SINQ Wiki: Diff: SeaHelp

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JSPWiki v2.0.52

           Difference between 
          version 8 
          and 
          version 7:
          
          
At line 24 added 13 lines.
+
+ !The needle valve control is unstable
+ * If you are in automatic mode, switch to controlled mode, and
+ select the flow by hand (a good flow value is selected when the
+ heater power at 10 K (stable) is about 0.15 W.
+ * If you are in controlmode, you might need to increase the "int"
+ value (to 10 or even 100 sec) and reduce the "minimal pulse" value
+ to 0.05 sec.
+ * You might also consider to work in fixed mode (after having found
+ a reasonable needle valve motor position) when not changing
+ the temperature over a long time. In fixed mode you can also
+ move the motor directly from the needle valve controller by means
+ of the arrow keys.


          

      

      

      
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 At line 24 added 13 lines.
++
++ !The needle valve control is unstable
++ * If you are in automatic mode, switch to controlled mode, and
++ select the flow by hand (a good flow value is selected when the
++ heater power at 10 K (stable) is about 0.15 W.
++ * If you are in controlmode, you might need to increase the "int"
++ value (to 10 or even 100 sec) and reduce the "minimal pulse" value
++ to 0.05 sec.
++ * You might also consider to work in fixed mode (after having found
++ a reasonable needle valve motor position) when not changing
++ the temperature over a long time. In fixed mode you can also
++ move the motor directly from the needle valve controller by means
++ of the arrow keys.