Model 77 Series IV
Calibration Information
2
Safety Information
Warning and Caution Statements
A XW Warning identifies hazardous conditions and actions that could cause bodily harm or death.
A W Caution identifies conditions and actions that could damage the Meter, the equipment under test, or
cause permanent loss of data.
XWWarnings and Precautions
To avoid possible electric shock or personal injury, and to avoid possible damage to the Meter
or to the equipment under test, adhere to the following practices:
• Use the Meter only as specified in this manual or the protection provided by the Meter might
be impaired.
• Do not use the Meter or test leads if they appear damaged, or if the Meter is not operating
properly. If in doubt, have the Meter serviced.
• Always use the proper terminals, switch position, and range for measurement.
• Verify the Meter's operation by measuring a known voltage.
• Do not apply more than the rated voltage, as marked on the Meter, between the terminals or
between any terminal and earth ground.
• Use caution with voltages above 30 V ac rms, 42 V ac peak, or 60 V dc. These voltages pose
a shock hazard.
• Disconnect circuit power and discharge all high-voltage capacitors before testing
resistance, continuity, diodes, or capacitance.
• Do not use the Meter around explosive gas or vapor.
• When using the test leads, keep your fingers behind the finger guards.
• Remove test leads from the Meter before opening the Meter case or battery door.
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