M
AVTMMTO3xx Rev 3 Sept 2013
56
WARNING
Before replacing the fuses, disconnect the
power input plug from the live power source.
To replace fuse(s), proceed as follows:
1. Disconnect the power cord from the MTO test set.
2. Using a small flathead screwdriver, carefully remove the fuse holder of
the input power module installed on the right side of the MTO test set
front panel.
3. Remove and properly dispose of blown fuse(s).
4. Install new fuse(s) making sure to use the type specified by the
manufacturer.
5. Reinstall the fuse holder in its receptacle in the input power module.
Connect the power cord to the MTO test set and to an energized power
source. If the electronic circuits still do not function properly, contact the
factory for service.
Calibration
A complete performance and calibration check should be made at least once
every year. This will ensure that the MTO test set is functioning and calibrated
properly over the entire measurement range. The MTO calibration is performed
on each new or repaired unit before sending it to a customer. There is a special
MTO final calibration procedure which requires a NIST-traceable test equipment
to be used. As a result of such calibration procedure, each MTO test set may be
NIST certified.
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