Extech Instruments 381285 User Manual page 4

Safety
This meter has been designed to be safe in use, but the operator must use caution in its
operation. The rules listed below should be carefully followed for safe operation.
1. NEVER apply voltage or current to the meter that exceeds the specified maximum for the
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function selected.
Function
V DC
V AC
Ohms
mA DC/AC
20A DC/AC
Logic Analyzer
2. USE EXTREME CAUTION when working with high voltages.
3. DO NOT measure voltage if the voltage on the "COM" input jack exceeds 500V above
earth ground.
4. NEVER connect the meter leads across a voltage source while the function switch is in the
current, resistance or diode mode. Doing so can damage the meter.
5. ALWAYS discharge capacitors in power supplies and disconnect the power when making
resistance or diode tests.
6. ALWAYS turn off the power and disconnect the test leads before opening the back to
replace the fuse or batteries.
7. NEVER operate the meter unless the back cover is in place and fastened securely.
International Safety Symbols
This symbol, adjacent to another symbol or terminal, indicates the user must
refer to the manual for further information.
This symbol, adjacent to a terminal, indicates that, under normal use,
hazardous voltages may be present
Double insulation
The WARNING symbol indicates a potentially hazardous situation which, if not
WARNING
avoided, could result in serious injury or death
CAUTION The CAUTION symbol indicated a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury
Input Limits
Maximum Input
1000V DC within 10 seconds
700V AC within 10 seconds
250V DC/AC within 10 seconds
250V/500mA fused
250V/20A fused, 20A for 30 seconds max
each 15 minutes
50V p-p
4 V2.0 03/05