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2.4 Instrument Power Switch

The power switch that is included in the instrument is not considered a disconnecting device. It only

disconnects one current carrying conductor to power o the device. The user should congure the

equipment with an external switch or circuit breaker for disconnecting it from each operating energy supply

source. In compliance with EN61010-1 for permanently connected equipment this switch should meet the

following guidelines.

a. It shall be included in the building installation.

b. It shall be in close proximity to the equipment and within easy reach of the operator.

c. It shall be marked as the disconnecting device for the equipment.

d. It shall not interrupt the protective earth conductor.

e. It shall be in compliance with EN 60947 series, the rated voltage shall be at least equal to the rated

input voltage of the equipment and the rated current shall be equal to the rated input current of the

equipment.

Be sure to select the appropriate wire gauge for use with the APT 8500 AC

power source. The line cord and all applicable xturing must be capable

of handling the output current produced by the AC power source.

2.5 Power Cable

Before connecting power to this instrument, the protective ground (earth)

terminals of this instrument must be connected to the protective conductor

of the line (mains) power cord. The main plug shall only be inserted in a

socket outlet (receptacle) provided with a protective ground (earth) contact.

This protective ground (earth) must not be defeated by the use of an

extension cord without a protective conductor (grounding).

The mains plug is used as the disconnecting device and shall remain readily

operable. The socket-outlet shall be installed near the equipment and shall be

easily accessible.

The main plug shall only be inserted in a socket outlet with a protective

ground (earth) contact. This protective ground must not be defeated by the

use of an extension cord without a protective conductor.

Model 8505 - Do not replace the power supply cord with an improperly rated

cord. For North American: A UL listed and CSA labeled power cord must be

used with the instrument in the United States and Canada. The power cord

must include a NEMA5-15 style male plug, SVT or SJT cord sets, and be rated

for at least 125VAC, 10A, number 16 gauge (or 125VAC, 15A, number 14

gauge) wire or larger, and the length of the cord does not exceed 2 m must

be used. For European: A certied power supply cord not lighter than light PVC

APT 8520 User Manual

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