Basic Electrical Tests And Measurements; Voltage Measurements - Urrea UD88 Manual De Usuario Y Garantía

E N G L I S H
The standard D9 male connector of the RS-232C
serial cable (UD50RS) is plugged into this terminal
when interfacing to a PC. The RS-232C serial cable is
optional.
Auto Power-Off Mode
If this Meter is on and inactive for approximately 30
minutes (1 hour in the Recording mode), this Meter
will automatically switch to Auto Power- Off Mode. To
resume operation, turn the rotary switch back to the
OFF position and then turn Meter ON again. To disable
the Auto-Power-Off Mode, turn the rotary switch OFF
to any function (ON) position while holding down the
HOLD button.
Using Test Leads
Use only the same type of test leads as are supplied
with the Meter. These test leads are rated for 1200
Volts. Although these test leads are rated for 1200
Volts, do not try to measure any voltage greater than
1000 Volts DC or 750 Volts AC.
NOTE: In some DC and AC voltage ranges with test leads not
connected to any circuit, the display may show fluctuating
readings due to the high input impedance. This is normal.
When you connect the test leads to a circuit, a real
measurement appears.
Using Inductive Pickup
The Meter comes with an Inductive Pickup. The
Inductive Pickup takes the magnetic field generated
by the current in the spark plug wire and converts it to
a pulse that triggers the Meter's RPM measurement.
Using Holster and Stand
The Meter comes with a protective holster that
absorbs shocks and protects the Meter from rough
handling. The holster is equipped with a stand rest.
Using (Optional) Clamp-on Current Probe
The Meter sometimes has to be used to make a
current measurement that exceeds the rating of it.
In these higher current applications (over 10A) where
high accuracy is not needed, a clamp-on current
probe is very useful. A current probe clamps around
the conductor carrying in the current and converts the
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measured value to a level the Meter can handle.
There are two basic types of current probes: Current
transformers (CT), which measure AC current only
and Hall-Effect probes, which can measure AC or DC
current.
The output of a current transformer type clamp-on is
typically a 1000 to 1 or 1 milliAmp per 1 Amp. A 100
Amp value is reduced to 100 milliAmps, which can be
safely measured by most DMMs.
The current probe leads are connected to the "mA"
and "COM" input jacks and the Meter function switch
is set to mA or Amps AC.
The output of a Hall-Effect probe is also typically 1000
to 1, however the current is converted to a voltage.
For example, 1 milliVolt equals 1 Amp (AC or DC) so
that 100 Amps AC is converted to 100mV AC. The
probe leads are connected to the "V" and "COM"
input jacks and the Meter function switch is set to the
"V" or "mV" setting, selecting V AC for AC current or
V DC for DC current measurements.
4. BASIC ELECTRICAL TESTS AND
MEASUREMENTS
One of the most common electronic diagnostic tool is
a DMM. A DMM is simply an electronic yardstick for
making electrical measurements.
DMMs have many special functions and features,
but it is most used for measuring Volts, Amperes
and Resistances. An automotive multimeter like this
Meter can also measure frequency, RPM, DUTY-CYCLE,
DWELL, PULSE-WIDTH, temperature, capacitance and
even diodes.
WARNING: TO AVOID THE RISK OF ELECTRICAL SHOCK
AND INSTRUMENT DAMAGE, INPUT VOLTAGES MUST NOT
EXCEED 1000V DC OR 750V AC RMS. DO NOT ATTEMPT TO
TAKE ANY UNKNOWN VOLTAGE MEASUREMENT GREATER
1000V DC OR 750V AC RMS.
NOTE: When taking voltage measurements, this Meter
must be connected in PARALLEL with the circuit, or circuit
element under test.

Voltage Measurements