FAQs - LumenTrac LT1

Q:  What are some suggested applications for the LumenTrac

A:  Typical applications include stairwells, path of egress/life safety code lighting, mission-critical lighting (examination, inspection, etc.), parking lot/garage lighting and general area lighting.  

Q:  Where do you install it? Does it come pre-installed?

A:   The LT1 can be factory installed in some fixtures, space permitting. It can also be installed remote from the fixture in a suitable enclosure. The maximum controller-to-sensor wiring distance is 10ft with 22AWG wire.

Q:  How many do you need in a space

A:   Typically, one LT1 system can be installed on a “representative” fixture per group of identical fixtures that are switched together in a space. Since each fixture in such a group has the same construction and is turned on and off at the same time, they should all age at the same rate. When the monitored fixture’s LEDs reach end-of-life, the sources in all fixtures in the same group should be replaced.

Q:  Where is it made?

A:   The LumenTrac LT1 is manufactured in Glendale, WI USA.

Q:  How do you circuit the dimming?

A:   The dimming circuit should pass through the LumenTrac controller and then on to the measured fixture’s driver or power supply. Low-voltage, 2-conductor dimming systems can be used (such as 0-10V, DALI, or other digital system). The LumenTrac controller does not load or modify the dimming communications. High-voltage dimming systems cannot be used with the LumenTrac LT1 (phase-cut or dimmed-hot).

Q:  How is this different than other end of life systems?

A:   The LumenTrac LT1 indicates LED end-of-life based on the relative lumen output of the fixture, measured by a light sensor inside the fixture. Other systems run a clock of “operating hours” and signal end-of-life when the fixture has been on for a certain amount of time; this may not be accurate based on the installation environment or if the fixture has been over- or under-designed for heat management.

Q:  When will it be available

A:   The LumenTrac LT1 system will be available at the end of 2nd Quarter of 2014.

Q:  If I add LumenTrac LT1 to a luminaire in the field, will it void the luminaire manufacturer’s warranty?

A:   It should not affect the warranty. However, checking with the specific luminaire manufacturer is recommended.

Q:  What is the voltage between the LumenTrac controller and the sensor board?

A:   3.3 volts DC.

Q:  Once the system detects that the LED source is below L70 and turns on the indicator, can I turn the indicator off until I want to change the LEDs?

A:   No, the indicator will stay on (and the contact closure relay will remain active) until the LEDs are replaced and the system is re-initialized. If the indicator turns on because of dirt accumulation or a failed driver, correcting the issue will clear the indicator warning the next time power is turned off and on; there is no need to re-initialize the system.

Q:  How will the indicator light’s function be described to maintenance personnel several years after a fixture is installed?

A:   A sticker is provided with the system to be applied next to the sensor head.

Q:  What protocol (language) does the LT1 interface with?

A:   The LumenTrac system does not interface with any communications language (BACnet, DMX, DALI, etc.). The dimming relay simply makes or breaks the dimming circuit connection between the dimming control and the fixture’s power supply, and the auxiliary output relay turns on or off to indicate end-of-life. The LumenTrac system was designed to be as “universal” as possible, and therefore does not interface with any protocol other than contact-closure inputs.

Q:  Can the LumenTrac LT1 be configured to indicate end-of-life at a level other than L70?

A:   This is possible but must be factory-programmed; please contact Oldenburg Electronics for more information.

Q:  Does the 30-day timer in “always-on mode” run when power is switched off?

A:   No. The 30-day timer only runs while power is on, and resets to zero if power is turned off. “Always-on” mode should only be used in cases where fixtures are truly on 24 hours a day, every day.