DC2200 Firmware Changes V 1.0.13 The fan voltage can be set from 6 V to 13 V with a resolution of 0.1 V and an accuracy of ±0.5 V. This can be done within the Setting”. Click on to go to page 2. The menu “System “more …” item Voltage” can be found there. “Fan Operation of non-Thorlabs LEDs and other light sources The DC2200 was designed to drive LEDs including non-Thorlabs LEDs. Thorlabs LEDs feature an EEPROM which stores all relevant data about the LED including the forward voltage. A test function was created for the operation of non-Thorlabs LEDs. A small current of 5 mA is driven and the resulting voltage is measured. Assuming a characteristic current-voltage (I-V curve), the maximum voltage is calculated and set as the maximum forward voltage. If the LED has an additional ohmic resistance due to large conductors, the calculated forward voltage may be too small. This results in a output voltage protection was tripped “LED – check connection.” error. The LED will be switched off. Head” function is After clicking on the Head” button in the Setting” “Meas “Test “LED menu an additional button Head” appears (only when non-Thorlabs light sources “Meas without an EEPROM are connected). This function drives different currents up to the “User Current Limit” and measures the resulting voltage. The max forward voltage is determined and the light source can be driven up to its maximum current without errors.
DC2200 Firmware Changes V 1.0.13 The fan voltage can be set from 6 V to 13 V with a resolution of 0.1 V and an accuracy of ±0.5 V. This can be done within the “System Setting”. Click on “more …” to go to page 2. The menu item “Fan Voltage” can be found there. Operation of non-Thorlabs LEDs and other light sources The DC2200 was designed to drive LEDs including non-Thorlabs LEDs. Thorlabs LEDs feature an EEPROM which stores all relevant data about the LED including the forward voltage. A test function was created for the operation of non-Thorlabs LEDs. A small current of 5 mA is driven and the resulting voltage is measured. Assuming a characteristic current-voltage (I-V curve), the maximum voltage is calculated and set as the maximum forward voltage. If the LED has an additional ohmic resistance due to large conductors, the calculated forward voltage may be too small. This results in a “LED output voltage protection was tripped – check connection.” error. The LED will be switched off. “Meas Head” function is After clicking on the “Test Head” button in the “LED Setting” menu an additional button “Meas Head” appears (only when non-Thorlabs light sources without an EEPROM are connected). This function drives different currents up to the “User Current Limit” and measures the resulting voltage. The max forward voltage is determined and the light source can be driven up to its maximum current without errors.
DC2200_Firmware_Changelog_v1.0.13.docx