Watlow 12LS Controller - Manual (Page 53)

4-20
The display appears as :
|----------------|
¦LL INPUT ¦
¦ UNITS ? xxx ¦
|----------------|
Press YES to select the menu or NO to advance to the next menu.
Press UP and DOWN to cycle through the available character choices.
Press ENTER to store the character being edited. If the third character has just been entered the display will advance
to the next menu. Otherwise, the display will move to the next character for editing and the steps are repeated.
Press BACK before ENTER to return to the SETUP LOOP INPUT main menu prompt.
4.5.2.3 EDIT LINEAR SCALING
For all inputs automatic scaling is provided. To set the scaling enter a high process variable in engineering units and a
corresponding high reading. Then enter a low process variable in engineering units and a corresponding reading. Using
points as near as possible to zero and full scale is best. After these entries the process variable, the setpoint and alarms
will all be in engineering units.
Table 4-4 shows the default values for process variable and process reading points for all input types.
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¦ TABLE 4-4. DEFAULT SCALING ¦
|--------------------------------------------------------------¦
¦ Input Type ¦ High PV ¦ High RDG ¦ Low PV ¦ Low RDG ¦
|--------------¦-----------¦-----------¦-----------¦-----------¦
¦ LINEAR ¦ 1000 ¦ 1000 ¦ 0 ¦ 0 ¦
¦ J T/C ¦ 1400 ¦ 1400 ¦ -350 ¦ -350 ¦
¦ K T/C ¦ 2500 ¦ 2500 ¦ -450 ¦ -450 ¦
¦ T T/C ¦ 750 ¦ 750 ¦ -450 ¦ -450 ¦
¦ S T/C ¦ 3200 ¦ 3200 ¦ 0 ¦ 0 ¦
¦ R T/C ¦ 3210 ¦ 3210 ¦ 0 ¦ 0 ¦
¦ B T/C ¦ 3200 ¦ 3200 ¦ 150 ¦ 150 ¦
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