Yamato Scientific BH500 Thermo-Elite - Manual (Page 26)

23
Incidental function
independent temperature overheating prevention device (BH500)
There are two kinds of safety devices for overheat prevention. They are an automatic overheat
prevention of controller (auto return) and an independent temperature overheating prevention
device (manual return) composed of circuit and sensor independent of the controller. Double
safety measures are considered to this machine.
1. Range of set temperature and function
Range of set temperature ： 0∼399℃
Input method ： A digital switch of the treble is used. Turn the drum of each digit
and make to an arbitrary value. Note that the digit of 100 can
input only the numerical value to 0-3.
Function ： When rising more than the temperature which the measurement
temperature set in an independent temperature overheating
prevention device, the heater output is intercepted. The leak
breaker becomes and the function becomes effective while turned
on. ER07 blinks to a main display when an independent
temperature overheating prevention device operates and the
blinking display is done and the sign of abnormality (TROUBLE)
blinks. When the independent temperature overheating
prevention device is activated during heater ON, ER07 and ER03
are alternately displayed.
2. How to use
• Set 15℃ or more higher than set temperatures of this machine usually.
• Make to a value which is very higher than the room temperature to set an appropriate value for
the protection of the sample etc. Moreover, Set 15℃ or more higher than the highest, set
temperatures in the driven temperature pattern.
• Be careful please not to lower more than an in-flight temperature and be careful not to drive a
set temperature of an independent temperature overheating prevention device as a low setting.
Do setting over again after turning off the leak breaker once when you operate this machine by
mistake. Refer to item (P.22) of the safety device and the error code when this machine
operates depending on other causes.
3. Notes
• The digit of 100 of a digital switch can input only the numerical value to 0-3. There is a
possibility damaging the switch when the drum is forcibly turned.
• It is likely not to notice to the change of a set temperature when a set switch is cleaned the
hand's touching the switch. Confirm whether a set temperature is an appropriate value before
begin to be come in contact with this machine and to be driven.