Safety Functions; Timer And Ramp-Function - Heidolph LABOROTA 20 control Mode D'emploi

21. Safety functions

All of the following cause LED ON situations.

The Safety Cover LED tells you that the enclosure is
open. Rotation won't start, or rotation is going to stop.
Close hood and hit Start Rotation key.

Flask Support LED : Flask support is not in its extreme
position (either side). Rotation won't start, or rotation is
going to stop, lift won't work.
Move flask support to extreme position (both sides) and
secure with knurled knobs (5), (page 103).

LED Rotation Stop LED: Drive lock engaged, rotation
can't start. Release lock by turning knob CCW.

Overheat Protection LED: Bath temperature beyond
acceptable limits. Heater won't start, heater is disconnected. Check heater for possible
problems.
Overheat Protection LED flashing: After response, over temperature protection enters
Emergency mode (refer to next paragraph).
Heater won't start, heater is disconnected.
Possible reasons: heating bath level insufficient, heating bath dry; refill.
Heater is broken.
After repair action allow bath to cool off and reset over temperature protection by depressing
little button with screwdriver.

Emergency LED: Emergency CUT-OUT actuated or over temperature protection response
(refer to para. above)
Heating bath lift descends automatically;
Heater and rotation OFF;
vacuum is turned OFF and system aerated.
Continuous buzzer
Reset with master switch OFF and ON

The Emergency LED being lighted and the Akt Vacuum LED flashing the same time means
the safety circuit detected an overpressure situation (refer to para. 19 page 90).
Heating bath lift descends automatically;
Heater and rotation OFF;
vacuum is turned OFF and system aerated.
Continuous buzzer
Reset with master switch OFF and ON
Timer and ramp functions allow to program time ramps for vacuum pressure (p const mode), T
auto ( T auto mode), bath temperature and speed.
10 steps are available for every parameter.
A total of 40 individual times can be programmed.

TIMER AND RAMP-FUNCTION

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