Safety summary – Vanguard MCCB-250 User Manual
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MCCB-250 USER’S MANUAL
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SAFETY SUMMARY
FOLLOW EXACT OPERATING PROCEDURES
Any deviation from the procedures described in this User’s Manual may create one or more 
safety hazards, may damage the MCCB-250, or cause errors in the test results. Vanguard 
Instruments Company, Inc. assumes no liability for unsafe or improper use of the MCCB-250. 
All safety precautions provided in this manual must be observed during all phases of testing 
including test preparation, test lead connection, actual testing, and test lead disconnection. 
SAFETY WARNINGS AND CAUTIONS
Only trained operators shall use this device. All circuits under test shall be off-line and fully 
isolated. 
DO NOT MODIFY TEST EQUIPMENT
To avoid the risk of introducing additional or unknown hazards, do not install substitute parts or 
perform any unauthorized modification to any MCCB-250 test unit. To ensure that all designed 
safety features are maintained, it is highly recommended that repairs be performed only by 
Vanguard Instruments Company factory personnel or by an authorized repair service provider. 
Unauthorized modifications can cause safety hazards and will void the manufacturer’s 
warranty.