User Manual

4-6 Heater Control for Windows
Figure 4-5
The Input dialog box in Figure 4-5 is used to define the input types for each loop. Unused
loops which do not have heaters attached are defined as “skipped”. Also, any process offsets
to make up for signal inaccuracy are set here. All settings in this dialog box are set for each
loop in your system at the Asymtek factory prior to shipping.
Input Reading Offset can be used to make up for a calibration offset. The thermocouple
inside of the heating element may register a value that is different than the temperature of the
part. Also, for temperatures below 400
° F (204° C) a thermocouple may be inaccurate by
several degrees. To adjust for this offset, use an independent thermocouple and determine
the true temperature of the part you are heating. The difference between the true temperature
and the PV is the offset. To add this information to this menu, change the Input Reading
Offset. A positive number increases the reading. Input Filter is usually used to compensate
for noisy signals. However, the dispensing systems are shielded to avoid noise.
Only trained engineering personnel should attempt to make offset
measurements or change any settings in this dialog box.
· Select the Output tab.