0.78¡¯ x 0.31¡¯)
Maximum cable length:             10 m (394¡¯)
Calibration reference point:        70 kV, 2.5 mm Al, 1 m distance (RQR5)
                                              70 kV, 25 mm Al, 1 m distance (RQA5)
 
 
Quality Assurance Tests
Even if a self check of the DOSIMAX plus A dosimeter detector combination is done after every switchon,
QA tests should be carried out at regular intervals in order to verify the general functionality, safety and general condition of the dosimeter, the detector(s) and all accessories. Please observe the environmental reference conditions stated below.
Suggested time table for QA tests

Type of test                                        Frequency                         Tolerance
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Calibration                                        Every 2 years                         +/- 5%
Dosimeter is free of damage               Before every
together with exposed cables /           messuring
detector(s)                                        session
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