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2/04
OPERATING INSTRUCTIONS
MODEL DSA-540A
AC/DC DIGISNAP
SNAP-AROUND
Trigger
COM Terminal
A.W. SPERRY INSTRUMENTS INC.
The Professional's Choice
FORM #322
Transformer Jaws
Data Hold and
O AOJ Switch
Function
Selector
Switch
Display
V/Ω Terminal
®
1. FEATURES
• Safety design conforming to the following
provisions of IEC61010.
• Overvoltage category III 300V AC, pollution
degree 2.
• Overvoltage category II 600V AC/DC, pollution
degree 2.
• Protected throughout by double or reinforced
insulation, indicated the International Electrical
Symbol "
" on the bottom of the instrument.
• 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.
• Uses shrouded transformer jaws to further
improve safety.
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 manual before 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.
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Summary of Contents for Sperry instrument DSA-540A
- Page 1 FORM #322 1. FEATURES • Safety design conforming to the following provisions of IEC61010. OPERATING INSTRUCTIONS • Overvoltage category III 300V AC, pollution MODEL DSA-540A degree 2. • Overvoltage category II 600V AC/DC, pollution AC/DC DIGISNAP degree 2. SNAP-AROUND • Protected throughout by double or reinforced insulation, indicated the International Electrical Symbol “...
- Page 2 WARNING is reserved for conditions and • Be sure to set the function selector switch to actions that can cause serious or fatal injury. the “OFF” position after use. When the instru CAUTION is reserved for conditions and ment will not be in use for a long period of time, actions that can cause minor injury or place it in storage after removing the battery.
- Page 3 • Temperature and Humidity for Guranteed NOTE Accuracy: The sleep feature automatically turns the 23±5°C, relative humidity up to 85% without instrument off in a certain period of time after the condensation last switch operation. Therefore, the display may • Operating Temperature and Humidity: be blank with the function selector switch set to a 0~40°C, relative humidity up to 85% without position other than “OFF”.
- Page 4 instrument damage and/or damage to 7. RESISTANCE MEASUREMENT equipment under test. DANGER Fig. 3 Fig. 2 • 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 Incorrect Correct...
- Page 5 • Do not mix new and old batteries the date of purchase. • Make sure to install battery in correct polarity as indicated inside the battery compartment. A.W. SPERRY INSTRUMENT IN ATTN: Customer Service Dept. When “BAT” is shown on the display, replace 245 Marcus Boulevard the batteries.
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