Air Purge Collar (E-Ap); Pipe Adapter To Attach Sighting Tubes (E-Pa); Figure 53: Air Purge Collar (E-Ap); Figure 54: Pipe Adapter To Attach Sighting Tubes (E-Pa) - Fluke endurance series User Manual

Endurance® Series
Users Manual

9.2.1. Air purge collar (E-AP)

The Air Purge Collar accessory is used to keep dust, moisture, airborne particles, and vapors
away from the lens. It can be installed before or after the bracket. It must be screwed in fully.
Air flows into the 1/8" NPT fitting and out the front aperture. Air flow should be a maximum of
(0.5 to 1.5 liters/sec or 0.13 to 0.4 gallon/sec). Clean (filtered) or "instrument" air is
recommended to avoid contaminants from settling on the lens. Do not use chilled air below
10°C (50°F).
Focus the instrument before attaching the air purge collar.

9.2.2. Pipe adapter to attach sighting tubes (E-PA)

The Pipe Adapter accessory is used to adapt a 12" (300mm) sighting tube to the Endurance®
device. The E-PA has two inner threads to adapt the outer Endurance® thread (1.5" UNC) to
the outer sighting tube thread (1.5" NPT.

Figure 54: Pipe adapter to attach sighting tubes (E-PA)

62

Figure 53: Air purge collar (E-AP)