specs Siemens NTC K164/1K5

[Huub]

Hi,

Can somebody tell me the temperature specs of this NTC resistor? Through
Google I've come across some hits, but they don't mention specs.

Thank you,

Huub

 

[legg]

On Fri, 10 Jun 2005 15:33:37 +0200, Huub
<hdotvdotniekerkathccnetdotnl> wrote:

Hi,

Can somebody tell me the temperature specs of this NTC resistor? Through
Google I've come across some hits, but they don't mention specs.

http://www.epcos.com/inf/50/db/ntc_02/00720073.pdf

RL

 

[legg]

On Fri, 10 Jun 2005 15:33:37 +0200, Huub
<hdotvdotniekerkathccnetdotnl> wrote:

Hi,

Can somebody tell me the temperature specs of this NTC resistor? Through
Google I've come across some hits, but they don't mention specs.

forgotten - use curve 1011

http://www.epcos.com/inf/50/db/ntc_02/01470178.pdf

RL

 

[Huub]

legg wrote:

On Fri, 10 Jun 2005 15:33:37 +0200, Huub
hdotvdotniekerkathccnetdotnl> wrote:


Hi,

Can somebody tell me the temperature specs of this NTC resistor? Through
Google I've come across some hits, but they don't mention specs.


forgotten - use curve 1011

http://www.epcos.com/inf/50/db/ntc_02/01470178.pdf

RL

Thank you.

 

[Huub]

legg wrote:

On Fri, 10 Jun 2005 15:33:37 +0200, Huub
hdotvdotniekerkathccnetdotnl> wrote:


Hi,

Can somebody tell me the temperature specs of this NTC resistor? Through
Google I've come across some hits, but they don't mention specs.


forgotten - use curve 1011

http://www.epcos.com/inf/50/db/ntc_02/01470178.pdf

RL

There 1 problem for me: I need to calculate the temperature, not a

resistance. The interface I'm working with, and where the 1.5K NTC is
connected to, provides me with a digit from 0 to 1023. Let's say
I get the value 484. What would the temperature be then?

Thank you for helping me out.

Huub

 

[Spehro Pefhany]

On Sat, 11 Jun 2005 10:53:08 +0200, the renowned Huub
<hdotvdotniekerkathccnetdotnl> wrote:

legg wrote:
On Fri, 10 Jun 2005 15:33:37 +0200, Huub
hdotvdotniekerkathccnetdotnl> wrote:


Hi,

Can somebody tell me the temperature specs of this NTC resistor? Through
Google I've come across some hits, but they don't mention specs.


forgotten - use curve 1011

http://www.epcos.com/inf/50/db/ntc_02/01470178.pdf

RL

There 1 problem for me: I need to calculate the temperature, not a
resistance. The interface I'm working with, and where the 1.5K NTC is
connected to, provides me with a digit from 0 to 1023. Let's say
I get the value 484. What would the temperature be then?

Thank you for helping me out.

Huub

You've only got a 10-bit ADC? So calculate the input for every
temperature over the range and create a lookup table. It's hardly
worth doing the calculations (which involve ln(x)) even if you had the
coefficients.



Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

 

[legg]

On Sat, 11 Jun 2005 10:53:08 +0200, Huub
<hdotvdotniekerkathccnetdotnl> wrote:

legg wrote:
On Fri, 10 Jun 2005 15:33:37 +0200, Huub
hdotvdotniekerkathccnetdotnl> wrote:


Hi,

Can somebody tell me the temperature specs of this NTC resistor? Through
Google I've come across some hits, but they don't mention specs.


forgotten - use curve 1011

http://www.epcos.com/inf/50/db/ntc_02/01470178.pdf

RL

There 1 problem for me: I need to calculate the temperature, not a
resistance. The interface I'm working with, and where the 1.5K NTC is
connected to, provides me with a digit from 0 to 1023. Let's say
I get the value 484. What would the temperature be then?

It depends on what the digits represent - how they are generated.

If they represent a recording of resistance, then you need to know
what zero and full scale represent, and whether the scale is linear or
logarithmic, to interpolate intermediate values.

The Siemens app notes give a formula for converting temp to resistance
or vice versa, using material type 'K' values.

Why are you using this part, if it is so unfamiliar to you? Are you
just doing homework for school?

RL

 

[Huub]

It depends on what the digits represent - how they are generated.

If they represent a recording of resistance, then you need to know
what zero and full scale represent, and whether the scale is linear or
logarithmic, to interpolate intermediate values.

The Siemens app notes give a formula for converting temp to resistance
or vice versa, using material type 'K' values.

Why are you using this part, if it is so unfamiliar to you? Are you
just doing homework for school?

RL
It's for a project I'm working on. The interface it suited to be

connected with an NTC thermistor, but the analog input itself is
converted through a 10 bits AD converter. So, when I probe the
temperature, I have to convert the value from the interface into the
data I actually want. And yes, it is unfamiliar to me, since I'm a
technical informatics engineer, not an applied physics or electronics
engineer.