Specifications

Excess Temperature Protection

ALARM

BATH

14.

Excess Temperature Protection

If this safety device is triggered:

The alarm indication on the display flashes

An acoustic signal is sounded

all voltage conducting unit components (the heating

element, the pump motor and if available, the compres-

sor) are switched off immediately

i..e. the safety circuit

transfers the unit to a

stable, safe condition.

The fault cause must be identified and remedied.

After the fault has been eliminated the unit can be started

again by pressing the reset key.

14.1

Excess temperature protection dial

It offers protection against dangers caused by an uncon-

trolled heating up of the heat transfer liquid above the de-

sired set temperature.

The cut-off temperature is adjusted with the excess temper-

ature setting dial.

Proper protection can only be guaranteed

the

cut-off point has been correctly set.

There are two main aims for correct setting:

Safety (primary importance):

Protection against ignition of the heat transfer liquid.

The cut-off point must be set at least

25°C

below

the

fire point of the bath liquid used.

Protection of the object to be temperature con-

trolled (secondary importance):

Additional

protection, e.g. of

biological sample. The

cut-off point should be set as close as possible to the

desired temperature value.