712MT OPERATOR’S MANUAL 9/18/20 Page 12 of 16
OPERATOR PREPARATION
Each operator must:
•
Become familiar with the controls and operation of the trencher, preferably under the supervision of an experienced
operator.
•
Be 18 yrs. of age or older and be mentally and physically capable of operating the trencher safely.
•
Have studied the SAFETY AND OPERATING INSTRUCTIONS in this manual.
PERSONAL PROTECTION: For safety, trencher operator should wear personal protection equipment. Keep observers
at a safe distance.
Wear safety eye goggles and a hard hat while operating or observing!
WARNING
: The dig chain may throw stones and debris.
Wear safety boots and gloves. Wear close-fitting clothing. Contain long
hair. Do not wear jewelry. Wear reflective clothing if working near
traffic.
Wear adequate hearing (ear) protection while operating or observing.
WARNING
: Exposure to loud noise is cumulative and may
permanently damage your hearing.
Declared vibration emission value in accordance with EN 12096: the
average measured vibration emission value is 5.5 m/s
2
. The uncertainty
in the measurement given a 95% confidence interval is 1.1 m/s
2
. Safety
gloves help to isolate the hands from the vibration, keep them warm and
dry, maintain blood circulation, and make operators less susceptible to
vibration induced injury.
Hearing protection devices do not all provide the same level of protection. Those that completely surround each ear are
better than earplugs. It is important to select a device that is adequate and appropriate for your specific work
environment since the peak noise level varies. A local environmental noise specialist may help you to determine the
level of hearing protection required.
DECLARED DUAL-NUMBER NOISE EMISSION VALUES
in accordance with ISO 4871
Measured A-weighted sound power level,
LWA (ref. 1pW) in decibels
Uncertainty, KWA, in decibels
Measured A-weighted sound pressure level, LpA
(ref. 20µPa) at the operator's position in decibels
Uncertainty, KpA, in decibels
Operating Mode 1
92.1
3.0
88.6
3.0
Values determined according to noise test code given in Directive 2000/14/EC Annex
IIIB part 54 using the basic standard ISO 3744: 1994
NOTE - The sum of a measured noise emission value and its associated uncertainty represents an
upper boundary of the range of values that is likely to occur in measurements.
