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Raghunathan
11/17/13 03:37
Read: 851 times
Chennai
India


 
#190144 - Specs that are not normally told..
Responding to: Jan Waclawek's previous message
Jan Waclawek said:
And, of course, I doubt any manufacturer would say anything beyond this unless you buy his potentiometers by trucks.


I would tend to agree here - for any product there are some specs that are never divulged in the normal course. This whole requirement arose beacuse I was trying to verify a data acquistion channel meant for a 2 wire loop powered transmitter. In the absence of a calibrator I replaced the transmittter with a combination of 5k/1.5W potentiometer + 1kOhm series resistor. It did the job - quick and dirty - but I was not at ease about the potentiometer when near the 20mA setting. [ loop was powered by a 24V dc source ]

Raghu

List of 15 messages in thread
TopicAuthorDate
Power rating of potentiometers      Raghunathan      11/14/13 21:24      
   Not the point      Andy Neil      11/15/13 11:47      
      show me such        Jan Waclawek      11/16/13 13:48      
         (was) incorrect      Erik Malund      11/16/13 18:02      
            not your average "pot"      Andy Neil      11/17/13 07:40      
         Specs that are not normally told..      Raghunathan      11/17/13 03:37      
            power      Joseph Hebert      11/17/13 04:10      
            test bench vs field design       Jim Granville      11/17/13 12:13      
         That was kind of my point      Andy Neil      11/17/13 07:50      
   pot limits      Joseph Hebert      11/17/13 04:00      
      While I don't disagree ... there are different failure modes        Richard Erlacher      11/17/13 14:50      
   Bourns says: "yes."        Kai Klaas      11/18/13 16:08      
      Tesla says: no      Jan Waclawek      11/19/13 14:11      
      cermet or wirewound      Jan Waclawek      11/20/13 01:02      
         No big difference, if it all      Kai Klaas      11/23/13 06:10      

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