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Laboratory Service Request 10-00013

Calibration, Maintenance, and Repair

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Urgency: Select Urgency


Industry: Calibration, Maintenance, and Repair


Description: "Calibration Laboratory needed for repair or calibration of PMS Lasair-210 Particle counters and one Lasair-110. All of which were running good and calibrated. I have one spare 210 unit for parts as well. The manufacturer no longer supports in any way these units. . RECEIVED SIZING PARTICLES AT ONE-THIRD OF ACTUAL SIZE. REPLACED PRECISION RESISTOR ON THE PHOTODETECTOR MODULE AND ADJUSTED OFFSET VOLTAGE TO PREVENT FALSE COUNTING. THIS MODEL IS NO LONGER SERVICED BY THE MANUFACTURER. AMPLIFIER CIRCUIT SERVICING THE 0.2-0.7 um CHANNELS HAS A 12.6V, 24 kHz SINE WAVE OF UNKNOWN ORIGIN WHICH PREVENTS ZERO COUNTING AND PROPER SIZING OF PARTICLES IN THAT RANGE. PARTICLES GREATER THAN 1 um SIZE CORRECTLY ""


Required Laboratory Location: Anywhere

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