685 Series
ComboPak
User’s Manua
l · Page 7
point of zero and ramp up to the desired set point in steps. In this way, if the
laser is wired incorrectly, the safety circuits will trip earlier and minimize any
chance of damaging the laser. Once you have confirmed proper operation, the
set point can be left at the desired operating point, and the output turned on and
off.
If you notice the temperature is oscillating around the set point and not
stabilizing, you may need to adjust the
Gain
setting in the TEC tab of the
Settings
dialog. You can use the AutoTune feature to automatically calculate the
best PID values, or select from a set of eight factory preset values that typically
cover most applications. If you use the factory gains, if the temperature is
quickly jumping up and down, the
Gain
will typically need to be reduced. If the
temperature is slowly moving up and down, try a higher
Gain
. You may need to
experiment with several gain settings to find the ideal value, and for even finer
control, you can set the
Gain
to
PID
and directly set the PID control values.
Continue reading for more detailed operating and installation instructions.
Installation
Installation of the
ComboPak
is very straightforward, as the quick start section
above illustrated. This section will provide additional details and considerations
for installing your
ComboPak
.
After unpacking the unit, make sure all packing materials have been removed
and nothing obscures the ventilation ports on the unit.
Powering Up the Unit
Connect the AC power cord to the unit. You must properly ground the unit by
plugging the supplied power cord into a three prong grounded outlet, or using a
three-to-two prong adapter and connecting the ground tab to earth ground.
Press the power switch, located adjacent to the AC input, into the on (|)
position. The Power LED will light, indicating the unit is operational and return to
the last known operating state.
CAUTION
Do not exceed 250VAC on the line input.
It is critical to maintain the proper voltage input into the
unit. If the actual voltage exceeds 250VAC, damage to
the unit may occur.
