Lauda LMTZ 831, Operating Instructions Manual

PTT

Installation and operation

YAME0020 / 30.06.11 

16

 
4.3 

Checking the filling level 



 The optimum amount of tempering liquid is 

6.5 ml. With an insufficient filling level for the 
tempering liquid it can be topped up even with 
the beaker in place. To do this the required 
amount of tempering liquid is introduced 
through the filling hole using the filling syringe. 



 It is desirable to have a sufficiently high 

filling level of tempering liquid for the best 
possible heat transfer. 



 With longer tempering processes visually 

check the filling level. 

4.4 Switching 

off 

●

 The PTT can be switched off at 

any time 

by actuating the 

switch ("Off" = 

O

). 

4.5 

Standby

 mode 

The PTT can be put into a 

standby

 mode. To do this the control knob is held pressed for at least 3 se-

conds. 

In this way all electrical components (fans, magnetic stirrer, power electronics for the thermostating unit) 
are deactivated. 

The 

standby

 function is used for periods in which the beaker is removed from the system (e.g. when 

changing the sample liquid) or for (measurement) phases which require a vibration-free environment.  

The device must be put into the standby mode when the temperature sensor is out of the 
sample liquid for longer than two minutes in order to prevent overheating of the system and 
triggering of the EMERGENCY-OFF function. 

Return to the operating mode occurs by again pressing the control knob for at least three seconds.