Specifications

6. Locate the black plastic jumper on the
logic board at position J3. (See the illus-
tration of the Logic Printed Circuit
board.) Remove the jumper and secure
it across both pins at position J5. If you
cannot locate the jumper, contact
Barnstead|Thermolyne.
7. Reattach the logic board bracket on
your stirring hot plate model and realign
the pickup slot with the encoder wheel
(refer to the instructions in this manual
for reassembling the logic board with
the encoder wheel). Screw the bottom
cover back on, plug the unit into the
power source and turn the power switch
to the ON position.
8. Push the heat knob once. The digit on
the far right side of the temperature dis-
play will get brighter. This display may
read something other than zero. The
HOT light may be on or off which indi-
cates whether the number on the dis-
play is positive or negative. The number
on the display is positive if the HOT light
is on and negative if the HOT light is off.
9. Refer to the number (absolute value cal-
culated) that you noted in step 3. If that
number was greater than zero + 3, turn
the knob CLOCKWISE, counting each
click of the knob until you have
advanced the knob the same number of
positions as the number you calculated
in step 3, then turn the knob one addi-
tional click. (The knob is 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 number you
recorded in step 3 was more than zero
32
MAINTENANCE AND SERVICING
Note
The temperature display will
read 888 and then 000. The
PROBE, SET, TOP and HOT
lights will all be illuminated.