KYORITSU 2055 - Manual (Page 2)

5-4. DC Voltage Measurement
DANGER
● N ever make measurement on a circuit in which
voltage over DC600V exists to avoid getting
electrical shock.
● Do not make measurement with the Battery
Cover removed.
● Keep your fingers behind the barrier on the
instrument during measurement.
(1) Set the Function Switch to " DCV " position.
(2) Connect the red test lead to V/ Ω terminal and the
black test lead to COM terminal.
(3) Connect the red and black test leads to the
positive (+)and negative (-) sides of the circuit
under test respectively. Take the reading on the
display. If the connection is reversed, the display
indicates the "-" mark.
5-5. Resistance/ Cont/ Diode Measurement
DANGER
● Never use the instrument on an energized circuit.
● Do not make measurement with the Battery
Cover removed.
Resistance
(1) Set the Function Switch to " Ω/ Cont/ Diode "
position.
(2) Connect the red test lead to V/ Ω terminal and the
black test lead to COM terminal. Confirm "OL" is
indicated on the display, and then short-circuit the
tips of test leads to make the indication zero.
(3) Connect the test leads to the both ends of the
resistor under test.
(4) Take the reading on the display.
CAUTION
● Even if short the test lead tips, indicated value
may not be zero. But this is because of the
resistance of test leads and not a failure.
● When test leads are open, "OL" is indicated on
the display.
Continuity
(1) Set the Function Switch to " Ω/ Cont/ Diode "
position. " Ω " has been selected by default; press
the SELECT key to change it to " Continuity " .
Resistance ⇨ Cont ⇨ Diode
(2) Connect the red test lead to V/ Ω terminal and the
black test lead to COM terminal. Confirm " OL " is
indicated on the display and short-circuit the tips
of test leads. Indication should become zero and
buzzer sounds.
(3) Connect the test leads to the both ends of the
conductor under test. The buzzer sounds, if the
resistance under test is 100
Ω or less.
Diode
(1) Set the Function Switch to " Ω/ Cont/ Diode "
position. " Ω " has been selected by default; press
the SELECT key to change it to " Diode "
Resistance ⇨ Cont ⇨ Diode
(2) Connect the red test lead to V/ Ω terminal and the
black test lead to COM terminal.
(3) Connect the red and black test leads to the Anode
and Cathode of the diode under test respectively.
Take the reading on the display. If the connection
is reversed, the display indicates "
OL " .
CAUTION
● Some of diodes cannot be tested. Indication on
the display will be "OL" .
(Zener diode, LED and
so on)
6. Other functions
6-1. Sleep Function
(1) This is a function to prevent the instrument from
being left powered on in order to conserve battery
life.
This function causes the instrument to enter
Sleep mode about 15 minutes after the last
key operation. To exit the Sleep mode, turn the
Function switch to "
OFF ", then to any other position,
or press any Key.
(2) Sleep Function is disabled when; MIN/MAX
Function is selected. Continuous measurement is
made with the Sleep Function being disabled. To
activate Sleep Function again, disable the MIN/
MAX Function.
CAUTION
● The instrument consumes small amount of
battery power in the Sleep mode. Set the
Function Switch to the OFF position after use.
6-2. HOLD Key
(1) Data Hold Function
This is a function to freeze the measured value
on the display. Press the "HOLD" key to freeze the
reading.
The reading will be held regardless of subsequent
variation in input. " H " is indicated on the upper left
corner of the display while the instrument is in the
Data Hold mode. To exit Data Hold mode, press the
"HOLD" key again.
CAUTION
● Held readings are released when Sleep
Function is activated while the instrument is in
the Data Hold mode.
(2) Backlight ON/OFF (KEW2055 only)
Pressing the HOLD key 2 sec or more lights up the
Backlight. Pressing the HOLD key 2 sec or more
again turns off the Backlight.
6-3. NCV Function
Red LED on the upper area on the Panel lights up
at all functions except for OFF when electric field
exceeding 100V is detected by the sensor installed in
the Jaws.
It indicates a presence of
voltage in an electrical circuit
or equipment without touching
them.
N C V S e n s o r c a n d e t e c t
electrical field only from the
direction indicated in the right
figure.
Put the fixed element (left
side) closer to the conductor
under test.
Detection against in-wall
outlet is impossible.
DANGER
● The LED may not light up due to installation
condition of electrical circuit or equipment.
Never touch the circuit under test to avoid
possible danger even if the LED for NCV
doesn ’ t light up.
● Check the functionality of LED on a well-known
power supply prior to measurement. When the
LED doesn ’ t light up, do not make measurement.
● NCV indication is affected by external voltage,
how to hold or place the instrument.
6-4. MIN/MAX Function
CAUTION
● SELECT, ZERO, Hz/DUTY keys are disabled
whileMIN/MAX Function is being activated.
(1) AC/DC Current Range (AC600A only on KEW2040)
Pressing the MIN/MAX Key at 600A & 1000A
Function enables min or max value measurement.
Press the MIN/MAX Key to select MAX or MIN. The
max or min value within measuring range is being
held until this function is disabled. "MIN" or "MAX"
is indicated on the display while this function is
being activated. To disable this function, press
down the MIN/MAX Key at least 2 sec or change
functions.
(2) AC/DC Voltage Range
CAUTION
● Pressing the MIN/MAX Key without applying
voltage disables the Auto-ranging function and
fixes the Range to 6V. Connect the test leads
to the circuit under test and press the MIN/MAX
Key after an appropriate range is selected by
Auto-ranging function.
Pressing the MIN/MAX Key enables min or max value
measurement. Press the MIN/MAX Key to select MAX
or MIN. The max or min value within measuring range
is being held until this function is disabled. "MIN" or
"MAX" is indicated on the display while this function is
being activated.
To disable this function, press down the MIN/MAX Key
at least 2 sec or change functions.
6-5. ZERO Function
CAUTION
● MIN/MAX, PEAK keys are disabled while ZERO
Function is being activated.
Zero Adjustment Function at Current Range " Δ " mark
is to be indicated at the upper right on the display while
ZERO function is being operated. Indication of relative
value at Current, Voltage, Resistance: Pressing the
ZERO Key indicates REL (relative value) Press the
ZERO Key to save the initial value at the start of
measurement as a reference value. Then the difference
between the later measured values and the reference
value is indicated on the display.
The Auto-ranging function is disabled, while this
function is being activated, and the Range is fixed to
the Range selected at the start of measurement.
Relative value is indicated within following ranges.
（ Measuring range ）
=(Full-scale value at the fixed Range) ‒ (Initial value)
To disable this function, press down the MIN/MAX Key
at least 2 sec or change functions.
6-6. Over-flow indication
When the input exceeds the measuring range at each
Function other than Voltage and 1000A Range, "OL" or
"-OL" is indicated on the display.
7. Battery Replacement
WARNING
● MIN/MAX, PEAK keys are disabled while ZERO
Function is being activated.
CAUTION
● Do not mix old and new batteries.
● Install batteries in correct polarity as indicated
in the Battery Compartment.
Replace the batteries when a Low Battery
Voltage warning "BATT" mark is indicated on the
display. Note that when the battery is completely
exhausted, the display blanks without " BATT " mark
shown.
(1) Set the Function Switch to "OFF" position.
(2) Unscrew and remove the Battery Compartment
Cover on the bottom of the instrument.
(3) Replace the batteries observing correct polarity.
Use new R03 (AAA) or LR03 / 1.5V batteries.
(4) Install the Battery Compartment and tighten the
screws.
display.
(2) With the transformer jaws closed and without
clamping them onto the conductor, press the
" ZERO " key to zero adjust the display. (mark is
displayed at the upper right on the display.)
(3) Press the trigger to open the transformer jaws and
clamp them onto the one conductor under test, the
conductor should be at the center of the jaws, then
take the reading on the display.
(4) Set the Function Switch to an appropriate position
according to current under test.
(5) Pressing the " ZERO " key again releases " ZERO "
function. (mark at the upper right on the display
disappears.)
CAUTION
● When the current flows from the upside (the
display side) to the underside of the instrument,
the polarity of the reading is positive and vice
versa.
5-3. AC Voltage Measurement
DANGER
● Never make measurement on a circuit in which
voltage over AC600V exists to avoid getting
electrical shock.
● Do not make measurement with the Battery
Cover removed.
● Keep your fingers behind the barrier on the
instrument during measurement.
(1) Set the Function Switch to " ACV " position.
(2) Connect the red test lead to V/ Ω terminal and the
black test lead to COM terminal.
(3) Connect the test leads to the circuit under test.
Take the reading on the display. Pressing the
" Hz/DUTY " key while reading is indicated on
the display switches the indication in following
sequence.
AC Voltage ⇨ Hz ⇨ DUTY
CAUTION
● Hz/DUTY Function requires AC40V or higher.
● To measure a frequency, measure the voltage
on the electrical circuit in advance.
● Then press the Hz/DUTY key to enter into
frequency measurement.
● Readings of frequency may fluctuate or be
influenced under noisy environment.
Anode Cathode
92-1801A 06-02
8. Maintenance
● Cleaning
Use a cloth dipped in water or neutral detergent for
cleaning the instrument.
Do not use abrasives or solvents. Otherwise, instrument
get damaged, deformed or discolored.