200kΩ or a 250kΩ for a replacement of a 220kΩ Trimmer Potentiometer Resistor

[Michael/5of9]

A good day to you at Electronics Point;

I’m replacing a 220kΩ Trimmer Potentiometer Resistor as it has dead spots; the nearest available size is a 200kΩ or a 250kΩ, please can you advise which one to fit, thank you.

 

[(*steve*)]

Either one is fine

 

[Harald Kapp]

You may probably be able to use either of the two.
If you need to come real close to 220 kΩ, use the 250 kΩ potentiometer and connect a 1.8 MΩ resistor across the endpoints of the potentiometer.

 

[Michael/5of9]

Thank you to you to both; your help is much valued.

Piher; they are adjustable from both sides (so I believe) this was actually what I was looking for and I have found their 220kΩ for sale.

http://www.piher.net/sensors/index....category_id=1&option=com_virtuemart&Itemid=31

 

[Harald Kapp]

Looks good if the pin pitch matches the one of the old pot.

 

[Michael/5of9]

I tested the resistance value of the 4 new ones 220kΩ; they all varied around 211-219kΩ none were over.

I won’t know the exact resistance required; as to whether a 200kΩ or a 250kΩ for a replacement would have been alright for this Anagas Electronic Flue-Gas Analyser as will be sent away to a specialist for re-calibration and then that person probably won’t have a record of a known value?

 

[shrtrnd]

I don't know who your 'specialist' is, but if you're sending this to somebody who repairs/calibrates this model, they may have the correct part on-hand, or be able to buy from the equipment mfgr. In any event, if he repairs/calibrates, he ought to return the instrument to you within factory specs.