User`s manual

Step-1 : Connect Mainframe Safety Ground (if necessary)
When operating the Agilent 1401B or E1421B at mains frequencies
greater than 66 Hz, you must connect a safety ground.
Warning For protection from electrical shock when operating at mains
frequencies greater than 66 Hz, connect the chassis ground
terminal to permanent earth ground.
Avertissement Risque de Choch électrique. Si la fréquence du secteur est
supérieure à 66 Hz, relier la borne de masse du chassis à une
prise de terre fixe.
Grounding
Procedure
Connect a 16 AWG (1.3 mm or larger) wire to the PEM nut shown below.
The wire must be green with a yellow stripe or bare (no insulation). Use an
M4 x 10 screw, grounding lug, and toothed washers (or toothed lug) as
shown in the figure on the following page. Securely attach the other end of
the wire to a permanent earth ground using toothed washers or a toothed lug.
Figure 1 - 1. Grounding Connection
C-Size Configuration Guide Configure the VXI Mainframe 1-2