A.W. Sperry Instruments DSA-2002P User manual

OPERATING
INSTRUCTIONS
11/05 FORM#275
MODELDSA-2002P
DIGISNAPTM
33/4DIGIT
DIGITALAC
SNAP-AROUND
VOLT-OHM-AMMETER
WITHPEAKHOLD

Contents
１．Safety Warnings ………………………………………………………１
２．Features ………………………………………………………………４
３．Specifications …………………………………………………………５
４．Instrument Layout ……………………………………………………７
５．Preparation for Measurement
５−１ Battery Voltage Check ………………………………………８
５−２ Checking Switch Setting and Operation ……………………８
６．Measurement
６−１ Current Measurement …………………………………………９
６−２ Voltage Measurement ………………………………………11
６−３ Resistance Measurement …………………………………… 12
７．Notes on Functions
７−１ Data Hold ………………………………………………………14
７−２ Sleep Function…………………………………………………14
７−３ Output for Recorder …………………………………………15
７−４ Mode Switching Function ……………………………………16
８．Battery Replacement …………………………………………………17

―1―
１．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 starting using the instrument.
WARNING
● Read through and understand instructions contained in this manual
before starting using the instrument.
● 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 manual.
● Be sure to understand and follow all safety instructions contained
in the manual.
Failure to follow the above instructions may cause injury, instrument
damage and/or damage to equipment under test.
○ The symbol indicated on the instrument means that the user
must refer to related parts in the manual for safe operation of the
instrument. Be sure to carefully read the instructions following
each symbol in this manual.
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.

―2―
Following symbols are used on the instrument and in the instruction
manual. Attention should be paid to each symbol to ensure your safety.
Refer to the instructions in the manual.
This symbol is marked where the user must refer to the
instruction manual so as not to cause personal injury or
instrument damage.
Indicates an instrument with double or reinforced insulation.
Indicates that this instrument can clamp on bare conductors
when measuring a voltage corresponding to the applicable
Measurement category, which is marked next to this symbol.
Indicates AC (Alternating Current).
Indicates DC (Direct Current).
Indicates AC and DC.
DANGER
●Never make measurement on a circuit above 750VAC or 1000VDC.
●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.
●Transformer jaw tips are designed not to short the circuit under
test. If equipment under test has exposed conductive parts,
however, extra precaution should be taken to minimize the
possibility of shorting.
●Never attempt to use the instrument if its surface or your hand is wet.
●Do not exceed the maximum allowable input of any measurement
range.
●Never open the battery compartment cover when making measurement.
●Never try to make measurement if any abnormal conditions, such
as broken Transformer jaws or case is noted.
●The instrument is to be used only in its intended applications or
conditions. Otherwise, safety functions equipped with the
instrument doesn,t work, and instrument damage or serious
personal injury may be caused.
WARNING
●Never attempt to make any measurement, if the instrument has any
structural abnormality such as cracked case and exposed metal part.
●Do not turn the function selector switch with test leads connected to
the instrument.
●Do not install substitute parts or make any modification to the
instrument. Return the instrument to your distributor for repair or re-
calibration.
●Do not try to replace the batteries if the surface of the instrument is wet.
●Always switch off the instrument before opening the battery
compartment cover for battery replacement.

―3―
CAUTION
●Make sure that the function selector switch is set to an appropriate
position before making measurement.
●Always make sure to insert the plug of each lead fully into the
appropriate terminal on the instrument.
●Be sure to set the function selector switch to the "OFF" position
after use. When the instrument will not be in use for a long period
of time, place it in storage after removing the batteries.
●Do not expose the instrument to the direct sun, extreme temperatures
or dew fall.
●Use a damp cloth and detergent for cleaning the instrument. Do
not use abrasives or solvents.
○ Measurement categories (Over-voltage categories)
To ensure safe operation of measuring instruments, IEC61010
establishes safety standards for various electrical environments,
categorized as CATⅠto CATⅣ, and called measurement
categories. Higher-numbered categories correspond to electrical
environments with greater momentary energy, so a measuring
instrument designed for CATⅢenvironments can endure greater
momentary energy than one designed for CATⅡ.
CAT Ⅰ: Secondary electrical circuits connected to an AC electrical
outlet through a transformer or similar device.
CAT Ⅱ: Primary electrical circuits of equipment connected to an
AC electrical outlet by a power cord.
CAT Ⅲ: Primary electrical circuits of the equipment connected
directly to the distribution panel, and feeders from the
distribution panel to outlets.
CAT Ⅳ:The circuit from the service drop to the service entrance,
and to the power meter and primary over-current
protection device (distribution panel).
Incoming wire
CAT.IV
Interior wiring
Transformer
CAT.I
CAT.II
CAT.III
S
ocket

―4―
●Tear-drop-shaped jaws for ease of use in crowded cable areas and
other tight places.
●Provides a wide measuring range from 0 up to 2000A.
●Terminal cover to avoid the use of an incorrect terminal.
●Measures current variation as short as 10 msec with peak-hold
feature.
●Provides output to a chart recorder for current variation recording.
●Designed to CAT.Ⅲ600VAC,DC / CAT.Ⅱ750VAC,1000VDC and
pollution degree 2 specified by the international safety standard IEC
61010-1.
●Data hold function to allow easy readings in dimly lit or hard-to-read
locations.
●Sleep feature to conserve battery power.
●Permits easy continuity check with a beeper.
●Provides a dynamic range of 4,000 counts full scale.
●Provides wide measuring range of voltage and resistance in auto-
ranging.
●Wide frequency range from 40Hz to 1kHz (Current measuring range:
0-1500A).
●Transformer jaws fitted with guard to further improve safety.
２．Features

―5―
● Measuring Ranges and Accuracy(at 23±5℃, relative humidity 45-75%)
AC Current
〜
400Ａ，
〜
2000Ａ
３．Specifications
Range
400Ａ
2000Ａ
Measuring Range
０〜400.0Ａ
０〜1000Ａ
1000〜1500Ａ
1500〜2000Ａ
Measuring Range
０〜40.00Ｖ
15.0〜400.0Ｖ
150〜750Ｖ
Measuring Range
０〜±40.00Ｖ
±15.0〜±400.0Ｖ
±150〜±1000Ｖ
Measuring Range
０〜400.0Ω
0.150〜4.000kΩ
1.50〜40.00kΩ
15.0〜400.0kΩ
Output Voltage / Measuring Range
０〜400.0ｍＶ /０〜400Ａ
０〜150.0ｍＶ /０〜1500Ａ
150.0〜200.0ｍＶ/1500〜2000Ａ
Resolution
0.1Ａ
１Ａ
Resolution
0.01Ｖ
0.1Ｖ
１Ｖ
Resolution
0.01Ｖ
0.1Ｖ
１Ｖ
Resolution
0.1Ω
１Ω
10Ω
100Ω
Accuracy（Frequency Range）
±1.0％rdg±3dgt(50/60Hz）
±2.0％rdg±3dgt(40〜１kHz)
±1.0％rdg±3dgt(50/60Hz）
±3.0％rdg±3dgt(40〜１kHz)
±3.0％rdg (50/60Hz）
Accuracy（Frequency Range）
±1.0％rdg±2dgt(50/60Hz）
±1.5％rdg±3dgt(40〜１kHz)
Accuracy
±1.0％rdg±2dgt
Accuracy
±1.5％rdg±2dgt
Accuracy（Frequency Range）
±1.5％rdg±0.5ｍＶ(50/60Hz）
±2.5％rdg±0.5ｍＶ(40〜１kHz）
±1.5％rdg±0.5ｍＶ(50/60Hz）
±3.5％rdg±0.5ｍＶ(40〜１kHz）
±3.5％rdg (50/60Hz）
Maximum Measurement Time
Continuous
15min
５min
Range
40Ｖ
400Ｖ
750Ｖ
Range
40Ｖ
400Ｖ
1000Ｖ
Range
400Ω
4kΩ
40kΩ
400kΩ
Range
400Ａ
2000Ａ
AC Voltage（
〜
Ｖ）Auto-ranging
Initially set to the 40V range. Input impedance is about 10MΩ.
DC Voltage（Ｖ）Auto-ranging
Initially set to the 40V range. Input impedance is about 10MΩ.
Resistance(Auto-ranging)
Initially set to the 400Ωrange. In the continuity check mode, fixed to the 400Ωrange and when the
reading is not more than 50±35Ω, the buzzer beeps.
ＯＵＴＰＵＴ（AC Current Ranges）
DC Output: 100.0mV per 1000 counts (Output impedance: about 10kΩ)
●
Electromagnetic compatibility（Radiated RF immunity & IEC 61000-4-3）
RF field strength
＝
＜
＝１Ｖ ／ ｍ,
total accuracy：specified accuracy
RF field strength
＝３Ｖ ／ ｍ,
total accuracy ：specified accuracy＋２％ of range

―6―
●Operating System Dual Integration
●Display Liquid crystal display with a maximum
count of 4000
●Low Battery Warning "BATT" symbol is displayed on the digital
display.
●Overrange Indication "OL" is displayed where input exceeds
the upper limit of a range
●Response Time Approx. 2 seconds
●Sleep function Automatically powered down in about 10
minutes after the last switch operation
●Data Hold Available in all ranges provided the peak
measurement mode is deactivated.
●Location for use Indoor use, Altitude up to 2000m
●Storage Temperature ー20〜60℃, relative humidity up to 85%
and Humidity without condensation
●Operating Temperature 0〜40℃, relative humidity up to 85%
and Humidity without condensation
●Conductor Size Approx. 54.5㎜diameter max.
●Overload Protection 2400A AC for 10sec
1200V AC/DC for 10sec
600V AC for 10sec
●Withstand Voltage 5550V AC for 1 minute between electrical
circuit and housing cases or metal parts
of jaws
●Insulation Resistance 10MΩor greater at 1000V between
electrical circuit and housing cases or
metal parts of jaws
●Safety Standard IEC 61010-1:Measurement CAT.Ⅲ
600VAC,DC / CAT.Ⅱ750VAC, 1000VDC,
pollution degree2.
●Dimensions 247（L）×105（W）×49（D）mm
●Weight Approx. 470g(battery included)
●Power Source Two R6P(DC1.5V) batteries or equivalent
●Current Consumption Approx. 5mA max. (Approx. 20μA in the
sleep mode)
●Accessories Test leads M-7107
Two R6P batteries
Instruction manual
Recorder Output Plug M-8201
Carrying case M-9094
●Optional Accessories Output Probe M-7014
Recorder M-5100A, etc.

―7―
４．InstrumentLayout
TransformerJaw
JawTrigger
Barrier
Display
ModeSwitch
ResetSwitch
DataHoldSwitch
TerminalCover DropPreventionStrap
Ｖ／Ω Terminal
COMTerminal
OUTPUTTerminal
︸
TestLeads
Ｍー7107
RecorderOutputPlug
Ｍー8102
DataHoldMode
Resistance
Voltage
Current
PeakModeMeasurementBatteryVoltageAlertContinuityCheckMode
NegativePotential
ACCurrent
DCCurrent
● ＬＣＤ INDICATOR
FunctionSwitch

―8―
５．PreparationforMeasurement
５−１ CheckingBatteryVoltage
①Set the function selector switch to any position other than "OFF".
②When the display is clear without "BATT" showing, proceed to
measurement.
③When the display blanks or "BATT" is indicated, replace the
batteries according to section 8: battery replacement.
NOTE
●It is possible that display is kept in blank while the function selector
switch is set to a position other than "OFF". This is due to sleep
function which automatically powers the instrument down in a
certain period of time after the last switch operation. To operate
the instrument in this case, set the switch back to the "OFF"
position, then to the desired position, or press any button.
５−２ CheckingSwitchSettingandOperation
Make sure that the function selector switch is set to the correct
position, the instrument is set to the correct mode and the data hold
function is deactivated. Otherwise, desired measurement cannot be
made. (See section 6 for measurement instructions and section 7 for
notes on functions.)

―9―
６．Measurement
６−１ CurrentMeasurement
WARNING
●Do not make measurement on a circuit above 750V AC. This may
cause shock hazard or damage to the instrument or equipment under
test.
● Transformer jaw tips are designed not to short the circuit under
test. If equipment under test has exposed conductive parts,
however, extra precaution should be taken to minimize the
possibility of shorting.
●Do not make measurement with the battery compartment cover
removed from the instrument.
●Do not make current measurement with the test leads connected to the
V/Ωand COMMON terminals.
●When measuring current is not less than 1000A, make sure to stop
measurement within the maximum measuring time shown below.
Otherwise, transformer jaws may heat to cause a fire or
deformation of molded parts, which will degrade insulation.
1000〜1500Ａ：15min. 1500〜2000Ａ：５min.
●Keep your fingers and hands behind the barrier during measurement.
６−１−１ ACCurrentMeasurement(NormalMode)
①Set the function selector switch to the "〜400A" or "〜2000A"
position and make sure that the current under test does not exceed
the upper limit of the measuring range you are selecting.
②Press the trigger to open the transformer jaws and clamp them onto
the conductor under test.

―10―
③Take the reading on the display.
NOTE
●During current measurement, keep the transformer jaws fully
closed. Otherwise, accurate measurement cannot be made. The
maximum measurable conductor size is 54.5mm in diameter.
●When measuring a larger current, the transformer jaws may buzz.
This is not a fault and does not affect the accuracy at all.
６−１−２ PeakCurrentMeasurement
①Set the function selector switch to the "〜400A" or "〜2000A" position.
②Press the mode button to select the peak mode. "PEAK" will be
shown on the display.
③Press the trigger to open the transformer jaws and clamp them onto
the conductor under test. Then, press the reset button.
④The display shows the current's crest value divided by the square
root of two. Therefore, when the current is sinusoidal, the reading
equals RMS value.
⑤To reset the display, press the reset button.
（Note: When this is done, the reading goes off for about one second.）
⑥After the measurement is over, press the mode button to return to
the normal mode.
NOTE
In the peak measurement mode, the data hold feature is disabled.
Ｖｐ
INPUTCurrent
Ｖｐ／
󰵫2
PeakHold

―11―
６−２ VoltageMeasurement
WARNING
● Do not make measurement on a circuit above 750V AC or 1000V
DC. This may cause shock hazard or damage to the instrument or
equipment under test.
●Do not make measurement with the battery compartment cover
removed.
●Keep your fingers and hands behind the barrier during measurement.
６−２−１ DCVoltageMeasurement
①Set the function selector switch to the " V" position.
②Slide the terminal cover to the left. Plug the red test lead into the V/Ω
terminal and the black test lead into the COM terminal.
③Connect the other end of the test leads to the circuit under test.
Take the reading on the display. When the red lead is the negative
potential, the "ー" sign is shown on the display.
６−２−２ ACVoltageMeasurement
①Set the function selector switch to the "〜V" position.
②Slide the terminal cover to the left. Plug the red test lead into the V/Ω
terminal and the black test lead into the COM terminal.
③Connect the other end of the test leads to the circuit under test. Take
the reading on the display.
NOTE
●For high sensitivity, there are parts which do not indicate "０".

―12―
６−３ ResistanceMeasurement
WARNING
●Before attempting to make measurement, make sure that the
circuit under test is not live. The instrument is protected against a
voltage up to 600V.
●Do not make measurement with the battery compartment cover
removed.
●Keep your fingers and hands behind the barrier during measurement.
６−３−１ ResistanceMeasurement(NormalMode)
①Set the function selector switch to the "Ω/ " position.
②Slide the terminal cover to the left. Plug the red test lead into the V/Ω
terminal and the black test lead into the COM terminal.
③Short the tip of the test leads and check whether the display reads "0".
④Connect the tip of the test leads to the circuit under test. Take the
reading on the display.
NOTE
●When shorting the tip of the test leads, the display may read a very
small resistance instead of "0." This is the resistance of the test
leads, not a fault.
● If one of the test leads is open, the display reads "OL".

―13―
６−３−２ ContinuityCheck
①Set the function selector switch to the "Ω/ " position.
②Slide the terminal cover to the left. Plug the red test lead into the V/Ω
terminal and the black test lead into the COM terminal.
③Press the mode button to set the instrument to the continuity check
mode. The measuring range is fixed to 400Ωand the " " symbol
is shown on the display.
④Short the tip of the test leads and make sure that the display reads
"0" and the buzzer beeps.
⑤Connect the tip of the test leads to the circuit under test. The
display reads the resistance and the buzzer beeps when the
reading is not more than about 50Ω.
NOTE
●When shorting the tip of the test leads, the display may read a very
small resistance instead of "0". This is the resistance of the test
leads, not a fault.
● If one of the test leads is open, the display reads "OL".

―14―
７−１ DataHold
This is a function used to freeze the measured value on the
display.
①Press the data hold button. The reading becomes frozen and the
"H" symbol is shown on the display, indicating the instrument in the
data hold mode.
②To exit the data hold mode, press the data hold button again to
release it.
NOTE
●When the function selector switch is turned while the instrument is
in the data hold mode, the data hold function remains activated.
To make measurement in this case, release the data hold button
by pressing it and exit the data hold mode.
●The data hold function is disabled in the peak measurement mode
on the AC current range.
●When the sleep function is activated, the data hold mode turns to
the normal mode.
７−２ SleepFunction
This is a function to prevent the instrument from being left powered
on in order to conserve battery life.
①The instrument automatically enters the sleep (powered-down)
mode about 10 minutes after the last switch operation.
②To exit the sleep mode, press the data hold, reset or mode button
or turn the function selector switch back to "OFF", then to any other
position.
［How to Exit the Sleep Mode ］
①Turn the function selector switch from "OFF" to another position with
the data hold button pressed. Then, "P.OFF" is shown on the
display. This disables the sleep function and enables continuous
use of the instrument.
７．NotesonFunctions

―15―
②To enable the sleep function, turn the function selector switch back
to "OFF", then to any other position.
NOTE
●The instrument consumes small amount of current in the sleep
mode. When the instrument is not in use, make sure to set the
function selector switch to "OFF".
７−３ RecorderOutput
Only on the "〜400A" or "〜2000A" range, DC voltage proportional
to the input current is output from the OUTPUT terminal.
①Set the function selector switch to the "〜400A" or "〜2000A"
position.
②Slide the terminal cover to the right and insert the recorder output
plug into the OUTPUT terminal for connection with a recorder or
other recording device.
NOTE
●Output voltage is 1mV/A on the "〜400A" range and 0.1mV/A on
the "〜2000A" range. Set an appropriate input sensitivity on the
recorder.
● The peak hold function does not apply to the recorder output even if
the instrument is in the peak hold mode.
●For long term measurement, disable the sleep function. (See
section 7◆-2 for sleep function.)

―16―
［Howtoattachapairofleadstotherecorderoutputplug］
Attach one end of the leads to the recorder output plug observing
correct polarity, then connect the other end to the recorder.
DANGER
Never apply voltage to the output terminal.
７−４ ModeSwitchingFunction
On a AC current ("〜400A" or "〜2000A") or the resistance(Ω/)
range, press the mode button to cycle through the measurement
modes. The instrument is initially set to the normal mode and can be
switched to the peak or continuity check mode by means of the mode
button. (See section 6-1-2 for peak current measurement and section
6-3-2◆for continuity check.)
Normal Peak
Peakcurrentvalueisdisplayed.
(Responsetime:10ms)
"PEAK"isshownonthedisplay.
Pressthemodebutton
Normal
ContinuityCheck
Thebuzzerbeepsiftheresistance
isnotmorethanabout50Ω.
Thebuzzersymbolisshownon
thedisplay.
≪ACCurrentRange(400Aor2000A)≫
≪ResistanceRange≫
Pressthemodebutton
Pressthemodebutton
Pressthemodebutton

―17―
WARNING
●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 batteries.
CAUTION
●Do not mix new and old batteries.
●Make sure to install batteries in correct polarity as indicated in the
battery compartment.
NOTE
●If the instrument is powered on, but the display blanks or "BATT" is
shown on the display, replace the batteries.
①Set the function selector switch to the "OFF" position.
② Unscrew and remove the battery compartment on the bottom of the
instrument.
③Replace the batteries observing correct polarity. Use two new R6P
batteries.
④Replace and screw the battery compartment cover.
８．BatteryReplacement
Screw
Battery
Battery
compartment
cover

―18―
ＭＥＭＯ