Models 375-31H Area Monitor with Neutron Detector
Section 6
Ludlum Measurements, Inc.
Page 6-2
January 2021
Warning Markings and Symbols
Caution!
The operator or responsible body is cautioned that the
protection provided by the equipment may be impaired if
the equipment is used in a manner not specified by Ludlum
Measurements, Inc.
The Model 375-31H is marked with the following symbols:
CAUTION, RISK OF ELECTRIC SHOCK
(per ISO 3864, No. B.3.6)
– designates a terminal (connector) that allows connection to a voltage
exceeding 1 kV. Contact with the subject connector while the instrument is
on or shortly after turning off may result in electric shock. This symbol
appears on the side panel (Applicable for Models with an external detector).
DIRECT CURRENT (DC)
(IEC 417, No. 5032) - designates an input
receptacle that accommodates a power cord intended for connection to DC
voltages. This symbol appears on the side panel.
PROTECTIVE CONDUCTOR TERMINAL
(per IEC 417, No. 5019)
– designates the central grounding point for the safety ground. This symbol
is visible inside the chassis.
CAUTION
(per ISO 3864, No. B.3.1) – designates hazardous live voltage
and risk of electric shock. During normal use, internal components are
hazardous live. This instrument must be isolated or disconnected from the
hazardous live voltage before accessing the internal components. This
symbol appears on the side panel.
Note the following precautions:
Caution!
Do no touch the circuit board in the calibration window due
to possible electric shock.
Caution!
Verify instrument voltage input rating before connecting to a
power converter. If the wrong power converter is used, the
instrument and/or power converter could be damaged.
