9
4) 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 battery
cover. Do not operate with the case open. 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 “
C_Er
” is being displayed while powering on, some meter
ranges might be out of specification. To avoid misleading measurements, stop
using the meter and send it for re-calibration. Refer to the LIMITED
WARRANTY section for obtaining warranty or repair 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 is subjected to a high
voltage transient (caused by lightning or switching surge to the system) by
accident or abnormal conditions of operation, the series fusible resistors will
blow (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 only be replaced
by ACT Meters Ltd. Refer to the LIMITED WARRANTY section for obtaining
warranty or repair service, or call +44 (0) 1744 88 6660.
Battery and Fuse
replacement:
Battery:
1.5V AAA Size
alkaline battery (x2)
Fuses:
Fuse (F1) for
A/mA current
input: 0.4A/1000V AC &
DC, IR 30kA, F fuse;
Dimension: 6 x 32 mm
Fuse (F2) for A current input:
11A/1000V AC & DC, IR 20kA,
F fuse; Dimension: 10 x 38mm
Loosen the screw from the
access cover of the case
bottom. Lift off the access
cover. Replace the batteries or
fuse(s). Replace access cover
and fasten the screw.
