User Manual
E727T0005, valid for E-727
BRO, 2019-06-28
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 48 / 240
Phone +49 721 4846-0, Fax +49 721 4846-1019, Email info@pi.ws, www.pi.ws
least 15 cm x 15 cm x 15 cm from the rear of the E-727.
− Do not remove the rubber feet from the bottom of the E-727 if you use it as a
benchtop device. The rubber feet ensure that the ventilation holes in the
bottom of the E-727 act as the air intake for convective cooling of internal
components (except for the amplifiers).
− If you place the E-727 in a rack: Remove the rubber feet from the bottom of the
E-727 only if the rack ensures that the ventilation holes in the bottom of the E-
727 act as the air intake for convective cooling.
See also “Overtemp Protection” (p. 39).
Connecting the E-727 to the Protective Earth Conductor
INFORMATION
Observe the applicable standards for mounting the protective earth conductor.
Prerequisite
You have read and understood the Safety precautions (p. 11).
The E-727 is switched off via the Power switch.
Tools and accessories
Suitable protective earth conductor:
− Cable cross-section ≥0.75 mm
2
− Contact resistance < 0.1 ohm at 25 A at all connection points relevant for
mounting the protective earth conductor
Fastening material for the protective earth conductor (M4 screw, two safety
washers, two flat washers), sits on the protective earth connection (M4 hole) upon
delivery of the E-727 (p. 14).
Connecting the E-727 to the protective earth conductor
1. If necessary, fasten a suitable cable lug to the protective earth conductor.
2. Remove the M4 screw with the washers from the E-727.
3. Put the washers and the cable lug of the protective earth conductor on the M4 screw in the
following order:
− Safety washer
− Flat washer
− Cable lug
− Flat washer
− Safety washer
4. Insert the M4 screw into the protective earth connection hole of the E-727.
5. Tighten the M4 screw with at least three rotations and a torque of 1.2 Nm to 1.5 Nm.
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