THORLABS ITC1 Series, Operation Manual

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© 2018 Thorlabs GmbH 30
ITC1xx
6.3 ITC100D Adjustment
The ITC100D is factory adjusted. However, in order to ensure the best display accuracy, it is re-
commended to re-adjust it from time to time.
The adjustment is carried out at a single set point, using the adjustment potentiometers P1 to
P6 :
P1 - Adjust I
PD
Inject a known current from an external source into the photo current input (pins A23 and C23
of ST1 ). The current should be about 90% of full scale.
Use P1 to adjust the display reading to the input current value.
P2 - Adjust I
LD
Set the laser controller to constant current mode. Adjust the laser current limit to maximum cur-
rent and the laser current setting to about 90% of maximum current. Connect an ampere meter
to the laser output pins.
Use P2 to adjust the ITC100D reading to the measured output current.
P3 - Adjust I
LD,LIM
Set the laser controller to constant current mode. Adjust the laser current limit to about 90% of
maximum current and the laser current setting to maximum current. Connect an ampere meter
to the laser output pins
Use P3 to adjust the ITC100D reading to the measured output current.
P5 - Adjust T
ACT
Set the temperature sensor to a well defined temperature and adjust the ITC100D reading to
that temperature using P5.
P4 - Adjust T
SET
Adjust the set temperature to about 90% of the full scale value. Turn on the temperature control
and wait until temperature has settled. Read the actual temperature T
ACT
, switch to T
SET
and
bring the reading in accordance with T
ACT
using the potentiometer P4.
Note
T
ACT
must be calibrated first!
P6 - Adjust I
TEC,LIM
Connect an ampere meter to the TEC output pins. Adjust the TEC current limit to about 90% of
full scale. Adjust the temperature set point to a significant higher value and turn on temperature
control.
Adjust the I
TEC,LIM
reading to the ampere meter value using P6.