Multimètre numérique à commutation automatique de calibre, style sonde stylo
8
En cas de questions techniques, appellez le: 1-800-665-8685
8344749
V 1.0
PERFORMING A CONTINUITY TEST
1. Turn off the power to the circuit under test, and then discharge all capacitors and inductors.
2. Set the function switch to the
position.
3. Press the
button until
appears on the display.
4. Connect the test probe and the black test lead across the circuit being measured.
5. If the resistance of the circuit is less than 50Ω, the built-in buzzer will sound.
MEASURING LOGIC LEVEL (TTL)
1. Set the function switch to the position.
2. Connect the black test lead to the ground terminal of the circuit to be measured and the test probe to the
required test point of the circuit.
3. If the level of the test point is more than or equal to 2.3 ± 0.2V, the display will show “HI ” and the voltage
value. The meter will sound discontinuously.
4. If the level of the test point is less than or equal to 0.8 ± 0.2V, the display will show “LO ” and the voltage
value. The meter will sound continuously.
5. If the probes are open, the display will show a TTL logic levels approximate mid value (1.0 to 1.4V).
REPLACING THE BATTERY
CAUTION!
Before attempting to open the case of the instrument, be sure to disconnect the test lead and the test probe
from any energized circuits to avoid shock hazard.
When
appears on the display, the battery is low and should be replaced immediately. To replace the battery,
follow these steps:
1. Remove the screws from the battery cover, and then remove the battery cover.
2. Replace the old battery with new battery of the same type (9V).
3. Reinstall the battery cover and the screws.
REPLACING THE FUSES
CAUTION!
Before attempting to open the case of the instrument, be sure to disconnect test leads from any energized
circuits to avoid shock hazard.
The fuses will rarely need replacement and usually are blown as a result of an operator error. If the meter does not
work, you should replace the fuses. The meter uses a fuse with a specified rating of 250mA L 250V.
To replace the fuses, follow these steps:
1. Set the function switch to the OFF position.
2. Remove the battery door (
c
).
3. Remove part “
a
” by turning it.
4. Remove the screws on the back cover, and then remove the back
cover (
b
).
5. Remove the fuse by gently prying one end loose, then slide the
fuse out of its bracket.
6. Install a new fuse of the same rating.
7. Reinstall the back cover, battery door, part “
a
” and all the screws.
Note:
If the test lead is not placed in its correct position, the back cover can not be installed.
