Barnstead International MIRAK 725 Series, Operation Manual And Parts List, Page: 26 / 36

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positive or negative. The number on the display
is positive if the HOT light is on. If the HOT light
is off the number on the display is negative.
9. Refer to the difference that you recorded in step
#3. If that difference was greater than +3, turn
the knob CLOCKWISE, counting each click of
the knob until you have advanced the knob the
same number of positions as the difference you
calculated in step #3, then turn the knob one
additional click. (The knob is detented so you
can feel a click at each one degree position on
the knob. Do not turn the knob a full rotation). If
the difference you recorded in step #3 was less
than -3, turn the knob COUNTERCLOCKWISE,
counting each click of the knob until you have
advanced the knob the same number of posi-
tions as the difference you calculated in step #3,
and then one additional click.
10. Push the heat knob again. The PROBE, SET
and TOP lights will no longer be illuminated.
11. Turn the power switch to the OFF position,
unplug the cordset from the power source, and
allow the top plate to cool completely.
12. Remove the bottom cover again and move the
black plastic jumper on the logic board so it is
attached to only one pin at position J1.
13. Replace the bottom again. The unit is now with-
in tolerance and no further adjustment is neces-
sary until the top plate assembly or the logic
board is removed again.
M
AINTENANCE AND
S
ERVICING