3/01
FORM #310
1. Features
• Safety design conforming to the following
provisions of IEC61010.
• Overvoltage category III 300V, pollution degree 2,
• Overvoltage category II 600V, pollution degree 2,
• Data hold switch for easy reading in dimly light or
hard-to-read locations.
• “Sleep” .feature to extend battery life.
• Beeper permits easy continuity check.
• Provides a dynamic range of 4,000 counts
full scale.
OPERATING INSTRUCTIONS
MODEL DSA-500
DIGISNAP
SNAP-AROUND
• Uses shrouded transformer jaws to further
improve safety.
Transformer Jaws
2. Safety Warnings
• This instrument has been designed and tested
according to IEC Publication 61010: Safety
Requirements for Electronic Measuring
Apparatus. This instruction manual contains
warnings and safety rules which must be
observed by the user to ensure safe operation
of the instrument and retain it in safe condition.
Therefore, read through these operating
instructions before using the instrument.
!
WARNING
• Read through and understand instructions contained in this
Data Hold
Switch
manual before using the instrument.
Trigger
• Save and keep the manual handy to enable quick reference
whenever necessary.
• Be sure to use the instrument only in its intended applications
and to follow measurement procedures described in the manu-
al.
Function
Selector
Switch
• Be sure to understand and follow all safety instructions con-
tained in the manual.
• Failure to follow the above instructions may cause injury,
instrument damage and/or damage to equipment under test.
Display
!
The symbol indicated on the instrument means
that the user must refer to related parts in the man-
ual for safe operation of the instrument. Be sure to
carefully read the instructions following each symbol
in this manual.
COM Terminal
V/Ω Terminal
!
DANGER is reserved for conditions and actions that are likely
to cause serious or fatal injury.
WARNING is reserved for conditions and actions that can
!
cause serious or fatal injury.
!
CAUTION is reserved for conditions and actions that can
cause minor injury or instrument damage.
!
DANGER
• Never make measurement on a circuit with a voltage higher
than 600 VAC/DC.
A.W. SPERRY INSTRUMENTS INC.
• Do not attempt to make measurement in the presence of
flammable gasses, fumes, vapor or dust. Otherwise, the use
of the instrument may cause sparking, which can lead to
an explosion.
®
The Professional’s Choice
• Transformer jaws are made of metal and their tips are not
insulated. Where equipment under test has exposed
conductive parts, be especially careful to avoid the hazard of
possible shorting.
• Never attempt to use the instrument if its surface or your
hand is wet.
• EMC (IEC61000-4-3):
RF electromagnetic field<1V/m;
total accuracy=specified accuracy
RF electromagnetic field=3V/m;
total accuracy=specified accuracy
+2% of range
• Do not exceed the maximum allowable input of any measure-
ment range.
• Never open the battery compartment cover when making
measurement.
• Operating System:
Dual Integration
• Display:
Liquid crystal display (maximum count: 3999)
• Low Battery Warning:
“BAT” is shown on the display
• Overrange Indication:
“OL” is shown on the display
• Response Time:
Approx. 2 seconds
• Sample Rate:
!
WARNING
• Never attempt to make any measurement if any abnormal
conditions are noted, such as broken case, cracked test leads
and exposed metal part.
Do not turn the function selector switch with plugged in test
leads connected to the circuit under test.
• Do not install substitute parts or make any modification to the
instrument. Return the instrument to your distributor for repair
or recalibration.
• Do not try to replace the batteries if the surface of the
instrument is wet.
•
About 2.5 times per second
• Temperature and Humidity for Guaranteed
Accuracy:
•
Always switch off the instrument before opening the battery
compartment cover for battery replacement.
23±5oC, relative humidity up to 85% without
condensation
!
CAUTION
Make sure that the function selector switch is set to the
•
•
Operating Temperature and Humidity:
0~40 C, relative humidity up to 85% without
condensation
appropriate position before making measurement.
˚
• Always make sure to insert each plug of the test leads fully
into the appropriate terminal on the instrument.
• Make sure to remove the test leads from the instrument before
making current measurement.
• Do not expose the instrument to the direct sun, extreme
temperatures or dew fall.
• Be sure to set the function selector switch to the “OFF” posi-
tion after use. When theinstrument will not be in use for a long
period of time, place it in storage after removing the battery.
• Use a damp cloth and detergent for cleaning the instrument.
Do not use abrasives or solvents.
• Storage Temperature and Humidity:
-20~60 C, relative humidity up to 85% without
condensation
˚
• Power Source:
Two R03 or equivalent (DC1.5V) batteries
• Current Consumption:
Approx. 2.5mA max.
• Sleep Function:
Automatically powered down in about 10
minutes after the last switch operation (power
consumption in the sleep mode is about 20μA).
3. Specifications
Measuring Ranges and Accuracy (at 23±5˚C, 45-75% relative
humidity)
• Standards:
IEC61010-1
AC Current (A)
Range
40A
400A
Measuring Range
0-39.99A
0-399.9A
Accuracy
±2.0%rdg±6dgt
(50/60Hz)
CAT.III 300V, pollution degree 2
CAT.II 600V, pollution degree 2
IEC61010-2-031
IEC61010-2-032
• Overload Protection:
AC current ranges: 480A AC/DC for 10sec
AC Voltage (V) Auto-ranging
Range
400V
600V
Measuring Range
0-399.9V
150-599V
Accuracy
±2.0%rdg±5dgt
(50/60Hz)
AC voltage ranges: 720V AC/DC for 10sec
Resistance ranges: 300V AC/DC for 10sec
• Altitude up to 2000M:
DC Voltage (V) Auto-ranging
Range
400V
600V
Measuring Range
0-399.9V
150-599V
Accuracy
Indoor use
±1.5%rdg±5dgt
• Withstand Voltage:
3700VAC (RMS,50/60Hz) for 1 minute between
electrical circuit and housing case
Resistance (Ω/Continuity) Auto-
ranging (Buzzer beeps below 50±35Ω)
Range
400Ω
4000Ω
Measuring Range
0-399.9 Ω
150-3999 Ω
Accuracy
• Insulation Resistance
10MΩ or greater at 1000V between electrical
circuit and housing case
• Conductor Size:
Approx. 30mm diameter max
±2.0%±5dgt
NOTE
• Dimensions:
184(L) x 44(W) x 27(D)mm
• During current measurement, keep the transformer jaws fully
closed. Otherwise, accurate measurement cannot be made.
The maxi-mum conductor size is 30 mm in diameter.
• When measuring a larger current, the transformer jaws may
buzz. This does not affect the instrument's accuracy.
• Weight:
Approx. 190g (including batteries)
• Accessories:
Test leads
Two R03 AAA batteries
Instruction manual
5-2 AC Voltage Measurement
!
DANGER
4. Preparation for Measurement
4-1 Checking Battery Voltage
• Never use the instrument on a circuit with a voltage higher
than 600 VAC. Otherwise,electric shock hazard or damage to
the instrument or the circuit under test may result.
• Do not make measurement with the battery compartment
cover removed.
Set the function selector switch to any position
other than “OFF”. When the display is clear without
“BAT” showing, proceed to measurement. When
the display blanks or “BAT” is indicated, replaces
the batteries according to the instructions described
in section 7 (Battery Replacemen)t.
˜
1. Set the function selector switch to the “600V”
position.
2. Plug the red test lead into the V/Ω terminal and
the black test lead into the COM terminal.
3. Connect the test lead prods to the circuit under
test and take the reading on the display.
5-3 DC Voltage Measurement
NOTE
The sleep feature automatically turns the instrument off in a cer-
tain period of time after the last switch operation. Therefore, the
display may be blank with the function selector switch set to a
position other than “OFF”. To operate the instrument in this case,
set the switch back to the “OFF” position, then to the desired
position, or press any switch. If the display still blanks, the
batteries are exhausted. Replace the batteries.
!
DANGER
• Never use the instrument on a circuit with a voltage higher
than 600VDC. Otherwise,
• electric shock hazard or damage to the instrument or the cir-
cuit under test may result.
• Do not make measurement with the battery compartment
cover removed.
4-2 Checking Switch Setting and Operation
Make sure that the function selector switch is set
to the correct position and the data hold switch is
deactivated. Otherwise, desired measurement
cannot be made.
1. Set the function selector switch to the “
position.
”
5.Measurement
5-1 AC Current Measurement
2. Plug the red test lead into the V/Ω terminal and
the black test lead into the COM terminal.
3. Connect the test lead prods to the circuit under
test and take the reading on the display.
5-4 Resistance Measurement
!
WARNING
• Do not make measurement on a circuit with a voltage higher
than 600 VAC. Otherwise, shock hazard or damage to the
instrument or equipment under test may result.
• Transformer jaw tips are designed to minimize the possibility
of shorting conductors in the circuit under test. If equipment
under test has exposed conductive parts, however, extra
precaution should be taken to avoid possible shorting.
• Do not make measurement with the battery compartment
cover removed.
!
DANGER
• Always make sure that the circuit under test is powered off.
• Do not make measurement with the battery compartment
cover removed.
1. Set the function selector switch to the “Ω/ )))”
•
position.
• Do not make current measurement with the test leads
connected to the instrument.
2. Plug the red test lead into the V/Ω terminal and
the black te st lead into the COM terminal.
3. Check that the display reads OL with the test
lead prods shorted together, also check that the
buzzer beeps and the display reads 0.
4. Connect the test lead prods to the circuit under
test and take the reading on the display. The
buzzer beeps the reading is below 50±35 Ω.
1. Set the function selector switch to the “40Ô or
“400Ô position.
2. Press the trigger to open the transformer jaws
and clamp onto one conductor only.
3. Take the reading on the display.
Fig. 3
Fig. 2
NOTE
• When shorting the test lead prods together, the display
may show a very small resistance instead of “0”. This is the
resistance of the test leads.
• If one of the test leads has an open, the display reads “OL”.
Incorrect
Correct
CAUTION
Do not mix new and old batteries
Make sure to install battery in correct polarity as indicated inside
the battery compartment.
6. Other Functions
6-1 Sleep Function
NOTE
The instrument still consumes small amount of battery power in
the sleep mode. Make sure to set the function selector switch to
the “OFF” position after use.
When “BAT” is shown on the display, replace the
batteries. Note that when the battery is completely
exhausted, the display blanks without “BAT” shown.
(1) Sleep Mode
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 automati-
cally enter the sleep (powered down) mode about
10 minutes after the last switch or button operation.
To exit the sleep mode, turn the function selector
switch back to “OFF”, then to any other position, or
press any button.
1 Set the function selector switch to the “OFF”
position.
2 Unscrew and remove the battery compartment on
the bottom of the instrument.
3 Replace the batteries observing correct polarity.
Use two new R03 or equivalentbatteries.
4 Mount and screw the battery compartment cover.
(2) How to disable the sleep mode
To disable the sleep mode, Power the instrument on
with the data hold switch pressed. “P.OFF” is shown
on the display for about 3 seconds after
the instrument is powered on.
To enable the sleep mode, power the instrument off,
then power it on without pressing the data hold
switch.
6-2 Data Hold Function
Battery Compartment
This is a function used to freeze the measured
value on the display. Press the data hold switch
to freeze the reading. The reading will be held
regardless of subsequent changes in input ‘H’ is
shown on the upper left corner of the display while
the instrument is in the data hold mode.
To exit the data hold mode, press the data hold
switch again.
2XRo3 or 1.5V AAA
NOTE
If the instrument in the data hold mode enters the sleep mode,
the data hold mode will be cancelled.
7. Battery Replacement
To avoid electric shock hazard, make sure to set the
function selector switch to “OFF” and remove the
test leads from the instrument before trying to
replace the batteries.
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’s 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 materi-
al and workmanship under normal conditions of
use and service; our obligations under this warranty
being limited to repairing or replacing, free of
charge, at A.W. Sperry’s sole option, any such
A.W. Sperry snap-around instrument that malfunc-
tions 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 as the name of the distributor, with
a copy of your invoice from whom the unit was pur-
chased, clearly identifying the model number and
the date of purchase.
A.W. SPERRY INSTRUMENT INC.
ATTN: Customer Service Dept.
245 Marcus Boulevard
Hauppauge, N.Y. 11788-2075
1. 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 under terms and conditions of warranty.
245 Marcus Blvd., Hauppauge, NY 11788
1-800-645-5398 or 631-231-7050
Fax: 631-434-3128
E Mail: [email protected]
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