38
7.6. Environment
Table 7.4
Item Specification
Remark
Operation 0 ºC to 40 ºC
Temperature
Storage -10 ºC
to 50 ºC
Operation 30% to 80%RH
Humidity
Storage 30% to 90%RH
At 40 ºC, no condensation.
Malfunction at 5 KV
Electrostatic
Destruction at 10 KV
Conditions:
Equivalent human body resistance: 100
ohm
Equivalent human body capacity: 250 pF
Frequency of application: 10 times
Period of application: 0.3/0.3 seconds
7.7. Impact
Durability
Table 7.5
Item Specification
Remark
Shock-proof (in height)
30 cm or less
at 6 specified faces
Local impact
1 Kg
at specified position
Overall impact
20 Kg
Resistance to vibration
0.15 G
Conditions:
in X, Y, Z directions
10 and 55 Hz
30 minutes
7.8. Reliability
Table 7.6
Item Specification
MTBF 48,000
hours
Power switch
3,000 times
Terminal detection
switch
20,000 times
Switch
DIP switch
50 times
RS-232C 500
times
RS-422 500
times
Connection/removing of
the respective connectors
DC jack
500 times
Mounting and removing
terminal on/from cradle
DT-930 power
supply/charging
terminals
20,000 times
Installing and removing
battery pack in/from the
compartment
Charging spring
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.
