OPERATION
Before taking any measurements, read the Safety Infor-
mation Section. Always examine the instrument for dam-
age, contamination (excessive dirt, grease, etc.) and de-
fects. Examine the test leads for cracked or frayed insula-
tion. If any abnormal conditions exist do not attempt to
make any measurements.
Auto Power-down mode
If unused for about 30 minutes, the tester will power-
down automatically. Press RESET button to resume
power-on mode. If you should disable Auto Power-down
mode, press SELECT button when you turn on the meter.
SELECT Function Button (
Ω
Ω
Ω
Ω
Ω
/
)
The SELECT Function button is Yellow in color. Press
it to toggle to the alternate function ( Audible continuity and
Diode ) shown in Yellow on the meter face.
RESET Button
Press RESET button to reset or initialize system logic.
If you suspect that the meter is not operating properly or the
meter was power-down, you can always restart from the
beginning by press the RESET button.
RANGE Button
Press (RANGE) button to select the Manual Range mode
and turn off the "AUTO" annunciator.
In the Manual Range mode. Each time you press
(RANGE) button, the range (and the input range annuncia-
tor) increments, and a new value is displayed. To exit the
Manual Range mode and return to autoranging, press and
hold down (RANGE) button for 2 seconds. The "AUTO"
annunciator turns back on.
REL
∆∆∆∆∆
Button
Press (REL
∆
) to enter the Relative mode, zero the
display, and store the displayed reading as a reference
value. The relative mode annunciator (
∆
) is displayed.
Press (REL
∆
) again to exit the relative mode.
Data-Hold Button
Press this button briefly to activate DATA-HOLD mode.
The "
H
" annunciator is displayed.
Press this button again to exit the DATA-HOLD mode.
Voltage Measurements
1. Connect the red test lead to the "V
Ω
" jack and the black
test lead to the "COM" jack.
2. Set the Function/Range switch to the desired voltage
function.
3. Connect the test leads to the device or circuit being
measured.
4. For dc, a (-) sign is displayed for negative polarity;
positive polarity is implied.
Resistance Measurements
1. Set the Function/Range switch to
Ω
/
position.
2. Remove power from the equipment under test.
3. Connect the red test lead to the "V
Ω
" jack and the black
test lead to the "COM" jack.
4. Touch the probes to the test points. In ohms, the value
indicated in the display is the measured value of resistance.
WARNING
The accuracy of the functions might be slightly affected,
when exposed to a radiated electromagnetic field environ-
ment, e.g., radio, telephone or similar.
Diode Tests
1. Set the Function/Range switch to
Ω
/
position.
2. Remove power from the equipment under test.
3. To toggle the
Ω
/continity/diode modes, press SELECT
switch.
4. Touch probes to the diode. A forward-voltage drop is
about 0.6V (typical for a silicon diode).
5. Reverse probes. If the diode is good, 1 OL is displayed.
If the diode is shorted, ".000" or another number is
displayed.
6. If the diode is open, 1 OL is displayed, in both directions.
7. If the junction is measured in a circuit and a low reading
is obtained with both lead connections, the junction may
be shunted by a resistance of less than 1k
Ω.
In this case
the diode must be disconnected from the circuit for
accurate testing.
EMC
Errors are
≤
10% at field strengths below 1V/m and will
increase at higher field strengths.
GROUND
DOUBLE INSULATION
(Protection ClassII)
DC-DIRECT
CURRENT
AC-ALTERNATING
CURRENT
SEE EXPLANATION
IN MANUAL
DANGEROUS
VOLTAGE
International Electrical Symbols
MAINTENANCE
WARNING
Remove test leads before changing battery or fuse or
performing any servicing.
Battery Replacement
Power is supplied by a 9 volt "transistor" battery.
(NEDA 1604, IEC 6F22). The " " appears on the LCD
display when replacement is needed. To replace the bat-
tery, remove the two screws from the back of the meter and
lift off the battery case. Remove the battery from battery
contacts.
Servicing
Refer all service and repair to Robin Electronics. Do not
attempt servicing or repair yourself. Robin Electronics
recommend this instrument is calibrated at least once every
12 months. Contact Robin for a competitive quotation.
Cleaning
Periodically wipe the case with a damp cloth and
detergent, do not use abrasives or solvents.
Continuity Measurements
1. Set the Function/Range switch to
Ω
/
position.
2. Turn off power to the circuit under test. External voltage
across the components causes invalid readings.
3. To toggle between the
Ω
/continity/diode modes, press
SELECT button.
4. Connect the test leads to the two points at which
continuity is to be tested. The buzzer will sound if the
resistance is less than approximately 100
Ω.