NTC graph generation

ruijc said:

Hi all,

i have a NTC with just the following caracteristics:

# nom. resistance: 1 kohm
# B-constant (±7%): 3700°K
# max. permissible current: 80mA
# thermal dissipation constant: 6mW/°C
# thermal time constant: 17sec.

I have no graphs so i dont know how resistance changes with temp.

How can i obtain a graph ( temp/resistance ) with these specifications ?

Thanks

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B parameter equation

NTC thermistors can also be characterised with the B parameter equation, which is essentially the Steinhart Hart equation with c=0. Using the expansion only to the first order yields:

or

or

where
R0 is the resistance at temperature T0 (usually 25 °C=298.15 K)

Click to expand...

ruijc said:

Hi Nigel,

That make's sense !

I was really hopping to obtain some kind of formula

Maybe it's not possible

Click to expand...