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4. OPERATION PROCEDURES
Overheat Prevention Device Setup
This unit features an overheat prevention device (manual reset) which, has an independent temperature
monitoring circuit, CPU, sensor and output circuit, but uses the same power source, display, and keys as the
control panel. This is in addition to the internal automatic overheat prevention function (auto reset), built in for
added measure against overheating.
The automatic overheat prevention function (auto reset) is integrated internally into the unit and is set to
automatically activate (cutting off power to heater) when chamber temperature exceeds temperature setting on
control panel by 6°C. Function is released (automatically) when temperature returns to 5.9°C or below. These
parameters are set at the factory and cannot be modified.
Setting range/function
The overheat prevention device temperature setting range is from 0°C to 50°C beyond the maximum
temperature setting for BA series units.
When chamber temperature exceeds objective temperature setting and reaches that of the overheat prevention
device, the circuit is shut off and error code "Er19" is shown flashing in the control panel display, accompanied
by a sounding alarm.
Once activated,"Er19" continues to be displayed until main power switch (ELB) is turned off (wait 5 seconds)
then back on.
Setting temperature for
overheat prevention
1. Turn on main power switch (ELB).
Default values are displayed for about four seconds.
Turn on power. Displays will show initial settings. Current
chamber temperature (top), main temperature setting (center)
and temperature setting for overheat prevention device
(bottom) will show in respective displays.
2. Set temperature for overheat prevention
①
Press the SUBMENU key.
②
Press
▼▲ several times until
shows in the top
display.
③
Press the ENTER key. The temperature setting will be
shown flashing in center display.
Note:
To prevent false errors, set the value 10
°
C or more above the
main temperature setting.
④
Select value using the
▼▲ keys and press the ENTER key.
Setting value will show in the bottom display. This completes
the setting.
⑤
Press ENTER
CAUTION
①
The standard setting temperature of device is “maximum unit temperature setting of plus 10°C” or
“temperature setting plus 10°C”. If unit performs poorly, increase by 5°C more.
Note that improper temperature settings may cause malfunction resulting in equipment damage or
fire. Always use appropriate temperature settings.
The factory default setting for overheat prevention device is 90
°C
. Do not attempt to set
value higher.
②
Overheat prevention device is designed to protect unit against overheating, not to protect test
samples against damage caused by overheating, nor to protect against injury or death resulting
from negligence from processing explosives, inflammables or other hazardous substances in this
unit.
①
②
③
④
⑤
Summary of Contents for BA300
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