GRAPHTEC WR300 - Notes on Temperature Measurement; Notes on Using the Monitor; Changing the Display Language; Protecting the Thermal Head

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General Description
1.4 Notes on Temperature Measurement
Please observe the following precautions when using the WR3-M AMP (voltage/temperature amp) to perform
temperature measurement.
(1) Do not block the air vents. Always provide a space of at least 30 cm on all sides of the WR300/310.
(2) For stabilized temperature measurement, allow the WR300/310 to warm up for at least 30 minutes after
turning it on.
(3) Exposure of the WR3-M AMP's (voltage/temperature amp) 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 WR300/310.
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 WR300/310 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 English, French, or Japanese as the language displayed on the screen. The default display
language is set to English (US) when the WR300/310 is shipped overseas. To change the display language,
see the instructions in "Changing the Display Language".
1.7 Protecting the Thermal Head
This recorder is provided with a circuit for protecting the thermal printhead. When the solid-fill area of
recording is large, this circuit protects the thermal printhead by lowering the print density so that current
above a stipulated level will not flow to the thermal printhead.
As soon as the solid-fill area of recording is decreased, the print density automatically resumes its usual
level.
In the event that the print density fluctuates too often, reduce the solid-fill area of recording by such means
as changing the Record Format setting, lowering the print density, and so on.