Dexcowin COCOON DX-7020, User Manual

Page: 51 / 61

(Model: DX-7020) User Manual 51
◆
Set up a calibrated Performance Meter (such as the Piranha554) according to the
manufacturer's specifications to detect and report the following: X-ray tube voltage,
exposure time, and dosage.
◆
Measurement Method: Final performance measurements are made using Piranha554.
The exposure time is measured from the moment radiation is detected until radiation is
no longer detected. This means a 90% cross setting is selected with no timer delays.
Linearity is calculated per IEC60601-2-7, 50.102.2a.
◆
Enable the DX-7020 and, with the collimator perpendicular to the test detector, check
exposures using the test detector. Compare results with the factory parameters
indicated in the chart below.
◆
For results outside these parameters, discontinue use and contact DEXCOWIN.
◆
This device should be calibrated once a year.
Acceptable ranges for the calibration
Test
description
Acceptance
limits
Exposure Time (ms)
50ms 100ms 300ms 500ms 1000ms
kVp
Accuracy
70kV
±
10% 64 ~ 77kV 64 ~ 77kV 64 ~ 77kV 64 ~ 77kV 64 ~ 77kV
Timer
Accuracy
Set point
±
10%
45 ~ 55ms
90~
110ms
270~
330ms
450 ~
550ms
900 ~
1100ms
Maintenance Log
Maintenance Test
Year 1 Year 2 Year 3 Year 4 Year 5 Year 6
Date
/Initial
Date
/Initial
Date
/Initial
Date
/Initial
Date
/Initial
Date
/Initial
1. Power button
2. Exposure sequence
3. Remote button
4. Dead-man button
5. Setting
6. DC adapter
7. Calibration