LiteMark-XL Light Monitor

By XENON Corporation

LITEMARK-XL LIGHT MONITOR A useful accessory item that can be supplied with the Z-1000 systems is the LiteMark-XL Light Monitor. The LiteMark-XL Monitoring System is a photo-electric detector module that is factory supplied mounted on a lamp housing or sterilization chamber to enable the operator to monitor, on a real-time basis, the performance of a flashlamp system. This capability allows the flashlamp to be changed before the output falls below a predetermined minimum. It does this by sensing the light intensity from each flash which is scattered sideways in the Lamp Housing window and relating it to the side-scattered intensity produced by the same flashlamp when new. The side-scattered intensity produced by the new flashlamp is designated as the "100% level", and the intensity at any later time is compared to that 100% level to produce a percentage value slowly declining from 100% as the lamp continues in use, indicative of the status of the flashlamp at any given time. A correlation chart must be used in conjunction with the LiteMark-XL data to obtain the reduced exposure percentage. MEASUREMENT OF INTENSITY Since the LiteMark-XL detector does not look directly at the flashlamp and is not located at the actual target surface, it does not provide an absolute calibration in Joules/cm² of the energy striking that target surface. It does, however, provide an indirect and real-time means of tracking the target surface exposure at any time if the new-lamp exposure value (the "100% level") has been measured at the target. The correspondence between the actual target surface exposure at any time and the reduced value derived from the LiteMark-XL relative value will remain in close agreement during the entire effective operating life of the flashlamp. The starting exposure (the 100% level) at the target surface must be measured with an exposure (Joules/cm2) measuring instrument having a current calibration certification. The instrument calibration certification should cover the spectral range from 200 nm to 3 microns, the nominal transmittance range of the quartz components in the light path, except in cases where narrow-band exposure data is needed. It should be noted that this real time monitoring procedure has taken place without having to interrupt operation. LiteMark-XL Specifications Accuracy: ±10% Linearity: ±2% Linear Output Range: 0-2 VDC Over Range: 1% (+2.2 VDC) Output Load: 10K Ω, max Relative Light Intensity Signal: +2 VDC nominal output @ 10KΩ Load Decay Time: 600 milliseconds I/O Interface Connector: DB9F, 9-Pin Sub D socket Warm-up Time: 1 minute Power Input: 5+5 VDC ± 5% @ 50 milliamps Operating Temperature: 0-40º C (32-104ºF) Relative Humidity: 10-80% (non-condensing) Outline Dimensions (H x W x L): 3.58 x 15.5 x 3.8 cm (1.5 in x 6.12 in x 1.41 in) Weight: 7 oz. (198 g) Tolerance of output voltage relative to light input Protected for shorts to signal ground Factory calibrated setting Initial flashlamp operating time to achieve peak flash output level Not protected for reverse polarity Specifications subject to change without notification Specifications: LiteMark-XL Light Monitor