Use and Care Manual

 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/ 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.
5-4. DC Voltage Measurement
DANGER
 Never 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/ 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/ 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. “ “ 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/ 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 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/ 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 measure-
ment 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 (DSA1010 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 ranges 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.
NCV Sensor can detect 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
while MIN/MAX Function is being activated.
(1) AC/DC Current Range(AC600A only on DSA660)
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, keys are disabled while ZERO Function is
being activated.
Zero Adjustment Function at Current Range “” 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.
A
node
Cathode
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
 To avoid electrical hazard, set the Function Switch
to “OFF” and remove the test leads from the
instrument before trying to replace batteries.
CAUTION
 Do not mix old and new batteries.
 Install batteries in correct polarity as indicated in
the Battery Compartment.
(1) 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.
(2) Set the Function Switch to “OFF” position.
(3) Unscrew and remove the Battery Compartment
Cover on the bottom of the instrument.
(4) Replace the batteries observing correct polarity.
Use new R03 (AAA) or LR03 / 1.5V batteries.
(5) Install the Battery Compartment and tighten the
screws.
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.
Lifetime Limited Warranty
The attention to detail of this fine snap-around instrument
is further enhanced by the application of A.W. Sperry's
unmatched service and concern for detail and reliability.
These A.W. Sperry snap - arounds are internationally
accepted by craftsmen and servicemen for their
unmatched performance. All A.W. Sperry's snap-around
instruments are unconditionally warranted against defects
in material and workmanship under normal conditions of
use and service; our obligation under this warranty being
limited to repairing or replacing free of charge, at A.W.
Sperry snap-around instrument that malfunctions under
normal operating conditions at rated use.1
Replacement procedure
Securely wrap the instrument and its accessories in a box
or mailing bag and ship prepaid to the address below.
Be sure to include your name and address, as well the
name of the distributor, with a copy of your invoice from
whom the unit was purchased, clearly identifying the
model number and date of purchase.
A.W.SPERRY INSTRUMENTS INC.
ATT: Customer service dept.
2150 Joshua's Path, Suit 302,
Hauppauge, N.Y. 11788
1 .The warranty is not applicable if the instrument has
been: misused, abused, subjected to loads in excess
of specifications, has had unauthorized repair or has
been improperly assembled or used.
*Note: Recommended calibration interval should not
exceed one year. Calibration service charges are not
covered terms and conditions of warranty.
05-11 92-1805