CONNECTING
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25
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Use the Gas Purge port to introduce nitrogen or dry, filtered air into the laser housing.
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Air-condition the room or the enclosure containing the laser
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Install a dehumidifier to reduce the humidity of the enclosure containing the laser.
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Increase coolant flow by an additional 3.8 lpm (1.0 GPM). Do not exceed a coolant pressure of 414
kPa (60 PSI).
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Refer to Table 1-2 and gradually increase coolant temperature until it is above the dew point
temperature and condensation disappears. Do not exceed a coolant temperature of 28 °C (82
°F).
Table 1-2 provides dew point temperatures for a range of air temperature and relative humidity values.
Remember that the laser’s coolant temperature must be set above the dew point temperatures given in
the chart; however, for best results and performance, use a coolant temperature in the range of 18 –22 °C
(64–72 °F).
Table 1-2 Dew point temperature
To use Table 1-2, look down the Air Temp column and locate an air temperature in Fahrenheit or Celsius
(°C values are shown in parentheses) that corresponds to the air temperature in the area where your
laser is operating. Follow this row across until you reach a column matching the relative humidity in your
location. The value at the intersection of the Air Temp and Relative Humidity columns is the Dew Point
temperature in °F (or °C). The chiller’s temperature setpoint must be set above the dew point tempera-
ture. For example, if the air temperature is 85 °F (29 °C) and the relative humidity is 60%, then the dew
Caution: Possible Equipment Damage
Operating the laser at coolant temperatures above 22 °C (72 °F) may result in decreased
performance and/or premature failure of electronic components.
