Skutt GlassMaster Kiln User Manual

Page 35

LAG

“Lag” is represented by the number of degrees that any zone is allowed to trail behind the other zones. When a section

is “lagging” the firing will be slowed to allow the lagging zone to catch up.

Setting the LAG feature lower than 10 degrees can substantially increase the firing times since the kiln can only fire as fast

as the slowest zone. The factory default setting is 10 degrees. This setting is recommended for most firings.

The maximum LAG setting is 50 degrees. This setting will give the fastest firing times with the least amount of Zone Con-

trol. To change the Lag setting follow these steps:

Press MENU repeatedly until the display reads “LAG”
Press ENTER
Change the current lag setting and press ENTER

If “LAG” does not appear as a MENU item, the kiln is set for single Zone Control. Follow the instructions for changing to 2

or 3 Zone Control and the “LAG” feature will appear.

THERMOCOUPLE OFFSETS

It is possible to make individual sections of the kiln fire hotter or cooler by using this feature. The maximum offset that can

be used is 50 degrees. This feature can be used to fine tune the kiln using pyrometric cones on shelves in the various sections.

In most cases it is not necessary to offset the thermocouples and if done wrong it can cause firing problems which are dif-

ficult to diagnose. Please contact the factory to attain instructions for this feature.

SETTING SINGLE ZONE, 2 AND 3 ZONE CONTROL

As mentioned earlier there are times when you may want to operate the kiln without the 2 or 3 Zone Control feature.

When elements begin to weaken the kiln may lose the ability to complete a firing in zone control mode or extend firing times

beyond acceptable limits. This will happen when the kiln lacks the power to maintain minimum temperature rate increases when

1 or 2 of the sections cycle off to allow a slower section to catch up with the program. This will express itself as an Err1 error if

the kiln is unable to maintain a temperature rate increase of at least 12° an hour and the controller will stop the program.

If your firing does not require the tight temperature control of zone control and adjusting the lag will not solve the problem

the second option is to turn Zone Control off completely and have the kiln cycle all sections together using the input of only the
center thermocouple.

This is only a temporary solution. We suggest that you find the root source of the problem

which will most likely be the need for new elements.

Turn Zone Control Off and On

Press MENU repeatedly until the display reads “rSEt”
Press “4,4,3”
Press MENU repeatedly until the display reads “noTC” (Number of Thermocouples)
Enter “1” for single zone or no Zone Control

nique

odel

eaTures