Urrea UD226, Руководство пользователя и гарантия

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E N G L I S H
36
27.
mS (Milliseconds, 1 x 10³ seconds)
Displayed when the mS-Pulse Width mode
is selected.
28. The following symbols indicate the unit
of the value displayed:
DWL The number of degrees of distributor
rotation when the points remain closed,
measured for 1 to 8 cylinders.
% Percent, used for duty cycle
measurement.
V Volts.
mV Millivolts (1 x 10¯³ Volts).
Ω Ohms.
KΩ Kilohm (1 x 10³ Ohms).
MΩ
Megohm (1 x 106 Ohms).
Hz Hertz (1 cycle/sec)
KHz Kilohertz (1 x 10³ cycle/sec)
29. RPM
Displayed when the RPM mode is selected.
In this mode, revolutions per minute on 2
or 4 stroke engines are measured using the
Inductive Pickup on a spark plug wire.
30. ANALOG DISPLAY SCALE
Displayed with 41 position analog pointers.
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 (Optional) Clamp-on Current Probe.
The Meter sometimes has to be used to
make a high current measurement. In
higher current applications where high
accuracy is not needed, a clamp-on current
probe is very useful.
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 Hall effect probe is
typically 1000 to 1, however the current is
converted to a voltage.
For example, 1 millivolt equals 1 amp dc
or ac so that 100 amps ac is converted to
100mV ac. The probe leads are connected
to the “V” and “COM” input terminals
and set the Meter function switch is set to
“mV” setting.
4. POWER-ON OPTIONS
The Meter has two power-on options.
• Disable Auto-Power-Off
Mode If the Meter is on and inactive for
approximately 30 minutes, this Meter will
automatically be turned off. To resume
operation, press the ON/OFF button.
To disable the Auto-Power-Off mode, turn
the Meter on by pressing the ON/ OFF
button while holding down the HOLD
button for more than 2 seconds.
• Continuous Turn-on of LCD Segments
Each time the Meter is powered on by
pressing the ON/OFF button, all LCD
segments will turn on for two seconds as
part of a selftest routine.
To turn all LCD segments on continuously,
turn the Meter on by pressing the ON/OFF
button while continuously pressing the
RANGE button.
5. BASIC ELECTRICAL TESTS AND
MEASUREMENTS
Voltage Measurements.