Yokogawa Pneumatic Retractables RF20H - Manual (Page 5)

IM 12B06K05-E-E
5
1.5 Safety equipment
Position The retract protection prevents the
“service” insertion rod from retracting without
sensor in the process as this would
cause a leakage of process liquid.
• The sensor can only be installed/
removed when the holder is in the
“service” position.
• Disabling the retract protection is
considered as negligence.
Position In the “measuring” position the
“measuring” sensor is immersed in the drive unit.
• You cannot remove the sensor.
• Trying to remove the sensor
in the “measuring” position is
considered as negligence!
Protection You may adjust the protection cage
cage at the end of the insertion rod in
order to protect the sensor from
mechanical impacts.
1.6 Staff
Qualifications Leave installation and servicing of
the retractable holder to trained staff!
Protective The operation staff must wear
clothing goggles and applicable protective
clothing during commissioning and
servicing works.
Accident Observe work safety laws and
prevention regulations applicable in the
regulations operator’s country and at the site of
use!
1.7 Disposal
Observe regulations and rules for waste disposal
applicable in the operator’s country and at the site
of use.
1.8 Symbols and pictograms
Pictograms and symbols are used in
the operation manual to provide better
orientation.
The safety note with the DANGER! signal
indicates the risk of personal danger and
high material damage in case of failure to
observe the instructions.
The safety note with the CAUTION! signal
indicates the risk of material damage in case
of failure to observe the instructions.
Indicates an important note!
This sign indicates that the operations
should be carried out in the specified order.
1.9 Reliable Use in Explosive
Atmospheres
For a reliable use under potential explosive
conditions please regard the following remarks:
• Avoid electrostatic charges on the top of the drive
unit. Wipe with an antistatic cloth only.
• The electrostatic charge must be taken into
account in case of parts not made of a conductive
material. This applies particularly for non-
conductive fluids.
• The sensor must conform to Directive 94/9EC and
the ambient temperatures must be observed.
• It must be ensured that the compressed air does
not contain a potentially explosive atmosphere.
• It must be ensured that the extension and
retraction movements of the sensor do not
damage the connection.
• The various temperature classes of the different
materials must be observed.
• A liquid potential equalisation must be ensured.
CAUTION!
DANGER!
WARNING!
CAUTION!
DANGER!
WARNING!
CAUTION!
DANGER!
WARNING!
CAUTION!
DANGER!
WARNING!