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13
5) MAINTENANCE
WARNING
To avoid electrical shock, disconnect the meter from any circuit, remove the test leads
from the input jacks and turn OFF the meter before opening the case. Do not operate
with open case. Install only the same type of fuse or equivalent
Calibration
Periodic calibration at intervals of one year is recommended to maintain meter
accuracy. Accuracy is specified for a period of one year after calibration.
If self-diagnostic message "rE-O" is being displayed while powering on, the meter is
re-organizing internal parameters. Do not switch off the meter then, and it will be back
to normal measurement shortly. However, if self-diagnostic message "C_Er" is being
displayed while powering on, some meter ranges might be largely out of specifications.
To avoid mis-leading measurements, stop using the meter and send it for re-calibration.
Refer to the LIMITED WARRANTY section for obtaining warranty or repairing service.
Trouble Shooting
If the instrument fails to operate, check battery, fuses, leads, etc., and replace as
necessary. Double check operating procedure as described in this user's manual. If the
instrument voltage-resistance input terminal has subjected to high voltage transient
(caused by lightning or switching surge to the system) by accident or abnormal
conditions of operation, the series fusible resistors will be blown off (become high
impedance) like fuses to protect the user and the instrument. Most measuring functions
through this terminal will then be open circuit. The series fusible resistors and the spark
gaps should then be replaced by qualified technician. Refer to the LIMITED
WARRANTY section for obtaining warranty or repairing service.
Cleaning and Storage
Periodically wipe the case with a damp cloth and mild detergent; do not use abrasives
or solvents. If the meter is not to be used for periods of longer than 60 days, remove
the battery and store it separately.
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