GRAPHTEC GL840 User Manual page 9

• Locations subject to strong vibrations or shock.
• Locations subject to surge voltages and/or electromagnetic interference.
(4) If the main unit becomes soiled, wipe it off using a soft, dry cloth. Use of organic solvents (such as thinner
or benzene) causes deterioration and discoloration of the outer casing.
(5) Do not use the GL840 in the vicinity of other devices which are susceptible to electromagnetic
interference.
(6) Measured results may not conform to the stated specifications if the GL840 is used in an environment
which is subject to strong electromagnetic interference.
(7) Insofar as possible, position the GL840 input signal cables away from any other cables which are likely to
be affected by electromagnetic interference.
(8) For stabilized measurement, allow the GL840 to warm up for at least 30 minutes after turning it on.
(9) When you want to use in combination of the Petit LOGGER GL100-WL (separately sold) and various
modules (such as GS sensor and terminal / adapter), please refer to the GL100 User's Manual.
•
When using in combination described above, please be careful to the operating environment because
the environmental conditions of the GL840 midi LOGGER are applied.
It may cause abnormal operation or damage.
• Allowable temperature range: 0 to 45°C, Allowable humidity range: 5 to 85%R.H, non-condensing.
(0 to 40°C when battery-powered / 15 to 35°C when charging)
When using temperature and humidity sensor (GS-TH) and the GL840 at the same time, the
operating environment of GL840 is applied.
•
Temperature and Humidity Sensor (GS-TH):
• Humidity sensors measure the change in dielectric capacity of water adsorption. As a result, humidity
from organic materials such as fine particles or exhaust gas may have an effect on the sensor. Use
in environments with large quantities of these organic materials may lead to significant measurement
inaccuracies.
•
CO2 Sensor (GS-CO2 ):
• Because exhaled CO2 may have an effect on the sensor readings, do not use the sensor to take
measurements near the face.Additionally, should air flow to the sensor be blocked, it will result in
inaccurate readings, so be sure to keep vent holes open.
•
Illumination / Ultraviolet Sensor (GS-LXUV):
• When measuring illumination or ultraviolet light that can have harmful effects on the eyes or skin, be
sure to use protective eyewear, shielding, etc.
• If the sensor becomes dirty, it may affect measurements, so wipe it with a soft cloth when it becomes
dirty.
• Take care to avoid cracking the sensor when handling it. If the sensor is damaged or cracked it may
affect measurements, so replace the sensor.
•
Others
• Depending on the usage and operating environment of Temperature and Humidity Sensor (GS-
TH), CO2 Sensor (GS-CO2), and Illumination / Ultraviolet sensor (GS-LXUV), it is recommended to
replace periodically the sensor with new one because the sensor performance may be deteriorated.
• When connecting the GS-3AT (3-axis accelerometer) module to the GL840 midi LOGGER, please
note that IP54 standard is not satisfied.
Introduction
III