Operating Precautions
6
*IP54 :This indicates the degree of protection provided by the enclosure of the
device against use in hazardous locations, entry of solidforeign objects,
and the ingress of water.
5 : Protected against access to hazardous parts with wire measuring 1.0
mm in diameter. Dust-proof type (Thepenetration of dustcannot bepre-
vented completely, but quantities of dust that may hinder the stated op-
eration of equipment or safety cannot penetrate the enclosure.
4 :The equipment inside the enclosure is protected against the harmful ef-
fects of spraying water.
• The protection rating for the enclosure of this device (based on
EN60529) is *IP54.
• The Humidity Sensor is not designed to be entirely water- or dust-proof.
Do not use it in an especially dusty environment, nor where it might be
splashed with liquid. This may cause damage.
• The Humidity Sensor is not drip-proof. Water droplets on the grip or
connector may result in malfunctions.
• Although this instrument is designed to resist the ingress of dust and
water, it is not entirely water- or dust-proof, so to avoid shock or dam-
age, do not use it in a wet or dusty environment.
• If used outside the specified environmental ranges for operation (or
storage), the sensor accuracy may deteriorate in less than one year,
and accurate measurement may not be possible.
• If used outside the specified environmental ranges for operation (or
storage), the operation of the unit cannot be guaranteed.
• Humidity measurement values will be affected by about 3% (hystere-
sis) depending on the state of humidity change (low humidity to high
humidity or high humidity to low humidity).
• Take care that the temperature/humidity sensor is not exposed to a
chemical solvent having a high concentration for a long period of time
during use or storage.
• When you will not use the temperature/humidity sensor, store it in a
cool and dark place sealed together with desiccating agent in the plas-
tic bag in which it came.
• Take care to avoid condensation. In particular, if there is a sudden
change of temperature (for example moving from a cold place to a
warm one), condensation is likely to occur.
• Testing monitor batteries installed in the unit may possibly be weak.
Replace batteries before extended measurement usage.
• Use only LR6 Alkaline batteries. Using manganese batteries may not
result in accurate measurements or proper communication with the
LR5091 CommunicationAdapter and LR5092-20 Data Collector.
Avoiding Instrument Damage
To avoid damage to the instrument, protect it from physical shock when
transporting and handling. Be especially careful to avoid physical shock
from dropping.
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