50
3.9 Instrument test and calibration
1. Check the leakage current of the device annually referring to the following data.
Test Items
Standard
Requirements
Continuous
leakage
current under normal
temperature (uA)
Leakage current to
Shell
Normal
≤100
Single Malfunction
≤500
Leakage current
to Patient
Normal
≤100
Single Malfunction
≤500
Dielectric
endurance
under
normal
temperature (V)
A- a
2
4000V/1min
No flashover
No breakdown
3. Test the software of obstetrics, area, and circumference measurement; please refer to
Appendix B for detailed data.
3.10 Maintenance of THIS EQUIPMENT Veterinary Ultrasound Scanner
Periodic maintenance on the ultrasound system is an effective means to reduce and avoid
failures, prolong its service life and keep it in good working order at every turn. Therefore,
maintenance on the Ultrasound equipment is a non-negligible key job for both operators and
engineers. This section will introduce basic items, methods and matters need attention during
maintenance.
Basic content of maintenance
(1) Periodically clear up dust, dirt and humidity inside and outside the equipment according
to operating ambient and sanitary conditions.
(2) Observe circuits closely to check if there is any abnormity or spoiled components,
analyze and remove the abnormal phenomena.
(3) Swab conducting contact parts and high-voltage insulation components surface of
connectors with detergent to ensure good electric contact of each connector and
prevent leakage of electricity through dirt on high-voltage component surface.
(4) Fasten each connector and setscrew to ensure good and stable electrical system contact.
(5) Check the detecting performance of the equipment and the control performance panel
of control keys, setup each performance control knob correctly and keep the whole set
in good working order.
Basic methods of maintenance
(1) Clean the inside and outside: first clean up the dust collected in the sagging parts of the
