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T-Cube TEC Controller
4.3.6 Control Loop Adjuestment - Recommended Procedure
1) Set the IGAIn and the DGAIn values to 0.
2) Set the PGAIn value to around 5,
3) Change the set temperature.
4) Enable the TEC current and watch the response of the system. Count the number
of overshoots that occur before the temperature settles on the set temperature.
5) Increase the PGAIn val ue and repeat this procedure until the system remains
stable near the set temperature after 3 to 4 overshoots.
6) Slowly increase the DGAIn value while again adjusting the set temperature and
counting the number of overshoots. Increase the DGAIn until the temperature
becomes stable after only 1 or 2 overshoots.
7) Once the PGAIn and DGAIn values have been adjusted, watch the display for a
few minutes with the TEC cu rrent enabled. If the actual temperature remains
slightly higher or lower from the set temperature after the temperature becomes
stable, then increase the IGAIn value until this offset is minimized.
4.3.7 Setting the Display Brightness
The unit will power up with a pre-set brightness level and during
operation, the user can adj ust the display intensity to suit the
optical environment.
Press the Mode button to enter the Setup Menu.
Scroll using the OUTPUT Knob to select the britE menu item.
Press the ENTER button to enter the Display Brightness menu
Use the OUTPUT Knob to set the desired brightness between ‘1’
and ‘16’ then press Enter to set the value.
