31
directions, the diode junction is probably shorted. If the
display reads (
)
in both directions, the diode junction
is probably open. To protect sensitive devices, the open test
lead voltage from the meter will not exceed 3.0 V. Negative
inputs (from an external power source, for example) are not
suppressed.
6. MAINTENANCE
Repairs or servicing should only be performed by qualified
personnel.
– General Maintenance
Periodically wipe the case with a damp cloth and detergent;
do not use abrasives or solvents.
Water, dirt, or contamination in the A or mA
μ
A terminals
may cause bad effects on the meter. Clean and dry as
required.
– Calibration
Calibrate your meter once a year to ensure that it performs
according to its specifications. Contact the nearest Distribu-
tor for calibration procedure. For replacement parts, see
the parts list
(table 3, page 32 )
and
figure 5, page 46
at
the end of this manual.
WARNING
To avoid electircal shock, remove the test leads and
any input signals before replacing the battery or fuses.
To prevent damage or injury install only quick acting
fuses with the AMP/VOLT ratings shown in
figure 4,
page 48.
– Battery Replacement
The meter is powered by a single 9 V battery. Referring to
figure 4, page 46,
use the following procedure to replace
the battery:
1. Disconnect test leads from any live source, turn the meter
off, and remove the test leads from the front terminals.
2. The case bottom is secured to the case top by three
screws and two internal snaps (at the LCD end). Using a
screwdriver, remove the three screws from the case
bottom and turn the case over.
3. Lift the input terminal end of the case top until it gently
unsnaps from the case bottom at the end nearest the LCD.
4. Lift the battery from the case bottom, and carefully
disconnect the battery connector leads.
5. Snap the battery connector leads to the terminals of a
new battery and reinsert the battery into the case bottom.
6. Replace the case top, ensuring that the two snaps on the
case top (at the end near the LCD) are engaged.
Reinstall the three screws.
