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Revision to Connecting thermistors or PT1000 temperature sensors

Tony

To set the bed thermistor parameters, use a command like this:
 
<code>

M305
[code]M305 P0 R4700 T100000 B3950 ; set bed thermistor parameters

</code>
parameters[/code]
<code>

M305
[code]M305 P0 R4700 T100000 B3950 ; set bed thermistor parameters

</code>
parameters[/code]
 
The P parameter identifies the heater/thermistor channel that the command applies to. T100000 means that the resistance at 25C is 100Kohms.
For the E0 thermistor, the command is similar except that P0 is replace by P1, for example:
 
<code>

M305
[code]M305 P1 R4700 T100000 B4388 ; set E0 thermistor parameters

</code>
parameters[/code]
<code>

M305
[code]M305 P1 R4700 T100000 B4388 ; set E0 thermistor parameters

</code>
parameters[/code]
 
For the E1 thermistor, replace P1 by P2.
Use the M305 command as for a thermistor, but add parameter X500+n where N is the channel number. Only the R, H and L parameters are significant. Example:
 
<code>

M305
[code]M305 P1 X501 R4700 ; heater 1 uses a PT1000 connected to thermistor channel 1 which has a 4.7K series resistor

</code>
resistor[/code]
<code>

M305
[code]M305 P1 X501 R4700 ; heater 1 uses a PT1000 connected to thermistor channel 1 which has a 4.7K series resistor

</code>
resistor[/code]
 
PT1000 sensors connected to thermistor inputs will generally be less accurate than PT100 sensors connected via the RTD daughter board.

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