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9. Handling Precautions
* In the text, "IT controller JRN - 330K" described in this specification is "this
device"
9.1. Specification values
Please be sure to follow the specifications of this device. Using more than the specified
value can cause a malfunction.
（１）
Power supply voltage: Main unit (input voltage)
It is the maximum voltage that can be applied between the power supply terminal and
The grounding terminal (GND), and exceeding this voltage may cause fire, electric shock
or failure.
（２）
Operating temperature
It is a temperature range that can operate with satisfying the specifications,
and beyond this temperature range may not satisfy the performance.
It may cause malfunction
（３）
Storage temperature
It is the temperature range when you keep it without operating it. If it exceeds this
temperature range, performance may not be satisfied. It may cause malfunction.
9.2. Usage Notes
（１）
Do not remove or disassemble the screw of this device for purposes other than
maintenance. It may cause performance degradation, fire, electric shock or breakdown.
（２）
Be sure to take countermeasures against static electricity when maintenance is
performed by removing the screws of this device (battery replacement, etc.).
It may cause performance degradation or malfunction. After tightening the screws,
check that the waterproof performance is appropriate.
Note: If you remove screws other than Japan Radio Co., Ltd. (battery replacement etc.)
performance guarantee will not be possible.
（３）
If this device is dropped or left outdoors for a long time, it will cause scratches,
dirt and damage.
（４）
This device is not designed for use in the following special environments:
Please do not use it under the following special circumstances as it may cause
performance degradation or malfunction.
· Attachment of water, oil, chemical liquid, organic liquid agent etc. and in liquid
· In the dust
· Places where many corrosive gases such as salt wind, chlorine, hydrogen sulfide,
ammonia, sulfur oxide, hydrogen chloride, bisulfite gas etc. are generated
· Strong environment of static electricity and electromagnetic waves
（５）
Do not use on medical equipment, space, aviation equipment, disaster prevention,
method equipment and other equipment that require high stability that affects
human life.
（６）
Do not use near a person wearing medical electrical equipment etc. There is a danger
Of malfunction of medical equipment etc. due to influence of radio waves.
（７）
Depending on the model, it may effect on-vehicle electronic equipment, so when
installing or wiring, install and route it as far as possible from the on-board
electronic equipment. Please install as far away as possible from car navigation and
other antennas in particular. It may cause performance degradation.
（８）
Do not damage, break, or process each cable. Do not place heavy objects on the unit,
heat it, pull it, or forcibly bend it, the cable may be damaged, causing fire or
electric shock.
（９）
Do not deliberately put the unit in water or wet it Doing so may cause electric shock or
malfunction. Wipe with water cloth and wipe with a dry cloth.
（１０）
Do not operate while the construction machine is in operation, causing accidents.
