Symbols Marked on Equipment
S DANGER — High Voltage
Q Protective ground (earth) terminal
P Attention — refer to the manual. This symbol indicates that information about
the usage of a feature is contained in the manua
l.
Power Source
The 5700A/5720A Series II is intended to operate from a power source that will not apply more
than 264V ac rms between the supply conductors or between either supply conductor and ground.
A protective ground connection by way of the grounding conductor in the power cord is essential
for safe operation.
Use the Proper Fuse
To avoid fire hazard, use only the fuse specified on the line voltage selection switch label, and
which is identical in type voltage rating, and current rating.
Grounding the 5700A/5720A Series II
The 5700A/5720A Series II is Safety Class I (grounded enclosure) instruments as defined in IEC
348. The enclosure is grounded through the grounding conductor of the power cord. To avoid
electrical shock, plug the power cord into a properly wired earth grounded receptacle before
connecting anything to any of the 5700A/5720A Series II terminals. A protective ground
connection by way of the grounding conductor in the power cord is essential for safe operation.
Use the Proper Power Cord
Always use the power (line) cord and connector appropriate for the voltage and outlet of
the country or location in which you are working.
Always match the line cord to the instrument.
• Use the AC line cord supplied with this instrument with this instrument only.
• Do not use this line cord with any other instruments.
• Do not use any other line cords with this instrument.
Use only the power cord and connector appropriate for proper operation of a 5700A/5720A
Series II in your country.
Use only a power cord that is in good condition.
Refer cord and connector changes to qualified service personnel.
Do Not Operate in Explosive Atmospheres
To avoid explosion, do not operate the 5700A/5720A Series II in an atmosphere of explosive gas.
Do Not Remove Cover
To avoid personal injury or death, do not remove the 5700A/5720A Series II cover. Do not
operate the 5700A/5720A Series II without the cover properly installed. There are no user-
serviceable parts inside the 5700A/5720A Series II, so there is no need for the operator to ever
remove the cover.
Do Not Attempt to Operate if Protection May be Impaired
If the 5700A/5720A Series II appears damaged or operates abnormally, protection may be
impaired. Do not attempt to operate it. When in doubt, have the instrument serviced.
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