Model 194 Series
User’s Manual
Section 6
Ludlum Measurements, Inc.
Page 6-1
October 2020
Safety Considerations
Environmental Conditions for Normal Use
Indoor or outdoor use
No maximum altitude
Temperature range of -10 to 50 °C (14 to 122 °F). Display will tend to
“freeze” if kept below 0 °C (32 °F) for several hours, so users should
limit cold temperature exposure to less than two hours.
Maximum relative humidity of less than 95% (non-condensing)
Pollution Degree 3 (as defined by IEC 664): (Occurs when conductive
pollution or dry nonconductive pollution becomes conductive due to
condensation. This is typical of industrial or construction sites.)
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 194 DOSE EQUIVALENT RATE METER is marked
with the following symbols:
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 front panel. Be sure to take the precautions noted in
the next section whenever necessary.
Section
6
