HP 181A manual Recommended Test Equipment, Interruption is Prohibited

Chapter 2 Service

Pre-Troubleshooting Information

WARNING	BEFORE APPLYING AC POWER, THE INSTRUMENT AND ALL
	PROTECTIVE EARTH TERMINALS, EXTENSION CORDS, AUTO
	TRANSFORMERS, AND DEVICES CONNECTED TO THE
	INSTRUMENT SHOULD BE CONNECTED TO A PROTECTIVE
	EARTH GROUNDED SOCKET.
	ANY INTERRUPTION OF THE PROTECTIVE GROUNDING
	CONDUCTOR INSIDE OR OUTSIDE THE INSTRUMENT OR
	DISCONNECTION OF THE PROTECTIVE EARTH TERMINAL
	WILL CAUSE A POTENTIAL SHOCK HAZARD THAT COULD
	RESULT IN PERSONAL INJURY. INTENTIONAL
	INTERRUPTION IS PROHIBITED.
	Any maintenance and repair of the opened instrument under voltage
	should be avoided as much as possible and, if necessary, should be
	carried out only by a skilled person who is aware of the hazards involved
	(for example, fire and electric shock).
	Recommended Test Equipment
	Test equipment recommended for testing and troubleshooting the
	HP 53131A/132A/181A is listed in Chapter 1, “Performance Tests.”
	Substitute equipment may be used if it meets or exceeds the required
	characteristics listed in Table 1-1.

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Assembly-Level Service Guide 2-37