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4.6 Recommended Replacement Parts
The following parts are susceptible to wear. We recommend replacing them at the
following intervals. For part replacement, contact your nearest YOKOGAWA dealer.
Part Name
Recommended
Replacement Interval
Notes
Cooling fan
40000 hours
Lithium battery
3 years
If the instrument is turned off
ATTN module shutter 150000 times
AQ2200-311/311A/312/331/332 ATTN module
Part Name
Operating Life
Notes
LCD backlight
30000 hours
*
Half brightness life for continuous use
* This is the operating life if the display adjustment “Back Light” setting is set to 5 (the default
value).
4-34
IM 735101-01EN