Extech Instruments 381676A User Manual page 5

Test Lead Notes
The supplied black test leads (standard test lead and alligator clip probe) have protective plugs
that must be removed before being inserted in the bottom of the meter. This protective
apparatus must be removed from the end of the lead that plugs into the meter.
The positive (+) red probe cover is used when making Category III or higher measurements.
Twist to remove this probe cover when making Category II or lower measurements.
Maximum Input Limits
Measurements
Voltage DC or AC
Current DC or AC
Logic, Resistance, Continuity, and Diode
Automatic Power OFF (APO)
The meter is equipped with an automatic power off feature to preserve battery energy. After 14
minutes of inactivity the meter will emit 5 short beeps. After another minute the meter will emit
one long beep before finally turning off. To turn the meter on again, simply rotate the function
switch to the desired function.
To defeat the APO feature, press and hold the H button while turning the meter on. The APO
feature will re‐enable after the meter is turned off again.
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Input Limits
200mV range: 250V DC or AC rms
2~600V range: 600V DC or AC rms
Fuse protection (FF400mA/600V)
250V DC or AC rms
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