Owner's manual

11
Digital 7” Square(Hotplate)Magnetic Stirrer
The unit can be controlled from an external PC (using the
dedicated software) via the RS232 C serial interface fitted to
the unit. Data communication from laboratory instrument to
computer is only possible on demand of the computer.
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The functions of the interface lines between laboratory
instrument and automation system are selected from
the specified signals of the EIA-standard RS232C,
corresponding with DIN66020 Part 1. The allotment of
the bushing can be taken from Figure 7.
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Transmission method: Asynchronous signal transmission
in start-stop-operation.
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Mode of transmission:Fully Duplex.1start bit; 7 character
bits; 1stop bit.
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Transmission speed: 9600 bit/s.
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Start remote control knob LED display “Remote”.
Note:
F o r b i d t o in s e r t or r e m o v e th e R S 2 3 2 C
communication line when switch on!
10.Faults
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Instruments can not be power ON
-
Check whether the power cable is plugged in
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Check whether the fuse is broken or loose
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Fault in power on self test
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Switch OFF the unit, then switch ON and reset the
instruments to factory default setting.
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Temperature can switched on not reach set point
-
Check whether the safety temperature value is set too
low.
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Stir speed can not reach set point
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Check whether the stirring bar breakaway monitoring
is ON.
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Excessive medium viscosity may cause abnormal
speed reduction of the motor.
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Heating or stirring function do not start when knob is
pressed.
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Check whether the unit is in the mode setting program,
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Exit from the mode setting and restart the heating/
stirring functions.
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Unit do not power down when switched off.
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Check if the residual heat warning function is still ON
and hotplate temperature is above 50℃(the LCD still
works and“Hot”flashes).
If these faults are not resolved,please set the instruments
to factory default setting or take the unit to technical service
center.