Safety Earth Ground - HP 70427A User Manual

Safety Earth
Ground
Before Applying Power
1SM1-A This text indicates that the instrument is an Industrial Scientific and
Medical Group 1 Class A product (CISPER 11, Clause 4).
This symbol indicates that the power line switch is ON.
This symbol indicates that the power line switch is OFF or in
STANDBY position.
This is a Safety Class I product (provided with a protective earthing
terminal). An uninterruptible safety earth ground must be provided from the
main power source to the product input wiring terminals, power cord, or
supplied power cord set. Whenever it is likely that the protection has been
impaired, the product must be made inoperative and secured against any
unintended operation.
Verify that the product is configured to match the available main power
source as described in the input power configuration instructions in this
manual. If this product is to be powered by autotransformer, make sure the
common terminal is connected to the neutral (grounded) side of the ac power
supply.
HP 70427A/HP 70428A User's Guide ix