Memmert ONE 7 - 45 Oilbath (Generation 2003) - Manual (Page 20)

EXCELLENT page 20
7.2.1 Adjustable temperature monitor ( TWW) Protection Class 3.1 to DIN 12880
If the manually set monitor temperatur is exceeded, the TWW takes over the control of the temperature
and starts to control at the monitor temperature. The symbol flashes as warning.
7.2.2 Adjustable temperature limiter ( TWB) Protection Class 2 to DIN 12880
If the manually set monitor temperature is exceeded, the TWB switches off the heating permanently and
can only be reset by pressing the SET key. The symbol flashes as warning.
7.3 Monitor relay
In addition the bath is equipped with an electronic monitor relay.
If a fault occurs during operation or if the selected setpoint temperature is exceeded by 10°C, then the
monitor relay continues control of the heating at this temperature in emergency operation.The symbol
flashes as warning.
Fault rectification after the monitor relay may been activated:
Check the controller for error messages (see section 12) and where appropriate contact customer service.
Example:
With a setpoint temperature of 80°C, if a fault occurs in the power unit (faulty triac) the bath continues to
operate in emergency operation at approx. 90°C.