Jeio tech IST-3075, Operating Manual, Page: 36 / 70

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
Alarm is not effective if Sound Off is set on the General Setting.

Deviation Alarm is not effective once the present value reaches to the setting value. (set time, in
permission range)

Deviation alarm is initialized under the below situation.
- Set the setting value
- Get back to the work after stopping the control. (Door open, Stop operating)

Once the Deviation initialized, the unit check the present value. If the temperature not reaches
to the SV for 4 hours and the rpm not reaches to the SV for 10 minutes, Deviation check is
started.
 The range of permission and the period of Deviation is changeable on the System Setting.

Once Load Unbalance is generated and the setting rpm is changed, the changed rpm is on the
display with red color.
1 Temperature Limit Digital temperature regulator is active. The temperature of inside of
chamber is out of range. Stop the unit for unit and user’s safety.
Check the range of the temperature regulator.
2 Load Unbalance Shaking system has severe vibrating so that the unit must be
stopped. Unbalanced sample attaching, heavy sample attaching, un-
flat ground are the causes. Shaking system is stopped.
3 Door Open Once the door is opened for 5 minutes, the unit is stopped and
generates the alarm.
4 Sensor Fault Temperature sensor is faulty so that the operating is stopped.
5 Over Current Over current is generated so stop the unit. Main causes are over-load
and obstacle inside of the system.