24
®
Auto-Power-off (APO) :
The Auto-Power-off (APO)mode turns the
meter off automatically to extend battery life after approximately 20
minutes of no rotary switch or push button operations. To wake up
the meter from APO, press the
SELECT
, or turn the rotary switch
OFF and then back on. Always turn the rotary switch to the OFF
position when the meter is not in use.
Disabling Auto-Power-off :
Press the
SELECT
button while turning the meter on to temporarily
disable the Auto-Power-Off feature. Turn the rotary switch OFF and
then back on to resume.
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
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.
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 manual.
Set Beeper Off :
Press the
RANGE
button while turning the
meter on to temporarily disable the Beeper feature. Turn the rotary
switch OFF and then back on to resume.
®
25
Battery and Fuse replacement :
Loosen the screws from the access cover of the case bottom. Lift the
access cover. Replace the batteries or fuse. Re-fasten the screws.
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
input protection resistors may 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
input protection resistors and the spark-gaps (or varistors) should
then be replaced by qualified technician. Refer to the WARRANTY
section for obtaining warranty or repairing service.
Battery and Fuse replacement :
Battery use :
Four 1.5V AA battery (IEC LR6)
Fuses use :
Fuse (F2) for
INS.
/mA input :
0.4A/1000Vac & Vdc, IR 30kA or better, FF fuse;
Dimension :
6 x 32 mm
Fuse (F3) for Earth Continuity Test input :
0.25A/1000Vac & Vdc, IR 30kA or better, FF fuse;
Dimension :
6 x 32 mm
–
AA
+
AA
+
AA
+
F2
F3