Novanta SYNRAD Pulstar p100, Руководство пользователя

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FOCUSING OPTICS PAGE | 36
Temperature set-point
Choosing the correct coolant temperature is important to the proper operation and longevity of your
laser. When coolant temperature is lower than the dew point (the temperature at which moisture
condenses out of the surrounding air), condensation forms inside the laser housing leading to failure of
electronics and damage to optical surfaces.
The greatest risk of condensation damage occurs when the laser is in a high heat/high humidity
environment and the chiller’s coolant temperature is colder than the dew point of the surrounding air or
when the system is shut down, but coolant continues to flow through the laser for extended periods of
time.
The chiller’s temperature set-point must always be set above the dew point temperature. In cases where
this is not possible within the specified coolant temperature range of 18 °C to 22 °C (64 °F to 72 °F), then
the following steps MUST be taken to reduce the risk of condensation damage.
•
Stop coolant flow when the laser is shut down.
•
Increase coolant flow by an additional 1.0 GPM. Do not exceed a coolant pressure of 60 PSI (4.1
bar).
Table 3-2 Gas purge specifications.
Pure Gas Specification
Nitrogen High Purity Grade 99.9500% purity or better
Air Breathing Grade 99.9996% purity or better
Air
Compressed 99.9950% purity or better, water-free; oil filtered to 5 mg/m3 or better; particulate
filtered to < 1.0 micron; dried to lower dew point below coolant temperature setpoint
Gas Purge Port
Apply a gas purge pressure between 0.14–0.34 bar (2–5 PSI) or a flow rate of 849–1699 liters/hour (30–
60 SCFH). Do not exceed a pressure of 0.34 bar (5 PSI). Use only nitrogen or CDA
(Clean, dry air) as a purge gas. Do not use any other gas as this could damage the laser.
• Air-condition the room or the enclosure containing the laser.
• Install a dehumidifier to reduce the humidity of the enclosure containing the laser.
• Purge the laser - See Gas Purge Specifications.
Flow Rate
Set coolant flow according to the following table. Ensure that coolant pressure does not exceed 60 PSI
(4.1 bar).
Table 3-3 p100/150 water flow rate.
Laser Type Minimum Water Flow Rate Recommended Water Flow Rate
P100/150 1.5 GPM (5.7 LPM) 2 GPM (7.58 LPM)