Notes On Temperature Measurement; Notes On Using The Monitor; Changing The Display Language - GRAPHTEC GL840 User Manual

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 GL840.
•
For stabilized temperature measurement, allow the GL840 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
GL840.
•
To conduct measurement in noisy environments, connect the GL840's GND terminal to ground (Refer to
"2.16 Noise Countermeasures".).
•
If measured values fluctuate due to noise, set to a slower sampling speed (Refer to "(2) DATA setting" in "3.4
Setting Menus".).

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.
•
When the screen saver function is enabled, the screen will not be displayed if there is no operation for
the set time.
•
To display the screen, press any of the operation keys. The screen display will resume.
•
Condensation may form on the LCD screen if the GL840 is moved from a cold to a warm location. In
such a case, wait for the power-on until the LCD screen reaches room temperature.
•
The LCD screen is manufactured with very high precision technology, but black dots may be visible and
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 GL840 is shipped overseas. To change the display language, see the instructions in "OTHER:Language".
CHAPTER 1 General Description
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