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Chapter 4 System Setup 33
Making the Coolant Connections
1. Take care that the coolant used is pH neutral. Acidic or alkaline coolant can damage
the camera fittings and internal cooling block through corrosion. Such damage could
be very expensive to repair.
2. Coolant should be no colder than +10° C to +15°C to prevent condensation at 50%
relative humidity. Operating the camera with coolant at a colder temperature could cause
induced condensation in the electronics enclosure and possible catastrophic damage to the
camera when the camera is operating outside of a vacuum enclosure. Damage resulting
from this type of operation may void the warranty.
1. Set up the coolant circulator according to the directions in the user manual for that
equipment. Do not apply power to the circulator until directed to do so.
2. Make the hose connections between the camera and the vacuum flange. Stainless
steel flexible hoses (30" long) with female VCR fittings (Swagelok fittings were
provided for earlier systems) are provided to make the connections. Instructions for
VCR fittings and for Swagelok fittings can be found in Appendix C of this manual.
Note: Figure 7 shows the correct coolant ports for the incoming and outgoing
coolant. These ports are NOT INTERCHANGEABLE.
Figure 7. Coolant Ports
3. Set up the coolant circulator according to the directions in the user manual for that
equipment. Do not apply power to the circulator until directed to do so.
4. Make the hose connections between the vacuum flange and the chiller/coolant
circulator. The tubing should be no longer than necessary.
Recommended Flow Rate and Fluid Pressure
Flow Rate: 2 liters/minute. Users are advised to install a flow meter to monitor the
rate.
Fluid Pressure: 25 psig (maximum).
CAUTION