MS400 Datasheet, PDF (51/51 Pages) Extech Instruments Corporation. – Handheld Digital Storage Oscilloscope & Multimeter

Appendix B: Maintenance and Cleaning
Common Maintenance
Do not store or place the instrument in locations where the liquid crystal display (LCD)
may be exposed to direct sunlight for long periods of time.
In order to avoid damaging the instrument or the probe, do not expose to liquids or
solvent agents.
Cleaning:
Inspect the instrument and the probe frequently in accordance with the product’s
operating manual. Clean the outer surface of the instrument according to the following
steps:
1. Wipe off obvious dust on the outside of the instrument and on the probe with a soft,
clean cloth. When cleaning the LCD do not scuff the transparent LCD protective
screen.
2. Wipe the instrument clean while it is in its power off status. Use a soft cloth that is
moistened but not dripping wet. The instrument may be cleaned with mild detergent
and fresh water. To prevent damage to the instrument or to the probe do not use
abrasive chemicals, strong detergents or cleansers to clean the product.
Warning: Before powering and starting the product, please confirm that the
instrument has completely dried so as to avoid electrical short circuit and personal injury.
Storing the Oscilloscope
If the oscilloscope is to be stored for a long time, the lithium battery must be fully charged
before storage.
Charging the Oscilloscope
The lithium battery may not arrive fully charged when it is first received by the customer.
To properly charge the battery, it must be charged for 4 hours (the oscilloscope must be
turned off during charging). The battery can supply power for 4 hours after being charged
completely. When utilizing battery power, a battery charge indicator is displayed on the
top of the screen to show the battery’s remaining power level. The symbols that may
appear include , , and , where shows that the battery can only be used for about 5
minutes. To charge the battery and power the instrument, connect the oscilloscope using
a power adapter according to Figure 2 to charge the battery. The charging speed can be
increased by turning off the oscilloscope.
Notice: To avoid overheating the battery during charging, the environmental temperature
should not exceed the temperatures listed in the technical Specifications section.
Note: Once the battery is fully charged, the charger will automatically switch itself to a
slower charging rate, thus eliminating the need to turn off the charger at the time the
battery is fully charged.
Replacing the Lithium Battery Unit
It is usually not required to replace the battery unit. But when it is required to be replaced
only qualified personnel should carry out this operation and the battery should be
replaced with the same specified lithium battery.
51
MS400 Version 2.0 – December 2007