NORTHROP GRUMMAN Patara I User Manual

Contents

NORTHROP GRUMMAN Patara I User Manual Manual pdf 26 page image

Chapter 3: System Details© 2018 Cutting Edge Optronics, Inc. 14 Patara I and II Laser User ManualTable 3-2. Cooling System RequirementsChiller and Cooling System RequirementsCapable of recommended flow rate at 60 psi1Optishield Plus mixed with distilled water per manufacturer’sinstructionsFilter connected between chiller and inlet on laser3Chiller Heat Capacity > Laser Power ConsumptionFlow sensor (installed internally on Patara lasers)4Replace coolant and filter monthly1 The actual operating pressure should be lower than 60 psi. It is acceptable if the chillercan achieve the required minimum flow rate through the laser with a lower waterpressure (typically around 55 psi).2 Clean coolant keeps coolant lines from clogging. Untreated tap water may causedamage. Suitable coolants include: Optishield Plus from Opti Temp Inc., Traverse City,Mich., (231) 946-2931.3 The filter should be capable of removing particles 5 μm or larger. The filter and coolantshould be replaced each month or more frequently if the pH drops below 9 or the filter orcoolant show any discoloration.4 When not using NG drive electronics, verify that flow sensor interrupts current todiodes less than 500 ms after a low flow condition occurs.Table 3-3. Avoid with ChillersAvoid with ChillersDeionized water1Iron or aluminum parts in plumbing loopOperation below air condensation temperature21 The Patara laser has exposed bare copper inside the coolant loop. For this reason,Northrop Grumman does not recommend using untreated deionized (DI) water. If DIwater is used as the coolant, it is important to maintain the water resistivity between 300and 700 K ohms and to keep the water slightly basic (i.e., keep the water above 8.0 pH).2 The Patara laser is environmentally sealed, but not hermetically sealed. Atmosphericconditions near the exterior of the laser will mimic conditions inside laser head.