Hioki LR8410-20, Instruction Manual

Page: 26 / 364

Operating Precautions
14
Handling of temperature and humidity sensor
Model Z2000 Humidity Sensor and Model Z2010/Z2011 Humidity Sensor
are not dustproof or waterproof. Do not use the sensor in locations where
it may be exposed to dust or water. It may cause a malfunction of the
instrument.
• Sensor sensitivity and precision will degrade over time, even under nor-
mal operating conditions. To maintain the instrument’s ability to make
measurements that conform to the accuracy specifications, it is recom-
mended to replace the temperature and humidity sensor with a new unit
once it has been used for one year after being opened.
• When the sensor is used outside the specified operating (storage) envi-
ronment, the sensor accuracy may deteriorate even within the 1 year
accuracy warranty period and accurate measurement cannot be per-
formed.
• In principle, the surface of the instrument’s temperature and humidity
sensor may become contaminated if exposed to an environment contain-
ing organic gases (ketone, acetone, ethanol, toluene, etc.), increasing
the error component of humidity measurement.
• Do not expose the temperature and humidity sensor to any concentrated
chemical solvent for an extended period of time while it is used or stored.
• The sensor may become contaminated by organic gases released from
some types of vinyl chloride and packaging material.
• When the temperature and humidity sensor is not used, place it with a
drying agent in a plastic bag, seal the bag completely, and store it in a
cool, dark place.
• Do not allow any condensation to form. Condensation can form particu-
larly in any environment where the temperature changes drastically.
• This instrument does not come with a guarantee against any problem
when the sensor is used outside the specified operating (storage) envi-
ronment.
• Change in humidity (lower to higher, or higher to lower) affects measured
humidity values due to hysteresis. For the Z2000 Humidity Sensor, an
arithmetic difference of about 3%RH will arise; for the Z2010/Z2011
Humidity Sensor, an arithmetic difference of ±1%RH or narrower will
arise.