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Clifton Ne series 5 -28 D Water Bath Temperature

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salah 20012

#1
Iwould be grateful if somebody help me , we bought a new waterbath clifton Ne 5 series -28 D. I observed that when I run the instrument and the water temperture reach the set tempt the set tempt start to increase and the screen become red indicating alarm.Why does that happened and how can I overcome that?
 
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BradM

Staff member
Admin
#3
Is this the bath?

I'm not familiar with that type of bath. But I do know that a lot of them have alarm/overtemperature settings. Verify if there is an overtemperature alarm on the bath.

Also, see if the control parameters for the water bath need to be calculated prior to use. While it has PID controls on it, they may need to be adjusted/auto-tuned.
 

dgriffith

Quite Involved in Discussions
#4
I may be off here, but is there a chance that the shaking of the tub, and therefore agitation of the water, is the cause of the water temp increase? From the data sheet:
To protect your work in the bath the temperature controller features an automatically set +4?C alarm above set point. When activated switching the heaters off until safe working temperature.

Our metrology baths will do the same thing--turn off the heating and cooling, and leave it to stir, and the temp will go right on up. Basic physics.

This bath does not have a cooling feature. So of what use is a PID function? It does have a shaker turn-off if obstructed, but does not say that it also turns off the shaker when overtemp.

My 2 cents...
 
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