Maintenance And Repair; Trouble Shooting - Amprobe AM-250 User Manual

MAINTENANCE AND REPAIR

If there appears to be a malfunction during the operation of the meter, the
following steps should be performed in order to isolate the cause of the
problem.
1.Check the battery. Replace the battery immediately when the
N
" " symbol appears on the LCD.
2.Review the operating instructions for possible mistakes in
operating procedure.
Except for the replacement of the battery, repair of the meter should be
performed only by a Factory Authorized Service Center or by other qualified
instrument service personnel. The front panel and case can be cleaned with
a mild solution of detergent and water. Apply sparingly with a soft cloth and
allow to dry completely before using. Do not use aromatic hydrocarbons or
chlorinated solvents for cleaning. If the meter is not to be used for periods of
longer than 60 days, remove the batteries and store them separately

Trouble Shooting

If the instrument fails to operate, check batteries and test 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.
Battery and Fuse replacement
Battery use:
Standard 1.5V AAA Size (NEDA 24G or IEC R03) battery X 2
Fuse (FS1) for µA and mA current input: 0.63A/500V, IR 150kA, F fuse (FA-
6x32/.63);
Fuse (FS2) for A current input: 12.5A/500V, IR 20kA, F fuse (FA-12.5A/500V);
13