GRAPHTEC GL820 - Notes on Temperature Measurement; Notes on Using the Monitor; Changing the Display Language

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CHAPTER 1 General Description
1.4 Notes on Temperature Measurement
Please observe the following precautions when performing temperature measurement.
● Do not block the air vents. Always provide a space of at least 30 cm on all sides of the GL820.
● For stabilized temperature measurement, allow the GL820 to warm up for at least 30 minutes after
turning it on.
● 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
GL820.
● To conduct measurement in noisy environments, connect the GL820’s GND terminal to ground (refer to
page 2-21).
● If measured values fluctuate due to noise, set to a slower sampling speed (refer to page 3-19).
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.
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.
 • Condensationmay form on the LCD screen if the GL820 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.
1.6 Changing the Display Language
You can choose the language displayed on the screen. The default display language is set to English when
theGL820isshippedoverseas.Tochangethedisplaylanguage,seetheinstructionsin"OTHER:Language".