GL900 USER'S MANUAL - Graphtec

General Description
CAUTION
Do not block the air vent on the GL900, as this will cause malfunctioning.
Measurement accuracy may not be satisfactory if the system is used in a condition other than
described above.
Use both the stands of the GL900 when you use it at an angle. Otherwise, the unit will fall down. Open
both the stands before use as shown in this figure.
1.4 Notes on Temperature Measurement
Please observe the following precautions when performing temperature measurement.
(1) Do not use a thick lead with high heat discharge (0.65 or less is recommended).
(2) Do not block the air vents. Always provide a space of at least 30 cm on all sides of the GL900.
(3) For stabilized temperature measurement, allow the GL900 to warm up for at least 30 minutes
after turning it on.
(4) Exposure of the input terminals to direct drafts, direct sunlight, or abrupt changes in
temperature may impair the equilibrium of the input parts and result in measurement errors. To
measure temperature in such an environment, take appropriate countermeasures such as
changing the installation site of the GL900.
(5) To conduct measurement in noisy environments, connect the GL900’s GND terminal to ground
(refer to page 2-16).
(6) If measured values fluctuate due to noise, set to a slower sampling speed (refer to page 3-23).
1.5 Notes on Using the Monitor
The monitor is an LCD display unit, and so the display will vary depending on the operating environment.
CHECKPOINT
If the screen saver function is used, it will operate and clear the screen if no operations are performed
during the preset time. If the screen saver operates, press any key to restore the display.
CAUTION
• Condensation may form on the LCD screen if the GL900 is moved from a cold to a warm location. If
this occurs, wait until the LCD screen warms up to room temperature.
• The LCD screen is manufactured to extremely high precision. Black dots may appear, or red, blue,
and green dots may not disappear. Likewise, streaks may appear when viewed from certain angles.
These phenomena are due to the LCD screen construction, and are not signs of a fault.
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