Hioki ST5540, Instruction Manual, Page: 286 / 326

11.2 Repair and Servicing
280
• Use the original packing materials when transporting the instrument, if possible.
• If the instrument has been subject to moisture, or if oil and dust have accumulated in the
instrument interior, the danger of electrical shock or fires resulting from the deterioration
of insulation increases greatly.
• When storing the instrument for a long time(1 year or more),the specifications are no
longer guaranteed. Therefore,before use,have the instrument recalibrated.
Replaceable Parts and Operating Lifetimes
Useful life depends on the operating environment and frequency of use. Operation cannot be
guaranteed beyond the following periods. For replacement parts, contact your dealer or Hioki repre-
sentative.
11.2 Repair and Servicing
Do not attempt to modify, disassemble or repair the instrument; as fire,
electric shock and injury could result.
• If damage is suspected, check the "Troubleshooting" section before
contacting your dealer or Hioki representative.
• Pack the instrument so that it will not sustain damage during shipping,
and include a description of existing damage. We do not take any
responsibility for damage incurred during shipping.
Part Life
LCD(to half brightness) Approx. 10,000 hours
Electrolytic Capacitors
Approx. 1,000 to 5,000 hours (105
°C(
221
°F)
)
Lithium Battery Approx. 10 years
The instrument uses a lithium battery for memory backup.
When this battery runs out, the data saved in memory is lost
and measurement condition data can no longer be saved. If this
happens, contact our service center for a battery replacement
(at a charge).
Relay for power switch Mechanical lifetime 2 million times
Electrical lifetime 200,000 times
Relay for signal switch Mechanical lifetime 100 million times
electrical lifetime 1 million times