Specifications - A.W. Sperry Instruments DSA-500 Operating Instructions

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.
• Do not exceed the maximum allowable input of any measure-
ment range.
• Never open the battery compartment cover when making
measurement.
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.
• Always switch off the instrument before opening the battery
compartment cover for battery replacement.
! CAUTION
• Make sure that the function selector switch is set to the
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.

3. Specifications

Measuring Ranges and Accuracy (at 23±5˚C, 45-75% relative
humidity)
AC Current (A)
Range Measuring Range
40A 0-39.99A
400A 0-399.9A
AC Voltage (V) Auto-ranging
Range Measuring Range
400V 0-399.9V
600V 150-599V
DC Voltage (V) Auto-ranging
Range Measuring Range
400V 0-399.9V
600V 150-599V
Resistance (Ω/Continuity) Auto-
ranging (Buzzer beeps below 50±35Ω)
Range Measuring Range
400Ω 0-399.9 Ω
4000Ω 150-3999 Ω
Accuracy
±2.0%rdg±6dgt
(50/60Hz)
Accuracy
±2.0%rdg±5dgt
(50/60Hz)
Accuracy
±1.5%rdg±5dgt
Accuracy
±2.0%±5dgt
• 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
• 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:
About 2.5 times per second
• Temperature and Humidity for Guaranteed
Accuracy:
o
23±5 C, relative humidity up to 85% without
condensation
• Operating Temperature and Humidity:
0~40˚C, relative humidity up to 85% without
condensation
• 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).
• Standards:
IEC61010-1
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 ranges: 720V AC/DC for 10sec
Resistance ranges: 300V AC/DC for 10sec
• Altitude up to 2000M:
Indoor use
• Withstand Voltage:
3700VAC (RMS,50/60Hz) for 1 minute between
electrical circuit and housing case
• Insulation Resistance
10MΩ or greater at 1000V between electrical
circuit and housing case
• Conductor Size:
Approx. 30mm diameter max