57
9.9. Reliability
Table 9.7
Item Specification
MTBF 70,000 hours
Power switch 3,000 times Switch
Terminal detection switch 20,000 times
Connecting/disconnecting
AC adaptor
DC jack 500 times
Mounting and removing
the terminal on/from
cradle
DT-930 power supply/charging
terminals
20,000 times
Installing and removing the battery pack in/from the
compartment
5,000 times
Notes:
• The above MTBF figure has been calculated based on each MTBF of the electronic parts
employed.
• The above figure does not apply to the AC adaptors.
9.10. Compliance
Table 9.8
Standard Remark
Radio interference EN55022:1994, A2:1997 Class B
CISPR Pub.22:1993, A2:1996 Class B
Tested with DT-9020ADP-G.
Electromagnetic
compatibility generic
immunity
EN50082-1: 1997 Tested with DT-9020ADP-G.
Safety EN60950 Applicable only to
DT-9020ADP-G and
DT-9020ADP-U